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HVAC is a broad subject under mechanical engineering, which is based on the principles of thermodynamics, fluid mechanics, and heat transfer. It comprises heating, ventilation, and air conditioning. Understanding the topic demands solid math, science, and computer foundation. But for HVAC engineering students, learning this subject in a short amount of time is rather challenging. Under this situation, HVAC homework help becomes the preferred choice of students. It helps them to finish their homework and also supports them to become academically inclined.

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Topics	Benefits
Introduction to HVAC	Top-notch quality by eminent tutors
Classification of air conditioning system	0% Original work
Load calculation	On-time delivery
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Let us now dive into why students require HVAC homework help.

Lack of subject understanding: Solving HVAC questions requires basic mathematics knowledge. Since HVAC relies on decimals, fractions, unit rates, and other applications of numeration, comfort with numbers is essential. But students encounter issues in this topic since advanced math is a bit difficult for some students.

The HVAC sector is now largely computer-controlled. Students must comprehend the fundamentals of computers, such as input-output devices, simple computer programs, and logic circuits.

The studies of thermodynamics and gas laws are the foundation of HVAC technology. To learn this topic, you must comprehend concepts such as the Ideal Gas Law and the many Laws of Thermodynamics. But lack of conceptual clarity can become a roadblock for you.
Less academic interest in students: The current educational system's extensive coursework, which provides little time for in-depth learning, is one of its fundamental drawbacks. Due to the limited time available, teachers can not give enough attention to each topic. Additionally, because of the absence of direction, they fail to show an interest in the subjects.
Managing extensive homework at once: Complicated coursework requires time and effort. Multiple tasks can make it difficult for students to keep up with the pace of learning. They experience burnout and exhaustion. This fatigue is one of the key reasons for switching to HVAC assistance.
Conflicting priorities: It might be difficult for students to concentrate on their studies when personal emergencies occur. For them, competing priorities create a challenging situation. In these situations, pupils choose to get academic assistance.

HVAC Topics Covered By Our Expert Tutors

Let us dig into the topics our HVAC tutors cover in homework help. You can rest assured that our tutors will carefully handle your tasks if you ask them "Do my HVAC homework solutions".

Introduction to HVAC
Fundamental and scope of HVAC
Mode of heat transfer
Refrigeration cycle
Component of A/C
Refrigerants and types
Classification of Air-Conditioning System
Window Air Conditioning Systems.
Split Air Conditioning Systems.
Central Air Conditioning Systems.
Package Air Conditioning Systems.
Fundamental and scope of HVAC
Air-cooled system of air conditioning.
The chilled water system of air conditioning.
The air-water system of air conditioning.
The direct refrigerant system of air conditioning.
Study of Psychometrics
Properties of Air (DBT, %RH, WB, DPT, enthalpy).
Load Calculation.
Calculation of U factor for wall, glass.
Estimation of Equivalent Temp.

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We frequently receive inquiries such as, "Can I pay someone to do my HVAC homework?". You can find some of your questions answered by going through these FAQs. Contact our executive if you have any questions.

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Several variables affect the time limit. After examining the problem's difficulty level, experts' availability, and the deadline, executives confirm the time it takes. However, we try to finish homework quickly and ensure delivery before the deadline.

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We have experts in the field of HVAC who are knowledgeable and skilled. Hence, we charge for the HVAC homework solutions. Since we compensate our specialists for their time, we do not provide free service. However, it is affordable for students.

Can I Get A Original work HVAC Solution Manual From You?

Academics have been concerned about original work for a very long time. Our HVAC tutors take the following actions to ensure original work:

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Recently Asked HVAC Questions

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Q1: H893 Bench Top Cooling Tower Droplet Arrester t, Air Outlet Temperatures Orifice Connection for Orifice Differential Pressure -3. CAP Water Distrubution System + Connections For Pressure Drop Across Packing PACKED COLUMN Packing Differential Pressure Transducer H890A Make Up Tank H890C H890D 1kW 5kW Main Switch Switch Switch Temperature Indicator Air Inlet Temperature Damper BASE Fan Air Inlet Water Outlet Temperature Basin Float Valve Heaters 0.5 kW 10kW 50.33 Water Flow Transducer Manometer Recirculation Thermostat Pump Heater Current Sensor Data Logger Duplex Temperature and Sensor Input Figure 2. Diagram of the cooling tower setup used in this lab experiment Table 1: List of temperature locations indicated in Figure 2 Symbol Description T₁ Dry bulb temperature for the inlet of the air-water vapor mixture T₂ Wet bulb temperature for the inlet of the air-water vapor mixture T3 Dry bulb temperature for the outlet of the air-water vapor mixture T4 Wet bulb temperature for the outlet of the air-water vapor mixture T5 T6 Temperature of the liquid water inlet Temperature of the liquid water outlet Here we discuss the path for the water flow. The load tank at the right-hand side of the base of the unit houses two electric resistance heaters. The purpose of these heaters is to simulate the cooling load of the power plant. The heated water is pumped from the load tank through the flow control valve and water flow meter to the top of the water distribution system. After its temperature, T5, is measured, the water is uniformly distributed over the top of the packing. As it spreads over the surfaces of the packing, a large surface area film of liquid water is exposed to the air stream. The liquid flows down through the packing and is cooled by the evaporation of a small fraction of the total flow. The cooled liquid falls to the bottom of the packing deck into the basin. It flows past a point where the water outlet temperature Tε is observed and then back into the cooling load tank. It is reheated in this tank before being re-circulated over the same path. The water level in the load tank will drop due to evaporation of water in the packing section. As the water level decreases, water must be added from the makeup tank to the load tank. Under steady-state conditions, the water leaves the makeup tank at a rate equal to the evaporation rate plus any small airborne liquid droplets discharged with the air exiting at the top of the tower (known as drift loss). Here we discuss the path for the air flow. Air flows over the packing via the fan and the flow rate is controlled by the fan damper. The fan discharges air into the distribution chamber where the air passes a dry and a wet bulb thermometer (T1 and T2, respectively) before it enters the base of the packing. As the air stream flows upward through the packing, the water vapor content of the air increases and the liquid water is cooled. As the air exits the tower, it passes through a droplet arrester, which traps much of the entrained water droplets and returns them to the packing. The air then flows past the dry and wet bulb thermometers (T3 and T4, respectively) and is discharged to the atmosphere through the orifice. A nice feature of the bench-top cooling tower is that the whole process can be observed through the transparent structure. Pre-Laboratory Assessment 1. (50 Points) Create schematics identifying all the important mass and energy transfers occurring in the cooling tower system. Further specify the boundary/interface at which each of these mass/energy transfers is occurring. For example, there is forced convection occurring between the air traveling up the cooling tower and the water traveling down the cooling tower. 2. (30 points) The primary objective of the cooling tower is to maximize heat rejection from the power plant to the cooling water. Consequently, it is important to understand the heat transfer mechanisms in the cooling tower. Write down the heat transfer mode(s) for each of the three questions below. (i) How does heat move from the power plant's condenser to the cooling water loop (note: although our experimental system is “mimicking" this process using heaters, it is important to understand how this would occur in a real system)? (ii) How does heat move from the water to the air inside the cooling tower? (iii) Are there any additional areas in the cooling loop (but outside of the cooling tower) where the water will experience energy transfers (work or heat) and/or heat generation? How/why will these energy transfers and/or heat generations occur? 3. (20 Points) Consider a cooling tower that has a fixed cooling load. Changing cooling tower parameters will certainly alter the overall performance of the cooling tower, but does changing these parameters affect the net amount of energy dissipated to the environment via the cooling tower at steady state? Explain. Operating Procedure & Data Collection Students will be operating the cooling tower setup under the four conditions listed in Table 2. The first condition, A, will likely already be set up and data can be collected immediately. In this scenario, this is the only condition within the entire procedure that will reach steady-state. If condition A is not already set up, follow the procedure as shown below. Note that the suggested waiting periods for each condition should be followed closely; the system after the specific times will not be at steady-state, but this is acceptable for the trends being observed. Condition A B C Table 2: List of Experimental Conditions to Test Water Flow (g/s) 40 20 40 40 Air Flow (Pa) Cooling Load(kW) 120 1 120 1 50 1 120 1.5 1. Study the cooling tower carefully. Identify all the parts, instruments and their locations, controls, water paths, and air paths. Read the descriptions of precautions, warnings and protective devices. 2. Open a LabView file and assign a unique name; this file will store all your temperature, water flow, air flow, and cooling load data. 3. Open the LabView program and observe the temperatures displayed on the screen; match the temperature curves with their corresponding thermocouple. Be sure to keep track of the temperatures critical to measuring the efficiency of the experimental cooling tower setup. 4. Take note of the packing density of the cooling tower setup. 5. Turn on the main power switch on the cooling tower setup; this will begin circulating air and water through the system. 6. Ensure that the wet bulb thermocouples and makeup water tank are filled with distilled water. Throughout the experiment, the makeup water tank may need to be refilled; the wet-bulb thermocouples should not need to be refilled throughout the duration of the experiment. 7. Set the system to condition A as specified in Table 2. Water flow can be adjusted by turning the knob above the rotameter. Air flow can be adjusted by rotating the metal disc covering the intake of the compressor. Heat loading can be adjusted by turning the switches labeled "1 kW" or "0.5kW" on or off. 8. Let the system run for 10 minutes; this will allow most temperature readings to reach steady state. During this step, keep the following in mind: a. Your water flow may fluctuate. Be sure to maintain the desired water flow as set by the condition. The float of the rotameter has a top disk. For the most accurate reading of the water flow rate, look at the bottom lip of the top disk. b. Which temperature has not reached steady-state after 10 minutes? How will this impact the calculated cooling tower efficiency? 9. Begin collecting data by clicking “write” every 10 seconds for 5 minutes. You should end up with 30 data points. 10. Set the system to condition B as specified in Table 2. Required changes from the previous condition are shown in red. 11. Let the system run for 6 minutes. Observe the trends for the critical temperatures. During this step, keep the following in mind: a. Your water flow may fluctuate. Be sure to maintain the desired water flow as set by the condition. The float of the rotameter has a top disk. For the most accurate reading of the water flow rate, look at the bottom lip of the top disk. b. Which temperature has not reached steady-state after 6 minutes? How will this impact the calculated cooling tower efficiency? 12. Begin collecting data by clicking "write" every 10 seconds for 1 minute. You should end up with 6 data points. 13. Set the system to condition C as specified in table 2. Required changes from the previous condition are shown in red. 14. Let the system run for 6 minutes. Observe the trends for the critical temperatures. During this step, keep the following in mind: a. Your water flow may fluctuate. Be sure to maintain the desired water flow as set by the condition. The float of the rotameter has a top disk. For the most accurate reading of the water flow rate, look at the bottom lip of the top disk. b. Which temperature has not reached-steady state after 6 minutes? How will this impact the calculated efficiency? 15. Begin collecting data by clicking "write" every 10 seconds for 1 minute. You should end up with 6 data points. 16. Set the system to condition D as specified in table 2. Required changes from the previous condition are shown in red. 17. Let the system run for 8 minutes. Observe the trends for the critical temperatures. During this step, keep the following in mind: a. Your water flow may fluctuate. Be sure to maintain the desired water flow as set by the condition. The float of the rotameter has a top disk. For the most accurate reading of the water flow rate, look at the bottom lip of the top disk. b. Which temperature has not reached-steady state after 8 minutes? How will this impact the calculated efficiency? 18. Begin collecting data by clicking "write" every 10 seconds for 1 minute. You should end up with 6 data points. 19. Set the system to Condition A before shutting down the entire system. Data and Analysis Deliverables The data and analysis deliverables for this part of the design project will not be submitted at this time. It will instead be submitted alongside the Part 3 results as a Combined Part 2 + 3 Report. A preview of the Part 2 data and analysis deliverable that will be submitted with Part 3 is shown below: Create a main effects plot (See Appendix A) for the experimental results you collected during Part 2 of the experimental design project. Note that when showing air flow in this plot, you will need to convert the pressure units (see Table 2) into mass flow rate units for airflow (see Appendix C). Hence water and air flow in this plot should be evaluated in terms of mass flow rate. The heat load in this plot should be evaluated in terms of kilowatts. For the purposes of creating the main effects plot, please use Condition A as the "default" case (see Table 2 and Appendix C). When creating this main effects plot, you may consider Condition A, B, and D to all have the same air mass flow rate (even though your pressure data for these conditions may be slightly different from one another). Be sure to indicate the total uncertainty in the main effects plot via the inclusion of error bars and as "+" signs in your text/tables. Your analysis should combine the precision and bias uncertainty in the proper manner to yield the total uncertainty. The required cooling tower specifications and relevant bias errors are in Appendix B. Discuss all of the conclusions that can be drawn from this main effects plot. Identify the 2 factors with the strongest influence on the experimental cooling tower efficiency. Your conclusions from the main effects plot should relate your observations to underlying fundamentals in thermodynamics, heat transfer and fluid mechanics, as well as discuss the implications of your uncertainty analysis. Appendix A) Main Effects Plots The data and analysis deliverable asks you to compare the relative effects of multiple factors on a single graph. Comparing these factors in graphical format is more easily visualized by normalizing the factor levels against their minimum value. This normalization process helps eliminate distortions caused by the factor levels having different units and/or widely varying absolute values. An example of this normalization process is shown in the Table 3 and Figure 3 below. This example illustrates the effects of two factors on the kinetic energy of a car. Table 3 illustrates five experiments wherein the factors (mass, m, and velocity, v) are varied and the corresponding response variable is determined (kinetic energy, KE). Similar to the data provided to you in this project, the first experimental case consists of default levels. In the remaining cases, the level of one factor is systematically varied (shown in red) while the other factor is left at the default value. Normalization is conducted by dividing each factor level, L, by the respective minimum factor level, Lmin (see column 4 in the table below): Table 3. Example data for the effect of two factors (mass and velocity) on the response variable (kinetic energy) of a car Response Variable (y-axis) Factors & Corresponding Lvels (x-axis) Case Name Mass (kg) Velocity (m/s) Normalized Level Value for the Factor that is Varied (x- axis) Kinetic Energy (kJ) Default 1500 20 m = v = 20/10 = 2 1500/800 300.0 = 1.875 Slow Velocity 1500 10 v = 10/10 = 1 75.0 Fast Velocity 1500 30 v = 30/10 = 3 675.0 Light Car 800 20 m = 800/800 = 1 160.0 Heavy Car 2500 20 m = 2500/800 = 3.125 500.0See Answer
Q2: AREN 4110/5110 BUILDING ENERGY SYSTEMS ENGINEERING Spring 2024 PROJECT 3: CONCEPTUAL DESIGN OF BUILDING ENERGY SYSTEMS Project Description The final project for this course will involve the conceptual design of an HVAC system for a building. Rather than focus on the detailed calculations of loads, equipment selection, and component sizing, this project will focus on the consideration of different types of systems to meet the design requirements. You will specifically be asked to explore the opportunities and risks of one or more low-energy systems, de- velop a conceptual design of a system for the application, and compare the expected performance with more conventional approaches. For this project, you have been charged with developing system strategies for heating, cooling, dehumidi- fying, humidifying, and ventilating small regional museums, proposed as part of a UNESCO program to promote the repatriation and relocation of artwork and artifacts previously held in large metropolitan mu- seums far away from the site of origin. Specifically, the objectives are to better connect visitors with the local historical context of the artwork and artifacts, reduce concentration of mass tourism by promoting a more distributed network of touristic destinations, and more equitably share the economic benefits of tourism across a country. Coincidentally, these museums would be ideal recipients of artwork and arti- facts previously held in mostly Western museums and considered for repatriation. Each group is assigned a geographic location according to the following table: GROUP 1 2 3 4 LOCATION Fairbanks, Alaska St. John's, Newfoundland Luxor, Egypt Timbuktu, Mali Nizwa, Oman 5 10 6 Darwin, Australia 7 Pokhara, Nepal 8 Chiang Mai, Thailand 9 Nelson, New Zealand 10 Quito, Ecuador 11 Ouro Preto, Brazil 12 Maputo, Mozambique The detailed architectural design has not yet been developed, but the overall floorspace is 5,000 m² over two stories, with roughly 3000 m² of exhibit space, 1000 m² of storage, 500 m² of administrative and classroom space, 300 m² circulation space, and 200 m² cafeteria with cooking facilities to serve staff and visitors with breakfast and lunch. A small portion of the floor area will be designed to accommodate art- work with tight constraints on environmental conditions with specialized equipment serving this portion, designed by specialty engineering consultants and outside the project scope. In contrast, more than 90% of the museum is conditioned to less stringent comfort conditioning requirements, which are temperatures between 21-24°C and relative humidity between 30-50%. APRIL 18, 2024 PAGE 1 OF 3 AREN 4110/5110 BUILDING ENERGY SYSTEMS ENGINEERING Spring 2024 Potential Technologies Your HVAC system should seek to be highly energy efficient. You might include any combination of the following technologies: • • Demand controlled ventilation Airside and waterside economizers Displacement ventilation or underfloor air distribution Indirect or direct evaporative cooling Heat recovery for outdoor air preconditioning Ground loop system with individual water loop heat pumps in the zones Ground source heat pumps to heat and cool water for building circulation Dedicated outdoor air system (DOAS) with demand-controlled ventilation Chilled beams Radiant heating and cooling with DOAS • Desiccant cooling and dehumidification systems • Thermal energy storage systems Heat recovery between different processes, e.g., from space cooling to preheat DHW needs Approach The main objective is to minimize building energy use while meeting the heating, cooling, dehumidifica- tion, humidification, and ventilation needs of the building. You should consider the following steps in your process: 1. Each team has a different location and, in most cases, a different climate. Your first task is to evaluate the characteristics of the climate to explore systems that take advantage of environmen- tal conditions. For example, evaporative cooling would not be a good choice for Miami, natural ventilation would have limited use in Phoenix, and a desiccant dehumidification system would not make much sense in Denver. There are many tools available, especially those targeted at ar- chitects. Climate Consultant is a useful tool for the analysis and is available at https://www.sbse.org/resources/climate-consultant. 2. Develop a proposal for an HVAC system design for your building needs. The system must meet all heating, cooling, dehumidification, humidification, and ventilation needs of the building at de- sign conditions. It must also demonstrate low annual energy consumption. You should explore the rich literature of design practices and case studies on climate sensitive design of building en- ergy systems for inspiration and insights. For example, explore https://www.wbdg.org/additional- resources/case-studies. 3. You should seek to evaluate the opportunities for energy savings over a conventional VAV HVAC system. Ideally, you would be able to perform an annual energy analysis of both your sys- tem and the conventional baseline system using one of several building energy modeling tools. However, this course intentionally avoided commercial modeling tools and you are not expected to learn them at this point in the course. Rather, you should examine the engineering literature for case studies or other sources of insight into potential savings. You should describe your energy performance in terms of the energy use intensity (EUI) expressed as annual energy use per square meter of building floor area in units of kWh/m². You should also consider the annual en- ergy cost savings and the reported cost premium of the proposed system over a conventional sys- tem. 4. Identify commercially available products for your selected HVAC system. Who makes them? What are their features? APRIL 18, 2024 PAGE 2 OF 3 AREN 4110/5110 BUILDING ENERGY SYSTEMS ENGINEERING Spring 2024 There are many resources available for your project. We strongly encourage you to examine the ASHRAE Advanced Energy Design Guides that are available for free download from the ASHRAE web- site (https://ashrae.org/technical-resources/aedgs). The most relevant would be the zero energy guide for small to medium office buildings. The US Department of Energy also has considerable resources on their websites. Deliverables Your deliverable should be a PowerPoint presentation describing your work. The presentation should include a description of your climate and the HVAC needs of the building, description and schematic dia- gram of the proposed HVAC system, description and justification of how the proposed system will meet all the HVAC needs of the building, the opportunities for energy or cost savings over conventional tech- nologies, and a description of specific products available. Each team must include an estimate of the po- tential annual energy savings over a conventional system of VAV air handlers with overhead diffusers, air-cooled chiller, and gas hot water boiler. Each team will prepare an eight-minute presentation to be delivered during the final exam period You are asked to take advantage of the Notes section of the page to meaningfully supple- ment the screen image with supporting information. APRIL 18, 2024 PAGE 3 OF 3See Answer
Q3: Bahrain Polytechnic بوليتكنك البحرين Assessment Cover Sheet Assessment Project Assessment Due Date 15-June-2024 Individual Not must-pass Course Code EN8918T Applied and Process Heat Transfer Course Title Internal Moderator's External Examiner's Learner ID Date Learner Name Programme ENT8070 Programme Bachelor of Engineering Technology (Chemical and Industrial Processes) Lecturer's By submitting this assessment for marking, I affirm that this assessment is my own work. Learner Signature Instructions: 1. This cover sheet must be completed (section in red below) and attached to your assessment before submission in hard copy/soft copy. 2. The time allowed for this assessment is 11 days. 3. This assessment carries 30% marks distributed to a total of 3 questions assessing CILO 1,2,3 & 4. 4. The materials allowed for use in this assessment are textbooks and other open resources. 5. The use of generative Al tools is strictly prohibited. 6. References consulted (if any) must be properly acknowledged and cited. 7. The assessment has a total of 9 pages (including this page) Do not write beyond this line. For assessor use only. Assessor's Name Marking Date Comments: Biraju J Sanghavi Maks Obtained Page 1 of 9 2023-24_S3_EN8918T_Applied and Process Heat Transfer_Project CILO CILO No. 1 2 3 4 Integrate specialist theories, principles and concepts of the modes of heat transfer to critically analyze and evaluate heat transfer in mixed mode situations in practical project settings Apply creative analytical design skills to enhance the rate of heat transfer in complex applications for industrial use Apply industry standard heat transfer techniques to solve complex industrial heat exchanger problems Apply standard investigative methods and design procedure for the thermal analysis of heat exchangers in power plants (Tabel 1: CILOS coverage) Instructions This Assessment contributes 30% of the Final Grade • Evidence must be submitted individual. • Evidence of this assessments are report followed by presentation • • Any plagiarized work will be awarded zero mark. Use Font theme: Times New Roman/Arial/Tahoma, Font size: 12, Paragraphs: 1.5-line spacing. • Student should use textbook and other open resources. • Convert the dimensional units whenever it is necessary • • Upload your long report electronically in Moodle on or before the due date or Submit to your tutor. The total number of pages for this assignment is 9 pages including the cover page. Design and Analysis of Heat Exchanger Scenario: You have been recently appointed as a junior engineer in reputed process engineering consultancy company, engaged to provide detailed engineering for chemical manufacturing and related processes. As a part of technical team, your supervisor asked you to complete several tasks related to thermal design and analysis of heat exchanger. Tasks mainly includes analyze types of heat exchangers, thermal design of a) double pipe heat exchanger, b) single effect evaporator, and c) condenser. Page 2 of 9 Task 1 (Analysis the types of Heat Exchanger) Analyse given type of heat exchangers with respect to Labelled schematic diagram. (20 Marks) (i) (ii) Working principle (iii) 3 or more Advantages and Disadvantages (iv) 3 or more Industrial Applications. Heat Exchanger Types a) Double Pipe Heat Exchanger b) Sheel and Tube Heat Exchanger c) Plate and Frame Heat Exchanger d) Forced circulation evaporator Note: Plagiarism will be checked at Moodle Task evidence: - - Theoretical report with clear labelled diagrams Power point slides - List of references Page 3 of 9 Task 2 (Thermal Design of Double Pipe Heat Exchanger) (45 Marks) Perform thermal design and analysis of for given case of double pipe heat exchanger, and answer the following Case: A double pipe heat exchanger is used to cool A Sulfuric acid from B to C by D water with initial temperature E. The internal diameter of inside and outside pipe are F and G respectively, while thickness of both pipes is 1.25 cm. Sulfuric acid is flowing through the inside pipe. Data: Properties at mean temperature Density, (kg/m³) Specific Heat Capacity, (kJ/kg.K) Thermal Conductivity (W/m.K) Dynamic Viscosity, (Pa.s) Sulfuric acid Water 1800 998.2 1.465 4.186 0.3023 0.668 11.194 x 10-3 1.1 x 10-3 (Tabel 2: chemical properties for task 1) Thermal conductivity of metal pipe is 46.51 W/(m.K) Note: Show your calculations with formula and substitution. - Use 3 significant figures of values in calculator. Students must use their respective assigned values of A, B, C, D, E, F, G from table 3 Use the Dittus-Bolter correlation to calculate inside and outside heat transfer coefficients. Evaluate: (i) Outlet water temperature (°C) (2 Marks) (ii) Draw Temperature vs Length profile (Parallel and Counter flow) (2 Marks) (iii) (iv) Log mean temperature difference (LMTD) (Parallel and counter flow) (6 Marks) Inside heat transfer coefficient (h;) in (W/m².K) (6 Marks) (v) Outside heat transfer coefficient (ho) in (W/m².K) (6 Marks) (vi) Overall heat transfer coefficient in (W/m².K) (4 Marks) (vii) (viii) (ix) Area and Length of heat exchanger by LMTD analysis (Parallel and Counter flow) (4 Marks) Area and Length of heat exchanger by effectiveness-NTU analysis (Parallel and Counter flow) (10 Marks) Discuss above results (5 Marks) Page 4 of 9 Task 2 (Double Pipe HE) Assigned Data S.N. ID A B C D E F G Tons/Day (°C) (ºC) Tons/Day (°C) (cm) (cm) 1. 202306605 301 61 41 501 10 7.6 12.6 2. 202306668 302 61.5 41.5 502 10.5 7.7 12.7 3. 202306600 303 62 42 503 11 7.8 12.8 4. 202306606 304 62.5 42.5 504 11.5 7.9 12.9 5. 202306610 305 63 43 505 12 8 13 6. 202306657 306 63.5 43.5 506 12.5 8.1 13.1 7. 202306763 307 64 44 507 13 8.2 13.2 8. 202306659 308 64.5 44.5 508 13.5 8.3 13.3 9. 202306618 309 65 45 509 14 8.4 13.4 10. 202306712 310 65.5 45.5 510 14.5 8.5 13.5 11. 202306607 311 66 46 511 15 8.6 13.6 12. 202306599 312 66.5 46.5 512 15.5 8.7 13.7 13. 202306714 313 67 47 513 16 8.8 13.8 14. 202306658 314 67.5 47.5 514 16.5 8.9 13.9 15. 202306694 315 68 48 515 17 9 14 16. 202306642 316 68.5 48.5 516 17.5 9.1 14.1 17. 202306762 317 69 49 517 18 9.2 14.2 18. 202306644 318 69.5 49.5 518 18.5 9.3 14.3 19. 202306646 319 70 50 519 19 9.4 14.4 20. 202306641 320 70.5 50.5 520 19.5 9.5 14.5 21. 202306617 321 71 51 521 20 9.6 14.6 22. 202306611 322 71.5 51.5 522 20.5 9.7 14.7 23. 202306750 323 72 52 523 21 9.8 14.8 24. 202306693 324 72.5 52.5 524 21.5 9.9 14.9 25. 202306751 325 73 53 525 22 10 15 26. 202306754 326 73.5 53.5 526 22.5 10.1 15.1 27. 202306621 327 74 54 527 23 10.2 15.2 28. 12010919 328 74.5 54.5 528 23.5 10.3 15.3 29. 202306643 329 75 55 529 24 10.4 15.4 30. 202306679 330 75.5 55.5 530 24.5 10.5 15.5 (Tabel 3: Assigned data for task 2) Task 2 (Double Pipe HE) evidence: Problem solution with detail calculations, formula and substitution Discussion of the results (maximum 2 pages) Results power point presentation List of references Page 5 of 9See Answer
Q4:Q1: The following data refer to public hall Winter AC system: 100% Outdoor conditions: P= 101.3 kPa, tab=5°C; Supply conditions: tab = 30°C; = 45% Seating capacity of the hall = z Outdoor air supplied = 0.3 m³/min/person = 3 g/kga If the required comfort condition is achieved by THREE processes: • first preheating, • then adiabatic humidification till = 80%, and finally reheat process to the supply conditions, Draw all processes on the Psychrometric Chart and determine: 1. The air dry-bulb temperature and relative humidity after preheating process 2. The heating capacity of the preheater, in (kW). 3. The heating capacity of the reheater, in (kW). 4. The mass of water required in the humidifier, in (kg/hr). 5. The effectiveness of the humidifier Q2: If the total pressure in Q1 is P= ??, Solve it again using Equations.See Answer
Q5:An 8-foot high, uninsulated basement wall has 1-foot extended above ground level. The basement air temperature is 55°F, the average outside air temperature is 45°F, and the average ground surface temperature is 35°F during a cold 31-day month in winter. Estimate the total heat loss per square foot [Btu/ft²] through the basement wall during the month. Position on Wall At [days/mon] => 31 744 Tground surface 35°F => At [hr/month] => Toutside air => 45°F 55°F Tbasement air => AT => 20°F Month Exposed to OA Uwall => Btu/ft² hr °F Qwall [Btu/ft²-hr] => Qwall [Btu/ft²] => Uwall => Btu/ft² hr °F Qwall [Btu/ft²-hr] => 0-1 ft Qwall [Btu/ft²] => Uwall => Btu/ft² hr °F Qwall [Btu/ft²-hr] => 1-2 ft Qwall [Btu/ft²] => Uwall => Btu/ft² hr °F Qwall [Btu/ft²-hr] => 2-3 ft Qwall [Btu/ft²] => Uwall => Btu/ft² hr °F Qwall [Btu/ft²-hr] => 3-4 ft Qwall [Btu/ft²] => Uwall => Btu/ft² hr °F Qwall [Btu/ft²-hr] => 4-5 ft Qwall [Btu/ft²] => Uwall => Btu/ft² hr °F Qwall [Btu/ft²-hr] => 5-6 ft Qwall [Btu/ft²] => Uwall => Btu/ft² hr °F Qwall [Btu/ft²-hr] => 6-7 ft Qwall [Btu/ft²] =>See Answer
Q6:Ventilation air at 3500 cfm, 55°F and 40% RH is to be conditioned to 70°F and 55% RH. Atmospheric air pressure is 14.7 psia. Determine: 1. Mass flow rate of dry air, 2. Mass of water added, 3. Humidity ratio at the entrance of the air handling unit, 4. Humidity ratio at the exit of the air handling unit, 5. Energy required for the process using the psychrometric chart, and 6. Estimate of energy required using approximate relationships.See Answer
Q7: Building Services Applications UBLMTB-30-20 Coursework CW2 Brief UWE Bristol England University of the West of Contents Introduction Questions Section A - Electrical Section B - Acoustics Section C Ventilation - page 3 page 5 A page 5 page 7 page 9 2 Introduction The Analysis and Calculation Report requires you to demonstrate, that you can perform the analytic procedures introduced in lectures during the semester. Whereas coursework 1 was predominantly focused on whole building design, this brief asks you to focus on a single space and think about design coordination and how the different themes interact. The following subjects are covered: ● ● Electrical Design Acoustics Air Distribution System Design The key aim of this coursework is to demonstrate your methodology and an understanding of the techniques. Where drawings are requested these can be digital or neat hand drawings. The most important aspect is that they are clear. You do not need to use CAD unless you find it simpler. Marks will be awarded for clarity, accuracy, and methodology, not for the drawing technique selected. Word Count: The words in this report are simply to describe your calculations and methodology. Most of your report should be tables, diagrams, and calculations. Make sure you explain on your drawings any decisions and rationale. Coursework Submission: This coursework should be submitted digitally, and key dates are shown on Moodle Please note that the submission deadlines are absolute and based on Moodle server time, therefore you are strongly advised to submit work well ahead of the deadline dates to avoid situations where penalties could be incurred. The new regulation on the Late Submission Window allows students to submit their assignments no later than 48 hours after the submission deadline. Please submit it as a single PDF file. Only use additional files as appendices if absolutely necessary. Please try to put any layouts and drawings in order within the report and not as an appendix unless you feel unable to do this. Note: you can use a screen grab within the report and then use a clearer PDF as an appendix if this is easier. If you wish to use a spreadsheet for your calculations, then all information should be clearly laid out within the report, showing working through of all formulas and any key results stated clearly in the report. 3 It is recommended to show one clear example that covers all calculations with any repetitive formula covered within the spreadsheet. If any specific requirements are requested in the document then these should be clearly answered in the report. Note that you are marked on the quality and clarity of the drawing and information that you submit. 4 Questions: Section A - Electrical Design (40 Marks) Alongside this brief you are provided with the site plan for the building, floor plans for each level, and a floor plan for a L01 - Library. 1. Load Assessment Using the proposed development answer the following: 1. Develop an outline electrical distribution plan for the building showing an MV/LV transformation point, a main LV board, mains-cables and sub-main distribution boards, sub-mains board etc. You can use illustrations to supplement your answer. (20marks) 2. Write a description of the factors that are considered when estimating the overall Maximum Load Calculation for this type of building. (15 marks) 2. Cable Calculation (35 Marks) (5 Marks) In this section, the student is required to show all the tables in their coursework and reference them accordingly. ● You are required to calculate the size of a cable connecting an electrical load to a distribution board. The size of the load – in kW – is determined by adding the last four digits of your UWE student ID number together and adding the result to 25. e.g. If your ID is 09876789 you would have a design load of 55kW. The route your cable must follow from the distribution board to the load is as follows: From the distribution board the cable is clipped on a cable tray and runs vertically on a wall to the edge of the building envelope, a distance just short of 25m. There are 5 other cables - each assumed to be carrying a full load – sharing the tray. The cable runs through 200mm of thermal insulation when exiting the building. The cable then runs underground on its own for 275m directly buried in the soil, to where it meets the load. The thermal resistivity of the soil is less than 2.5K.m/W. Select an appropriate cable type (4A3) and the number of cores for this application and explain your choice. 5See Answer
Q8:5. Which ASHRAE standard is used for specifying thermal comfort in buildings? Determine the optimal air temperature for comfort in a classroom. Include your assumptions and calculations. Explain why it is impossible have an optimal temperature that pleases everyone. (20)See Answer
Q9:4. The building has a zone that has a total cooling load of 300,000 Btu/hr with a sensible load ratio of 0.75. The zone set point is 77 F. The supply air is at 55 F and 90% relative humidity. Determine the required supply air volume flow rate and the zone relative humidity. (20)See Answer
Q10:2. One zone of the building is designed as office for 10 people occupancy. The building inside is maintained at 77 F. The outside air temperature is the 99.6% heating dry bulb temperature. Find the ventilation sensible heat loss. (20) Some constants and unit conversions: air heat capacity C 0.2396 Btu/lb-F, air gas constant R= 0.06856 Btu/lb-R, 1 Btu = 778 lbf-ft, 1 psia = 144 lbf/ft²See Answer
Q11:Consider a building located in Flagstaff, Arizona for problems 1-4. Its wall is constructed as ASHRARE wall type 3. It has 20 reflective double pane windows with dimensions of 6 × 3 ft. 1. The inside temperature is 77 F. The outside air temperature is the 99.6 % heating dry bulb temperature. Find the transmission heat loss from the windows. (20)See Answer
Q12:9.12 A zone of a commercial building in Miami is maintained at 24 C and 50% RH. It is occupied by 12 people from 8 am to 5 pm, each with a computer (100 W), 4 printers (200 W) and a copier (1000 W). The required ventilation flow rate is 7.5 l/s per person. The exterior walls are Wall type 31 with 100 m² of west-facing wall area. The windows are double pane reflective coated windows with 20 m² of area. The design day dry-bulb and wet-bulb temperatures and solar radiation are given in the table below. Determine and plot the components of the total heat gain for the zone. Determine the maximum heat gain, the SHR at this time, and the time it occurs. Draw some conclusions from your analysis. Table 3 shows the hourly ambient dry-bulb and wet- bulb temperature and solar radiation and Table 4 shows the material properties, thermal resistance, UA-value, and capacitance for each wall layer. Please complete Table 4 in the by inputting the correct thermal resistance, UA-value and capacitance of the gray boxes. Table 3: Hour ambient data Time T₁ 1 2 3 4 5 6 7 8 9 10 11 12 F01 surface M15 concrete 104 insulation G01 Gypsum board 27 26 26 26 26 26 26 27 28 29 30 31 L E k Tub 24 24 24 23 23 23 24 24 24 24 25 25 W/m- K rho G₁ W/m² 0 Kg/m³ 0 0 0 0 12 83 139 184 219 243 262 23 24 Table 4: Wall Data Time kJ/kg- K 13 14 15 16 17 18 19 20 21 22 Cp R (L/K) m². K/W 0.044 0.17 1.95 2242.58 0.92 0.07 0.05 19.22 0.96 0.01 0.16 800.92 1.09 T₂ (C) 32 32 32 32 32 31 30 29 29 28 27 27 R m². K/W U (1/R) W/m². K Tub 25 25 25 25 25 25 25 24 24 24 24 24 Gt W/m² 406 606 758 834 796 562 6 0 0 0 0 0 C (rho x Cp x L) kJ/m²-k N/ASee Answer
Q13:Table 2: Material properties, resistance, UA, and capacitance for each roof layer U (1/R) W/m2- с 25 F01 Outer Surface Resistance F13 Build-Up Roofing 4 cm Roofing Insulation 10 cm Concrete R5 Combined 10 cm Steel Joints 10 cm Airspace 20 mm Plaster Ceiling F03 Inside Horizontal Surface Resistance Total R R1 R2 R3 L k mm 9.5 0.16 28 W/m- с 40 rho Cp R C- kg/m³ kJ/kg- с m²/W 0.04 0.06 16.84 0.75 1,120 0.03 43 1.46 1.21 0.84 R4 R5 R5a 100 45.4 7,800 0.5 R5b 100 0.0251 1.2 R6 20 0.16 800 R7 100 0.53 1,280 1.004 1.05 1.33 0.19 5.30 0.18 5.56 0.12 8.33 0.18 5.56 0.13 8.00 0.16 6.25 XXX XXX с (tho*cp*L) kJ/m2-C 15.53 2.08 107.52 11.82 390.00 0.12 16.80 a. Determine the overall conductance of the roof. b. Use the thermal network approach to represent the transient response. Assume that all of the thermal storage is in the concrete and that the other roof elements have only a thermal resistance. Verify that the capacitance of the steel joists is negligible. c. Determine and plot the heat gain as a function of time over the course of the day d. Discuss how the HVAC system design is affected by energy storage in the concrete.See Answer
Q14:7.7 Area The air distribution system for a restaurant is being designed. The occupancy and cooling loads for the three main areas are given in the table. The cooling design loads are based on a design ambient of 95 F db and 78 F wb and a SLR of 0.7. These loads do not include the ventilation load. Occupancy Cooling load (Btu/hr) 120,000 40,000 30,000 Dining Bar Kitchen 150 20 4 a. Specify the set points, flow rates, and capacity of the air- conditioning systems. b. Draw some conclusions from your analysis.See Answer
Q15:7.5 An HVAC system is being designed to serve the interior and exterior zones of a small office building. The design occupancy is 25 for the interior zone and 40 for the exterior zone. The ambient design condition is 95 F and 70% relative humidity. The circulation flow rates are 4,000 cfm and 8,000 cfm for the interior and exterior zones, respectively. a. Specify the minimum and maximum zone setpoint temperatures that you would use in designing the system. Assume that the zone humidity will be about 50%. b. Determine the necessary ventilation airflow rates for the system and for each zone. C. Determine the ventilation load for the two levels of zone set temperature selected in b. d. Draw some conclusions from your analysis.See Answer
Q16:Instructions by student: Design a vapor-compression refrigeration system using r134a capable of cooling a space to a temperature of - 25 °C with a lifting capacity of 10 kW. The system must be able to reject heat to surroundings with a maximum temperature of 40 °C. The maximum pressure ratio across a compressor is 5 with an isentropic efficiency of 90%. Determine a) the heat rejected at the condenser and b) the refrigeration system's coefficient of performance (COP). Bonus, demonstrate you have developed a design which maximizes performance under the prescribed conditions (10 pts). In EEsSee Answer
Q17:5.17 A flow of 4000 cfm of air at 53 F and 95% RH enters the reheat coil of a building zone. The zone set temperature is 78 F and the zone sensible heat ratio (SHR) is 0.8. 1. Determine the maximum sensible and total load that can be met by the air flow and the room RH at the maximum load. 2. Determine the reheat energy that must be supplied to keep the zone at 78 as the sensible load is decreased from the maximum value to zero with the SHR remaining at 0.8. The flow rate, temperature, and humidity of the air supplied to the reheat coil remain the same.See Answer
Q18:5.10 SI A cooling coil with a bypass factor of 0.11 and a chilled water temperature of 12 C processes a flow of 3500 L/s. Determine the outlet state and the total, sensible and latent energy terms for entering conditions of 32 C and relative humidity between 10 and 90%.See Answer
Q19:5.7 For air-conditioning system operation in cold weather, it is possible to introduce enough outdoor air to eliminate cooling by the air conditioner. This is called an economizer, and the control strategy is to vary the amount of outdoor air entering a plenum so that the outlet state is at the set point. For zone conditions of 75 F and 50% RH and a constant circulating air flow rate of 25,000 cfm, determine the outdoor and return air flow rates necessary to maintain a 55 F supply air leaving the plenum. The outdoor air temperature varies between 10 F and 50 F and the relative humidity is always 30%.See Answer
Q20:5.5 A flow of 2000 cfm of moist outdoor air at 90 F and 70% RH mixes with a 1000 cfm stream of return air at 65 F and 20% RH. Determine the temperature, relative humidity, humidity ratio, and enthalpy of the mixed stream at sea level location.See Answer

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