3 1 pt effectiveness factor and ntu chart for heat exchangers figure 2
3. (1 pt) Effectiveness Factor and NTU Chart for Heat Exchangers
Figure 22.23 (c) in Welty et al. is a graph of effectiveness factor (a) vs. the number of transfer units (NTU)
for different ratios Cmin/Cmax- Note that & 73% for Cmin/Cmax = 0.25 and NTU = 2. Suppose that
Cmin is then doubled (e.g., by doubling the mass flow rate of the fluid with lower capacity coefficient C.
What is the new & if Cmax A and U are unchanged?
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