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6 pts #2) Natural disasters often require emergency medical care. A mobile medical unit is shown with the air-conditioner powered by a small (6 kW output) engine. Pressurized tanks hold

88 kg of propane to fuel the engine. Propane releases 50,000 kJ of thermal energy per kilogram of fuel burned. The air-conditioner and engine operate steadily to provide a cooling rate of 22 kJ/s to maintain the mobile hospital at a constant 20 °C with the outdoor temperature above 37 °C. The thermal efficiency of the power cycle is 30%. Find the COP of the Air-Conditioner (a refrigeration cycle) =______ Find the total rate of waste heat rejected to the environment = _______ Find the steady running time on 1 tank of fuel =________.

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