Question

8. A ground source heat pump requires 7.7 kW of power to provide 9 tons of heat to a commercial hot water heating system. The coefficient of performance (COP) of this system is A. 4.1 B. 18 C. 2.9 D. 1.2 E. 3.7 Calculations: n yield much more useful energy from hydrogen fuel than combustion engines because A. they have fewer moving parts. B. they are not limited by Carnot's efficiency law. C. they operate at lower temperatures D. they are more durable. I cell produces 55 Amps at 0.7 volts, with an H2 flow rate of 0.40 nlpm. Calculate the thermal efficiency, based on HHV. Use HHV -285.8 kJ/mol, and recall that one mole of an ideal gas occupies 22.4 liters under Normal Conditions (T-0°C, P 1 Bar) A. 45% B. 23% C. 38% D. 52% Calculations:

Answer 1