An ammonia heat engine has the following reversible steps: 1 ? 2 Isothermal heating of saturated...

An ammonia heat engine has the following reversible steps:

1 ? 2 Isothermal heating of saturated liquid @ 60°C to superheated vapor

2 ? 3 Adiabatic expansion to saturated vapor at -20°C

3 ? 4 Isothermal cooling to a 2 phase fluid

4 ? 1 Adiabatic compression back to state 1

Find QH (in kJ/kg). Use the correct sign convention to indicate the direction of heat. Hint: build a T-S diagram of the whole cycle first.

Expert Solution

Amanda K answered 2 years ago

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