Question

(Power Cycle)​ Your new boss announces at a team meeting that she has developed atechnology that will perform a power cycle that operates between hot and cold reservoirs at 902 °C and 22 °C that produces a power output of 28 kW while receiving 150,000 kJ/hof energy via heat transfer from the hot reservoir. You are suspicious that this cyclesounds too good to be true, so you decide to check. What do you find

Answer 1

answered

Step-by-step explanation:

The maximum possible efficiency is

`\eta= 1-(T_L)/(T_H)`

`\eta= 1-(295)/(1175)`

= 0.7489

W_out= 28 KW

Q_in= 15000/3600= 41.67 KW

now

`\eta= (W_out)/(Q_H)`

`\eta= (28)/(41.67)` =0.6791

which is less than
`\eta_(max)`

claim is true