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

Answer:

answered

Explanation:

The maximum possible efficiency is  

$\eta= 1-\frac{T_L}{T_H}$

$\eta= 1-\frac{295}{1175}$

= 0.7489

W_out= 28 KW

Q_in= 15000/3600= 41.67 KW

now

$\eta= \frac{W_out}{Q_H}$

$\eta= \frac{28}{41.67}$ =0.6791

which is less than $\eta_{max}$

claim is true