EXERCISE

$6\mathrm{.}17\mathrm{.}28$: $($Problem $5\mathrm{.}28$ in the $9$th edition$).$

A power cycle operates between hot and cold reservoirs at $600$ K and $300$ K $,$ respectively. At steady state the cycle develops a power output of $0\mathrm{.}45$ MW while receiving energy by heat transfer from the hot reservoir at the rate of $1$ MW $.$

$($a$)$ Determine the thermal efficiency and the rate at which energy is rejected by heat transfer to the cold reservoir, in MW$.$

$($b$)$ Compare the results of part $($a$)$ with those of a reversible power cycle operating between these reservoirs and receiving the same rate of heat transfer from the hot reservoir.

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