Problem $4(10$ points$)-$ Handling the Heat Rejected from a Power Plant

Consider a steam power plant that receives $900$ MW of heat and generates $300$ MW of electrical

power.

a$.$ What is the rate of heat rejection for this power plant?

b$.$ Consider the case that this heat is rejected into an air stream in a heat exchanger. The heat

exchanger uses local ambient air at $20^($@$)$C$,$ and the temperature of the air is only allowed to

increase $10^($@$)$C$.$ What is the minimum volumetric flow rate of the air at the heat exchanger

inlet? Specify your answer in m$^(3)//$s$.$

c$.$ Consider the case that this heat is rejected into a water stream in a heat exchanger. The

heat exchanger uses a local river supply at $20^($@$)$C$,$ and the temperature of the water is only

allowed to increase $2^($@$)$C$.$ What is the minimum volumetric flow rate of the water at the heat

exchanger inlet? Specify your answer in m$^(3)//$s$.$

d$.$ Fill in the blank, the minimum volumetric flow rate of air is

times greater than

the minimum volumetric flow rate of water? $($i$.$e$.$ what is the ratio of your answer in part b to

your answer in part c$).$ Problem $4(10$ points$)-$ Handling the Heat Rejected from a Power Plant

Consider a steam power plant that receives $900$ MW of heat and generates $300$ MW of electrical power.

a$.$ What is the rate of heat rejection for this power plant?

b$.$ Consider the case that this heat is rejected into an air stream in a heat exchanger. The heat exchanger uses local ambient air at $\backslash (20^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash ),$ and the temperature of the air is only allowed to increase $\backslash (10^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash ).$ What is the minimum volumetric flow rate of the air at the heat exchanger inlet? Specify your answer in $\backslash (\backslash$mathrm$\{$m$\}^\{3\}/\backslash$mathrm$\{$s$\}\backslash ).$

c$.$ Consider the case that this heat is rejected into a water stream in a heat exchanger. The heat exchanger uses a local river supply at $\backslash (20^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash ),$ and the temperature of the water is only allowed to increase $\backslash (2^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash ).$ What is the minimum volumetric flow rate of the water at the heat exchanger inlet? Specify your answer in $\backslash (\backslash$mathrm$\{$m$\}^\{3\}/\backslash$mathrm$\{$s$\}\backslash ).$

d$.$ Fill in the blank, the minimum volumetric flow rate of air is times greater than the minimum volumetric flow rate of water? $($i$.$e$.$ what is the ratio of your answer in part b to your answer in part c$).$