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Unformatted text preview: cost for the underground cooling loop for an interest rate of 12% and a lifetime of 25 years. 3. Consider an underground heat pump that serves a building with a heating load of 6.5 kW. Determine the volume of earth (in cubic yards) that must participate in the heating for a cooling period of 150 days and an allowable ground temperature drop of 15 C. The properties of the earth are estimated to be c P = 0.8 kJ/(kg K) = 1520 kg/m 3...
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 Spring '07
 SOMERTON

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