The temperatures recorded during the summer and winter in a particular locality are 45 C and 15
Question:
The temperatures recorded during the summer and winter in a particular locality are 45 C and 15 C respectively:
a. If air is used as a cooling medium having a temperature difference of 15 C, calculate the COP for heating and COP for cooling of the air-conditioning unit that corresponds to the refrigeration temperatures of 5 C for summer and heating temperature of 55 C for winter.
b. If water is used as a cooling medium instead of air, having a temperature difference of 10 C, calculate the COP for cooling, assuming that cooling water is from a reservoir at 30 C that serves as a cooling medium with a 3 C temperature differential for air-conditioning in summer.
c. compute the theoretical power consumption per ton of refrigeration when using air-cooled and water-cooled refrigeration systems.
d. calculate the percent savings in power when using a water-cooled instead of air-cooled refrigeration system
Thermodynamics An Engineering Approach
ISBN: 978-0073398174
8th edition
Authors: Yunus A. Cengel, Michael A. Boles