A heat pump is to be used to heat a house in winter and then reversed to cool the house in summer. The interior temperature is to be maintained at 20°C. Heat transfer through the walls and roof is 0.525 kJ/s per degree temperature difference between the inside and outside. (i) If the outside temperature in winter is 5°C, what is the minimum power required to drive the heat pump? (ii) For the same power input as part (i) find the heat transfer from room to maintain it's temperature at 20°C, if the atmospheric temperature is 50°C.
A heat pump is to be used to heat a house in winter and then reversed to cool the house in summer. The interior temperature is to be maintained at 20°C. Heat transfer through the walls and roof is 0.525 kJ/s per degree temperature difference between the inside and outside. (i) If the outside temperature in winter is 5°C, what is the minimum power required to drive the heat pump? (ii) For the same power input as part (i) find the heat transfer from room to maintain it's temperature at 20°C, if the atmospheric temperature is 50°C.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
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Transcribed Image Text:A heat pump is to be used to heat a house in winter and then reversed to cool the house in
summer. The interior temperature is to be maintained at 20°C. Heat transfer through the walls and
roof is 0.525 kJ/s per degree temperature difference between the inside and outside.
(i) If the outside temperature in winter is 5°C, what is the minimum power required to drive the
heat pump?
(ii) For the same power input as part (i) find the heat transfer from room to maintain it's
temperature at 20°C, if the atmospheric temperature is 50°C.
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