A heat pump cycle is used to maintain the interior of a building at 15°C. At steady state, the heat pump receives energy by heat transfer from well water at 9°C and discharges energy by heat transfer to the building at a rate of 120,000 kJ/h. Over a period of 14 days, an electric meter records that 2000 kW.h of electricity is provided to the heat pump. Determine: (a) the amount of energy that the heat pump receives over the 14-day period from the well water by heat transfer, in kJ. (b) the heat pump's coefficient of performance. 4 (c) the coefficient of performance of a reversible heat pump cycle operating between hot and cold reservoirs at 15°C and 9°C.
A heat pump cycle is used to maintain the interior of a building at 15°C. At steady state, the heat pump receives energy by heat transfer from well water at 9°C and discharges energy by heat transfer to the building at a rate of 120,000 kJ/h. Over a period of 14 days, an electric meter records that 2000 kW.h of electricity is provided to the heat pump. Determine: (a) the amount of energy that the heat pump receives over the 14-day period from the well water by heat transfer, in kJ. (b) the heat pump's coefficient of performance. 4 (c) the coefficient of performance of a reversible heat pump cycle operating between hot and cold reservoirs at 15°C and 9°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
Problem 1.1P
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Transcribed Image Text:A heat pump cycle is used to maintain the interior of a building at 15°C. At steady state, the heat pump receives energy by heat
transfer from well water at 9°C and discharges energy by heat transfer to the building at a rate of 120,000 kJ/h. Over a period of 14
days, an electric meter records that 2000 kWh of electricity is provided to the heat pump.
Determine:
(a) the amount of energy that the heat pump receives over the 14-day period from the well water by heat transfer, in kJ.
(b) the heat pump's coefficient of performance.
(c) the coefficient of performance of a reversible heat pump cycle operating between hot and cold reservoirs at 15°C and 9°C.
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