The evaporator pressure of the vapor compression heat pump using R-134a as a refrigerant, which you are considering to buy in your home, is 6.45 bar and the condenser pressure is 15.94 bar. The heating requirement of your house in winter is 90 MJ/h and the compressor in the system works with 75% efficiency. The unit price of electricity is 0.9 TL/kWh, and that of natural gas is 0.35 TL/kWh. The efficiency of your existing gas fired combi boiler is 80%. Accordingly, whether the heat pump or your existing combi boiler will heat your house more economically, specify the reason. Also draw the T-S diagram for the heat pump. Indicate the locations of the compressor, condenser and evaporator with the points on the diagram.
The evaporator pressure of the vapor compression heat pump using R-134a as a refrigerant, which you are considering to buy in your home, is 6.45 bar and the condenser pressure is 15.94 bar. The heating requirement of your house in winter is 90 MJ/h and the compressor in the system works with 75% efficiency. The unit price of electricity is 0.9 TL/kWh, and that of natural gas is 0.35 TL/kWh. The efficiency of your existing gas fired combi boiler is 80%. Accordingly, whether the heat pump or your existing combi boiler will heat your house more economically, specify the reason. Also draw the T-S diagram for the heat pump. Indicate the locations of the compressor, condenser and evaporator with the points on the diagram.
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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Make unit conversions and necessary actions, get the right result
Transcribed Image Text:The evaporator pressure of the vapor compression heat pump using R-134a as a refrigerant, which
you are considering to buy in your home, is 6.45 bar and the condenser pressure is 15.94 bar. The
heating requirement of your house in winter is 90 MJ/h and the compressor in the system works with
75% efficiency. The unit price of electricity is 0.9 TL/kWh, and that of natural gas is 0.35 TL/kWh.
The efficiency of your existing gas fired combi boiler is 80%. Accordingly, whether the heat pump or
your existing combi boiler will heat your house more economically, specify the reason. Also draw the
T-S diagram for the heat pump. Indicate the locations of the compressor, condenser and evaporator
with the points on the diagram.
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