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After graduation, you take a job with the Acme energy services company. Your first job is to purchase high efficiency heat pumps. The heat pumps employ mechanical power and a heat engine to provide heat at TH = 100°C. A low temperature heat sink at TC = 20ºC is also available. A salesman shows you two models. Performance data for each model operating at steady state are provided in the Figure below

After graduation, you take a job with the Acme energy services company. Your first job is to purchase high efficiency heat pumps. The heat pumps employ mechanical power and a heat engine to provide heat at TH = 100°C. A low temperature heat sink at TC = 20ºC is also available. A salesman shows you two models. Performance data for each model operating at steady state are provided in the Figure below

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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After graduation, you take a job with the Acme energy services company. Your first job is to purchase high efficiency heat pumps. The heat pumps employ mechanical power and a heat engine to provide heat at TH = 100°C. A low temperature heat sink at TC = 20ºC is also available. A salesman shows you two models. Performance data for each model operating at steady state are provided in the Figure below

After graduation, you take a job with the Acme energy services company. Your first job is to purchase high efficiency heat pumps. The heat pumps employ mechanical power and a heat engine to provide heat at TH = 100°C. A low temperature heat sink at Tc = 20°C is also available. A salesman shows you two models. Performance data for each model operating at steady state are provided in the Figure below. TH= 100°C 500 W O 100 W 1000 W O 500 W external mechanical power Ic=20°C 500 W O 400 W 750 W 550 W TH= 100°C external mechanical power Tc = 20°C Model A Model B Figure: High efficiency heat pumps; Model A is on left and Model B is on the right. a.) What is the mechanical power that is needed to operate Model A? b.) What is the mechanical power needed to operate Model B? c.) What is the Coefficient of Performance (COP) for heating for Model A? d.) What is the COP for heating for Model B? e.) What is the maximum possible heating COP that can be obtained under these conditions? f.) Which heat pump system would you recommend that your company purchase (do you trust this salesperson)?
Transcribed Image Text:After graduation, you take a job with the Acme energy services company. Your first job is to purchase high efficiency heat pumps. The heat pumps employ mechanical power and a heat engine to provide heat at TH = 100°C. A low temperature heat sink at Tc = 20°C is also available. A salesman shows you two models. Performance data for each model operating at steady state are provided in the Figure below. TH= 100°C 500 W O 100 W 1000 W O 500 W external mechanical power Ic=20°C 500 W O 400 W 750 W 550 W TH= 100°C external mechanical power Tc = 20°C Model A Model B Figure: High efficiency heat pumps; Model A is on left and Model B is on the right. a.) What is the mechanical power that is needed to operate Model A? b.) What is the mechanical power needed to operate Model B? c.) What is the Coefficient of Performance (COP) for heating for Model A? d.) What is the COP for heating for Model B? e.) What is the maximum possible heating COP that can be obtained under these conditions? f.) Which heat pump system would you recommend that your company purchase (do you trust this salesperson)?
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