Generalized COP estimation of heat pump processes for operation off the design point of equipment

Torben Ommen; Jonas K. Jensen; Wiebke Meesenburg; Pernille H. Jørgensen; Henrik Pieper; Wiebke B. Markussen; Brian Elmegaard

doi:10.18462/iir.icr.2019.0648

Generalized COP estimation of heat pump processes for operation off the design point of equipment

Torben Ommen^*, Jonas K. Jensen, Wiebke Meesenburg, Pernille H. Jørgensen, Henrik Pieper, Wiebke B. Markussen, Brian Elmegaard

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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Abstract

Heat pumps (HPs) and their individual components experience a significant share of operation away from the design point, due to both sink and source temperature variations as well as operation at part load. In the present study, we expand a generalized HP COP estimation for design conditions to include the performance of conditions within the typical limits for the operating range. The estimation was compared to results based on detailed thermodynamic models of two representative HP installations, of different size and design temperatures. The considered configurations include a 14 kW R134a one-stage cycle and an 800 kW two-stage ammonia heat pump. Based on the design point COP estimation, and five linearized off-design contributions, the performance estimation of COP showed a maximum deviation of 8 %.

Original language	English
Title of host publication	Proceedings of the 25th IIR International Congress of Refrigeration
Number of pages	8
Publisher	International Institute of Refrigeration
Publication date	2019
Article number	648
DOIs	https://doi.org/10.18462/iir.icr.2019.0648
Publication status	Published - 2019
Event	25th IIR International Congress of Refrigeration (ICR 2019) - Montréal , Canada Duration: 24 Aug 2019 → 30 Aug 2019

Conference

Conference	25th IIR International Congress of Refrigeration (ICR 2019)
Country	Canada
City	Montréal
Period	24/08/2019 → 30/08/2019

Bibliographical note

Copyright © IIF/IIR.
Published with the authorization of the International Institute of Refrigeration (IIR): www.iifiir.org

Keywords

Heat pumps
Compressors
COP estimation
Performance modelling

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Ommen, T., Jensen, J. K., Meesenburg, W., Jørgensen, P. H., Pieper, H., Markussen, W. B., & Elmegaard, B. (2019). Generalized COP estimation of heat pump processes for operation off the design point of equipment. In Proceedings of the 25th IIR International Congress of Refrigeration [648] International Institute of Refrigeration. https://doi.org/10.18462/iir.icr.2019.0648

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title = "Generalized COP estimation of heat pump processes for operation off the design point of equipment",

abstract = "Heat pumps (HPs) and their individual components experience a significant share of operation away from the design point, due to both sink and source temperature variations as well as operation at part load. In the present study, we expand a generalized HP COP estimation for design conditions to include the performance of conditions within the typical limits for the operating range. The estimation was compared to results based on detailed thermodynamic models of two representative HP installations, of different size and design temperatures. The considered configurations include a 14 kW R134a one-stage cycle and an 800 kW two-stage ammonia heat pump. Based on the design point COP estimation, and five linearized off-design contributions, the performance estimation of COP showed a maximum deviation of 8 %.",

keywords = "Heat pumps, Compressors, COP estimation, Performance modelling",

author = "Torben Ommen and Jensen, {Jonas K.} and Wiebke Meesenburg and J{\o}rgensen, {Pernille H.} and Henrik Pieper and Markussen, {Wiebke B.} and Brian Elmegaard",

note = "Copyright {\textcopyright} IIF/IIR. Published with the authorization of the International Institute of Refrigeration (IIR): www.iifiir.org; 25th IIR International Congress of Refrigeration (ICR 2019) ; Conference date: 24-08-2019 Through 30-08-2019",

year = "2019",

doi = "10.18462/iir.icr.2019.0648",

language = "English",

booktitle = "Proceedings of the 25th IIR International Congress of Refrigeration",

publisher = "International Institute of Refrigeration",

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Ommen, T , Jensen, JK , Meesenburg, W , Jørgensen, PH, Pieper, H, Markussen, WB & Elmegaard, B 2019, Generalized COP estimation of heat pump processes for operation off the design point of equipment. in Proceedings of the 25th IIR International Congress of Refrigeration., 648, International Institute of Refrigeration, 25th IIR International Congress of Refrigeration (ICR 2019), Montréal , Canada, 24/08/2019. https://doi.org/10.18462/iir.icr.2019.0648

Generalized COP estimation of heat pump processes for operation off the design point of equipment. / Ommen, Torben ; Jensen, Jonas K.; Meesenburg, Wiebke ; Jørgensen, Pernille H.; Pieper, Henrik; Markussen, Wiebke B.; Elmegaard, Brian.

Proceedings of the 25th IIR International Congress of Refrigeration. International Institute of Refrigeration, 2019. 648.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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T1 - Generalized COP estimation of heat pump processes for operation off the design point of equipment

AU - Ommen, Torben

AU - Jensen, Jonas K.

AU - Meesenburg, Wiebke

AU - Jørgensen, Pernille H.

AU - Pieper, Henrik

AU - Markussen, Wiebke B.

AU - Elmegaard, Brian

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N2 - Heat pumps (HPs) and their individual components experience a significant share of operation away from the design point, due to both sink and source temperature variations as well as operation at part load. In the present study, we expand a generalized HP COP estimation for design conditions to include the performance of conditions within the typical limits for the operating range. The estimation was compared to results based on detailed thermodynamic models of two representative HP installations, of different size and design temperatures. The considered configurations include a 14 kW R134a one-stage cycle and an 800 kW two-stage ammonia heat pump. Based on the design point COP estimation, and five linearized off-design contributions, the performance estimation of COP showed a maximum deviation of 8 %.

AB - Heat pumps (HPs) and their individual components experience a significant share of operation away from the design point, due to both sink and source temperature variations as well as operation at part load. In the present study, we expand a generalized HP COP estimation for design conditions to include the performance of conditions within the typical limits for the operating range. The estimation was compared to results based on detailed thermodynamic models of two representative HP installations, of different size and design temperatures. The considered configurations include a 14 kW R134a one-stage cycle and an 800 kW two-stage ammonia heat pump. Based on the design point COP estimation, and five linearized off-design contributions, the performance estimation of COP showed a maximum deviation of 8 %.

KW - Heat pumps

KW - Compressors

KW - COP estimation

KW - Performance modelling

U2 - 10.18462/iir.icr.2019.0648

DO - 10.18462/iir.icr.2019.0648

M3 - Article in proceedings

BT - Proceedings of the 25th IIR International Congress of Refrigeration

PB - International Institute of Refrigeration

T2 - 25th IIR International Congress of Refrigeration (ICR 2019)

Y2 - 24 August 2019 through 30 August 2019

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