Performance Optimization of a Large-Scale Ammonia Heat Pump in Off-Design Conditions

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Abstract

A thermodynamic model of a 5 MW test and demonstration heat pump, implemented in the district heating network of Copenhagen, is presented. A genetic algorithm was applied to the model for 27 different operating conditions, optimizing the system Coefficient of Performance (COP) by adjusting the available set points (SP) in the heat pump system. Analyzing the optimization result, new SP values depending on the operating conditions were proposed. The potential improvement in COP was between 0.4 % and 2.9 %. A performance map for all operating conditions was presented and discussed. In general the COP increased with decreasing forward temperatures, increasing source temperatures and further an optimum at 80 % heating load was observed within the investigated span of operating conditions.
Original languageEnglish
Title of host publicationProceedings of the 8th Conference on Ammonia and CO2 Refrigeration Technologies
PublisherInternational Institute of Refrigeration
Publication date2019
Pages107-114
ISBN (Electronic)978-236215034-0
DOIs
Publication statusPublished - 2019
Event8th conference on Ammonia and CO2 Refrigeration Technologies - Ohrid, Macedonia, The Former Yugoslav Republic of
Duration: 11 Apr 201913 Apr 2019
Conference number: 8
https://www.mf.ukim.edu.mk/web_ohrid2019/ohrid-2019.html

Conference

Conference8th conference on Ammonia and CO2 Refrigeration Technologies
Number8
CountryMacedonia, The Former Yugoslav Republic of
CityOhrid
Period11/04/201913/04/2019
Internet address
SeriesInstitut International du Froid. Bulletin
ISSN0020-6970

Bibliographical note

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

Keywords

  • Large-scale heat pump
  • District heating
  • COP
  • Off-design
  • Optimization

Cite this

Jørgensen, P. H., Ommen, T., Markussen, W. B., & Elmegaard, B. (2019). Performance Optimization of a Large-Scale Ammonia Heat Pump in Off-Design Conditions. In Proceedings of the 8th Conference on Ammonia and CO2 Refrigeration Technologies (pp. 107-114). International Institute of Refrigeration. Institut International du Froid. Bulletin https://doi.org/10.18462/iir.nh3-co2.2019.0014