IIR document
On the development of high temperature ammonia–water hybrid absorption–compression heat pumps.
Author(s) : JENSEN J. K., MARKUSSEN W. B., REINHOLDT L., et al.
Type of article: Article, IJR article
Summary
Ammonia–water hybrid absorption–compression heat pumps (HACHP) are a promising technology for development of efficient high temperature industrial heat pumps. Using 28 bar components HACHPs up to 100°C are commercially available. Components developed for 50 bar and 140 bar show that these pressure limits may be possible to exceed if needed for actual applications. Feasible heat supply temperatures using these component limits are investigated. A feasible solution is defined as one that satisfies constraints on the COP, low and high pressure, compressor discharge temperature, vapour water content and volumetric heat capacity. The ammonia mass fraction and the liquid circulation ratio both influence these constraining parameters. The paper investigates feasible combinations of these parameters through the use of a numerical model. 28 bar components allow temperatures up to 111°C, 50 bar up to 129°C, and 140 bar up to 147°C. If the compressor discharge temperature limit is increased to 250°C and the vapour water content constraint is removed, this becomes: 182°C, 193°C and 223°C.
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Details
- Original title: On the development of high temperature ammonia–water hybrid absorption–compression heat pumps.
- Record ID : 30015671
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 58
- Publication date: 2015/10
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High temperature absorption compression heat pu...
- Author(s) : REINHOLDT L., HORNTVEDT B., NORDTVEDT S. R., et al.
- Date : 2016/08/21
- Languages : English
- Source: 12th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2016). Proceedings. Édimbourg, United Kingdom, August 21st-24th 2016.
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Compressors for ammonia-water hybrid absorption...
- Author(s) : AHRENS M. U., HAFNER A., EIKEVIK T. M.
- Date : 2019/04/11
- Languages : English
- Source: 8th Conference on Ammonia and CO2 Refrigeration Technology. Proceedings: Ohrid, North Macedonia, Avril 11-13, 2019.
- Formats : PDF
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Development of ammonia-water hybrid absorption-...
- Author(s) : AHRENS M. U., HAFNER A., EIKEVIK T. M.
- Date : 2019/08/24
- Languages : English
- Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
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Modelling approach for a liquid-injected ammoni...
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- Date : 2021/01/13
- Languages : English
- Source: 10th IIR Conference on Compressors and Refrigerants.
- Formats : PDF
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