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Ammonia - carbon adsorption heat pump development.
Number: pap. n. 543
Author(s) : CRITOPH R., METCALF S., RIVERO PACHO A.
Summary
The overall objective of the research is to develop a domestic air source gas-fired heat pump to replace standard condensing boilers cost-effectively. The working pair is ammonia and active carbon. A succession of sorption generators have been prototyped, culminating in the 'kebab' design in which monolithic carbon is compressed between aluminum fins on a steel tube containing pressurized water that either heats or cools the adsorbent in a two-bed cycle with heat and mass recovery. A 10 kW system was built and tested. Initial results were poor with Coefficient of Performance (COP) a little above 1. This was due to mass transfer resistance in adsorption being too high, due to an excessive binder fraction. A new formulation has been tested in a single 'kebab' and the results are consistent with an internal COP of 1.40 when delivering 10 kW at 50°C and evaporating at 0°C or 1.34 when delivering 20 kW.
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Details
- Original title: Ammonia - carbon adsorption heat pump development.
- Record ID : 30026454
- Languages: English
- Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
- Publication date: 2019/08/24
- DOI: http://dx.doi.org/10.18462/iir.icr.2019.0543
Links
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Indexing
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Themes:
Residential heat-pumps;
Absorption and adsorption systems - Keywords: Generator; Finned tube; Ammonia; Adsorption; Activated carbon; Simulation; Domestic heat pump; Cost; COP
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