Influence of the source and sink temperatures on the optimal refrigerant charge of a water-to water heat pump
| Autor: | Rafael Royo-Pastor, José Gonzálvez-Maciá, José M. Corberán, I.O. Martínez-Galvan, Santiago Martínez-Ballester |
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| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Chiller
Optimization Phase transition Materials science Heat pump systems Evaporation Thermodynamics Distribution Charge Modelling Pumps law.invention Refrigerant chemistry.chemical_compound Propane law Refrigerating machinery Heat pump Mathematical models Mathematical model Refrigerants Mechanical Engineering Building and Construction Oil chemistry Solubility Phase transitions MAQUINAS Y MOTORES TERMICOS Gas compressor |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname |
| ISSN: | 2008-0670 |
| Popis: | [EN] This paper presents the results of a study carried out to elucidate the influence of the source and sink temperatures on the optimal charge of a propane water-to-water 16 kW heat pump which does not incorporate any liquid receiver. The unit had been fully tested along a previous experimental study, at various refrigerant charges and different condensing temperatures. A detailed mathematical model was then employed to simulate the unit performance. The predicted results were in very good agreement with the experiments, and furthermore, showed the same trends found in a similar unit tested at the KTH (Sweden) when the evaporation temperature was progressively decreased. Then, the model was employed to study the influence of the source and sink temperatures on the optimal charge of the unit. The simulation showed that the great variation of the optimal charge with the variation of the evaporation temperature is mainly due to the variation of the amount of refrigerant in the compressor oil. © 2010 Elsevier Ltd and IIR. All rights reserved. This research has been partially funded by the Spanish Ministry for Science and Innovation (MICINN) through the project "Estudio de optimizacion de equipos frigorificos y de aire acondicionado para su funcionamiento con refrigerantes naturales hidrocarburos" with reference DPI2008-06707-C02-01. The authors gratefully acknowledge their financial support. |
| Databáze: | OpenAIRE |
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