Experimental comparison between R409A and R437A performance in a heat pump unit
| Autor: | Duarte, Miguel Vicente, Pires, Luís Carlos Carvalho, Silva, Pedro Dinho da, Gaspar, Pedro Dinis |
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| Přispěvatelé: | uBibliorum |
| Rok vydání: | 2017 |
| Předmět: |
Heat pump
Environmental Engineering Energetic performance 020209 energy Mechanical Engineering R409A Aerospace Engineering 02 engineering and technology Mechanics Engineering (General). Civil engineering (General) Unit (housing) law.invention Exergetic study law 0202 electrical engineering electronic engineering information engineering R437A Environmental science General Materials Science TA1-2040 Electrical and Electronic Engineering Civil and Structural Engineering |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) Agência para a Sociedade do Conhecimento (UMIC)-FCT-Sociedade da Informação instacron:RCAAP Open Engineering, Vol 7, Iss 1, Pp 77-90 (2017) |
| ISSN: | 2391-5439 |
| DOI: | 10.1515/eng-2017-0011 |
| Popis: | This paper reports an experimental comparison between the use of the refrigerants R409A and R437A in a heat pump unit designed and developed to work with R12. Although the use of both refrigerants in new equipments were abolished in EU and US according the new F-Gas Regulation of EU and SNAP, they still being used as options for R12 in old equipments, especially in developing countries. Both refrigerants were studied for the same test conditions, according to two groups of tests: group A (variation of the heat source temperature) and group B (variation of refrigerant flow rate). The results obtained showed that the R437A presents a higher discharge pressure and a lower discharge temperature. The heating and cooling capacities of both refrigerants were similar, as well as the exergetic efficiency. For the group A of tests the COP of both refrigerants was similar and for the group B of tests the R409A presented an average COP 15% higher. According to the results obtained it is recommended the use of R409A in old equipments (as transition refrigerant) until the acquisition of equipments operating with refrigerants with low-GWP becomes technically and economic feasible. |
| Databáze: | OpenAIRE |
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