Experimental study on the performance of the vapor injection refrigeration system with an economizer for intermediate pressures
| Autor: | Sang-Young An, Chang-Hyo Son, Young-Bok Kim, Soo-Jung Ha, Chang-Uk Moon, Jung-In Yoon, Joon-Hyuk Lee, Min-Ju Jeon, Kwang-Hwan Choi |
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| Rok vydání: | 2018 |
| Předmět: |
Fluid Flow and Transfer Processes
Materials science 060102 archaeology 020209 energy Evaporation Thermodynamics Refrigeration 06 humanities and the arts 02 engineering and technology Coefficient of performance Condensed Matter Physics Subcooling Refrigerant Boiling point Economizer 0202 electrical engineering electronic engineering information engineering 0601 history and archaeology Gas compressor |
| Zdroj: | Heat and Mass Transfer. 54:3059-3069 |
| ISSN: | 1432-1181 0947-7411 |
| DOI: | 10.1007/s00231-018-2359-6 |
| Popis: | In this study, to investigate the performance characteristics of vapor injection refrigeration system with an economizer at an intermediate pressure, the vapor injection refrigeration system was analyzed under various experiment conditions. As a result, the optimum design data of the vapor injection refrigeration system with an economizer were obtained. The findings from this study can be summarized as follows. The mass flow rate through the compressor increases with intermediate pressure. The compression power input showed an increasing trend under all the test conditions. The evaporation capacity increased and then decreased at the intermediate pressure, and as such, it became maximum at the given intermediate pressure. The increased mass flow rate of the by-passed refrigerant enhanced the evaporation capacity at the low medium pressure range, but the increased saturation temperature limited the subcooling degree of the liquid refrigerant after the application of the economizer when the intermediate pressure kept rising, and degenerated the evaporation capacity. The coefficient of performance (COP) increased and then decreased with respect to the intermediate pressures under all the experiment conditions. Nevertheless, there was an optimum intermediate pressure for the maximum COP under each experiment condition. Therefore, the optimum intermediate pressure in this study was found at −99.08 kPa, which is the theoretical standard medium pressure under all the test conditions. |
| Databáze: | OpenAIRE |
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