Thermodynamic analysis of a system converted from heat pump to refrigeration device
| Autor: | Hadi Ghasemi Zavaragh, Omer Comakli, Faraz Afshari, Sendogan Karagoz |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Fluid Flow and Transfer Processes
Work (thermodynamics) Materials science 020209 energy Nuclear engineering Refrigerator car Refrigeration 02 engineering and technology Energy consumption Condensed Matter Physics law.invention Refrigerant 020401 chemical engineering law 0202 electrical engineering electronic engineering information engineering 0204 chemical engineering Energy source Gas compressor Heat pump |
| Zdroj: | Heat and Mass Transfer. 55:281-291 |
| ISSN: | 1432-1181 0947-7411 |
| DOI: | 10.1007/s00231-018-2412-5 |
| Popis: | In this study, an existing laboratory heat pump is converted to a refrigeration unit in order to evaluate efficiency, power consumption, pressure and temperature variations and optimal charge amount of the system in new mode using refrigerant R-407C. Refrigerant charge amount has a key role in the terms of performance, operating cost (regarding to the charge reduction and energy consumption) and environmental concerns in all heat pump and refrigeration systems, which work on the same principles. Heat pump charge amount is the subject of many research, but less studies have been done in the case of refrigerators and freezers where the system works in the transient condition, on the contrary to the heat pump units. Although this study has been devoted to a detailed attempt to examine the possibility of converting the heat pump into the refrigerator, energy aspects of the whole system and the compressor have been analyzed under different working conditions. In the installed setup, the COP value of the system is tested with charge amount between 1 kg and 7 kg, but obtained results show that, this value is so lower than that of heat pump unit due to restricted energy source in cooling chamber. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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