Experimental Comparisons on Heat Transfer Characteristics of CO2 Air Conditioning System with an Internal Heat Exchanger and without an Internal Heat Exchanger Using Minichannel Evaporator
| Autor: | Thanhtrung Dang, Kimhang Vo, Tronghieu Nguyen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0209 industrial biotechnology
Materials science business.industry 02 engineering and technology Mechanics 010501 environmental sciences 01 natural sciences 020901 industrial engineering & automation Thermal expansion valve Air conditioning Heat transfer Mass flow rate business Internal heating Evaporator 0105 earth and related environmental sciences Bar (unit) |
| Zdroj: | 2019 International Conference on System Science and Engineering (ICSSE). |
| Popis: | This paper presented an experimental investigation on CO 2 air conditioning cycles using minichannel evaporator with an internal heat exchanger (cycle A) and without an internal heat exchanger (cycle B). The cycles were experimented under the ambient temperature around 31 °C. The pressure of system was adjusted by an expansion valve. The cooler pressure increases from 75 to 78 bar. The evaporator pressure decreases from 45 to 42 bar. The mass flow rate is around 113.4 kg/h. The results show that the temperature before expansion process of cycle A is lower than that obtained from the cycle B from 1 to 2 °C. Besides, the evaporator temperature of cycle A is lower than that obtained from the cycle B also. However, the COP of both cycles is approximately the same (COP 6.55). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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