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Experiments on Expansion and Superheat Processes of a Co 2 Cycle Using Microchannel Evaporator
Experiments on expansion and superheat processes of a transcritical CO2 air conditioning system were done. In this study, the cross-sectional area of the expansion valve reduces from 8.195 to 0.091mm2, the cooler pressure increases and the evaporator pressure decreases; the pressure difference between cooler and evaporator increases. Besides, the power input of compressor increases as decreasing the crosssectional area.It is also observed that...
25 p hcmute 01/06/2018 537 2
Từ khóa: Experiment, CO 2 refrigerant, expansion, superheat, evaporator, microchannel
An Experiment on a CO Air Conditioning System with Copper Heat Exchangers 2
This paper presented an experiment on a CO air conditioning system with copper heat exchangers. In this study, the compressor and cooler were tested with hydraulic method to determine the deformed and torn temperatures. The results show that conventional compressor is not suitable for using high pressure, due to the COP of cycle is very low (0.5 only). With CO2 compressor, the cycle can achieved COP of 3.07 at the evaporative temperature of...
7 p hcmute 01/06/2018 492 2
Từ khóa: air conditioning system, heat exchanger, cooler, evaporator, CO refrigerant. 2
The investigation presented a numerical simulation on heat transfer behaviors in microchannel evaporator of a CO air conditioning system. The conditions for numerical simulation were applied by the experimental data of a CO 2 air conditioning cycle. This cycle worked with the cooler pressure of 85 bar, evaporator pressure of 37 bar, and the CO 2 flow rate of 5.2 g/s. The temperature and pressure in microchannels are uniform; they are suitable...
8 p hcmute 01/06/2018 422 1
Từ khóa: Numerical simulation, CO refrigerant, air conditioning system, heat transfer, evaporator
Experiments on expansion and superheat processes of a CO2 cycle using microchannel evaporator
Experiments on expansion and superheat processes of a transcritical CO2 air conditioning system were done. In this study, the cross-sectional area of the expansion valve reduces from 8.195 to 0.091 mm2, the cooler pressure increases and the evaporator pressure decreases; the pressure difference between cooler and evaporator increases
25 p hcmute 16/05/2018 402 1
Từ khóa: Experiment, CO refrigerant, expansion, superheat, evaporator, microchannel
The investigation presented a numerical simulation on heat transfer behaviors in microchannel evaporator of a CO2 air conditioning system. The conditions for numerical simulation were applied by the experimental data of a CO2 air conditioning cycle. This cycle worked with the cooler pressure of 85 bar, evaporator pressure of 37 bar, and the CO2 flow rate of 5.2 g/s.
8 p hcmute 16/05/2018 505 1
Từ khóa: Numerical simulation, CO refrigerant, air conditioning system, heat transfer, evaporator
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