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Experimental Comparison on Micro-Channel Evaporator in Room Air Conditioner Under Various Refrigerant Flow Directions(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2015年01期
Page:
21-24
Research Field:
热能工程
Publishing date:

Info

Title:
Experimental Comparison on Micro-Channel Evaporator in Room Air Conditioner Under Various Refrigerant Flow Directions
Author(s):
Fu Yu; Zhang Zhongbin; Huang Hu; Zhang Ruonan
Engineering Laboratory of Energy System Conversion and Emission Reduction of Jiangsu Province,School of Energy andMechanical Engineering,Nanjing Normal University,Nanjing 210042,China
Keywords:
refrigerant flow direction; micro-channel evaporator; room air conditioner; ambient temperature; infrared thermographs
PACS:
TB657.2
DOI:
-
Abstract:
Experimental comparison on the performance is conducted between Upward Flow(the refrigerant flows from down to up)and Downward Flow(the refrigerant flows from up to down)in a room air conditioner using micro-channel evaporator. Refrigerant distribution of nominal refrigeration condition in the micro-channels is made in infrared thermographs. Experimental results show that the cooling capacity and EER improve with the increase of ambient temperatures. Experimental results reveal a mean increase of 21.52% in cooling capacity and an increase of 14.94% in EER in the unit using UF model than that using DF model under nominal refrigeration condition. The infrared thermographs elaborate that UF model is superior to DF. However,refrigerant distribution in the latter tubes becomes worse,which deserves more effort.

References:

[1] Qi Zhaogang,Zhao Yu,Chen Jiangping. Performance enhancement study of mobile air conditioning system using microchannel heat exchangers[J]. International Journal of Refrigeration,2010,33(2):301-312.
[2]Spokoyny M,Trofimov V,Qiu X L,et al. Compact heat sink with combined structures of dimples-protrusions with pin-fins or microchannels:review,simulation and experimental data[C]// Proceedings of the ASME International Heat Transfer Conference. Washington DC,2010:481-493.
[3]Han Yanhui,Liu Yan,Li Ming,et al. A review of development of micro-channel heat exchanger applied in air-conditioning system[J]. Energy Procedia,2012(14):148-153.
[4]刘巍,朱春玲. 分流板开孔面积对微通道换热器流量分配的影响[J]. 流体机械,2014,42(1):6-10.
Liu Wei,Zhu Chunling. Flow distribution characteristics of deflector with different opening area[J]. Fluid Machinery,2014,42(1):6-10.(in Chinese)
[5]刘巍,朱春玲. 分流板结构对微通道平行流蒸发器性能的影响[J]. 化工学报,2012,63(3):761-766.
Liu Wei,Zhu Chunling. Effects of deflector structure on performance of micro-channel evaporator with parallel flow[J]. CIESC Journal,2012,63(3):761-766.(in Chinese)
[6]殷辉,刘斌,申志远. 微通道蒸发器在不同R404A充注量下的运行特性[J]. 低温工程,2013,193(3):58-62.
Yin Hui,Liu Bin,Shen Zhiyuan. Performance characteritics of microchannel evaporator with different R404A charge quantities[J]. Cryogenics,2013,193(3):58-62.(in Chinese)
[7]张忠斌,杜凯,黄虎,等. 制冷剂充注量对微通道蒸发器房间空调器性能影响的试验研究[J]. 东南大学学报:自然科学版,2014,44(3):1-6.
Zhang Zhongbin,Du Kai,Huang Hu,et al. Experimental study on the impact of refrigerant charge on room air conditioner performance equipped with micro-channel evaporator[J]. Journal of Southeast University:Natural Science Edition,2014,44(3):1-6.(in Chinese)
[8]Huang H,Li Q,Yuan D,et al. An experimental study on variable air volume operation of ducted air-conditioning with digital scroll compressor and conventional scroll compressor[J]. Applied Thermal Engineering,2008,28(7):761-766.

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Last Update: 2015-03-30