小管径内螺纹铜管在空调换热器上的应用分析
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摘要
主要针对小管径内螺纹铜管在空调换热器上的应用进行分析研究.分析管径小型化产生的直接经济效益,对换热和管内压降的影响;以及对空调换热器的内螺纹铜管称重分析.结果发现:相同长度的内螺纹铜管,Φ5mm比Φ9mm的材料成本至少减少55%,制冷剂充注量只是原来的26.6%;蒸发器和冷凝器的换热系数都随制冷剂质量流率的增大而增大,相同的质量流率下,Φ5mm内螺纹管的换热系数比Φ7mm的大,蒸发器的换热系数要比冷凝器的大;内螺纹管管径小型化,换热器制冷剂侧压降特别明显;在目前的空调换热器市场上,Φ5mm小管径内螺纹铜管并没有广泛应用,约占全部内螺纹铜管使用量的2.98%.
This paper mainly focuses on the application and analysis of small diameter inner screw copper tubes in air conditioning heat exchangers.Analysis of the direct economic benefits,effect of heat transfer and pressure drop in the tube generated by the small diameter;and weighing analysis of internal screw copper tube for air conditioner heat exchanger.Findings show that:The same length of the inner screw copper tube,the material costs of Φ5 mm than Φ9 mm reduce at least 55%,refrigerant charge is only 26.6% of the original;the heat transfer coefficients of the evaporator and condenser increase with the increase of the mass flow rate of the refrigerant,under the same mass flow rate,the heat transfer coefficient of the Φ5 mm inner screw tube is larger than that of 7 mm,and the heat transfer coefficient of the evaporator is larger than that of the condenser;the refrigerant pressure drop of heat exchanger is especially obvious generated by the small diameter;in the current market ofheat exchangers,small diameter inner screw copper tubes of Φ5 mm is not widely used,accounting for about 2.98% of total amount of use of inner screw copper tubes.
This paper mainly focuses on the application and analysis of small diameter inner screw copper tubes in air conditioning heat exchangers.Analysis of the direct economic benefits,effect of heat transfer and pressure drop in the tube generated by the small diameter;and weighing analysis of internal screw copper tube for air conditioner heat exchanger.Findings show that:The same length of the inner screw copper tube,the material costs of Φ5 mm than Φ9 mm reduce at least 55%,refrigerant charge is only 26.6% of the original;the heat transfer coefficients of the evaporator and condenser increase with the increase of the mass flow rate of the refrigerant,under the same mass flow rate,the heat transfer coefficient of the Φ5 mm inner screw tube is larger than that of 7 mm,and the heat transfer coefficient of the evaporator is larger than that of the condenser;the refrigerant pressure drop of heat exchanger is especially obvious generated by the small diameter;in the current market ofheat exchangers,small diameter inner screw copper tubes of Φ5 mm is not widely used,accounting for about 2.98% of total amount of use of inner screw copper tubes.
引文
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[15]王君,史欣.热交换用铜合金管市场分析[J].中国金属通报,2011,19:40-41.
[2]胡海涛,丁国良,黄翔超,等.小管径铜管内含油制冷剂流动冷凝换热和压降特性的实验研究[J].制冷技术,2012,32(2):1-5.
[3]任滔,丁国良,韩维哲,等.空调器中采用小管径的影响分析及研发思路[J].制冷技术,2012(1):49-52,67.
[4]吴极,王瑾,王哲旻,等.管径变化对蒸发器性能影响的仿真与实验研究[J].制冷学报,2015,36(6):104-110.
[5]吴扬,李长生,邓斌.采用小管径铜管空冷换热器的性能成本分析研究[J].制冷技术,2010(2):19-21,25.
[6]尤顺义,张静,林灿洪,等.在小管径内螺纹铜管在空调系统中的应用[J].制冷技术,2010(2):22-25.
[7]苏顺玉,张春枝,陈俭.家用空调换热器内充注量的研究[J].建筑热能通风空调,2008,27(5):39-41.
[8]李进军,吴峰.绿色化学导论[M].湖北:武汉大学出版社,2015.
[9]冼志健,王开发.小管径换热铜管的性能及成本分析[J].2013,13(5):65-66.
[10]杨世铭,陶文铨.传热学[M].上海:高等教育出版社,1999.
[11]刘洋,王芳,杜世春,等.R410A空调器系统的实验研究[J].制冷,2005(4):20-23.
[12]胡海涛.R410A-润滑油混合物管内流动沸腾换热和压降特性的研究[D].上海:上海交通大学,2008.
[13]郑贤德.制冷原理与装置[M].北京:机械工业出版社,2008.
[14]程建,陶乐仁,魏义平,密洁霞,郑志皋,黄理浩,张庆刚.R410和R22在一种内螺纹强化管管内蒸发性能研究[J].流体机械,2013,41(3):54-57.
[15]王君,史欣.热交换用铜合金管市场分析[J].中国金属通报,2011,19:40-41.