逆流式露点间接蒸发冷却器性能实验研究
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摘要
本文研发了一种新型逆流式露点间接蒸发冷却器,并对其冷却性能进行实验研究。在焓差实验室内模拟干燥地区、中等湿度地区、高湿地区等多种工况条件,对该冷却器的湿球效率、露点效率、制冷量等进行测试分析。结果表明:在标准干燥工况(干球温度38℃,湿球温度23℃),二次空气/一次空气风量比=1.1条件下,该冷却器湿球效率可达105.6%,露点效率可达76%,制冷量为2.83 kW,干球温度温降可达15.2℃。模拟乌鲁木齐工况与标准干燥环境工况的实验结果表明,露点间接蒸发冷却技术在我国西北炎热干燥地区具有极大的优越性和广阔的应用前景。
A new countercurrent dew-point indirect evaporative cooler was developed, and its cooling performance was experimentally studied in this work. The wet-bulb efficiency, dew-point efficiency, and refrigerating capacity of the cooler were tested and analyzed under various working conditions simulating dry area, moderate-humidity area, and high-humidity area in an enthalpy-difference laboratory. The experimental results show that the wet-bulb efficiency reached 105.6% and the dew-point efficiency reached 76% under standard drying conditions(dry-bulb temperature 38 ℃ and wet-bulb temperature 23 ℃) and air-flow ratio of secondary air/primary air=1.1. The refrigerating capacity was tested as 2.83 kW, and the dry-bulb temperature decrease of the cooler reached 15.2 ℃. By the experimental results simulating the working conditions of Urumqi and standard dry environment, the dew-point indirect evaporative cooling technology shows many advantages and broad application prospects in the hot and dry areas in northwestern China.
A new countercurrent dew-point indirect evaporative cooler was developed, and its cooling performance was experimentally studied in this work. The wet-bulb efficiency, dew-point efficiency, and refrigerating capacity of the cooler were tested and analyzed under various working conditions simulating dry area, moderate-humidity area, and high-humidity area in an enthalpy-difference laboratory. The experimental results show that the wet-bulb efficiency reached 105.6% and the dew-point efficiency reached 76% under standard drying conditions(dry-bulb temperature 38 ℃ and wet-bulb temperature 23 ℃) and air-flow ratio of secondary air/primary air=1.1. The refrigerating capacity was tested as 2.83 kW, and the dry-bulb temperature decrease of the cooler reached 15.2 ℃. By the experimental results simulating the working conditions of Urumqi and standard dry environment, the dew-point indirect evaporative cooling technology shows many advantages and broad application prospects in the hot and dry areas in northwestern China.
引文
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[2] PANDELIDIS D, ANISIMOV S, WOREK W M. Performance study of counter-flow indirect evaporative air coolers[J]. Energy & Buildings, 2015, 109:53-64.
[3] ZHAN Changhong, ZHAO Xudong, SMITH S, et al. Numerical study of a M-cycle cross-flow heat exchanger for indirect evaporative cooling[J]. Building & Environment, 2011, 46(3):657-668.
[4] ZHAN Changhong, DUAN Zhiyin, ZHAO Xudong, et al. Comparative study of the performance of the M-cycle counter-flow and cross-flow heat exchangers for indirect evaporative cooling—Paving the path toward sustainable cooling of buildings[J]. Energy, 2011, 36(12):6790-6805.
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[6] DUAN Zhiyin, ZHAN Changhong, ZHAO Xudong, et al. Experimental study of a counter-flow regenerative evaporative cooler[J]. Building & Environment, 2016, 104:47-58.
[7] CUI Xin, CHUA K J, ISLAM M R, et al. Performance evaluation of an indirect precooling evaporative heat exchanger operating in hot and humid climate[J]. Energy Conversion & Management, 2015, 102:140-150.
[8] XU Peng, MA Xiaoli, ZHAO Xudong, et al. Experimental investigation on performance of fabrics for indirect evaporative cooling applications[J]. Building & Environment, 2016, 110:104-114.
[9] XU Peng, MA Xiaoli, DIALLO T M O, et al. Numerical investigation of the energy performance of a guideless irregular heat and mass exchanger with corrugated heat transfer surface for dew point cooling[J]. Energy, 2016, 109:803-817.
[10] XU Peng, MA Xiaoli, ZHAO Xudong, et al. Experimental investigation of a super performance dew point air cooler[J]. Applied Energy, 2017, 203: 761-777.
[11] 刘佳莉,黄翔,韩正林,等. 干燥工况下新型复合式露点间接蒸发冷却空调机组的试验研究[J]. 流体机械,2015,43(3):52-57.(LIU Jiali,HUANG Xiang,HAN Zhenglin,et al. Experimental study of a novel combined dew point indirect evaporative air conditioning uint under dry condition[J]. Fluid Machinery, 2015,43(3):52-57.)
[12] 张强,郝玉涛,杨双,等. 露点间接蒸发冷却技术的研究进展及现状分析[J]. 制冷与空调(北京), 2010, 10(1):17-22.(ZHANG Qiang,HAO Yutao,YANG Shuang,et al. Research progress and present situation analysis of dew point indirect evaporative cooling technology[J]. Refrigeration and Air-conditioning,2010, 10(1):17-22.)
[13] 王玉刚.新型露点蒸发冷却系统理论与实验研究[D]. 西安:西安建筑科技大学,2015.(WANG Yugang. Theoretical and experimental study on a novel dew point evaporative cooling system[D]. Xi′an: Xi′an University of Architecture and Technology, 2015.)
[14] 王玉刚,王怡,黄翔,等. 一种新型露点间接蒸发冷却器在我国不同气候区适用性的试验研究[J]. 流体机械,2015,43(8):68-72,58.(WANG Yugang,WANG Yi,HUANG Xiang,et al. Experimental study of a new type dew point indirect evaporative cooler on the applicability of different climate zones in china[J]. Fluid Machinery, 2015,43(8):68-72,58.)
[15] 狄育慧,刘加平,黄翔.蒸发冷却空调应用的气候适应性区域划分[J]. 暖通空调,2010,40(2):108-111.(DI Yuhui,LIU Jiaping,HUANG Xiang. Climate demarcating for application of evaporative cooling air conditioning [J]. Journal of HV & AC, 2010,40(2):108-111.)
[16] 民用建筑供暖通风与空气调节设计规范: GB 50736—2012[S].北京:中国建筑工业出版社,2012.(Design code for heating ventilation and air conditioning of civil buildings: GB 50736—2012[S]. Beijing:China Architecture & Building Press,2012.)
[17] 蒸发式冷气机: GB/T 25860—2010[S]. 北京:中国标准出版社,2010.(Evaporative air cooler: GB/T 25860—2010[S]. Beijing:Standards Press of China,2010.)
[2] PANDELIDIS D, ANISIMOV S, WOREK W M. Performance study of counter-flow indirect evaporative air coolers[J]. Energy & Buildings, 2015, 109:53-64.
[3] ZHAN Changhong, ZHAO Xudong, SMITH S, et al. Numerical study of a M-cycle cross-flow heat exchanger for indirect evaporative cooling[J]. Building & Environment, 2011, 46(3):657-668.
[4] ZHAN Changhong, DUAN Zhiyin, ZHAO Xudong, et al. Comparative study of the performance of the M-cycle counter-flow and cross-flow heat exchangers for indirect evaporative cooling—Paving the path toward sustainable cooling of buildings[J]. Energy, 2011, 36(12):6790-6805.
[5] DUAN Zhiyin. Investigation of a novel dew point indirect evaporative air conditioning system for buildings[D]. Nottingham: University of Nottingham, 2011.
[6] DUAN Zhiyin, ZHAN Changhong, ZHAO Xudong, et al. Experimental study of a counter-flow regenerative evaporative cooler[J]. Building & Environment, 2016, 104:47-58.
[7] CUI Xin, CHUA K J, ISLAM M R, et al. Performance evaluation of an indirect precooling evaporative heat exchanger operating in hot and humid climate[J]. Energy Conversion & Management, 2015, 102:140-150.
[8] XU Peng, MA Xiaoli, ZHAO Xudong, et al. Experimental investigation on performance of fabrics for indirect evaporative cooling applications[J]. Building & Environment, 2016, 110:104-114.
[9] XU Peng, MA Xiaoli, DIALLO T M O, et al. Numerical investigation of the energy performance of a guideless irregular heat and mass exchanger with corrugated heat transfer surface for dew point cooling[J]. Energy, 2016, 109:803-817.
[10] XU Peng, MA Xiaoli, ZHAO Xudong, et al. Experimental investigation of a super performance dew point air cooler[J]. Applied Energy, 2017, 203: 761-777.
[11] 刘佳莉,黄翔,韩正林,等. 干燥工况下新型复合式露点间接蒸发冷却空调机组的试验研究[J]. 流体机械,2015,43(3):52-57.(LIU Jiali,HUANG Xiang,HAN Zhenglin,et al. Experimental study of a novel combined dew point indirect evaporative air conditioning uint under dry condition[J]. Fluid Machinery, 2015,43(3):52-57.)
[12] 张强,郝玉涛,杨双,等. 露点间接蒸发冷却技术的研究进展及现状分析[J]. 制冷与空调(北京), 2010, 10(1):17-22.(ZHANG Qiang,HAO Yutao,YANG Shuang,et al. Research progress and present situation analysis of dew point indirect evaporative cooling technology[J]. Refrigeration and Air-conditioning,2010, 10(1):17-22.)
[13] 王玉刚.新型露点蒸发冷却系统理论与实验研究[D]. 西安:西安建筑科技大学,2015.(WANG Yugang. Theoretical and experimental study on a novel dew point evaporative cooling system[D]. Xi′an: Xi′an University of Architecture and Technology, 2015.)
[14] 王玉刚,王怡,黄翔,等. 一种新型露点间接蒸发冷却器在我国不同气候区适用性的试验研究[J]. 流体机械,2015,43(8):68-72,58.(WANG Yugang,WANG Yi,HUANG Xiang,et al. Experimental study of a new type dew point indirect evaporative cooler on the applicability of different climate zones in china[J]. Fluid Machinery, 2015,43(8):68-72,58.)
[15] 狄育慧,刘加平,黄翔.蒸发冷却空调应用的气候适应性区域划分[J]. 暖通空调,2010,40(2):108-111.(DI Yuhui,LIU Jiaping,HUANG Xiang. Climate demarcating for application of evaporative cooling air conditioning [J]. Journal of HV & AC, 2010,40(2):108-111.)
[16] 民用建筑供暖通风与空气调节设计规范: GB 50736—2012[S].北京:中国建筑工业出版社,2012.(Design code for heating ventilation and air conditioning of civil buildings: GB 50736—2012[S]. Beijing:China Architecture & Building Press,2012.)
[17] 蒸发式冷气机: GB/T 25860—2010[S]. 北京:中国标准出版社,2010.(Evaporative air cooler: GB/T 25860—2010[S]. Beijing:Standards Press of China,2010.)
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