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陆 坤,李翠敏,孙志高,等. 双冷源空调机组供冷性能实验分析[J]. 科学技术与工程, 2020, 20(29): 12091-12096.
LU Kun,Li Cui-min,et al.Experimental study on cooling performance of double cooling source air conditioning unit[J].Science Technology and Engineering,2020,20(29):12091-12096.
双冷源空调机组供冷性能实验分析
Experimental study on cooling performance of double cooling source air conditioning unit
投稿时间:2019-11-06  修订日期:2020-06-24
DOI:
中文关键词:  双冷源空调机组  供冷能力  节能性  能效比
英文关键词:double  cooling source  air conditioning  unit cooling  capacity energy  saving energy  efficiency ratio
基金项目:国家自然科学基金(项目编号:61672371)
           
作者单位
陆 坤 School of Environmental Science and Engineering, Suzhou University of Science and Technology
李翠敏 苏州科技大学环境科学与工程学院
孙志高 苏州科技大学环境科学与工程学院
田向宁 浙江大学建筑设计研究院有限公司
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中文摘要:
      常规空调系统一般以冷凝除湿为主,之后需要再热才能满足送风温度要求,即浪费了冷量又消耗了再热的热量。为降低空调系统再热负荷,提出了双冷源空调机组。双冷源空调机组是在组合式空调机组中设置两个或多个表冷器,各表冷器可根据其功能采用低温冷源(如供回水7/12℃)和高温冷源(如供回水14/19℃)。为研究双冷源空调机组性能,试制了一种双冷源组合式空调机组,采用两组表冷器并联的形式组装。实验研究了高温表冷器的供冷能力、全热交换效率和除湿效率等变化规律,并分析了其供冷性能和节能性。结果表明,高温表冷器单独运行时,理想制冷效率显著提高,节能效果明显,送风温差可以满足室内要求,但除湿能力不足。两组表冷器联合运行通过合理设置表冷器的送风占比,完全可以满足空调系统送风要求,节约再热能量,达到节能的效果。在双冷源空调机组运行过程中,高温表冷器承担的负荷部分越大,系统的能效比EER就越大,节能效果越明显。
英文摘要:
      The conventional air conditioning system is mainly for condensation and dehumidification. After that, reheating is needed to meet the temperature requirements of air supply, which wastes the cooling capacity and reheat heat. In order to reduce the reheat load of air conditioning system, a double cooling source air conditioning unit is proposed. Two or more surface coolers are set in the double cooling source air conditioning unit. Each surface cooler adopts different evaporation temperature according to the needs, i.e. common low temperature cooling source of 7/12 ℃ for water supply and return and high-temperature cooling source of 9/14 ℃. In order to study the performance of double cooling source air conditioning unit, a new type of combined air conditioning unit with double cooling source is trial manufactured. In this work, to analysis the performance of the high-temperature comprehensively, the change law of the cooling capacity, total heat exchange efficiency and dehumidification efficiency of the high-temperature surface cooler is analyzed by experiment. And then the performance of the high-temperature and low-temperature surface coolers of the double cooling source air conditioning unit is studied by experiment under the working state of the high-temperature and low-temperature surface coolers running at the same time. The results show that when the high-temperature surface cooler is operated alone, the ideal refrigeration efficiency is significantly improved, the energy-saving effect is obvious, and the temperature difference of air supply can meet the indoor requirements, but the dehumidification capacity is insufficient. Meanwhile, the energy-saving effect of the double cooling source air conditioning unit is obvious, and the air supply proportion of the high temperature surface cooler is reasonably set, which can completely meet the air supply requirements. In addition, in the operation process of the double cooling source air conditioning unit, the larger the load part of the high-temperature surface cooler, the greater the system"s comprehensive energy efficiency ratio EER, and the greater the energy-saving effect.
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