数据中心用太阳能与热泵互补转轮除湿蒸发冷却系统性能研究

Study on the performence of solar energy and heat pump complementary drive desiccant wheel evaporative cooling air conditioning system in data center

针对数据中心蒸发冷却技术受限于环境湿球温度的问题,文章构建了一种太阳能与热泵互补转轮除湿蒸发冷却系统,该系统利用光伏组件发电余热提供的热能,与热泵系统互补驱动转轮除湿再生。系统根据室外气象条件可实现新风、蒸发冷却和除湿+蒸发冷却3种运行模式。应用TRNSYS软件模拟上海、广州和昆明3个典型地区数据中心的系统热力、电力及能耗特性。结果表明:在上海、广州和昆明地区典型日除湿+蒸发冷却模式下,转轮除湿预处理分别使空气湿球温度平均降低了10.9,11.6,10.3℃。在上海、广州和昆明地区典型月系统平均COP值分别为4.9,5.1,3.6,最大瞬时COP达到12.1,11.4,8.1。

In view of the problem that data center evaporative cooling technology limited by the ambient wet bulb temperature,a solar energy and heat pump complementary drive the desiccant wheel evaporative cooling air conditioning system in data center was proposed.The system uses the waste heat of photovoltaic modules to provide thermal energy complementary heat pump system to drive the dehumidification regeneration.According to the outdoor meteorological conditions,the system can realize three operation modes:fresh air,evaporative cooling and dehumidification&evaporative cooling.The TRNSYS software is used to simulate the thermal,power and energy consumption characteristics of the three typical regional data centers in Shanghai,Guangzhou and Kunming.The results show that in the typical daily dehumidification+evaporative cooling mode in Shanghai,Guangzhou and Kunming area,the desiccant wheel pretreatment reduced the air wet bulb temperature by 10.9℃,11.6℃ and 10.3℃ on average compared with the outdoor wet bulb temperature.The average typical monthly system COP values in Shanghai,Guangzhou and Kunming were 4.9,5.1 and 3.6,respectively,and the maximum instantaneous COP value was 12.1,11.4 and 8.1.