摘要
为提高能源利用率并克服单一制冷技术的缺点,提出一种低品位能源驱动的新型复合制冷空调系统——太阳能制冷与露点蒸发冷却耦合空调系统。以南京某工程为例,分别计算露点蒸发冷却子系统和太阳能喷射制冷子系统的制冷量、耗电量、性能系数等参数。通过与间接蒸发冷却-喷射制冷空调系统的性能系数对比,发现新型复合系统的系统性能提升了6.38%,节约电能约6%。与传统机械式压缩制冷系统相比,该新型复合系统的性能系数提高70%以上,耗电量减少44%。对该复合系统的初投资和运行费用进行经济性分析,结果表明,该系统每年可节约476.5元,投资回收期约为6 a,兼顾经济性和环保性。
In order to improve energy efficiency and overcome the shortcomings of single refrigeration technology,a new type of composite refrigeration air-conditioning system driven by low grade energy is proposed:solar energy refrigeration and dew point evaporative cooling coupling air-conditioning system.Take a project in Nanjing as an example.The cooling capacity,power consumption and coefficient of performance of dew-point evaporative cooling subsystem and solar ejector refrigeration subsystem are calculated and analyzed respectively.By comparing the P cop with indirect evaporative cooling-ejector refrigeration air conditioning system,it is concluded that the system performance of the proposed system increases by 6.38%,and the energy saving is about 6%.Compared with the traditional mechanical compression refrigeration system,the P cop of the proposed system is increases by more than 70%and the power consumption is reduced by 44%.In the last part of this paper,the initial investment and operating cost of the composite system was analyzed,showing that the system can save 476.5 RMB annually,with a payback period of 6 years.It is economical and environmentally friendly.
作者
方凯乐
强天伟
宣永梅
FANG Kaile;QIANG Tianwei;XUAN Yongmei(School of Urban Planning and Municipal Engineering,Xi’an Polytechnic University,Xi’an 710048,China;School of Mechanical&Electrical and Engergy Engineering,Ningbo Institute of Technology,Zhejiang University,Ningbo 315100,Zhejiang,China)
出处
《西安工程大学学报》
CAS
2020年第2期52-59,共8页
Journal of Xi’an Polytechnic University
基金
国家自然科学基金(51706167)。
关键词
露点蒸发冷却
太阳能制冷
制冷量
耗电量
dew point evaporative cooling
solar refrigeration
cooling capacity
power consumption