太阳能驱动的膜式除湿系统能量匹配研究
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摘要
定义溶液冷却与加热过程的能量匹配系数,分析得到该系数受除湿与再生侧溶液流量比的影响较大,而受太阳能加热器出水温度和冷却水流量的影响小。增加除湿与再生侧的溶液流量比,降低太阳能加热器出水温度,增大冷却水流量,同时调控3个参数可使系统的能量供需平衡。通过中国南方典型湿热气候条件实例分析,得出整个系统的能量达到匹配时的参数,系统的性能得到有效提高,为系统的实际运行提供指导。
In this research,the index of energy matching is defined to evaluate the energy matching of the solar energy driven membrare-based liquid desicant system. It is greatly affected by the solution flow ratio of dehumidification to regeneration,but less affected by the outlet temperature of solar collector and the cooling water flow rate. The capacity matching can be achieved by increasing the solution flow ratio of dehumidification to regeneration,decreasing the outlet temperature of solar collector and increasing the cooling water flow rate. The optimal parameters are obtained as the supply and demand of energy is well matched both in the dehumidification and regeneration processes under the typical weather conditions in hot and humid Southern China. They are helpful for the system performance improvement.
In this research,the index of energy matching is defined to evaluate the energy matching of the solar energy driven membrare-based liquid desicant system. It is greatly affected by the solution flow ratio of dehumidification to regeneration,but less affected by the outlet temperature of solar collector and the cooling water flow rate. The capacity matching can be achieved by increasing the solution flow ratio of dehumidification to regeneration,decreasing the outlet temperature of solar collector and increasing the cooling water flow rate. The optimal parameters are obtained as the supply and demand of energy is well matched both in the dehumidification and regeneration processes under the typical weather conditions in hot and humid Southern China. They are helpful for the system performance improvement.
引文
[1]江亿,李震,陈晓阳,等.溶液除湿空调系列文章——溶液式空调及其应用[J].暖通空调,2004,34(11):88—97.[1] Jiang Yi, Li Zhen, Chen Xiaoyang, et al. Liquid desiccant air conditioning and independent humidity control air conditioning systems,2004,34(11):88—97.
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[3] Fumo N,Goswami D Y. Study of an aqueous lithium chloride desiccant system:air dehumidification and desiccant regeneration[J]. Solar Energy,2002,72(4):351—361.
[4] Oberg V,Goswami D Y. A review of liquid desiccant cooling[J]. Advances in Solar Energy,1998,12:431—470.
[5] Grossman G. Solar-powered systems for cooling,dehumidification and air-conditioning[J]. Solar Energy,2002,72(1):53—62.
[6] Zhang Lizhi. Progress on heat and moisture recovery with membranes:From fundamentals to engineering applications[J]. Energy Conversion and Management,2012,63:173—195
[7] Zhang Lizhi. Coupled heat and mass transfer in an application-scale cross-flow hollow fiber membrane module for air humidification[J]. International Journal of Heat and Mass Transfer,2012,55(21-22):5861—5869
[8] Li Guopei,Zhang Lizhi. Investigation of a solar energy driven and hollow fiber membrane-based humidificationdehumidification desalination system[J]. Applied Energy,2016,177:393—408.
[9] Niu Xiaofeng,Fu Xiao,Ma Zhenjun. Investigation on capacity matching in liquid desiccant and heat pump hybrid air-conditioning systems[J]. International Journal of Refrigeration,2012,35(1):160—170.
[10]张晴原,杨洪兴.建筑用标准气象数据手册[M].北京:中国建筑工业出版社,2012.[10] Zhang Qingyuan, Yang Hongxing. Typical meteorological database hand book for buildings[M].Beijing:China Architecture&Building Press,2012.
[11] Zhang Lizhi,Zhang Ning. A heat pump driven and hollow fiber membrane-based liquid desiccant air dehumidification system:Modeling and experimental validation[J]. Energy,2014,65:441—451
[12] GB 50019—2003.采暖通风与空调调节设计规范[M].北京:中国计划出版社,2004.[12] GB 50019—2003. Code for design of heating ventilation and air conditioning[M]. Beijing:China Planning Press,2004.
[2] Mei Lin,Dai Yanjun. A technical review on use of liquid desiccant dehumidification for air-conditioning application[J]. Renewable&Sustainable Energy Reviews,2008,12(3):662—689.
[3] Fumo N,Goswami D Y. Study of an aqueous lithium chloride desiccant system:air dehumidification and desiccant regeneration[J]. Solar Energy,2002,72(4):351—361.
[4] Oberg V,Goswami D Y. A review of liquid desiccant cooling[J]. Advances in Solar Energy,1998,12:431—470.
[5] Grossman G. Solar-powered systems for cooling,dehumidification and air-conditioning[J]. Solar Energy,2002,72(1):53—62.
[6] Zhang Lizhi. Progress on heat and moisture recovery with membranes:From fundamentals to engineering applications[J]. Energy Conversion and Management,2012,63:173—195
[7] Zhang Lizhi. Coupled heat and mass transfer in an application-scale cross-flow hollow fiber membrane module for air humidification[J]. International Journal of Heat and Mass Transfer,2012,55(21-22):5861—5869
[8] Li Guopei,Zhang Lizhi. Investigation of a solar energy driven and hollow fiber membrane-based humidificationdehumidification desalination system[J]. Applied Energy,2016,177:393—408.
[9] Niu Xiaofeng,Fu Xiao,Ma Zhenjun. Investigation on capacity matching in liquid desiccant and heat pump hybrid air-conditioning systems[J]. International Journal of Refrigeration,2012,35(1):160—170.
[10]张晴原,杨洪兴.建筑用标准气象数据手册[M].北京:中国建筑工业出版社,2012.[10] Zhang Qingyuan, Yang Hongxing. Typical meteorological database hand book for buildings[M].Beijing:China Architecture&Building Press,2012.
[11] Zhang Lizhi,Zhang Ning. A heat pump driven and hollow fiber membrane-based liquid desiccant air dehumidification system:Modeling and experimental validation[J]. Energy,2014,65:441—451
[12] GB 50019—2003.采暖通风与空调调节设计规范[M].北京:中国计划出版社,2004.[12] GB 50019—2003. Code for design of heating ventilation and air conditioning[M]. Beijing:China Planning Press,2004.