[1] Cao Rongquan, Zhang Xiaosong, Yin Yonggao,. Performance analysis on a novel water chiller using liquid desiccant [J]. Journal of Southeast University (English Edition), 2010, 26 (2): 192-196. [doi:10.3969/j.issn.1003-7985.2010.02.010]
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Performance analysis on a novel water chiller using liquid desiccant(
)
一种新型溶液除湿冷水机组性能分析
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 26
- Issue:
- 2010 2
- Page:
- 192-196
- Research Field:
- Energy and Power Engineering
- Publishing date:
- 2010-06-30
Info
- Title:
- Performance analysis on a novel water chiller using liquid desiccant
- 一种新型溶液除湿冷水机组性能分析
- Author(s):
- Cao Rongquan; Zhang Xiaosong; Yin Yonggao
- School of Energy and Environment, Southeast University, Nanjing 210096, China
- Keywords:
- liquid desiccant; water chiller; coefficient of perfor-mance; low-grade energy utilization
- PACS:
- TU831.6
- DOI:
- 10.3969/j.issn.1003-7985.2010.02.010
- Abstract:
- A new type of liquid desiccant water chiller for applications on air-conditioning and refrigeration is introduced.The system can be driven by low-grade heat sources with temperatures of 60 to 80 ℃, which can be easily obtained by a flat plat solar collector, waste heat, etc.A numerical model is developed to study the system performance.The effects of different parameters on performance are discussed, including evaporating temperature, regenerating temperature, ambient condition, and mass flow rates of closed moist air and regenerating air.The results show that an acceptable performance of a cooling capacity of 2.5 kW and a coefficient of performance of 0.37 can be achieved in a reference case.The regenerating temperature and the humidity ratios of ambient air are two main factors affecting system performance, while the temperature of ambient air functions less.In addition, the mass flow rate of regenerating air and closed moist air should be carefully determined for economical operation.
- 介绍了一种应用于制冷空调领域的新型溶液除湿冷水机组, 该系统可以由60~80 ℃的低品位热能驱动, 如太阳能平板集热、余热废热等.对该系统建立了数学模型, 理论分析了蒸发温度、再生温度、环境空气温湿度、封闭制冷循环和再生循环空气流量等参数对系统性能的影响.结果表明:系统在参考工况下制冷量为2.5 kW, 性能系数达0.37, 制冷性能良好;再生温度和环境空气含湿量对系统制冷量和性能系数的影响较大, 而环境空气温度的影响较小;同时, 为了使得系统能够经济运行, 再生空气流量不宜过大, 而封闭制冷循环空气的流量也需要合理选择.
References:
[1] Al-Farayedhi A, Gandhidasan P, Antar M A, et al.Experimental study of hybrid liquid desiccant based vapor compression cooling system [C]//The 6th Saudi Engineering Conference.Dhahran, Saudi Arabia, 2002:503-515.
[2] Gommed K, Grossman G.Experimental investigation of a liquid desiccant system for solar cooling and dehumidification [J].Solar Energy, 2007, 81(1):131-138.
[3] Katejanekarn T, Kumar S.Performance of a solar-regenerated liquid desiccant ventilation pre-conditioning system [J].Energy and Buildings, 2008, 40(7):1252-1267.
[4] Tu Min, Ren Chengqin, Zhang Longai, et al.Simulation and analysis of a novel liquid desiccant air-conditioning system [J].Applied Thermal Engineering, 2009, 29(11/12):2417-2425.
[5] Yin Yonggao, Zhang Xiaosong, Jiang Yi.Construction and research on a refrigeration system based on liquid desiccant potential discharging [J].Journal of Refrigeration, 2006, 27(5):26-30.(in Chinese)
[6] Yin Yonggao, Zhang Xiaosong.A new method for determining coupled heat and mass transfer coefficients between air and liquid desiccant [J].International Journal of Heat and Mass Transfer, 2008, 51(13/14):3287-3297.
[7] Liu Xiaohua, Jiang Yi, Xia Jiajun, et al.Analytical solutions of coupled heat and mass transfer processes in liquid desiccant air dehumidifier/regenerator [J].Energy Conversion and Management, 2007, 48(7):2221-2232.
[8] Conde M R.Properties of aqueous solutions of lithium and calcium chlorides:formulations for use in air conditioning equipment design [J].International Journal of Thermal Sciences, 2004, 43(4):367-382.
Memo
- Memo:
-
Biographies: Cao Rongquan(1984—), male, graduate;Zhang Xiaosong(corresponding author), male, doctor, professor, rachpe@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.50976021), the National Key Technology R& D Program of China during the 11th Five-Year Plan Period(No.2007BA000875).
Citation: Cao Rongquan, Zhang Xiaosong, Yin Yonggao.Performance analysis on a novel water chiller using liquid desiccant[J].Journal of Southeast University(English Edition), 2010, 26(2):192-196.