Modeling and numerical simulation of a novel solar-powered absorption air conditioning system driven by a bubble pump with energy storage |
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Authors: | Jia Qiu Jian Liang GuangMing Chen and RuXu Du |
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Institution: | (1) Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou, 310027, China;(2) Institute of Precision Engineering, The Chinese University of Hong Kong, Hong Kong, China |
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Abstract: | This paper presents a novel solar-powered absorption air conditioning system driven by a bubble pump with energy storage.
It solves the problem of unreliable solar energy supply by storing the working fluids and hence, functions 24 h per day. First,
the working principles are described and the dynamic models for the primary energy storage components are developed. Then,
the system is evaluated based on a numerical simulation. Based on the meteorological data of a typical day in a subtropical
area, with the area of a solar collector being set at 19.15 m2, whilst the initial charging mass, mass fraction and temperature of the solution are respectively set at 379.5 kg, 54.16%
and 34.5 °C, it is found that the respective coefficients of performance (COP) of the air conditioning system and the entire
system (including the solar panel) are 0.7771 and 0.4372. In particular, the energy storage density of the system is 206.69
MJ/m3 which is much greater than those of chilled water or hot water storage systems under comparable conditions. This makes the
new system much more compact and efficient. Finally, an automatic control strategy is given to achieve the highest COP when
solar energy fluctuates.
Supported by the Innovation and Technology Commission of Hong Kong and Aoyagi (H.K.) Ltd. (Grant No. UIM/122) |
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Keywords: | solar energy absorption air conditioning bubble pump energy storage modeling simulation |
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