Performance prediction of refrigerant-DMF solutions in a single-stage solar-powered absorption refrigeration system at low generating temperatures

Journal Article · Sun Nov 15 04:00:00 EST 2009 · Solar Energy

DOI:https://doi.org/10.1016/J.SOLENER.2009.08.001· OSTI ID:21236007

He, L J ^[1]; Tang, L M; Chen, G M ^[1]

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1. Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027 (China)

A theoretical analysis of the coefficient of performance was undertaken to examine the efficiency characteristics of R22 + DMF, R134a + DMF, R32 + DMF as working fluids, respectively, for a single-stage and intermittent absorption refrigerator which allows the use of heat pipe evacuated tubular collectors. The modeling and simulation of the performance considers both solar collector system and the absorption cooling system. The typical meteorological year file containing the weather parameters for Hangzhou is used to simulate the system. The results show that the system is in phase with the weather. In order to increase the reliability of the system, a hot water storage tank is essential. The optimum ratio of storage tank per solar collector area for Hangzhou's climate for a 1.0 kW system is 0.035-0.043L. Considering the relative low pressure and the high coefficient of performance, R134a + DMF mixture presents interesting properties for its application in solar absorption cycles at moderate condensing and absorbing temperatures when the evaporating temperatures in the range from 278 K to 288 K which are highly useful for food preservation and for air-conditioning in rural areas. (author)

• OSTI ID: 21236007
• Journal Information: Solar Energy, Journal Name: Solar Energy Journal Issue: 11 Vol. 83; ISSN 0038-092X; ISSN SRENA4
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
ABSORPTION REFRIGERATION CYCLE
AIR CONDITIONING
CHINA
COEFFICIENT OF PERFORMANCE
COOLING SYSTEMS
EFFICIENCY
FOOD
FORECASTING
HEAT
HOT WATER
PERFORMANCE
PRESERVATION
REFRIGERANTS
RELIABILITY
RURAL AREAS
Refrigerant-DMF
SIMULATION
SOLAR COLLECTORS
SOLAR REFRIGERATORS
SOLUTIONS
STORAGE
TANKS
Thermodynamic analysis
WEATHER