Experimental research on the performance of the diffusion absorption refrigerator with mixed fluoride refrigerants |
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| Affiliation: | 1. Department of Energy and Power Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;2. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China;1. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China;2. Merchant Marine College, Shanghai Maritime University, Shanghai 201306, China;1. L2MSP, Department of Physics, University of Dschang, PO Box 67, Dschang, Cameroon;2. LISIE, University Institute of Technology Fotso Victor, University of Dschang, PO Box 134, Bandjoun, Cameroon;3. Department of Renewable Energy, Higher Technical Teachers’ Training College, University of Buea, PO Box 249, Buea Road, Kumba, Cameroon |
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| Abstract: | A diffusion absorption refrigerator (DAR) operating with mixed fluoride refrigerants was built to obtain low refrigerating temperature at low generating temperature. Two groups of mixed fluoride refrigerants, R23/R134a and R23/R32/R134a, were tested experimentally. The N,N-dimethylformamide (DMF) and helium were used as the absorbent and inert gas, respectively. For the DAR with R23/R134a, the refrigerating temperature was not obviously influenced by the concentration of R23 in the mixed refrigerant vapor or the amounts of helium. For the DAR with R23/R32/R134a, an optimal concentration of R32 in the mixed refrigerant vapor and an optimal pressure were both found to achieve the lowest refrigerating temperature which was −28.8 °C at a generating temperature of 106.9 °C, and a refrigerating temperature of −23.7 °C was obtained at an extraordinarily low generating temperature of 83.3 °C. It showed the promising potentials of DAR operating with mixed fluoride refrigerants in applications of low temperature refrigeration and efficient utilization of the low-grade thermal energy. |
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