Experimental investigation of a MnCl2/CaCl2-NH3 two-stage solid sorption freezing system for a refrigerated truck

P. Gao, L.W. Wang, R.Z. Wang, X.F. Zhang, D.P. Li, Z.W. Liang and A.F. Cai

Energy, 2016, vol. 103, issue C, 16-26

Abstract: A MnCl2/CaCl2-NH3 two-stage solid sorption freezing system consisting of a MnCl2 sorption bed, a CaCl2 sorption bed, an evaporator and a condenser is established for a refrigerated truck, for which the required refrigerating capacity is 1.13 kW at a refrigerating temperature of −5 °C. Composite adsorbents of MnCl2 and CaCl2 developed by expanded natural graphite treated with sulfuric acid are utilized. The sorption/desorption process and the resorption process are coupled in the two-stage cycle. The experimental results show that the maximum refrigerating capacity of 1.25 kW and COP (coefficient of performance) of 0.143 are obtained at a resorption time of 120 min when the hot air and refrigerating temperatures are 230 °C and −5 °C, respectively. In addition, the refrigerating capacity of 1.19 kW is achieved even when the hot air temperature is as low as 210 °C, and such a result can satisfy the requirement for transporting fresh goods. The refrigerating capacity is 1.32 kW when the hot air and refrigerating temperatures are 270 °C and −10 °C, respectively, and the data are higher than the required refrigerating capacity. However, for refrigerating temperatures of −15 °C and −18 °C, the refrigerating capacity experimentally obtained could meet the requirement only when a truck is utilized for long-distance transportation.

Keywords: Solid sorption freezing system; Two-stage; Composite adsorbent; Refrigerated truck; Exhaust heat (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (11)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:103:y:2016:i:c:p:16-26

DOI: 10.1016/j.energy.2016.02.145

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