Optimization and performance experiments of a MnCl2/CaCl2–NH3 two-stage solid sorption freezing system for a refrigerated truck |
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| Affiliation: | 1. Institute of Refrigeration and Cryogenic, Key Laboratory of Power Machinery and Engineering of MOE, Shanghai Jiao Tong University, Shanghai 200240, China;2. CIMC Vehicles (Shan dong) CO., LTD, Jinan 250299, China;1. Institute of Refrigeration and Cryogenics, School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;2. Institute of Refrigeration and Cryogenics, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;3. School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang avenue, Singapore 639798, Singapore;1. School of Mechanical Engineering, Sungkyunkwan University, 300 Cheoncheon-dong, Suwon 16419, Republic of Korea;2. Korea Railroad Research Institute, 360-1 Woram-dong, Uiwang 16105, Republic of Korea;1. Sir Joseph Swan Centre for Energy Research, Newcastle University, Newcastle Upon Tyne, NE1 7RU, UK;2. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai, 200240, China |
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| Abstract: | Based on the earlier-established MnCl2/CaCl2–NH3 two-stage solid sorption freezing system for a refrigerated truck, a series of optimization designs are conducted in this prototype system. For sorption beds consisting of many unit tubes, the arrangement mode is changed to the staggered arrangement. Off-the-shelf heat exchangers from refrigeration industries are chosen as the evaporator and the condenser, and an expansion valve is also used. The total mass of the optimized system is reduced to approximately 150 kg. Firstly, different refrigerating temperatures ranging from ?25 °C to 0 °C are investigated, and experimental results show the optimized system can easily satisfy requirement even for transporting frozen goods. The earlier-established system can only satisfy requirement for transporting fresh goods. Simultaneously, the cycle time can be reduced to 45 min. Through the optimization, both the refrigerating capacity and the total mass of the system can satisfy requirement of this refrigerated truck. |
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