Non-equilibrium sorption performances for composite sorbents of chlorides–ammonia working pairs for refrigeration |
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| Affiliation: | 1. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China;2. No. 704 Research Institute, China Shipbuilding Industry Corporation (CSIC), Shanghai 200031, China;1. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China;2. Sir Joseph Swan Centre for Energy Research, Newcastle University, Newcastle NE1 7RU, UK;1. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China;2. Sir Joseph Swan Centre for Energy Research, Newcastle University, Newcastle NE1 7RU, UK |
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| Abstract: | The sorption/desorption characteristics under the non-equilibrium conditions are extremely important for the refrigeration. The experimental test unit is set up, and the p–T–x curves of different working pairs are tested under the non-equilibrium working conditions. The results show that non-equilibrium sorption/desorption processes are related with dual variables rather than a single variable. Then we tested the isobaric sorption/desorption processes of chlorides. Results show that the hysteresis phenomena are related with the desorption enthalpy. Sorption/desorption dynamic models are studied. For sorption process the model is in accord with D-A equation, but for the desorption process both D-A equation and Spinner model should be considered. The Arrhenius equation is used to fit the relation between reaction heat and desorption hysteresis. The results show that the non-equilibrium equations fit the refrigeration performance well, whereas the theoretical equilibrium curves have big error. |
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