Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4916093 | Applied Energy | 2017 | 13 Pages |
Abstract
Innovative modular sorption and resorption thermal cell are presented for cold and heat cogeneration. Expanded natural graphite treated with sulfuric acid is selected in the development of composite sorbents for improved heat and mass transfer performance. It is indicated that thermal conductivity and permeability range from 11.9 W mâ1 Kâ1 to 36.5 W mâ1 Kâ1 and from 1.04 Ã 10â14 m2 to 8.02 Ã 10â11 m2. Sorption characteristics of composite sorbents are also investigated. Results demonstrate that MnCl2-CaCl2-NH3 reveals the best sorption performance under the condition of 130-150 °C heat source temperature and â20 °C to 5 °C evaporation temperature. Sorption quantities of sorption and resorption working pairs range from 0.169 kg kgâ1 to 0.499 kg kgâ1. Based on testing results, energy density and power density of modular resorption thermal cell are compared with that of sorption thermal cell. Results indicate that heat density ranges from 580 kJ kgâ1 to 1368 kJ kgâ1 whereas cold density ranges from 400 kJ kgâ1 to 1134 kJ kgâ1. Simultaneously, heat and cold power density range from 322 W kgâ1 to 1502 W kgâ1 and from 222 W kgâ1 to 946 W kgâ1. Both sorption and resorption thermal cell have their own advantages, which are flexible connected for scaling applications.
Keywords
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Physical Sciences and Engineering
Energy
Energy Engineering and Power Technology
Authors
L. Jiang, A.P. Roskilly, R.Z. Wang, L.W. Wang, Y.J. Lu,