Liang, Y., Sun, Z., Dong, M., Lu, J. and Yu, Z. (2020) Investigation of a refrigeration system based on combined supercritical CO2 power and transcritical CO2 refrigeration cycles by waste heat recovery of engine. International Journal of Refrigeration, 118, pp. 470-482. (doi: 10.1016/j.ijrefrig.2020.04.031)
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Abstract
The majority of the energy in the fuel burned in the internal combustion engines is lost in the form of waste heat. To address this issue, waste heat recovery technology has been proposed to increases the overall efficiency of engine. This paper investigates a heat driven cooling system based on a supercritical CO2 (S-CO2) power cycle integrated with a transcritical CO2 (T-CO2) refrigeration cycle, aiming to provide an alternative to the vapour absorption cooling system. The combined system is proposed to produce cooling for food preservation on a refrigerated truck by waste heat recovery of engine. In this system, the S-CO2 absorbs heat from the exhaust gas and the generated power in the expander is used to drive the compressors in both S-CO2 power cycle and T-CO2 refrigeration cycle. Unlike the bulky vapour absorption cooling system, both power plant and vapour compression refrigerator can be scaled down to a few kilo Watts, opening the possibility for developing small-scale waste heat driven cooling system that can be widely applied for waste heat recovery from IC engines of truck, ship and trains.A new layout sharing a common cooler is also studied. The results suggest that the concept of S-CO2/T-CO2 combined cycle sharing a common cooler has comparable performance and it is thermodynamically feasible. The heat contained in exhaust gas is sufficient for the S-CO2/T-CO2 combined system to provide enough cooling for refrigerated truck cabinet whose surface area is more than 105 m2.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Liang, Dr Youcai and Yu, Professor Zhibin |
| Authors: | Liang, Y., Sun, Z., Dong, M., Lu, J., and Yu, Z. |
| College/School: | College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Journal Name: | International Journal of Refrigeration |
| Publisher: | Elsevier |
| ISSN: | 0140-7007 |
| ISSN (Online): | 1879-2081 |
| Published Online: | 16 May 2020 |
| Copyright Holders: | Copyright © 2020 The Authors |
| First Published: | First published in International Journal of Refrigeration 118: 470-482 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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