Thermodynamic analysis and economic assessment of a carbon dioxide hydrate-based vapor compression refrigeration system using load shifting controls in summer

Hua, N., Lu, T., Yang, L., Mckeown, A., Yu, Z. , Xu, B., Sciacovelli, A., Ding, Y. and Li, Y. (2022) Thermodynamic analysis and economic assessment of a carbon dioxide hydrate-based vapor compression refrigeration system using load shifting controls in summer. Energy Conversion and Management, 251, 114901. (doi: 10.1016/j.enconman.2021.114901)

Abstract

The present work proposed a novel two-stage carbon dioxide hydrate-based vapor-compression refrigeration system. The proposed system applied pure carbon dioxide hydrate as the primary refrigerant and arranged both of hydrate formation and dissociation at the low-pressure stage. The thermodynamic and economic models were developed and then performances of the proposed system using load-levelling storage and full storage operations were evaluated and compared with those of a conventional carbon dioxide single-stage vapor-compression refrigeration system, which is treated as the baseline and with no energy storage. The simulation results indicate that the design capacity of the proposed system using full storage is the largest among the three systems, but with lowest operation cost, and with the incentivization of electricity prices ratio of on and off-peak this cost savings would raise significantly. Noted that the bill structure reveals the load-levelling storage system saves most on the water consumption. Due to the dominant expenditure on the two compressors, compare with the baseline system, the initial capital cost of the full storage system was 75.5% higher, whereas that of the levelling-load storage system was only 21.5% higher. Finally, this paper discussed the economic feasibility on the initial capital cost for the proposed system and developed an indication map to predict the profit years in case of that the new system using load-levelling storage operation replaces the baseline system assuming a system lifetime of 15 years under different electricity prices ratios.

• Item Type: Articles
• Additional Information: The authors gratefully acknowledge the financial supports from the Engineering and Physical Sciences Research Council (EPSRC) of the UK (EP/T022701/1).
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Mckeown, Andrew and Yu, Professor Zhibin

Creator Roles

Mckeown, A.: Resources
Yu, Z.: Writing – review and editing

• Authors: Hua, N., Lu, T., Yang, L., Mckeown, A., Yu, Z., Xu, B., Sciacovelli, A., Ding, Y., and Li, Y.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Energy Conversion and Management
• Publisher: Elsevier
• ISSN: 0196-8904
• ISSN (Online): 2590-1745
• Published Online: 06 November 2021
• Copyright Holders: Copyright © 2021 Elsevier Ltd
• First Published: First published in Energy Conversion and Management 251:114901
• Publisher Policy: Reproduced in accordance with the publisher copyright policy