Exploring a potential application of hydrate separation for composition adjustable combined cooling and power system

Yue Zhang, Shuai Deng, Li Zhao, Xianhua Nie, Weicong Xu and Junnan He

Applied Energy, 2020, vol. 268, issue C, No S0306261920305766

Abstract: At present stage, the thermodynamic perfection of cycles in the field of medium and low temperature heat is generally below 40%, and this poses a challenge in improving the efficiency of thermodynamic cycles. Therefore, exploring the energy-conversion potential of thermodynamic cycles becomes an urgent question to be addressed. In this study, the concept of hydrate regulating working fluid composition is first proposed, and a novel composition adjustable combined cooling and power system based on hydrate is studied. The separation work of regulating working fluid composition could be utilized in the form of hydrate formation/dissociation enthalpy. This system could realize the optimal match between the working fluids and the thermodynamic processes. Besides, the novel system could meet the demand of cooling and electricity demands. When R22/R32 mixture is employed as working fluid, the second law efficiency of the composition adjustable combined cooling and power system based on hydrate is 0.57, while the second law efficiency of pure working fluids (R22 or R32) systems is 0.48. Compared to the traditional pure working fluid systems, the second law efficiency could be increased up to 21.26% in the novel system. The performance of the novel system and traditional pure working fluid systems under different heat sources are also compared, the results show that performance of the novel system is still better than that of traditional pure working fluid systems. This study could provide a new solution for offshore energy demand.

Keywords: Combined cooling and power; Organic Rankine cycle; Composition adjustable; Zeotropic mixtures; Clathrate hydrate; Hydrate separation (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (8)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306261920305766
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:268:y:2020:i:c:s0306261920305766

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

DOI: 10.1016/j.apenergy.2020.115064

Access Statistics for this article

Applied Energy is currently edited by J. Yan

More articles in Applied Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().