Entransy transfer analysis methodology for energy conversion systems operating with thermodynamic cycles

Sheng-Zhi Xu and Zeng-Yuan Guo

Energy, 2021, vol. 224, issue C

Abstract: The entransy transfer analysis methodology proposed in this article offers an alternative novel approach of thermodynamic analysis for assessment and optimization of various energy conversion systems operating with thermodynamic cycles. It is proved that TdU entransy and TdH enthalpy-entransy are not state functions for thermodynamic systems with non-ideal gas substances, so the entransy transfer analysis methodology is constructed based on entransy process functions for generic thermodynamic systems. Accordingly, the thermodynamic evaluation indices of entransy (transfer) dissipation, cyclic net entransy transfer, and entransy (transfer) efficiency are defined. From the case studies of an organic Rankine cycle and a vapor-compression heat pump cycle, lower entransy (transfer) dissipation and higher entransy (transfer) efficiency can be adopted as the optimization objectives for heat engine and compression heat pump systems. Besides, lower cyclic net entransy transfer is preferred for thermal energy storage systems given the charging/discharging heat. The core difference between entransy transfer analysis and exergy (entropy) analysis is that entransy transfer highlights the heat transfer phenomenon, while exergy and entropy focus on the heat–work conversion phenomenon. Moreover, thermodynamic cycles can be classified into forward and reverse cycles in the sense of entransy transfer according to positive and negative cyclic net entransy transfer.

Keywords: Thermodynamic analysis; Entransy transfer; Process function; Energy conversion system; Thermodynamic cycle direction (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544221004382
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:energy:v:224:y:2021:i:c:s0360544221004382

DOI: 10.1016/j.energy.2021.120189

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

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