Power, efficiency, ecological function and ecological coefficient of performance optimizations of irreversible Diesel cycle based on finite piston speed

Heng Wu, Yanlin Ge, Lingen Chen and Huijun Feng

Energy, 2021, vol. 216, issue C

Abstract: By connecting the finite time thermodynamics and the finite speed thermodynamics, an irreversible reciprocating Diesel cycle model is established with considering the irreversibilities caused by finite piston speed, heat transfer, friction, and internal irreversible loss. Through numerical calculations, the relationships among net power output (P), thermal efficiency (η), ecological function (E), ecological coefficient of performance (ECOP) and compression ratio (γ), piston speed and piston speed ratio are analyzed. As it is shown in the results, the relation curves of P−γ, η−γ, E−γ, ECOP−γcharacteristics of the cycle are parabolic ones, and those of P−ηand E−ηcharacteristics of the cycle are loop-shaped ones. When piston speed ratio is a constant, the maximum net power output increases, the maximum ecological function first increases and then decreases, the maximum thermal efficiency and the maximum ecological coefficient of performance both decrease with the increase of piston speed. When piston speed is a constant, the maximum net power output and the maximum ecological function both first increase and then decrease, and the maximum thermal efficiency and maximum ecological coefficient of performance both decrease with the increase of piston speed ratio.

Keywords: Finite-time thermodynamics; Finite speed thermodynamics; Irreversible Diesel cycle; Power output and thermal efficiency; Ecological function; Ecological coefficient of performance (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/S0360544220323422
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:216:y:2021:i:c:s0360544220323422

DOI: 10.1016/j.energy.2020.119235

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 ().