A comparative study of open and closed heat-engines for small-scale CHP applications

Eames, Ian W.; Evans, Kieran; Pickering, Stephen

Abstract

In this paper the authors compare and contrast open and closed-cycle heat engines. First of all, by way of example and to aid discussion, the performance of proprietary externally heated closed-cycle Stirling engines is compared with that of internally heated open Otto cycle engines. Both types of engine have disadvantages and merits and this suggested that in order to accommodate the best of both engine types an externally-heated open-cycle engine might offer a more satisfactory solution for small-scale combined heat and power (CHP) systems. To investigate this possibility further the paper goes on to compare the performance of externally-heated and recuperated Joule hot-air cycle engines with that of an externally-heated closed Stirling cycle engines. The results show that an externally heated recuperated open Joule cycle engine can exceed that of a closed cycle Stirling engine operating between the same heat source and sink temperatures when a variable temperature heat source is used.

Citation

Eames, I. W., Evans, K., & Pickering, S. (2016). A comparative study of open and closed heat-engines for small-scale CHP applications. Energies, 9(3), https://doi.org/10.3390/en9030130

• Journal Article Type: Article
• Acceptance Date: Feb 22, 2016
• Publication Date: Feb 25, 2016
• Deposit Date: Sep 6, 2017
• Publicly Available Date: Sep 6, 2017
• Journal: Energies
• Electronic ISSN: 1996-1073
• Publisher: MDPI
• Peer Reviewed: Peer Reviewed
• Volume: 9
• Issue: 3
• DOI: https://doi.org/10.3390/en9030130
• Keywords: Heat engine cycles; recuperated Joule cycle; Stirling cycle; thermodynamic performance; thermodynamic efficiency; combined heat and power
• Public URL: https://nottingham-repository.worktribe.com/output/775254
• Publisher URL: http://www.mdpi.com/1996-1073/9/3/130