Next Article in Journal
Bumps on the Road to Here (from Eternity)
Next Article in Special Issue
Open Problems on Information and Feedback Controlled Systems
Previous Article in Journal
Interventionism in Statistical Mechanics
Previous Article in Special Issue
The Rate-Controlled Constrained-Equilibrium Approach to Far-From-Local-Equilibrium Thermodynamics
Article Menu

Export Article

Open AccessArticle
Entropy 2012, 14(2), 370-389; doi:10.3390/e14020370

Optimal Design of ORC Systems with a Low-Temperature Heat Source

Faculté de Génie, Université de Sherbrooke, Sherbrooke QC, J1K 2R1, Canada
*
Author to whom correspondence should be addressed.
Received: 5 December 2011 / Revised: 30 January 2012 / Accepted: 8 February 2012 / Published: 21 February 2012
(This article belongs to the Special Issue Advances in Applied Thermodynamics)
View Full-Text   |   Download PDF [399 KB, uploaded 24 February 2015]   |  

Abstract

A numerical model of subcritical and trans-critical power cycles using a fixed-flowrate low-temperature heat source has been validated and used to calculate the combinations of the maximum cycle pressure (Pev) and the difference between the source temperature and the maximum working fluid temperature (DT) which maximize the thermal efficiency (ηth) or minimize the non-dimensional exergy losses (β), the total thermal conductance of the heat exchangers (UAt) and the turbine size (SP). Optimum combinations of Pev and DT were calculated for each one of these four objective functions for two working fluids (R134a, R141b), three source temperatures and three values of the non-dimensional power output. The ratio of UAt over the net power output (which is a first approximation of the initial cost per kW) shows that R141b is the better working fluid for the conditions under study. View Full-Text
Keywords: waste heat; renewable energy; subcritical cycle; trans-critical cycle; R134a; R141b waste heat; renewable energy; subcritical cycle; trans-critical cycle; R134a; R141b
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Khennich, M.; Galanis, N. Optimal Design of ORC Systems with a Low-Temperature Heat Source. Entropy 2012, 14, 370-389.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Entropy EISSN 1099-4300 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top