Working fluid selection for a subcritical bottoming cycle applied to a high exhaust gas recirculation engine

Angad S. Panesar, Robert E. Morgan, Nicolas D.D. Miché and Morgan R. Heikal

Energy, 2013, vol. 60, issue C, 388-400

Abstract: The selection of a suitable working fluid for a BC (Bottoming Cycle) system is one of the most important steps in maximising system performance and minimising the system size and cost. The presented work details a systematic approach in the selection of working fluids applied to a subcritical cycle with minimum superheat. Over 60 different synthetic, organic, and inorganic fluids were studied. The fluid selection study was decomposed into numerous fluid screening and fluid ranking criteria with common boundary conditions and assumptions. After the cycle was optimised for maximum overall conversion efficiency, the fluid ranking criteria allowed the objective assessment of the working fluids. Acetone, dichloromethane and trans-1,2-dichloroethylene were found as the best candidates for optimal performance and system related trade-offs, contrary to commonly used R245fa, ethanol and water. A BC integrated into an EGR (Exhaust Gas Recirculation) only engine platform to meet Euro 6 oxides of nitrogen emission is examined for improved fuel economy and reduced load on the engine cooling module. The BC simulation results for EGR and partial high temperature after-cooler heat recovery using the proposed new fluids show a specific fuel saving potential between 9.8 and 13.7% for a typical cruise and high load conditions.

Keywords: Heavy duty diesel engine; Exhaust gas recirculation; Waste heat recovery; Bottoming cycle; Working fluid selection (search for similar items in EconPapers)
Date: 2013
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (12)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544213006907
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:60:y:2013:i:c:p:388-400

DOI: 10.1016/j.energy.2013.08.015

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 ().