Waste heat to power conversion using Organic Rankine Cycles (ORC) is expected to play an important role in CO2 reductions from diesel engines. Firstly, a review of automotive ORCs is presented focusing on the pure working fluids, thermal architectures and expanders. The discussion includes, but is not limited to: R245fa, ethanol and water as fluids; series, parallel and cascade as architectures; dry saturated, superheated and supercritical as expansion conditions; and scroll, radial turbine and piston as expansion machines. Secondly, research direction in versatile expander and holistic architecture (NOx + CO2) are proposed. Benefits of using the proposed unconventional approaches are quantified using Ricardo Wave and Aspen HYSYS for diesel engine and ORC modelling. Results indicate that, the implementation of versatile piston expander tolerant to two-phase and using cyclopentane can potentially increase the highway drive cycle power by 8%. Furthermore, holistic architecture offering complete utilisation of charge air and exhaust recirculation heat increased the performance noticeably to 5% of engine power at the design point condition.
|Title of host publication||International Conference on Advances in Energy Systems and Environmental Engineering (ASEE17)|
|Place of Publication||France|
|Number of pages||8|
|Publication status||Published - 7 Nov 2017|
|Event||International Conference on Advances in Energy Systems and Environmental Engineering (ASEE17) - University of Science and Technology, Poland, 2-5 July 2017|
Duration: 7 Nov 2017 → …
|Name||E3S Web of Conferences|
|Conference||International Conference on Advances in Energy Systems and Environmental Engineering (ASEE17)|
|Period||7/11/17 → …|
Bibliographical note© The Authors, published by EDP Sciences, 2017. This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
Panesar, A. (2017). Organic Rankine cycle - review and research directions in engine applications. In International Conference on Advances in Energy Systems and Environmental Engineering (ASEE17) (Vol. 22, pp. 1-8). (E3S Web of Conferences). EDP Sciences. https://doi.org/10.1051/e3sconf/20172200132