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Investigation of organic Rankine cycle integrated with double latent thermal energy storage for engine waste heat recovery

Lookup NU author(s): Dr Yiji LuORCiD, Professor Tony Roskilly



This is the authors' accepted manuscript of an article that has been published in its final definitive form by Elsevier Ltd, 2019.

For re-use rights please refer to the publisher's terms and conditions.


© 2018 Elsevier Ltd In this work, organic Rankine cycle (ORC) integrated with Latent Thermal Energy Storage (LTES) system for engine waste heat recovery has been proposed and investigated to potentially overcome the intermittent and fluctuating operational conditions for vehicle applications. A melting-solidification model has been established to investigate and compare the performance of twelve Phase Change Materials (PCMs) under different heat source conditions. Among the twelve PCMs, LiNO3-KCl-NaNO3 is identified as the optimal PCM for engine exhaust heat recovery. The performance of the ORC system integrating with different volume of LTES using LiNO3-KCl-NaNO3 under dynamic heat source simulating vehicle conditions is studied. Results illustrate the fluctuation of engine exhaust heat can be potentially overcome by using the proposed solution. The condition of 100 L LTES provides 30.4% larger total output work than that of 50 L LTES, while it is merely 1.5% larger than that of 90 L LTES. The performance of three different LTES-ORC scenarios are compared and results show ORC combining with double LTES delivers 17.2% larger total power output than that of single LTES (100 L) under the same operational conditions.

Publication metadata

Author(s): Yu X, Li Z, Lu Y, Huang R, Roskilly AP

Publication type: Article

Publication status: Published

Journal: Energy

Year: 2019

Volume: 170

Pages: 1098-1112

Print publication date: 01/03/2019

Online publication date: 28/12/2018

Acceptance date: 26/12/2018

Date deposited: 28/02/2019

ISSN (print): 0360-5442

ISSN (electronic): 1873-6785

Publisher: Elsevier Ltd


DOI: 10.1016/


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Funder referenceFunder name
201703780098British Council (UK - London)