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

Yu, X., Li, Z., Lu, Y. , Huang, R. and Roskilly, A. P. (2019) Investigation of organic Rankine cycle integrated with double latent thermal energy storage for engine waste heat recovery. Energy, 170, pp. 1098-1112. (doi: 10.1016/j.energy.2018.12.196)

Abstract

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.

• Item Type: Articles
• Additional Information: The finical support from UK-China Joint Research and Innovation Partnership fund under the grant number 201703780098 and the grants from the National Natural Science Foundation of China under grant number No. 51806189 and No. 51476143, China Postdoctoral Science Foundation under grant number 2018M640556 and from Zhejiang Province Postdoctoral Science Foundation under grant number ZJ20180099 are highly acknowledged. The authors also would like to thank the supports from NSFC-RS Joint Project under the grant number No. 5151101443 and IE/151256, from EPSRC through (EP/P001173/1) - Centre for Energy Systems Integration.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Lu, Dr Yiji
• Authors: Yu, X., Li, Z., Lu, Y., Huang, R., and Roskilly, A. P.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Energy
• Publisher: Elsevier
• ISSN: 0360-5442
• ISSN (Online): 1873-6785
• Published Online: 28 December 2018
• Copyright Holders: Copyright © 2018 Elsevier Ltd.
• First Published: First published in Energy 170:1098-1112
• Publisher Policy: Reproduced in accordance with the publisher copyright policy