Pengcheng Li
Analysis of a direct vapor generation system using cascade steam-organic Rankine cycle and two-tank oil storage
Li, Pengcheng; Lin, Haiwei; Li, Jing; Cao, Qing; Wang, Yandong; Pei, Gang; Jie, Desuan; Zhao, Zilong
Authors
Haiwei Lin
Dr Jing Li Jing.Li@hull.ac.uk
Senior Research Fellow
Qing Cao
Yandong Wang
Gang Pei
Desuan Jie
Zilong Zhao
Abstract
A direct vapor generation solar power system using cascade steam-organic Rankine cycle and two-stage oil tanks is proposed. It offers a significantly enlarged storage capacity due to the unique discharge operation mode. Synthetic oil Therminol® VP-1 is used as the heat carrier and storage medium. Compared with the direct steam generation system, the steam turbine inlet temperature is elevated from 270 °C to 311 °C. Thermodynamic analysis indicates that the optimal equivalent heat-to-power conversion efficiency (ηeq,opt) is 27.91% when benzene is used as the bottom fluid and the mass of oil is 1000 tonnes. ηeq,opt is raised by 7.72–11.60% for the selected four organic fluids as compared with the direct steam generation type. The temperature drop of oil during discharge can reach about 280 °C. Economic studies demonstrate that the proposed system is more cost-effective. Its equivalent payback period is less than 5 years for a 10 MW system with 2000 tonnes of oil. Further investigation shows that it is also more advantageous than a conventional thermal oil-based indirect solar power system due to the cost reduction in heat storage.
Citation
Li, P., Lin, H., Li, J., Cao, Q., Wang, Y., Pei, G., Jie, D., & Zhao, Z. (2022). Analysis of a direct vapor generation system using cascade steam-organic Rankine cycle and two-tank oil storage. Energy, 257, Article 124776. https://doi.org/10.1016/j.energy.2022.124776
Journal Article Type | Article |
---|---|
Acceptance Date | Jul 6, 2022 |
Online Publication Date | Jul 15, 2022 |
Publication Date | Oct 15, 2022 |
Deposit Date | Nov 11, 2022 |
Publicly Available Date | Nov 11, 2022 |
Journal | Energy |
Print ISSN | 0360-5442 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 257 |
Article Number | 124776 |
DOI | https://doi.org/10.1016/j.energy.2022.124776 |
Keywords | Direct vapor generation; Cascade steam-organic Rankine cycle; Thermal oil storage; Heat discharge; Equivalent payback period |
Public URL | https://hull-repository.worktribe.com/output/4045606 |
Ensure access to affordable, reliable, sustainable and modern energy for all
Files
Published article
(4 Mb)
PDF
Publisher Licence URL
http://creativecommons.org/licenses/by/4.0
Copyright Statement
2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
You might also like
Editorial: Advanced solar utilization and control technologies in buildings
(2024)
Journal Article