High-efficiency power generation system with integrated supercritical water gasification of coal

Zhewen Chen; Lin Gao; Xiaosong Zhang; Wei Han; Sheng Li

doi:10.1016/j.energy.2018.06.140

High-efficiency power generation system with integrated supercritical water gasification of coal

Zhewen Chen^*
, Lin Gao
, Xiaosong Zhang
, Wei Han
, Sheng Li

^*Corresponding author for this work

North China Electric Power University
CAS - Institute of Engineering Thermophysics
University of Chinese Academy of Sciences
Hainan University

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

A novel power generation system with integrated supercritical water gasification (SCWG) of coal is proposed in this article. The gasification product directly enters the supercritical turbine to generate electricity. After pressure relief, the syngas separated from the unreacted water is transferred to the combined cycle. The influences of coal-water-slurry concentration (CWSC) and the outlet pressure (P_h) of the supercritical turbine on the system performances are studied. The results show that the thermal efficiency increases with increasing CWSC or decreasing P_h. The ultimate thermal efficiency of the system can be obtained when the CWSC is 25 wt% and P_h is 1 bar, which can approach 54.68%. The thermal efficiency of the novel system is higher than that of the power generation system with integrated SCWG of coal and parallel chemical heat recovery.

Original language	English
Pages (from-to)	810-816
Number of pages	7
Journal	Energy
Volume	159
DOIs	https://doi.org/10.1016/j.energy.2018.06.140
Publication status	Published - 15 Sept 2018
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Energy balance
Supercritical water gasification
System integration

Access to Document

10.1016/j.energy.2018.06.140

Cite this

@article{b6865d0810294e3687cf8120e997b0ee,

title = "High-efficiency power generation system with integrated supercritical water gasification of coal",

abstract = "A novel power generation system with integrated supercritical water gasification (SCWG) of coal is proposed in this article. The gasification product directly enters the supercritical turbine to generate electricity. After pressure relief, the syngas separated from the unreacted water is transferred to the combined cycle. The influences of coal-water-slurry concentration (CWSC) and the outlet pressure (Ph) of the supercritical turbine on the system performances are studied. The results show that the thermal efficiency increases with increasing CWSC or decreasing Ph. The ultimate thermal efficiency of the system can be obtained when the CWSC is 25 wt\% and Ph is 1 bar, which can approach 54.68\%. The thermal efficiency of the novel system is higher than that of the power generation system with integrated SCWG of coal and parallel chemical heat recovery.",

keywords = "Energy balance, Supercritical water gasification, System integration",

author = "Zhewen Chen and Lin Gao and Xiaosong Zhang and Wei Han and Sheng Li",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = sep,

day = "15",

doi = "10.1016/j.energy.2018.06.140",

language = "English",

volume = "159",

pages = "810--816",

journal = "Energy",

issn = "0360-5442",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - High-efficiency power generation system with integrated supercritical water gasification of coal

AU - Chen, Zhewen

AU - Gao, Lin

AU - Zhang, Xiaosong

AU - Han, Wei

AU - Li, Sheng

PY - 2018/9/15

Y1 - 2018/9/15

N2 - A novel power generation system with integrated supercritical water gasification (SCWG) of coal is proposed in this article. The gasification product directly enters the supercritical turbine to generate electricity. After pressure relief, the syngas separated from the unreacted water is transferred to the combined cycle. The influences of coal-water-slurry concentration (CWSC) and the outlet pressure (Ph) of the supercritical turbine on the system performances are studied. The results show that the thermal efficiency increases with increasing CWSC or decreasing Ph. The ultimate thermal efficiency of the system can be obtained when the CWSC is 25 wt% and Ph is 1 bar, which can approach 54.68%. The thermal efficiency of the novel system is higher than that of the power generation system with integrated SCWG of coal and parallel chemical heat recovery.

AB - A novel power generation system with integrated supercritical water gasification (SCWG) of coal is proposed in this article. The gasification product directly enters the supercritical turbine to generate electricity. After pressure relief, the syngas separated from the unreacted water is transferred to the combined cycle. The influences of coal-water-slurry concentration (CWSC) and the outlet pressure (Ph) of the supercritical turbine on the system performances are studied. The results show that the thermal efficiency increases with increasing CWSC or decreasing Ph. The ultimate thermal efficiency of the system can be obtained when the CWSC is 25 wt% and Ph is 1 bar, which can approach 54.68%. The thermal efficiency of the novel system is higher than that of the power generation system with integrated SCWG of coal and parallel chemical heat recovery.

KW - Energy balance

KW - Supercritical water gasification

KW - System integration

UR - https://www.scopus.com/pages/publications/85049922108

U2 - 10.1016/j.energy.2018.06.140

DO - 10.1016/j.energy.2018.06.140

M3 - Article

AN - SCOPUS:85049922108

SN - 0360-5442

VL - 159

SP - 810

EP - 816

JO - Energy

JF - Energy

ER -

High-efficiency power generation system with integrated supercritical water gasification of coal

Abstract

UN SDGs

Keywords

Access to Document

Other files and links

Fingerprint

Cite this