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CFD Simulation and Experimental Study on a Thermal Energy Storage–Updraft Solid Waste Gasification Device

CFD Simulation and Experimental Study on a Thermal Energy Storage–Updraft Solid Waste Gasification Device

Authors :
Zepeng Sun
Yazhuo Wang
Jing Gu
Haoran Yuan
Zejian Liu
Leilei Cheng
Xiang Li
Xian Li
Source :
Energies, Vol 16, Iss 12, p 4580 (2023)
Publication Year :
2023
Publisher :
MDPI AG, 2023.

Abstract

A thermal energy storage–updraft gasification device is a type of reactor that should be considered for use in solid waste gasification research that can save energy. However, the operating parameters and internal flow field during its operation remain unclear. In this study, a numerical model of the thermal energy storage–solid waste gasification device based on the computational fluid dynamics dense discrete phase model (CFD-DDPM) which had almost never been used before was established, and an innovative method that causes particles to be piled to simulate the gasification process was proposed according to the updraft fixed bed gasification characteristics; meanwhile, solid waste gasification experiments were conducted on the device. This study focused on the influence of moisture content and excess air coefficient on the gasification process of solid waste particles, and the velocity, pressure, temperature, and species distribution of the internal flow field of the device were analyzed. Simulation results showed that the higher the moisture content of particles, the greater the amplitude of changes in the internal physical field of the device. The fluid pressure drop is around 25 Pa–75 Pa for different working conditions. The combustible species of the gas of moist particles raise slightly with the increase in excess air coefficient, while the dry particles have the opposite effect. Compared with other gasification devices of the same type, the hydrogen production of this device is about 2–3 times higher. Our findings could facilitate the analysis, predict the operation status, and provide a theoretical basis for the improvement of this device.

Details

Language :
English
ISSN :
19961073
Volume :
16
Issue :
12
Database :
Directory of Open Access Journals
Journal :
Energies
Publication Type :
Academic Journal
Accession number :
edsdoj.f5c2ef0ba5404d32882d1c50979bff42
Document Type :
article
Full Text :
https://doi.org/10.3390/en16124580