THERMAL SCIENCE

International Scientific Journal

Enhai Liu

,

Wenyun Zhang

,

Qian Huang

,

Wenlei Wan

,

Shuaipeng Wang

DESIGN AND NUMERICAL ANALYSIS OF A COMPOSITE SYSTEM OF A HOUSEHOLD BIOGAS DIGESTER WITH PRETREATMENT

ABSTRACT
The rural household biogas digesters are studied in this paper, and numerical analysis is used to simulate the effects of light climates in the cold season and the heat of sunlight on the temperature distribution in the pool. The numerical results show that the uneven distributions of light intensity and temperature in the biogas digester have a great influence on its cumulative gas production. The central area has a significant heat collection effect, the inner wall is weaker, and the temperature near the top is slightly higher than that in the lower area, and the vertical temperature changes in a decreasing trend. Aiming at the different photo-climatic conditions of the household biogas digester and the uneven heat collection and temperature distribution in different periods, the traditional slag pumping work is cumbersome, and the utilization rate of the biogas residue is low, so a new household with pretreatment is proposed. An intelligent temperature control system is designed for the biogas tank to analyze the adverse effects of straw fermentation at low temperature, insufficient gas production and low resource utilization.
KEYWORDS
biogas digester, temperature control system, simulation, design
PAPER SUBMITTED: 2021-12-23
PAPER REVISED: 2022-06-26
PAPER ACCEPTED: 2022-06-27
PUBLISHED ONLINE: 2023-06-11
DOI REFERENCE: https://doi.org/10.2298/TSCI2303763L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 3, PAGES [1763 - 1770]
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Design and numerical analysis of a composite system of a household biogas digester with pretreatment

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence