TY - JOUR
TI - Design and numerical analysis of a composite system of a household biogas digester with pretreatment
AU - Liu Enhai
AU - Zhang Wenyun
AU - Huang Qian
AU - Wan Wenlei
AU - Wang Shuaipeng
JN - Thermal Science
PY - 2023
VL - 27
IS - 3
SP - 1763
EP - 1770
PT - Article
AB - 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.