Energy and exergy analysis of biogas reactor which used different organic manure aided solar energy, heat controlling and phase change material

Abstract

Recently, there are many studies about renewable energy sources. Solar energy is the most important renewable energy sources. Biogas is commonly recognized as an important renewable energy sources. Also the utility of solar energy in biogas production is an important phenomenon. In this study; biogas reactor which was aided solar energy was improved. Reactor was projected like three cylindrical jackets. The inner cylindrical jacket in which was put the organic materials in order to obtain the biogas is the area. The middle cylindrical jacket is the area where pass the hot water that was obtained from a solar collector. The outer cylindrical jacket in where the heat was stored by the phase change materials. As a phase change material CaCl 26H 2O was preferred. To obtain 32 °C in the conditional room, a control unit which is PID was used. The present study deals with the energy and exergy analysis of solar energy, pump and the chemical exergy of the reactor. The daily methane produced by the solar-assisted anaerobic digester is also calculated for energy and exergy analysis of system. To calculate the exergy analysis of chemical reactors unit is produced combustion room. It is shown that the exergy of the chemical reacting system is equal to the difference between the changes in Gibbs free energy and change the flow exergy.