Study On Modification Of Phase Change Energy Storage Materials Suitable For Biogas Fermentation

In this study, the problems of supercooling and phase separation of inorganic hydrated salts as phase change energy storage materials when applied to biogas generating devices were investigated. In the experiment, two common hydrated salts of zinc nitrate hexahydrate and disodium hydrogen phosphate dodecahydrate were selected as phase change materials, and tested at room temperature. Recording temperature and drawing the step cooling curve method, by adding different proportions of nucleating agent and dye to improve the supercooling and phase separation of the phase change materials, so that the reaction temperature of the biogas plant was always maintained at a suitable temperature ( 20-30 degrees C) to ensure the activity of microorganisms. The experimental results showed that sodium tetraborate decahydrate can effectively reduce the subcooling degree of zinc nitrate hexahydrate, and the azo (-N=N-) dye not only improved the solar absorption rate but also weakened the phase separation of phase change materials to some extent. This study proposed a possible reaction mechanism and provided reference for the development and application of other solar energy storage materials for bioreactors.