Fundamental study on the power output control method of the dynamic model of a CO₂ hydrate engine generator

Abstract

The utilization of alternative energy is being strongly promoted in order to prevent the progression of climate change due to the increase in greenhouse gas emissions. Therefore, in our previous study, the carbon dioxide (CO₂) hydrate engine generator (CHEG), which converts unutilized energy to electrical energy, has been proposed as a way to produce alternative energy. CHEG uses the heat cycle of a CO₂ hydrate which is generated by a small temperature difference using heat from such unutilized energy sources as low-temperature exhaust heat from home heating appliances, difference in temperature between day and night, geothermal heat, etc. In previous works, the theoretical validity of the CHEG as an alternative energy for homes has been analyzed. However, the control method of power output for changing heat source temperature and power load has not been investigated. Therefore, the dynamic model of the CHEG is constructed to investigate the dynamic characteristics of the control method of power output.