Study of a Power Generation System for Distributed Power Supplies that Utilizes the High-Pressure Dissociation Characteristics and the Small Difference in the Temperature of CO2 Hydrate

Abstract

When the mixed fluid of gas and water is pressurized and cooled to a given pressure and temperature, the generation of a gas-hydrate occurs. By heating, a very high pressure is obtained from the dissociated gas from the gas-hydrate. The purpose of this study is to investigate the operation of a high-pressure gas engine generator for distributed power supplies using the high pressure obtained though the dissociation of a gas-hydrate. A gas-hydrate functions as a working fluid and as a form of energy storage. However, until now, an actuator that uses the dissociation inflation characteristics of a gas-hydrate has not been examined. Therefore, the generation rate of CO 2 hydrate and the quantity to be stored from the dissociation expansion energy of CO 2 hydrate were investigated. As a result, when 1 m 3 of water was used to generate CO 2 hydrate for 480 minutes, the result was that electric power corresponding to approximately 45% of the daily power consumption (4.5 kWh of generator outputs) of an individual house can be stored.

Development of a compound energy system for cold region houses using small-scale natural gas cogeneration and a gas hydrate battery

“…However, the technology described above requires electric power, and if fossil fuels are to be avoided, it means an increase in either thermal or nuclear power generation. The purpose of this study was, therefore, the development of a complex of cogeneration and the GHB system, using a small-scale natural gas engine [20,21] to reduce fossil fuel consumption for cold regions during winter, and subsequently greenhouse gases.…”