낮은 시상수를 이용한 전기화학-열역학 사이클 효율 최적화

다국어 초록 (Multilingual Abstract)

The heat sources richly exist and are readily available in various industries such as thermal power plants, solar plants, and renewable energies. However, after the heat is used as the primary energy, it remains as waste heat in various temperature ranges. In particular, low-grade heat, which is less than 130 ℃ of waste heat, cannot be used at 100% energy due to energy loss. The thermoelectric device has been studied to this heat usefully, but this device has a problem of low efficiency in low-grade heat. Recently, when the temperature of an electrochemical cell, i.e., battery, increases, a voltage rise due to a thermal-galvanic effect is discovered and is theoretically more efficient than the thermoelectric device. A phenomenon similar to this effect also occurs in supercapacitor. However, generated voltage is reduced under the influence of the self-discharge of the supercapacitor, which affects the thermodynamic cycle efficiency. In this study, self-discharge was minimized by lowering the supercapacitor’s time constant by controlling the water’s flow rate. As a result, the value of the temperature coefficient, which means the voltage change with the temperature change, has been improved, which is predicted to increase thermodynamic efficiency.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 이론 및 실험결과
• 3. 결론 및 향후 계획
• 참고문헌