Proposed Partial Repowering of a Coal-Fired Power Plant Using Low-Grade Solar Thermal Energy

摘要: In this paper, a hybrid power-generation system with integration of solar heat at approximately 300 ⁰C was proposed for coal-fired power plant. The investigated the aid energy-utilization diagram methodology (EUD methodology). research, instead steam, low-grade utilized to feed water, leading an improvement in plant thermodynamic performance. net annual solar-to-electric efficiency recorded as over 15%. Solar feed-water heaters can operate line previously used during off-design period. A preliminary economic evaluation demonstrated that increased capital cost collectors may be $2,007/kWe. promising results indicated thermal cycle offers approach integrates mid-temperature partially repower existing plants.