Operation Strategy and Economic Analysis of Biogas CCHP System including Compressed Air Energy Storage

摘要

Combined cooling heating and power (CCHP) system in which biogas internal combustion engine (ICE) as the prime mover is a valid way to solve energy crisis and environmental pollution, energy storage device accessing grid become feasible due to the time-of-use (TOU) power price policy. A combined system coupling biogas ICE with compressed air energy storage (CAES) is proposed and the study of different operation modes is conducted. Economic analysis is done on the basis of models of different energy-supply systems. Results demonstrate the proposed system has great economic advantages, the ICE capacity is reduced and power generating efficiency is improved due to the CAES.