Analysis of optimum scale of biomass gasification combined cooling heating and power (CCHP) system based on life cycle assessment(LCA)

Integrating combined cooling heating and power(CCHP) system with biomass gasification is a reliable and sustainable way to utilize the biomass resource. Due to the economic feasibility, environmental emissions and energy consumption is relation with the scale of the system, for the purpose of evaluating the optimum scale of the CCHP system based on biomass gasification, the methodology of life cycle assessment(LCA) is employed. Analysis and comparison are performed with changes in biomass cost, cost of energy supply, energy consumption and environment impact under different system scales. The results indicate that no matter biomass cost, cost of energy supply, environment impact and energy consumption, it decreases firstly and then increases with the growing of the system scale, and the comprehensive performance is optimal when the scale of the system is about 5MW.