Research On Evaluation Of Distributed Energy Supply System Based On LCA

As the growing problem of the energy shortage and the environmental protection, development and utilization of a new energy technology, which is efficient and clean, has become a general consensus in the national governments, the scientific community and the public. Distributed energy supply system as one of the effective solutions to these issues has attracted wide attention at home and abroad. How to evaluate so many energy supply schemes and choose the reasonable one, has become the focus of attention.The paper introduced the LCA analysis method into the appraisal system of distributed energy supply system, and expanded LCA analysis method from pollutant emission evaluation to energy consumption impact evaluation. In the analysis process, we not only considered the upstream production process of the systems and the user's energy usage status, but also considered each equipment's year-round operation condition in the system. The main contents and achievements of this paper are as follows:1. Selected a hospital as a research object. According to the characteristics of the energy consumption of the hospital, provided the hospital's energy load delay figure, and put forward the improvement scheme, which can reduce the energy compution.2. Based on the hospital's energy supply characteristic, designed two schemes of the distributed energy supply system. And according to the demand of cold and heat requirements throughout the year, determined the operation mode of each scheme, provided for the distributed energy supply system's LCA analysis.3. Using the method of LCA, established the analysis model of distributed energy supply system.Confirmed the distributed energy supply system upstream and downstream production process in each unit of analytical model, and the energy consumption inventory and environmental emissions inventory of each unit were also confirmed.4. According to different schemes and different energy supply condition, we analyzed the distributed energy supply system schemes'annual energy consumption and environmental emissions inventory, and given the scheme selection suggestion, according to the results of analysis.