小型能源总线系统全年动态热力性能仿真分析

Numerical Analyses on Dynamic Thermal Performance of Small Energy Bus System

能源总线系统是集成化规模化应用区域内的可再生能源及未利用能源的低碳区域能源系统。本文以TRNSYS为仿真平台,构建基于浅层地热能利用的土壤源与地表水源集成形式的能源总线系统各个部件的理论模型,对系统进行全年变工况动态逐时仿真研究,计算小型能源总线系统应用于金茂崇明低碳实验社区的全年逐时热力性能。研究结果表明,能源总线系统的全年系统综合热力性能系数达3.5,而常规方案的系统综合热力性能系数均小于1.5,节能率和减碳率均大于20%,实现了可再生能源利用与能量回收综合效益。

The energy bus system is a low carbon thermal energy system that can make integration of renewable energy sources or untapped energy sources for district heating and cooling. A small energy bus system was constructed by combining ground soil and surface water as low grade energy. The models of components in the system were developed according to theoretical analyses and test data of manufacturer,and the whole system was constructed by connecting various components on TRNSYS platform. The hourly and annual thermal performance of the system was simulated when it was applied to the Jinmao Chong Ming low-carbon experiment community. The result shows that the annual thermal coefficient of performance of the system is 3. 5,while the thermal coefficient of performance for conventional systems is less than 1. 5. Both energy saving rate and carbon reduction rate of the system are more than 20%. It can be seen that comprehensive benefits of renewable energy use and energy recovery are achieved in energy bus system.