光伏驱动辐射制热低碳建筑供暖系统的仿真与分析

Simulation Analysis on Low-Carbon Building Heating System with Photovoltaic Power Generation and Radiation Heating

建筑低碳供暖是支撑国家“双碳”的重要场景,基于此提出一种光伏发电驱动的半导体低温辐射制热低碳建筑供暖系统及其运行策略.通过对房屋围护结构传热和辐射换热的简化与等效,建立了半导体低温辐射供暖的物理模型,并考虑光伏发电与供热需求的不确定性,构建光伏供能系统,提出了供暖与供能运行策略,实现系统的Simulink模拟仿真,论证了该系统快速升温、低温运行的采暖特征.研究结果表明,以武汉市冬季采暖为例,与传统电网供电采暖系统相比,该系统可降低采暖季碳排放43.01%、节约供暖成本47.85%.若计入光电上网产生的收益及减排效果,可降低采暖季碳排放达73.9%、节约供暖成本达76.48%.

Low-carbon building is an important scenario to achieve carbon peaking and carbon neutrality goals under the new development philosophy in China.Based on this,a low-carbon building heating system(LCBHS)driven by photovoltaic power generation and semiconductor radiation heating,and its operation strategy were proposed in this work.Firstly,simplifying and making equivalent to the heat transfer in envelope structure and radiant heat transfer,a physical model was established based on the semiconductor radiation heating.Then,considering the uncertainties of photovoltaic power generation and heating demand,a photovoltaic energy supply system was constructed.Furthermore,the operation strategies of heating and energy supply for the LCBHS were presented.Finally,a simulation analysis was carried out for the whole system in Simulink.The results show that the LCBHS possesses a faster heating response and a lower operation temperature compared with the traditional grid powered heating system.In addition,taking the heating season of Wuhan as example,the carbon emission and corresponding heat cost during the heating season are reduced by 43.01%and 47.85%,respectively.Moreover,when concerning the benefits and impacts of transferring the electricity generated by the photovoltaic system to the grid,the reductions of carbon emission and heating cost are more significant.The decrease of carbon emission can reach to 73.9%and the heating cost can be reduced by 76.48%.