拉萨地区传统藏式民居PVT供暖系统性能研究

Performance of PVT Heating System in Traditional Tibetan Residential Houses in Lh

在分析总结藏式民居建筑特点和节能特性的基础上,选取拉萨地区低层居住建筑为研究对象,设计了水冷型光伏光热一体化(Integrated Photovoltaic Thermal,PVT)供暖系统,对其性能进行了实验研究和模拟分析。PVT系统集热和发电性能实验结果表明:合适的流量和较低的初始温度有利于系统获得更高的集热效率,运行流量和初始温度变化对PVT组件的发电效率影响都较小。采用TRNSYS软件模拟了PVT供暖系统在拉萨地区传统藏式民居典型建筑中的运行情况,模拟结果表明:所设计的PVT供暖系统能够满足典型建筑的卧室供暖、全年生活热水需求,全年太阳能保证率能达到80.3%。探索了利用低品位太阳能实现拉萨地区传统藏式民居供暖的可行性和技术方案,为我国严寒和寒冷地区的清洁供暖和太阳能建筑一体化应用提供了新思路。

Based on the analysis and summary of the characteristics of Tibetan residential buildings and energy-saving characteristics,the low-rise residential buildings in Lhasa are selected as the research object to design the water-cooled Integrated Photovoltaic Thermal(PVT)heating system,and its performance is experimentally studied and simulated.The experimental results of heat collection and power generation performance of PVT system show that proper flow rate and low initial temperature are favorable for the system to obtain higher heat collection efficiency,and the variation of operating flow rate and initial temperature has a little influence on the power generation efficiency of PVT component.TRNSYS software is used to simulate the operation of PVT heating system in typical Tibetan residential buildings in Lhasa.The simulation results show that the designed PVT heating system can meet the requirements of bedroom heating and annual domestic hot water of typical buildings,and the annual solar energy guarantee rate can reach 80.3%.This paper explores the feasibility and technical scheme of using low grade solar energy to realize the heating of traditional Tibetan residential houses in Lhasa,which provides a new idea for the integrated application of clean heating and solar energy building in cold and cold regions of China.