不同气候条件下BIPVT建筑供能系统节能特性分析

设计了基于微热管阵列的光伏光热建筑一体化(building integrated photovoltaic-thermal,BIPVT)组件与近零能耗建筑,该建筑采用太阳能-空气能多能互补供能系统,实现了建筑供冷、供热与供电的多种用能需求.为研究该建筑在不同气候条件下能否满足近零能耗建筑的标准,搭建了BIPVT建筑及太阳能-空气能多能互补供能系统,建立了供能系统仿真模型,对不同气候条件下BIPVT建筑的节能特性进行分析.结果表明,不同气候条件下,BIPVT建筑供能系统的太阳能贡献率占建筑负荷比例为56%~98%,发电量占满足建筑环境需求用电量的比例为70%~100%.根据近零能耗建筑技术标准,对BIPVT建筑的节能特性进行分析,在不同气候条件下的典型城市,BIPVT建筑都可以满足近零能耗建筑或零能耗建筑的标准,节能减排效益较好.

LINKING CONSTRUCTIVE AND ENERGY INNOVATIONS FOR A NET ZERO-ENERGY BUILDING

This article explains the design,construction and energy strategies of LINQ,a net-zero energy building that was successfully entered into the Solar Decathlon Middle East 2018 held in Dubai.Students of engineering,building physics,architecture and urban planning designed,built and operated LINQ.It is mainly powered by solar energy and made of bio-materials.Some of LINQ’s innovations are the ventilated façade with customizable bio-based tiles,the indirect evaporative water cooling system,and the light building integrated photovoltaic-thermal system.LINQ sent more energy to the grid than it drew throughout the competition.However,energy production could have been improved according to simulations and technical specifications.LINQ is a good example of current and future building expectations-combining multiple criteria,strategies,and solutions-to contribute to environmental,social and economic sustainability.

新型BIPVT超低能耗建筑节能特性研究

将微热管阵列应用于建筑一体化光伏光热(BIPVT)组件,设计了多能互补耦合热泵供能系统,实现了太阳能与空气能高效互补利用,并搭建了新型BIPVT超低能耗建筑。同时建立了BIPVT建筑的仿真模型,并将其与BIPV幕墙建筑和普通参考建筑的产能与用能进行模拟与对比分析。结果表明,新型BIPVT建筑全年累计空调负荷为3033 k W·h,相对于BIPV幕墙,建筑负荷降低了32.9%。相对于参考建筑,负荷增加了8.6%。新型BIPVT建筑能耗综合值为113.5 k W·h/(m^(2)·a),相对于BIPV幕墙和普通墙体围护结构,新型BIPVT建筑综合节能率分别为38.5%和62.2%。本研究为超低能耗建筑的应用提供了新的技术方法与理论依据。