摘要
简要介绍了北美目前最大的跨季太阳能储存项目——加拿大Okotoks小镇的太阳能小区建设,对其太阳能供热系统的工作原理及利用土壤床作为储能体进行大规模跨季节太阳能储存的方法进行了分析。该项目根据不同季节可利用太阳能数量的不同,分别设置了短期(临时)太阳能储箱(STTS)及跨季节太阳能储存箱(BTES),以提高太阳能的利用率。其中,BTES的效率可达50％以上。小区太阳能家用热水系统(DWH)可满足住户60％的热水需求,而太阳能采暖系统则可满足90％采暖要求;建成后每幢住宅每年可减排5t温室气体,整个小区可减排260t／年。
The Drake Landing Solar Community program is one of the largest solar seasonal storage projects in North America. Fifty-two single-family houses in a new subdivision rely on a community-based district solar heat system with borehole thermal energy storage. Solar heat collected during the summer is preserved in a shod term storage tank （STTS） and long-term underground themal energy storage （UTES） using borehole thermal energy storage （BTES） to achieve higher system efficiency with cost effectiveness, There is high heat loss in the un insulated ground storage but the efficiency of BTES should exceed 50%. By using a wastewater heat recovery unit, it will achieve 60%-65% solar fraction on domestic hot water （DHW） heating. The large-scale district solar heating system will supply 90% of the space heatingrequirement Each house will reduce 5 tons of greenhouse gas （GHG） per year, and the whole community will achieve 260 tons or 82% reduction of GHG annually Design tools include the HOT-2000 computer program to estimate the heat loss of each house, to the TRNSYS program for energy simulation of the houses, solar collector system and thermal storage.
出处
《新建筑》
2005年第6期26-28,共3页
New Architecture
