London's urban heat island: Impact on current and future energy consumption in office buildings
London's urban heat island: Impact on current and future energy consumption in office buildings
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DOI：
10.1016/j.enbuild.2011.12.019
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发表时间：
2012-04-01
影响因子：
6.7
通讯作者：
Mavrogianni, A.
中科院分区：
文献类型：
--
作者：
Kolokotroni, M.;Ren, X.;Mavrogianni, A.
本文介绍了一个计算研究的结果，能源消耗和相关的CO2排放量的供暖和制冷的伦敦城市热岛内的办公楼，目前和未来。该研究开发了20个沿东西轴线穿过伦敦的天气文件：这些天气文件是根据2050年适用于英国的未来气候变化情景构建的，这些天气文件已根据为此目的开发的程序（LSSAT）的测量和预测进行了修改，以代表伦敦城市热岛内的特定位置。该研究模拟了一个办公室的典型结构，热增益和操作模式与先进的热模拟程序（IESVE）。预测证实，随着办公地点从农村转移到城市以及从现在到未来几年，供暖负荷减少，制冷负荷和过热时间增加。结果表明，内部热收益是影响能源性能的一个重要因素，夜间冷却使用自然通风将在农村和城市的位置产生有益的影响。随着未来过热现象的增加，更多的建筑物将使用制冷;据显示，这可能导致2050年伦敦市中心办公室的二氧化碳排放量增加五倍。本文介绍了位于城市东西轴线上的典型办公室的详细结果，认为有必要考虑使用基于气候预测和城市热岛的天气文件来设计当前的建筑物，以保障其未来的效率。(C)2011 Elsevier B. V.保留所有权利。
This paper presents the results of a computational study on the energy consumption and related CO2 emissions for heating and cooling of an office building within the Urban Heat Island of London, currently and in the future. The study developed twenty weather files in an East-West axis through London: the weather files were constructed according to future climate change scenario for 2050 suitable for the UK which have been modified to represent specific locations within the London UHI based on measurements and predictions from a program developed for this purpose (LSSAT). The study simulated an office with typical construction, heat gains and operational patterns with an advanced thermal simulation program (IESVE). The predictions confirm that heating load decreases, cooling load and overheating hours increase as the office location moves from rural to urban sites and from present to future years. It is shown that internal heat gains are an important factor affecting energy performance and that night cooling using natural ventilation will have a beneficial effect at rural and city locations. As overheating will increase in the future, more buildings will use cooling; it is shown that this might lead to a five-fold increase of CO2 emission for city centre offices in London in 2050. The paper presents detailed results of the typical office placed on the East-West axis of the city, arguing the necessity to consider using weather files based on climate projections and urban heat island for the design of current buildings to safeguard their efficiency in the future. (C) 2011 Elsevier B.V. All rights reserved.