Energy-efficient retrofitting and energy consumption in a historic city centre – an example from Lhasa

Energy-efficient retrofitting and energy consumption in a historic city centre – an example from Lhasa
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历史悠久的市中心的节能改造和能源消耗——以拉萨为例

DOI:
10.1080/02513625.2014.979043
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发表时间:
2014-07
期刊:
Disp-the planning review
影响因子:
--
通讯作者:
Neveen Hamza
Neveen Hamza
中科院分区:
其他
文献类型:
--
作者:
Lingjiang Huang;Zhengdong Huang;Neveen Hamza

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摘要历史建筑和城市环境的保护可以提高生活质量,刺激经济发展,减少能源消耗的碳排放。然而,由于人们对室内热舒适性的期望越来越高,对现代生活技术的依赖越来越大,城市历史环境中的能源消耗预计会增加。本文以拉萨市历史文化名城中心为例,分析了历史建筑窗户改造的能耗和碳排放问题,重点研究了能源使用与窗户改造之间的关系。首先,对拉萨市一座藏族传统建筑的热工性能进行了模拟和分析。其次,通过计算机模拟评估了四种窗户类型的改造,并比较了它们对能耗的影响。最后,对不同窗型的历史城市中心整体的能源需求和碳排放进行了估算和比较。在能源效率和历史保护方面,目前的单层窗户改造做法表现不佳,而木框架和二级玻璃的窗户可能会取得更好的性能。该方法为拉萨历史悠久的城市中心的能源消耗和碳排放减半提供了机会。
Abstract The conservation of historic buildings and urban environments can have the potential to improve the quality of life, stimulate economic development and reduce carbon emissions from energy consumption. However, given increasing expectations of indoor thermal comfort and an increasing dependency on modern living technologies, energy consumption in the urban historic environment is expected to rise. This paper examines the retrofitting of windows to historic buildings and issues of energy consumption and carbon emission in Lhasa's historic city centre, focusing on the relationship between energy use and window retrofitting. First, the thermal performance of a traditional Tibetan building in Lhasa is simulated and examined. Second, four window types for retrofitting are evaluated through computer modelling and their impacts on energy consumption are compared. Finally, the energy demand and carbon emission of the whole historic city centre with various window types are estimated and compared. In terms of energy efficiency and historic preservation, current single-layered window retrofitting practices perform badly, while windows with wooden frames and secondary glazing may achieve better performance. The approach offers the opportunity to halve the energy consumption and carbon emissions in the Lhasa historic city centre.
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