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The significance of occupancy profiles in determining post retrofit indoor thermal comfort, overheating risk and building energy performance

机译：占用情况对确定改造后室内热舒适性，过热风险和建筑节能性能的意义

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摘要

Recently, retrofit of tower blocks has gained momentum particularly in the UK social housing sector due to the increasing rate of fuel poverty coupled with deteriorating indoor living conditions. However, the process of making improvements to the thermal performance of building envelopes can significantly impact on occupants' thermal comfort, increasing overheating risks with the changing climate and associated heat waves. The first phase of the study evaluated the building energy performance of a 1960s social housing tower block prototype in London, pre-retrofit, where the building simulation model was created and calibrated with monitored indoor data and occupants' interviews. The second research phase, the subject of this paper, uses the model to further investigate the impact of improved thermal insulation of the building envelope, based on U-values prescribed by the UK Building Regulations (Part L1B), on the potential risk of overheating. The study investigates the impact of retrofitting on occupants' thermal comfort and building energy performance in the current and future climate scenarios (2030, 2050 and 2080). Results confirm that improving the U-value of external walls will significantly reduce the heating energy use by 70% under future climate scenarios while the T-o increases by 15-17% with U-value of 0.5 W/m(2)K and 0.3 W/m(2)K in comparison to the base case. The overall results indicate that the different occupancy patterns adopted in the simulation model have a significant impact on the predicted duration of overheating which will, in turn, have an impact on determining appropriate retrofit strategies to reduce overheating risks.
机译：最近，由于燃料贫乏率的增加以及室内生活条件的恶化，特别是在英国的社会住房领域，塔式大楼的改造已获得了动力。但是，改善建筑围护结构的热性能的过程会极大地影响居住者的热舒适性，并随着气候变化和相关的热浪增加过热风险。研究的第一阶段评估了伦敦1960年代改造前的社会住宅塔楼原型的建筑能源性能，该建筑原型是通过监控的室内数据和住户的采访创建并校准的，其建筑模拟模型已经过校准。第二个研究阶段（本文的主题）使用该模型，根据英国《建筑规范》（L1B部分）规定的U值，进一步研究改善建筑围护结构的隔热效果对潜在的过热风险的影响。该研究调查了在当前和未来的气候情景（2030年，2050年和2080年）中，改造对乘员的热舒适性和建筑能耗的影响。结果证实，改善外墙的U值将在未来的气候情景中显着减少70％的热能使用，而To会以15 W-m（2）K和0.3 W的U值增加15-17％。 / m（2）K（与基本情况相比）。总体结果表明，仿真模型中采用的不同占用模式对预计的过热持续时间有重大影响，进而将对确定适当的改造策略以降低过热风险产生影响。

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  • 来源
    《Building and Environment》 |2020年第4期|106676.1-106676.11|共11页
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  • 作者单位

    Univ East London Sch Architecture Comp & Engn Dept Architecture & Visual Arts London E16 2RD England;

    Univ East London Sch Architecture Comp & Engn Dept Architecture & Visual Arts London E16 2RD England|Oxford Brookes Univ Sch Architecture Low Carbon Bldg Res Grp Oxford England;

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  • 正文语种 eng
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  • 关键词

    Retrofit; Energy efficiency; Overheating; Thermal comfort; Social housing; Future climate;

    机译：改造;能源效率;过热;热舒适性;公益住房;未来气候;

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