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Using urban building energy modeling to quantify the energy performance of residential buildings under climate change

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Building Simulation 2023年第9期16卷 1629-1643页

作者： Zhang Deng Kavan Javanroodi Vahid MNik Yixing Chen College of Civil Engineering Hunan UniversityChangsha 410082China Division of Building Physics Department of Building and Environmental TechnologyLund UniversitySE-22363 LundSweden CIRCLE–Centre for Innovation Research Lund UniversityBox 11822100 LundSweden Key Laboratory of Building Safety and energy Efficiency of Ministry of Education Hunan UniversityChangsha 410082China

The building sector is facing a challenge in achieving carbon neutrality due to climate change and *** building energy modeling(UBEM)is an effective method to understand the energy use of building stocks at an urban scale and evaluate retrofit scenarios against future weather variations,supporting the implementation of carbon emission reduction ***,most studies focus on the energy performance of archetype buildings under climate change,which is hard to obtain refined results for individual buildings when scaling up to an urban ***,this study integrates future weather data with an UBEM approach to assess the impacts of climate change on the energy performance of urban areas,by taking two urban neighborhoods comprising 483 buildings in Geneva,Switzerland as case *** this regard,GIS datasets and Swiss building norms were collected to develop an archetype *** building heating energy consumption was calculated by the UBEM tool—AutoBPS,which was then calibrated against annual metered data.A rapid UBEM calibration method was applied to achieve a percentage error of 2.7%.The calibrated models were then used to assess the impacts of climate change using four future weather datasets out of Shared Socioeconomic Pathways(SSP1-2.6,SSP2-4.5,SSP3-7.0,and SSP5-8.5).The results showed a decrease of 22%–31%and 21%–29%for heating energy consumption,an increase of 113%–173%and 95%–144%for cooling energy consumption in the two neighborhoods by *** average annual heating intensity dropped from 81 kWh/m^(2) in the current typical climate to 57 kWh/m^(2) in the SSP5-8.5,while the cooling intensity rose from 12 kWh/m^(2) to 32 kWh/m^(2).The overall envelope system upgrade reduced the average heating and cooling energy consumption by 41.7%and 18.6%,respectively,in the SSP *** spatial and temporal distribution of energy consumption change can provide valuable information for future urban energy planning against climate cha

关键词： urban building energy modeling climate change model calibration AutoBPS heating and cooling energy consumption

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Climate adaptive thermal characteristics of envelope of residential passive house in China

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Journal of Central South University 2022年第7期29卷 2317-2329页

作者： DUAN Meng-fan SUN Hong-li WU Yi-fan WU Xiao-ying LIN Bo-rong Department of Building Science Tsinghua UniversityBeijing 100084China Key Laboratory of Eco Planning&Green Building Ministry of EducationTsinghua UniversityBeijing 100084China College of Architecture and Environment Sichuan UniversityChengdu 610065China

Passive house has been constructed in China on a large-scale over the past couple years for its great energy saving ***,research indicates that there is a significant discrepancy in energy performance for heating and cooling between passive houses in different climate ***,this research develops a comparative analysis on the energy saving potential of passive houses with the conventional around China.A sensitivity analysis of thermal characteristics of building envelope(insulation of exterior walls and windows,and airtightness)on energy consumption is further carried out to improve the climate adaptability of passive ***,the variation of energy consumption under different heat gain intensity is also compared,to evaluate the effects of envelope thermal characteristics *** suggest that the decrease of exterior wall insulation leads to the greatest increase in energy consumption,especially in severe cold zone in ***,the optimal insulation may change with the internal heat gain intensity,for instance,the decrease of insulation(from 0.4 to 1.0 W/(m^(2)·K))could reduce the energy consumption by 4.65 kW·h/(m^(2)·a)when the heat gain increases to 20 W/m^(2)for buildings in Hot Summer and Cold Winter zone in China.

关键词： passive house envelope thermal characteristics climate adaptability heating and cooling energy consumption

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