The Reduction Potential of Energy Consumption, CO<sub>2</sub> Emissions and Cost of Existing Urban Residential Buildings in Hangzhou City, China

Ouyang, Jinlong; Ge, Jian; Shen, Tingting; Hokao, Kazunori; Gao, Jiale

doi:10.3130/jaabe.7.139

Cited by 11 publications

(6 citation statements)

References 16 publications

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“…The proposed framework could potentially be applied to large-scale projects, such as campus district renovation or neighborhood renovation. Studying the energy consumption reduction on a large scale is a relatively new focus area: the first published study on energy retrofit on the district level was found in 2008 by [58]. Since then, several large-scale studies have been published, such as Moscow's residential district renovation impact on energy and emissions [59].…”

Section: Discussionmentioning

confidence: 99%

Optimal Renovation Strategies for Education Buildings—A Novel BIM–BPM–BEM Framework

2018

Sustainability

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The aim of this paper is to propose a novel building information model (BIM)–building performance model (BPM)–building environmental model (BEM) framework to identify the most energy-efficient and cost-effective strategies for the renovation of existing education buildings to achieve the nearly zero-energy goal while minimizing the environmental impact. A case building, the University of Maryland’s Architecture Building, was used to demonstrate the validity of the framework and a set of building performance indicators—including energy performance, environmental impacts, and occupant satisfaction—were used to evaluate renovation strategies. Additionally, this novel framework further demonstrated the interoperability among different digital tools and platforms. Lastly, following a detailed analysis and measurements, the case study results highlighted a particular energy profile as well as the retrofit needs of education buildings. Eight different renovation packages were analyzed with the top-ranking package indicating an energy saving of 62%, carbon emissions reduction of 84%, and long-term cost savings of 53%, albeit with a relatively high initial cost. The most preferable package ranked second in all categories, with a moderate initial cost.

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Section: Discussionmentioning

confidence: 99%

Optimal Renovation Strategies for Education Buildings—A Novel BIM–BPM–BEM Framework

2018

Sustainability

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“…This systematic literature review focuses on the residential con tion sector and contains 52 single-family (SF) buildings, 22 multi-family (MF) buil and one zero-energy residential living laboratory (LL) case study building (Figure A Most of the analysed case studies (43) are based on existing building stock, wh others (32) are based on the assessment of GHG emissions of newly built or designe idential buildings. Based on the collected case studies, it seems that there is a lack is apparent and urgent in both developing and developed economies [93].…”

Section: Appendix a List Of Case Studies And Basic Propertiesmentioning

confidence: 99%

Life Cycle GHG Emissions of Residential Buildings in Humid Subtropical and Tropical Climates: Systematic Review and Analysis

et al. 2020

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Improving the environmental life cycle performance of buildings by focusing on the reduction of greenhouse gas (GHG) emissions along the building life cycle is considered a crucial step in achieving global climate targets. This paper provides a systematic review and analysis of 75 residential case studies in humid subtropical and tropical climates. The study investigates GHG emissions across the building life cycle, i.e., it analyses both embodied and operational GHG emissions. Furthermore, the influence of various parameters, such as building location, typology, construction materials and energy performance, as well as methodological aspects are investigated. Through comparative analysis, the study identifies promising design strategies for reducing life cycle-related GHG emissions of buildings operating in subtropical and tropical climate zones. The results show that life cycle GHG emissions in the analysed studies are mostly dominated by operational emissions and are the highest for energy-intensive multi-family buildings. Buildings following low or net-zero energy performance targets show potential reductions of 50–80% for total life cycle GHG emissions, compared to buildings with conventional energy performance. Implementation of on-site photovoltaic (PV) systems provides the highest reduction potential for both operational and total life cycle GHG emissions, with potential reductions of 92% to 100% and 48% to 66%, respectively. Strategies related to increased use of timber and other bio-based materials present the highest potential for reduction of embodied GHG emissions, with reductions of 9% to 73%.

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“…In this paper, the relative values of the energy-saving effects in fact are assumed to be the same as those in the thermal simulation, as shown as equation (1).…”

Section: Revision Process 41 Revision Of Energy Saving Effectsmentioning

confidence: 99%

“…reveals that: (1). The absolute values of the energy saving effects of the plans in the thermal simulation are highly exaggerated, due to the great discrepancy between the heating and cooling loads in the thermal simulation and in authentic situation, though the relative values of the actual energy saving effects are assumed to be the same as those in the thermal simulation.…”

Section: Revision Process 41 Revision Of Energy Saving Effectsmentioning

confidence: 99%

“…The previous paper (J. Ouyang et al, 2008) firstly advanced six energy saving measures for renovating one existing residential building after analyzing their feasibility in thermal simulation and in practice; then predicted the energy saving effects of the measures by using the feedback coefficient method, the reduction of CO 2 emissions by a simple LCCO 2 method and the costs by a simple LCC method, all for a 40-year residual life span. Finally, based upon the results a suitable plan was developed.…”

Section: Background and Introductionmentioning

confidence: 99%

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Effects of Energy Saving Measures for Existing Urban Residential Buildings Based on Thermal Simulation and Site Investigation of Energy Consumption

Ouyang

Jiang

et al. 2008

Journal of Asian Architecture and Building Engineering

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This is one of two papers that predict the effects of energy saving renovation measures for existing urban residential buildings. The previous paper predicted such effects based on thermal simulation, but the simulative outputs are not sufficiently convincing. So in this paper, the measures' effects will be further analyzed based on the factual electricity consumption from site investigation. Firstly, the monthly electricity consumption of the subject building was investigated in 2007/2008. Then, the factual heating and cooling loads were distinguished through climate analysis. Finally, assuming that the relative energy saving effects of the measures are the same in thermal simulation and in fact, the simulative energy saving effects were revised by applying the factual heating and cooling loads, followed by CO 2 emission and cost for a 40-year residual life span. The results show that the simulative outputs were too exaggerated, and must be revised based on factual electricity consumption. From the viewpoint of reducing energy use and CO 2 emission, it is worth renovating existing residential buildings with energy saving measures, however, the economic benefits following revision are negative because of the too cheap electricity price in China. Therefore the government should provide subsidies for the energy saving renovations of buildings.

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The Reduction Potential of Energy Consumption, CO₂ Emissions and Cost of Existing Urban Residential Buildings in Hangzhou City, China

Cited by 11 publications

References 16 publications

Optimal Renovation Strategies for Education Buildings—A Novel BIM–BPM–BEM Framework

Optimal Renovation Strategies for Education Buildings—A Novel BIM–BPM–BEM Framework

Life Cycle GHG Emissions of Residential Buildings in Humid Subtropical and Tropical Climates: Systematic Review and Analysis

Effects of Energy Saving Measures for Existing Urban Residential Buildings Based on Thermal Simulation and Site Investigation of Energy Consumption

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The Reduction Potential of Energy Consumption, CO2 Emissions and Cost of Existing Urban Residential Buildings in Hangzhou City, China

Cited by 11 publications

References 16 publications

Optimal Renovation Strategies for Education Buildings—A Novel BIM–BPM–BEM Framework

Optimal Renovation Strategies for Education Buildings—A Novel BIM–BPM–BEM Framework

Life Cycle GHG Emissions of Residential Buildings in Humid Subtropical and Tropical Climates: Systematic Review and Analysis

Effects of Energy Saving Measures for Existing Urban Residential Buildings Based on Thermal Simulation and Site Investigation of Energy Consumption

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The Reduction Potential of Energy Consumption, CO₂ Emissions and Cost of Existing Urban Residential Buildings in Hangzhou City, China