Combined thermal and daylight analysis of a typical public rental housing development to fulfil green building guidance in Hong Kong

Chen, Xi; Yang, Hongxing

doi:10.1016/j.enbuild.2015.09.032

Cited by 41 publications

(14 citation statements)

References 26 publications

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“…A comparative analysis was conducted on the simulated thermal performance of a high-rise building in London, using the Integrated Environmental Solution – Virtual Environment 33 as a recognised and widely used building simulation tool in industry. 34 Mousavi and Khana 22 demonstrated IES as a valid tool for daylight analysis with RADIANCE-IES and although discrepancy between dynamic building simulation model output and that of real building energy consumption is widely acknowledged. Literature 35,36 have shown that dynamic simulation tools (including IES) demonstrate good internal consistency for modelling temperature response to environmental conditions.…”

Section: Methodsmentioning

confidence: 99%

Modelling the overheating risk in an uniform high-rise building design with a consideration of urban context and heatwaves

Habitzreuter

Smith

Keeling

2019

Indoor and Built Environment

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Overheating in buildings is one of the increasing concerns related to climate change and can lead to an increase in heat-related health issues and higher energy consumption due to the use of air conditioning systems. Literature shows that internal conditions and demand on environmental control systems can vary with height within buildings. However, an architectural trend towards highly glazed façades for tall buildings suggests the vertical gradient of performance is not always considered in the design process. By simulating a high-rise residential building in London, a comparative analysis of the overheating risks and daylighting at different levels in the building was conducted. In this study the model was able to consider the influence of surrounding built environment on solar gain and so influence of urban location on overheating risk was taken into account. Simulations were conducted using typical reference years as well as meteorological data for specific heat-wave periods experienced in London and that are expected to become more intense and frequent due to climate change. Passive mitigation options (external shading) are demonstrated to help reduce overheating occurrence by 74%, at the same time the impact of decreased daylighting (30%) is less problematic at higher levels where daylight factor is greater.

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Section: Methodsmentioning

confidence: 99%

Modelling the overheating risk in an uniform high-rise building design with a consideration of urban context and heatwaves

Habitzreuter

Smith

Keeling

2019

Indoor and Built Environment

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“…Among these tools, IES-VE is a popular commercial software used worldwide including China [55]. The validation and accuracy of this software have been proven by the BESTEST (Building Energy Simulation Test) standard of the International Energy Agency (IEA), green building rating schemes and amounts of existing studies [56][57][58][59]. Moreover, it has extensive capabilities for modeling customize systems and controls, which allows for the simulation of the intermittent operation mode of air conditioners in the case study.…”

Section: Calculation Of Operational Energy Consumption Of the Hypothementioning

confidence: 99%

Optimization of Insulation Thickness of External Walls of Residential Buildings in Hot Summer and Cold Winter Zone of China

2020

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It is important to reduce primary energy consumption and greenhouse gas emissions associated with residential buildings in the hot summer and cold winter (HSCW) zone of China. Changing the insulation thickness of the external walls of residential buildings (ITEWB) is regarded as an effective way to manage such problems within a budget. This paper aims at developing an innovative way to select the optimal insulation thickness of external walls for residential buildings (OTWRB) in the HSCW zone of China, considering economic, energy and greenhouse gas emissions issues associated with the ITEWB. Four different cities and two different operation modes of the air conditioners (continuous and intermittent) are considered in this study. To explain the selection process, typical hypothetical buildings are simulated in Wuhan, Changsha, Hangzhou and Chengdu. Expanded polystyrene is chosen as the material of the insulation layer while split air conditioners are selected as the equipment for space heating and cooling. Integrated Environmental Solutions-Virtual Environment is used for the dynamic operational energy consumption of buildings. Life cycle cost method is adopted to calculate the economic impact of ITEWB on building performance. The Chinese life cycle database is used to quantize the impacts of ITEWB on building performance in the aspect of energy and greenhouse gas emissions based on the life cycle theory. The most appreciated insulation thickness is chosen from the thickness range of 30 mm to 150 mm. We find that for continuous operation mode of air conditioners in Wuhan, the optimal economic insulation thickness is 70 mm, whereas when considering only energy and environmental aspects, the OTWRB is 150 mm. These are all larger than the current insulation thickness which is 30 mm. When the weighting efficiencies of the economy, energy, and greenhouse gas emissions are different, the OTWRB varies from 70 mm to 150 mm for continuous operation mode. The different cities have little influence on the OTWRB while the different operation modes of air conditioners have some influence on the OTWRB.

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“…The inexhaustible natural resource of daylight should be properly used to save power consumption, protect human health, and improve work quality [1][2][3]. Sun-deficient areas in China, such as Chongqing and Sichuan, only possess half of the natural light resources of sun-sufficient areas [4].…”

Section: Introductionmentioning

confidence: 99%

Annual Daylight Quality of Typical Classrooms in Sun-Deficient Areas

Guan¹,

Yan²,

He³

et al. 2020

IJSDP

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This paper aims to disclose the daylight features in sun-deficient areas of China. For this purpose, the authors carried out field measurement with annual dynamic analysis on daylight in a university of Chongqing, a typical sun-deficient area. The annual daylight quality was evaluated in details from the angles of temporal and spatial variations. Specifically, the annual daylight data were condensed into 72 similar time periods according to the local academic calendar. The mean illuminance and spatial ratio of areas meeting the illuminance threshold were calculated in each period for two typical classrooms in the university. The results show that, in the south-facing classroom, the mean daylight illuminance on the desktop was below the threshold in winter and in early mornings (before 10:00) and late afternoons (after 16:00) of other seasons; in the north-facing classroom, the mean daylight illuminance on the desktop were below the threshold in virtually all 72 periods. In terms of space, less than 25% of the north-facing classroom and 55% in the south-facing classroom met the illuminance threshold. Compared with the traditional daylight evaluation methods, our strategy realizes a comprehensive and detailed evaluation of indoor daylight quality, shedding new light on reasonable lighting improvement.

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Combined thermal and daylight analysis of a typical public rental housing development to fulfil green building guidance in Hong Kong

Cited by 41 publications

References 26 publications

Modelling the overheating risk in an uniform high-rise building design with a consideration of urban context and heatwaves

Modelling the overheating risk in an uniform high-rise building design with a consideration of urban context and heatwaves

Optimization of Insulation Thickness of External Walls of Residential Buildings in Hot Summer and Cold Winter Zone of China

Annual Daylight Quality of Typical Classrooms in Sun-Deficient Areas

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