Optimization of the wall thermal insulation characteristics based on the intermittent heating operation

Meng, Xi; Huang, Yu-Feng; Cao, Ye; Gao, Yawen; Hou, Cheng‐Lin; Zhang, Lili; Shen, Qiong

doi:10.1016/j.cscm.2018.e00188

Cited by 26 publications

(17 citation statements)

References 18 publications

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“…Meanwhile, the experimental results of Zhang et al (2017) showed that the interior thermal insulation wall had the smallest heat flow value, which was less 35%–86% than the exterior thermal insulation wall and the sandwich thermal insulation wall under air-conditioning intermittent operation. The similar conclusions were obtained by the experimental research of Meng et al (2018b) on the thermal performance analysis of interior walls under heating intermittent operation in the same experimental platform with Zhang et al (2017).…”

Section: Introductionsupporting

confidence: 84%

“…Meng (2016) investigated air-conditioning operation behaviors in different climate zones and put forward the typical air-conditioning intermittent operation models suitable for the thermal environment requirement of China. Based on the proposed intermittent operation, the energy conservation optimization of envelops has been done (Meng et al, 2018b(Meng et al, , 2018cZhang et al, 2017). Meng et al (2018c) compared thermal performance of five typical wall insulation forms with the same heat transfer coefficient under air-conditioning intermittent operation and proposed that the interior insulation was more suitable for the wall insulation form with the highest energy-saving ratio of 52%-65%.…”

Section: Introductionmentioning

confidence: 99%

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Thermal performance optimization of building floors under air-conditioning intermittent operation by numerical simulation

Meng

Wang

et al. 2019

Journal of Building Physics

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Under air-conditioning intermittent operation, there may be the large difference of air temperatures in two adjacent rooms due to different operation behavior, and thereby, interior envelops may cause great heat loss. Under this condition, floors may become the most vulnerable spot of the room heat preservation due to their large proportion in interior envelops and poor thermal insulation. To optimize the thermal performance of floors, three floor models were built to compare their thermal performance characteristics under air-conditioning intermittent operation, while a heat transfer model was built by the finite volume method and verified by experimental data. The results showed that an expanded polystyrene layer located close to the upper surface can improve the thermal performance of the bottom floor, while the continuous integration of an air space ceiling placed close to the lower surface can improve the thermal performance of the top floor obviously. The daily cooling load formed by the cast-in-place-reinforced concrete floor integrated with the expanded polystyrene layer and the air space ceiling can reduce the daily cooling load by 53.27% and 47.00%, compared with the cast-in-place-reinforced concrete floor and the cast-in-place-reinforced concrete floor only integrated with the expanded polystyrene layer.

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Section: Introductionsupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Thermal performance optimization of building floors under air-conditioning intermittent operation by numerical simulation

Meng

Wang

et al. 2019

Journal of Building Physics

Self Cite

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“…The position selected for thermal insulation within the external wall depends greatly on the climatic conditions. 39 For regions with continuous cooling loads, external insulation is more advisable. 16,37 Additionally, in the US six different climatic conditions were investigated 38 and it was found that external insulation was more effective than internal.…”

Section: Resultsmentioning

confidence: 99%

Investigation into energy performance of a school building in a hot climate: Optimum of window-to-wall ratio

Alwetaishi

Taki

2019

Indoor and Built Environment

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Global attention is currently focussed on developing techniques to improve the thermal performance of buildings to provide indoor comfort with minimum reliance on energy load. Several studies have investigated building facade, materials used and other factors involved in building design. The aim of this study is to examine the impact of thermal insulation, shading devices, window-to-wall ratio (WWR) and a combination of these factors in a prototype school building design in the warm climate city of Taif, Saudi Arabia. The study used various methods classified into two main phases. The first phase involved on-site observation where both thermal imaging and regular cameras were used to examine the influence of orientation on glazing as a baseline. The second phase involved advanced software investigations with 2D AutoCAD, 3D Revit and computer modelling for energy evaluation and daylight factor. A detailed framework was introduced to examine current school buildings and to improve the future designs of prototype school buildings. The study revealed that a combination of applying thermal insulation along with minimising WWR is required in existing buildings within hot and dry regions. Furthermore, it was recommended that WWR should not exceed 35%, 25% and 20% for northwest, southeast and southwest building facades, respectively.

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“…They indicated that outside insulation was more efficient in energy saving that inside insulation. Meng et al (2018) also indicated the better performance of the outside insulators for wall thermal insulation, compared to inside insulation. Results of this study also indicated that forecasting energy consumption by considering the construction conditions during the design stage can help to choose the best materials and construction methods for a given project as also emphasized by Zardo et al (2019).…”

Section: 312mentioning

confidence: 96%

Applicability of Building Information Modelling (BIM) in the Sustainable Design of Commercial and Office Buildings. A Case Study from Tehran, Iran

Nemati¹,

Aminnejad²,

Lork³

2020

JSSP

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Optimization of the wall thermal insulation characteristics based on the intermittent heating operation

Cited by 26 publications

References 18 publications

Thermal performance optimization of building floors under air-conditioning intermittent operation by numerical simulation

Thermal performance optimization of building floors under air-conditioning intermittent operation by numerical simulation

Investigation into energy performance of a school building in a hot climate: Optimum of window-to-wall ratio

Applicability of Building Information Modelling (BIM) in the Sustainable Design of Commercial and Office Buildings. A Case Study from Tehran, Iran

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