Effect of window orientation on the thermal performance of electrochromic glass

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-03-03 DOI:10.1016/j.csite.2025.105990

Jianan Wen, Jian Sun, Xi Meng

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引用次数: 0

Abstract

The utilization of electrochromic glass enables the dynamic adjustment of solar radiation absorption, achieved through the alteration of glass transmittance. This results in enhanced seasonal adaptability of the building and an elevated level of energy efficiency. This study examines the impact of electrochromic glazing on the thermal environment of building interiors, with a particular focus on the influence of composite electrochromic glazing window orientation on this environment. Therefore, two cell models are constructed with normal glass and electrochromic glass, respectively. Transient temperatures of indoor air and two glass surfaces were monitored to reveal the thermal and optical performance of electrochromic glass with considering three window orientations of eastward, southward and westward. The experimental results demonstrate that, in comparison with traditional double-layer glazing, double-layer glazing with electrochromic glass has the potential to significantly reduce the indoor air temperature of the cell model, particularly in the tinted state. The installation of double-layer electrochromic glazing in east, south and west-facing windows under the tinted state has been observed to reduce the average daytime temperatures by 10.44 °C, 9.57 °C and 10.59 °C, respectively, and the maximum daytime temperatures by 24.3 °C, 12.31 °C and 27.16 °C. It can be observed that the orientation of windows has a considerable impact on the cooling benefits of double-layer electrochromic glazing, with the most notable effects observed in west-facing windows, followed by east and south-facing windows. Additionally, there were significant temporal effects. Correlation analysis with meteorological parameters demonstrated that window orientation plays a pivotal role in determining the intensity of solar radiation received by vertical window.

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.