Design and evaluation of thermal insulation of air layer for sentry building envelopes

IF 3.2 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Indoor and Built Environment Pub Date : 2024-03-20 DOI:10.1177/1420326x241240107

Zhu Chang, Haiguo Yin, Yuekun Han, Linfeng Liang

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Abstract

The prevalence of small-scale structures, such as sentry buildings, has become widespread, with many of these buildings exposed to the outdoor environment and exhibiting suboptimal thermal insulation in their envelopes. Through a comprehensive study of outdoor disturbances, the most unfavourable envelope was identified. In light of this finding, we have designed static air layer sentry buildings (SAL-SB) and dynamic air layer sentry buildings (DAL-SB). The study conducted experiments and numerical simulations to evaluate the impact of air layer thickness, vent opening forms, and inlet velocities on the thermal insulation of sentry buildings. The results showed that both the SAL and DAL effectively improved thermal insulation, and a thickness of 25 cm has been found to offer the best thermal insulation. However, considering the balance between thermal insulation and cost-effectiveness, a thickness of 15 cm is recommended. Additionally, for DAL, an inlet velocity of 3 m/s is the threshold for switching the heat transfer direction on the roof. These findings provide novel insights into enhancing the thermal environment.

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哨兵建筑围护结构空气层隔热设计与评估

小型建筑（如哨所建筑）已成为一种普遍现象，其中许多建筑都暴露在室外环境中，其围护结构的隔热性能也不尽人意。通过对室外干扰的全面研究，我们确定了最不利的围护结构。根据这一发现，我们设计了静态空气层哨兵建筑（SAL-SB）和动态空气层哨兵建筑（DAL-SB）。研究通过实验和数值模拟，评估了空气层厚度、通风口开口形式和入口速度对哨兵建筑隔热性能的影响。结果表明，SAL 和 DAL 都能有效提高隔热性能，其中 25 厘米的厚度具有最佳隔热性能。不过，考虑到隔热性和成本效益之间的平衡，建议厚度为 15 厘米。此外，对于 DAL 来说，3 米/秒的入口速度是切换屋顶传热方向的临界值。这些发现为改善热环境提供了新的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Indoor and Built Environment 环境科学-工程：环境

CiteScore

6.40

自引率

25.00%

发文量

130

审稿时长

2.6 months

期刊介绍： Indoor and Built Environment publishes reports on any topic pertaining to the quality of the indoor and built environment, and how these might effect the health, performance, efficiency and comfort of persons living or working there. Topics range from urban infrastructure, design of buildings, and materials used to laboratory studies including building airflow simulations and health effects. This journal is a member of the Committee on Publication Ethics (COPE).