Estimation of Indoor Temperature Increments in Summers Using Heat-Flow Sensors to Assess the Impact of Roof Slab Insulation Methods

Yutong Li (), Atsushi Teramoto, Takaaki Ohkubo and Akihiro Sugiyama
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Yutong Li: Department of Architecture, Graduate School of Advanced Science and Engineering, Hiroshima University, Hiroshima 739-8527, Japan
Atsushi Teramoto: Department of Architecture, Graduate School of Advanced Science and Engineering, Hiroshima University, Hiroshima 739-8527, Japan
Takaaki Ohkubo: Department of Architecture, Graduate School of Advanced Science and Engineering, Hiroshima University, Hiroshima 739-8527, Japan
Akihiro Sugiyama: Technical Service Team, Research & Development Group, Dyflex Co., Ltd., Chiba 273-0027, Japan

Sustainability, 2022, vol. 14, issue 22, 1-23

Abstract: Improving the thermal insulation performance of buildings is crucial for saving energy. Currently, the insulation performance can be quantified based on the thermal resistance and thermal transmittance (U-value). However, for owners, these data are not readily available for the verification of different insulation methods. To address this, a solution could involve establishing a connection between specialized evaluation indicators and temperature, a common physical quantity. In this study, static and dynamic heat-transfer experiments were performed using an environmental simulation chamber and heat-flow sensors. Based on the tests, a simple predictive formula for the heat-flow density over time was established. After analyzing a full-scale building model, six cases of the heat-flow density versus temperature rise in indoor environments were obtained. This approach may aid owners in visually assessing the insulation performance of buildings by establishing a conversion relationship between the heat-flow density and temperature. In addition, the performance of 14 experimental specimens, including self-developed and code-documented thermal insulation materials and construction methods, was evaluated. In the simulations, after turning off indoor cooling equipment for 6 h during hot summers, the average indoor temperature increase for a roof with insulation was only 52% of that without insulation.

Keywords: heat transfer; thermal insulation; heat-flow density; environmental simulation chamber; factory roof slab; temperature rise; indoor thermal environment; heat-flow sensor (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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