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Research Article

Evaluating the improvement effect of low-energy strategies on the summer indoor thermal environment and cooling energy consumption in a library building: A case study in a hot-humid and less-windy city of China

Yigang Li1, Jiang He1,2,3( )
College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China
Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Nanning 530004, China
Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education of China, Nanning 530004, China
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Abstract

Public buildings such as libraries consume a vast amount of cooling energy for maintaining a comfortable and stable indoor environment in summer, especially in the hot-humid climate. This study used a case study approach to discuss the effect of low-energy strategies that can be applied to improve indoor thermal environment and cooling energy consumption of library buildings in hot and humid cities like Nanning City (a southern city, China). The use of cooling window shutters (a shutter with the effects of shading and evaporative cooling) and ceiling fans for generating airflow was considered as applicable energy-saving measures in this study, and a university library was selected as the study building in which the two energy-saving measures were employed. The SET* and annual cooling load before and after the adoption of the proposed measures were quantitatively investigated with a building energy consumption simulation software (DesignBuilder). Simulation results showed that the daytime SET* values can be reduced by 3.0 °C and 4.5 °C respectively on a typical summer day after the use of the cooling shutters and ceiling fans. Moreover, the cooling loads can also be decreased by 8.4% and 16.6% respectively. Particularly, the combination of these two measures enabled the daytime SET* value and annual cooling load lower by 7.0 °C and 60.8% respectively.

Keywords

thermal simulationcooling loadindoor thermal comfortcooling shutterindoor air movementhot-humid climate

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Building Simulation
Volume 14 Issue 5,
October 2021
Pages 1423-1437
DOI: 10.1007/s12273-020-0747-6
Cite this article:
Li Y, He J. Evaluating the improvement effect of low-energy strategies on the summer indoor thermal environment and cooling energy consumption in a library building: A case study in a hot-humid and less-windy city of China. Building Simulation, 2021, 14(5): 1423-1437. https://doi.org/10.1007/s12273-020-0747-6

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Received: 31 July 2020
Accepted: 12 November 2020
Published: 12 January 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021
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