Evaluation of Daylight and Cooling Performance of Shading Devices in Residential Buildings in South Korea

Taesub Lim,Woong Seog Yim,Daeung Danny Kim

doi:10.3390/en13184749

Taesub Lim, Woong Seog Yim + Show 1 more

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https://doi.org/10.3390/en13184749

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Abstract

Accounting for more than half of buildings in South Korea, the energy consumed by residential buildings has become a main concern and the cooing demand has rapidly increased. To reduce energy consumption, several passive and active design strategies have generally been applied. However, there has been an increasing demand for high window-to-wall ratios in residential buildings, it is imperative to block sunlight into a building effectively. Focusing on the reduction of cooling energy consumption in a residential building, the present study assessed the daylight and energy performance of shading devices. Among various types of shading devices, the Venetian blind, horizontal louver, light shelf, and egg-crate were selected. The illuminance levels in three different areas in a building were measured. In addition, the annual cooling energy consumption by these shading devices was investigated. As a result, both daylight and energy performance varied with different design options of these shading devices. Because of the slight performance difference among shading devices, the artificial loads of two best shading devices were compared. In sum, the egg-crate shading was the most proper shading device to block sunlight as well as reduce the cooling energy consumption effectively.

Highlights

Accounting for more than half of buildings in South Korea, residential buildings have consumed a significant amount of energy and it has rapidly increased [1]
As one of the main contributors to energy consumption in South Korea, the number of residential building increased and the to energy consumed by residential buildings
Many studies have been conducted to reduce energy consumption in residential residential building has gradually increased and the energy consumed by residential buildings has buildings bymain applying passive and active design solutions

Summary

Introduction

Accounting for more than half of buildings in South Korea (hereafter Korea), residential buildings have consumed a significant amount of energy and it has rapidly increased [1]. More than half of the total building energy consumption was used by residential buildings, which was about. Considering the effort to reduce greenhouse gas emissions, it is necessary to find ways of reducing energy consumption by residential buildings. Most of the energy in the residential building has been used for heating and cooling to maintain thermal comfort. It is necessary to reduce the heating and cooling demand in residential buildings in that the total energy consumption in buildings can be reduced. To reduce the energy for heating and cooling, building envelope-enhancement is initially considered. Advanced materials have been used to improve thermal resistance in building envelopes such as phase change materials, vacuum insulation panels, various types of double pane glazing, etc. The use of shading devices and airtightness improvement can be effective strategies to reduce heating or cooling in buildings [13,14]

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