Deducing the Optimal Control Method for Electrochromic Triple Glazing through an Integrated Evaluation of Building Energy and Daylight Performance

Myunghwan Oh,Jaesung Park,Chulsung Lee,Seungjun Roh

doi:10.3390/en11092205

Myunghwan Oh, Jaesung Park + Show 2 more

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https://doi.org/10.3390/en11092205

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Journal: Energies	Publication Date: Aug 23, 2018
Citations: 14	License type: CC BY 4.0

Affiliation: Korea Testing Laboratory, Hanyang University

Abstract

Electrochromic glass is anticipated as the next generation of solar control glass for construction because it can control the transmittance of the glass itself. This study analyzed building energy and light environment performance by applying electrochromic glass in triple glazing in order to verify both the solar control characteristics of electrochromic glass and its high insulation performance. This paper evaluates the performance of the electrochromic glass developed by our research team in Korea in five control conditions of varying temperatures and solar radiation levels. By analyzing the cooling and heating load, lighting energy, Daylight Glare Index (DGI), and interior illuminance when applying the selected conditions to office buildings, this paper discerns the optimal control conditions for electrochromic glass. To do so, the optical characteristic data of the electrochromic glass was analyzed via an experiment, and the creation of triple glazing for construction was conducted. The performance of electrochromic glass was evaluated by analyzing hourly and yearly data for cooling, heating load, and lighting energy during a typical day in summer and winter. From this analysis, the control condition with an outstanding performance from an energy perspective was identified. The performance of the light environment was assessed, and the EDPI overall evaluation index was used to find the electrochromic glass’ optimum control conditions for integrating energy and light environment.

Highlights

In the midst of global efforts to reduce building energy, numerous studies are being undertaken on the development of such measures in Korea, and energy-related regulations in the country are being tightened
No logical operation is in place, indicating the need for an automatic solar control device that integrates the building energy and environment according to the external atmosphere in its performance consideration [1]
2, the opaque exterior wallofisBuildings composed according to the insulation glass applied to the analysis model is based on the optical properties of electrochromic glass of the Energy Saving Design Standards of Buildings (2016)

Summary

Introduction

In the midst of global efforts to reduce building energy, numerous studies are being undertaken on the development of such measures in Korea, and energy-related regulations in the country are being tightened. Improving solar control regulation and developing the next-generation of solar control devices are urgently needed to create zero-energy buildings— offices with large window area ratios. This is especially the case in countries like Korea, where the summer and winter climatic conditions are distinct and solar radiation has a significant influence on the energy consumption of the office buildings with large window area ratios. No logical operation is in place, indicating the need for an automatic solar control device that integrates the building energy and environment according to the external atmosphere in its performance consideration [1]

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Discussion

Conclusion