Visual Comfort Analysis of Semi-Transparent Perovskite Based Building Integrated Photovoltaic Window for Hot Desert Climate (Riyadh, Saudi Arabia)

Aritra Ghosh,Meriem Ajmi,Mabrouk Touahmia,Abdelhakim Mesloub

doi:10.3390/en14041043

Aritra Ghosh, Meriem Ajmi + Show 2 more

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https://doi.org/10.3390/en14041043

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Abstract

Buildings consume considerable amount of energy to maintain comfortable interior. By allowing daylight, visual comfort inside a building is possible which can enhance the occupant’s health, mood and cognitive performance. However, traditional highly transparent windows should be replaced with semitransparent type window to attain a comfortable daylight inside a building. Evaluation of visual comfort includes both daylight glare and colour comfort analysis. Building integrated photovoltaic (BIPV) type windows are promising systems and can possess a range of semitransparent levels depending on the type of PV used. In this work, the semitransparent Perovskite BIPV windows was investigated by employing daylight glare analysis for an office building located in Riyadh, KSA and three wavelength dependent transmission spectra for colour comfort analysis. The results showed that the transmissions range between 50–70% was optimum for the comfortable daylight for south facing vertical pane BPV-windows. However, excellent colour comfort was attained for the transmission range of 90% which provided glare issues. Colour comfort for 20% transparent Perovskite was compared with contemporary other type of PV which clearly indicated that wavelength dependent transmittance is stronger over single value transmittance.

Highlights

The Buildings sector consumes about 40% of the global energy to maintain buildings’ interior comfort for occupants
At 80% and 90% transmission, Perovskite Building integrated photovoltaic (BIPV) window was not able to control the discomfort glare, where disturbing and intolerable glare clearly appeared leading to visual discomfort
Average visible light transmission was varied from 10% to 90% for Perovskite PV based BIPV window to evaluate the visual comfort for an office building in Riyadh, Kingdom of Saudi Arabia (KSA)

Summary

Introduction

The Buildings sector consumes about 40% of the global energy to maintain buildings’ interior comfort for occupants. In 2019, total energy consumption for building sector reached 128EJ which was 7% higher than in 2010. Because of this high consumption, CO2 emission from building sector increased by 5% compared to 2010 level [1]. To achieve the building interior comfort, energy consumption and greenhouse gas emission due to the buildings sector have increased tremendously over the last decade, and have even exceeded the transport sector consumption [2,3]. To improve the cognitive performance of building occupants, interaction between external world and building interior is essential by allowing daylight [4,5]. Understanding the quality and quantity of daylight in buildings is crucial to satisfy the indoor occupant comfort [6]. Daylighting glare, correlated colour temperature (CCT) and colour rending index (CRI) are the three crucial components to understand the visual comfort [7,8,9]

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