Effect of skylight–roof ratio on warehouse building energy balance and thermal–visual comfort in hot-humid climate area

2020 ◽  
Vol 21 (5) ◽  
pp. 915-923
Author(s):  
Remon Lapisa ◽  
Arwizet Karudin ◽  
M. Martias ◽  
K. Krismadinata ◽  
A. Ambiyar ◽  
...  
Keyword(s):  
Energy Balance ◽  
Building Energy ◽  
Visual Comfort ◽  
Humid Climate ◽  
Hot Humid Climate

scholarly journals Daylighting Performance Assessment of Side-Lit University Lecture Theatres in the Hot-Humid Climate of Makurdi in Nigeria

2020 ◽  
Vol 8 (5) ◽  
pp. 4584-4589
Keyword(s):  
Teaching And Learning ◽  
Digital Camera ◽  
Visual Comfort ◽  
State University ◽  
Humid Climate ◽  
Post Occupancy Evaluation ◽  
Evaluation Approach ◽  
Lighting Conditions ◽  
Lecture Theatre ◽  
Hot Humid Climate

Daylighting is required to enhance visual comfort; whereas its illumination provides renewable functional interior lighting for specific programmes. Hence, this study examines the levels of daylight illumination for teaching and learning in two lecture theatres each located at the Federal University of Agriculture Makurdi (UAM) and Benue State University Makurdi (BSU) in Makurdi, Nigeria. The two buildings selected for the daylighting performance employed post-occupancy evaluation approach. A digital camera was employed to take photographs, whereas digital light meters were employed to evaluate the levels of illumination on the work plane. The results showed that 80% of the study space has inadequate indoor daylight illumination quantity and distribution as well as poor daylight ratios of 1.1and 0.9 for UAM lecture theatre and BSU lecture theatre, respectively Hence, the lighting conditions in the selected buildings fall short of the international lighting benchmarks (IESNA). Therefore, a pragmatic daylight design strategy is required to enhance daylight levels in the lecture theatres for energy-saving and visual comfort as well as onwards design and fusion in the national building code.

scholarly journals The Challenge for Building Integration of Highly Transparent Photovoltaics and Photoelectrochromic Devices

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1929 ◽  
Author(s):  
Alessandro Cannavale ◽  
Francesco Martellotta ◽  
Francesco Fiorito ◽  
Ubaldo Ayr
Keyword(s):  
Energy Balance ◽  
Critical Review ◽  
Final Stage ◽  
Accurate Description ◽  
Technological Evolution ◽  
Visual Comfort ◽  
Stage Of Development ◽  
Research Activities ◽  
Challenges And Opportunities ◽  
Open Issues

This paper holds a critical review of current research activities dealing with smart architectural glazing worldwide. Hereafter, the main trends are analyzed and critically reported, with open issues, challenges, and opportunities, providing an accurate description of technological evolution of devices in time. This manuscript deals with some well-known, highly performing technologies, such as semitransparent photovoltaics and novel photoelectrochromic devices, the readiest, probably, to reach the final stage of development, to disclose the manifold advantages of multifunctional, smart glazing. The complex, overall effects of their building integration are also reported, especially regarding energy balance and indoor visual comfort in buildings.

A dynamic vertical shading optimisation to improve view, visual comfort and operational energy

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mahdi Valitabar ◽  
Mohammadjavad Mahdavinejad ◽  
Henry Skates ◽  
Peiman Pilechiha
Keyword(s):  
High Performance ◽  
Parametric Design ◽  
Design Method ◽  
Building Energy ◽  
Natural Light ◽  
Visual Comfort ◽  
Content Type ◽  
Operational Energy ◽  
Discomfort Glare ◽  
The Impact

PurposeThe aim of this paper is to present a parametric design method to generate optimum adaptive facades regarding occupants' comfort and building energy criteria. According to the literature review, the following questions have arisen to address the research gaps: Is it possible to have the outside view throughout the whole year without discomfort glare by utilising adaptive solar facades (ASFs)? How can architects integrate both view quality and quantity into ASF design? What is the impact of dynamic vertical shading systems mounted on south facades on the outside view, occupants' visual comfort and operational energy? How can we evaluate the view quantity through multi-layer shading systems?Design/methodology/approachIn recent years, there is a surge in demand for fully glazed buildings, motivating both architects and scholars to explore novel ideas for designing adaptive solar facades. Nevertheless, the view performance of such systems has not been fully explored especially when it comes to the effect of dynamic vertical shading systems mounted on south facades. This fact clarifies the need to conduct more research in this field by taking into account the window view and natural light. Consequently, a simulation research is carried out to investigate the impact of a dynamic shading system with three vertical slats used on the south facade of a single office room located in Tehran, on both view quality and quantity, visual comfort and operational energy. The research attempts to reach a balance between the occupant's requirements and building energy criteria through a multi-objective optimisation. The distinctive feature of the proposed method is generating some optimum shading which could only cover the essential parts of the window area. It was detected from the simulation results that the usage of a dynamic vertical shading system with multi slats for south facades compared to common Venetian blinds can firstly, provide four times more view quantity. Secondly, the view quality is significantly improved through enabling occupants to enjoy the sky layer the entire year. Finally, twice more operational energy can be saved while more natural light can enter the indoor environment without glare. The final outcome of this research contributes toward designing high-performance adaptive solar facades.FindingsThis paper proposes a new metric to evaluate the view quantity through a multi-layer shading system. The proposed method makes it clear that the usage of dynamic vertical shading systems with multi-layers mounted on south facades can bring many benefits to both occupants and building energy criteria. The proposed method could (1) provide four times more view quantity; (2) improve view quality by enabling occupants to watch the sky layer throughout the whole year; (3) slash the operational energy by twice; (4) keep the daylight glare probability (DGP) value in the imperceptible range.Research limitations/implicationsThe research limitations that should be acknowledged are ignoring the impact of the adjacent building on sunlight reflection, which could cause discomfort glare issues. Another point regarding the limitations of the proposed optimisation method is the impact of vertical shading systems on users' visual interests. A field study ought to be conducted to determine which one could provide the more desirable outside view: a vertical or horizontal the view. Research on the view performance of ASFs, especially their impact on the quality of view, is sorely lacking.Originality/valueThis paper (1) analyses the performance of dynamic vertical shadings on south facades; (2) evaluates outside view through multi-layer shading systems; and (3) integrates both view quality and quantity into designing adaptive solar facades.

FIELD ASSESSMENT OF BLACK SPOT RESISTANCE IN ROSES IN A HOT HUMID CLIMATE

2010 ◽  
pp. 115-120 ◽  
Author(s):  
D.H. Byrne ◽  
N. Anderson ◽  
M. Orwat ◽  
V. Soules
Keyword(s):  
Black Spot ◽  
Humid Climate ◽  
Field Assessment ◽  
Hot Humid Climate
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