Thermal comfort investigation of an outdoor air-conditioned area in a hot and arid environment

Ghаni, Sаud; Bialy, Esmail M.; Bakochristou, Foteini; Gamaledin, Seifelislam Mahmoud Ahmad; Rashwan, Mohammed; Hughes, Ben Richard

doi:10.1080/23744731.2016.1267490

Cited by 18 publications

(13 citation statements)

References 83 publications

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“…As a simplified index, the percentage attached to each range of DI should not be considered as quantitatively robust but rather as a general indicator of increasing proportions of population feeling heat discomfort as the index value increases. This index has also been applied in various regional climatic contexts, including Europe and the Mediterranean area (i.e., Bartzokas et al, 2013;Giles et al, 1990;Poupkou et al, 2011), the Middle East (Epstein & Moran, 2006;Ghani et al, 2017), and Africa (Bady, 2014;Yousif & Tahir, 2013).…”

Section: 1029/2018ef000873mentioning

confidence: 99%

Projected Heat Stress Under 1.5 °C and 2 °C Global Warming Scenarios Creates Unprecedented Discomfort for Humans in West Africa

et al. 2018

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Heat and discomfort indices are applied to the multimodel ensemble mean of COordinated Regional climate Downscaling EXperiment-Africa regional climate model projections to investigate future changes in heat stress and the proportion of human population at risk under 1.5°C and 2°C global warming scenarios over West Africa. The results show that heat stress of category Extreme Caution is projected to extend spatially (up to 25%) over most of the Gulf of Guinea, Sahel, and Sahara desert areas, with different regional coverage during the various seasons. Similarly, the projected seasonal proportion of human population at discomfort substantially increases to more than 50% over most of the region. In particular, in June-August over the Sahel and the western Sahara desert, new areas (15% of West Africa) where most of the population is at risk emerge. This indicates that from 50% to almost everyone over most of the Sahel countries and part of the western Sahara desert is at risk of possible heat cramp, heat exhaustion, and heat stroke in future climate scenarios. These conditions become more frequent and are accompanied by the emergence of days with dangerous heat stress category during which everyone feels discomfort and is vulnerable to a likely heat cramp and heat exhaustion. In general, all the above features are more extended and more frequent in the 2°C than in the 1.5°C scenario. Protective measures are thus required for outdoor workers, occupational settings in hot environments, and people engaged in strenuous activities.

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Section: 1029/2018ef000873mentioning

confidence: 99%

Projected Heat Stress Under 1.5 °C and 2 °C Global Warming Scenarios Creates Unprecedented Discomfort for Humans in West Africa

et al. 2018

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“…6. Although the maximum surface temperature recorded during this period had been that of 50 o C, the indoor air temperature however, was found to be mostly constant, while the slight two degree difference between the lower and higher temperature values was discovered to be resulted from the BIPV window insulation, which had been slightly higher than the recommended thermal comfort as described in ANSI/ASHRAE, 1995 [36]. Apart from the data limitation in the DC output without the usage of an inverter, there were also many differences observed between the measured and the controlled data shown in the maximum power peak tracking (MPPT).…”

Section: Calibration Of Experimental Instrumentsmentioning

confidence: 73%

Experimental Investigation of Overall Energy Performance in Algerian Office Building Integrated Photovoltaic Window under Semi-Arid Climate

Mesloub

Kandar

Lim³

2019

Journal of Daylighting

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Building integrated photovoltaic (BIPV) energy has now become one of the most significant renewable energy alternatives for providing natural daylight and clean energy. As such, this study was conducted for the first time in Algeria to experimentally evaluate the BIPV window energy and lighting energy savings of a typical office building under the semi-arid climate condition. Apart from using the Energy Plus and Integrated Environment Solution-Virtual environment (IES-VE) energy simulation tools in the experimental validation, the daylighting control method and the dynamic Useful Daylight Illuminance (UDI) were also utilized to analyse the daylighting performance as well as the lighting energy of BIPV windows with different transparency levels at various cardinal orientations. The field measurements had revealed the overall energy model to be consistent and in good agreement with the EnergyPlus and the IESVE simulation models, where the tested PV module was found to have provided not only a 20% Visible Light Transmittance (VLT) of uniformed daylight with low illuminance level, but also thermal comfort and a considerable amount of clean energy. The simulated results had demonstrated a substantial improvement in cooling energy and glare reduction of the PV modules as compared to the basemodel, where the only BIPV window configuration was achieved good area of UDI 300-700 lux is facing the South orientation and 30% VLT. In conclusion, the application of the thin film BIPV windows with different transparency and orientation levels can thus be regarded as an effective solution for minimizing the lighting energy consumption through its energy production instead of daylighting utilization.

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“…Furthermore, they discovered the effect of increased outdoor temperature on solar energy generation with decreased efficiency. Ghani et al in [7] presented thermo-physiological models and their applications. The authors explained the existing thermoregulation standards for the entire body and other secluded parts of the body.…”

Section: Introductionmentioning

confidence: 99%

“…Ghani et al . in [7] presented thermo‐physiological models and their applications. The authors explained the existing thermoregulation standards for the entire body and other secluded parts of the body.…”

Section: Introductionmentioning

confidence: 99%

“…The outside air‐conditioned area thermal comfort was presented by Ghani et al . [7] using on‐site observers works, on‐spot climatic measurements, and computational fluid dynamics. The authors designed five special thermal comfort catalogues, namely: (a) wet‐bulb globe temperature index, (b) humidex, (c) mean comfort vote, (d) cooling power index, and (e) discomfort index for thermal comfort measurement.…”

Section: Introductionmentioning

confidence: 99%

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Environment driven consumer EC model incorporating complexities of consumer body dynamics

Ali

Khan

Mokryani

et al. 2019

IET Energy Systems Integration

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Energy consumption (EC) of consumers primarily depends on comfort level (CL) affirmed by brain sensations of the central nervous system. Environmental parameters such as surroundings, relative humidity, air temperature, solar irradiance, air pressure, and cloud cover directly influence consumer body temperature that in return affect blood dynamics perturbing brain comfort sensations. This CL (either in summer, winter, autumn, or spring season) is a function of external environment and internal body variations that force a consumer toward EC. To develop a new concept of consumer's EC, first the authors described environment parameters in detail with relation to surroundings and EC. Considering this, they tabulated a generic relation of consumer's CL with EC and environment temperature. Second, to build an interrelated bond between the environmental effects on consumer body dynamics, they analysed theoretically and mathematically above mutual relations between medical and environmental sciences. Finally, they present their conceptual EC model based on a closed-loop feedback system. This model is a complex non-linear adaptive system with environmental and surrounding parameters as input to the system resulting in an optimised EC, considering consumer CL as a key parameter for the system.

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Thermal comfort investigation of an outdoor air-conditioned area in a hot and arid environment

Cited by 18 publications

References 83 publications

Projected Heat Stress Under 1.5 °C and 2 °C Global Warming Scenarios Creates Unprecedented Discomfort for Humans in West Africa

Projected Heat Stress Under 1.5 °C and 2 °C Global Warming Scenarios Creates Unprecedented Discomfort for Humans in West Africa

Experimental Investigation of Overall Energy Performance in Algerian Office Building Integrated Photovoltaic Window under Semi-Arid Climate

Environment driven consumer EC model incorporating complexities of consumer body dynamics

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