Studying comfort in a room with cold air system using computational fluid dynamics

Youssef, Atef Ben; Mina, Ehab M.; El-Baz, Ahmed; AbdelMessih, Raouf N.

doi:10.1016/j.asej.2016.07.005

Cited by 8 publications

(5 citation statements)

References 4 publications

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“…Sørensen and Nielsen [39] presented the quality control of computational fluid dynamics in indoor environments. Youssef et al [40] conducted CFD study to evaluate the performance of cold air system inside a 2D space. They studied the flow of cold air at different supply temperatures, velocities, and room thermal loads.…”

Section: Cfd Modellingmentioning

confidence: 99%

Experimental Investigation and CFD modelling for Indoor Air Thermal Conditions in Worship Buildings in Egypt: Church and Masjid

Mouneer

Aly

Mina

2022

Engineering Research Journal

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Masjids and Churches are typical worship buildings constructed to serve citizens in Egypt since more over two thousands of years ago. This research classifies the methodology into three methods; i) experimental work, ii) Computational Fluid Dynamics (CFD), and iii) cooling loads analysis. The experiments were performed to measure the temperature distribution on both scaled down models for masjid and church, designed and constructed using 50:1 scale down ratio. Both models were tested at three loading conditions at 33%, 66%, and 100%. CFD modeling was performed to study flow filed of (MSJ-CFD) model with two configurations 1, 2, each at three different cases. The summative cooling load profiles give that only is presented on the connected load of common district cooling plant which dedicated to serve worship buildings consist of Masjid and Church. The comparison between results of both experimental and CFD investigations are in good agreement at their different locations and they give that the average air temperatures inside both experimental and CFD models at 19 o C for 33% load and Case 1, 22 o C for 66% load and Case 2, and 24 o C for 100 % load and Case 3, respectively. The results of summative cooling load profiles give that for maximum expected total load design for both buildings together design case can be reduced to 160 % of only one building of them, instead of 200% in normal standalone case.The conclusions are summarized to help decision making during planning and design stages either for Church or Masjid.

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Section: Cfd Modellingmentioning

confidence: 99%

Experimental Investigation and CFD modelling for Indoor Air Thermal Conditions in Worship Buildings in Egypt: Church and Masjid

Mouneer

Aly

Mina

2022

Engineering Research Journal

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“…2) indicates the PMV distribution for introducing the supply air with 10℃ and 0.2 m/s, and total heat loads of 68.2 W/m 2 boundary conditions. These conditions were recommended by [2] to achieve an average room velocity of 0.323 m/s and an ADPI of 98.2%. According to the study, cold draught formation is reduced with the assumption of perfectly mixed air.…”

Section: Figure (mentioning

confidence: 99%

“…Thus, the supply duct size, fan speed and energy consumption will be reduced. According to Youssef et al [2], the supply airflow for a cold air distribution system can be reduced 30-40% compared to conventional cooling systems. Cold Air Distribution thermal comfort criteria have been evaluated based on Air Diffusion Performance Index (ADPI) [9][10][11], which considers averaged air velocity as a sole criterion of thermal comfort.…”

Section: Introductionmentioning

confidence: 99%

Thermal Comfort Simulation for Cold Air Distribution Systems by a User Defined Predictive Mean Vote Index

Nourehan¹,

Wahba²,

Rismanchi³

et al. 2022

Preprint

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“…The thermal boundary condition was considered convective for all walls. Data for velocity inlet was considered based on [24,25]. The free stream temperature was, like in the other simulations made, assumed.…”

Section: Model 1: 2 Nd Simulationmentioning

confidence: 99%

Impact of Heated Air Indirectly Produced by Photovoltaic Panels on Indoor Thermal Comfort

Oliveira

Rodrigues

Guimarães

et al. 2022

DFMA

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Climate change is one of the most debated issues today around the world, given its global impact. The construction industry in the European Union (EU) accounts for 40% of energy consumption and 36% of greenhouse gas emissions. Thus, the continuous improvement of energy efficiency in buildings plays a key role in achieving the carbon neutrality goal by 2050. At a time when the irreversible point of global warming may have already been reached, change becomes urgent, with one of the solutions being the use of renewable energies. Among renewable energies, solar is considered not only one of the most promising ones but also one of the energies with the greatest potential growth. The accelerated use of solar PV allows a reduction of carbon dioxide of approximately 4.9 gigatonnes. In the last decades, solar panels presented a great improvement in their efficiency and power output over and, in addition to the production of electricity, their heat can also be harnessed. Therefore, the objective of this work is to study a photovoltaic panel solution in which the heat produced indirectly by it contribution to the heating of a house and, consequently, to thermal comfort. In this work, it was analysed the feasibility of a PV solution that intends to take advantage of the hot air, indirectly produced by it, for subsequent heating of a house. Numerical simulations were performed using Ansys® Fluent, Release 18.1, software and considering a 3D model of a house with PV panels installed in the roof. The results showed the solution under study is not feasible in winter, since solar radiation is not enough for heating using this contribution. However, this solution, although not avoiding the use of other heating means, can help in heating, contributing to the reduction of some needs.

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Studying comfort in a room with cold air system using computational fluid dynamics

Cited by 8 publications

References 4 publications

Experimental Investigation and CFD modelling for Indoor Air Thermal Conditions in Worship Buildings in Egypt: Church and Masjid

Experimental Investigation and CFD modelling for Indoor Air Thermal Conditions in Worship Buildings in Egypt: Church and Masjid

Thermal Comfort Simulation for Cold Air Distribution Systems by a User Defined Predictive Mean Vote Index

Impact of Heated Air Indirectly Produced by Photovoltaic Panels on Indoor Thermal Comfort

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