USE OF COMPUTATIONAL FLUID DYNAMIC TO PREDICT AIRFLOW AND TEMPERATURE DISTRIBUTION IN A RESIDENTIAL BUILDING WITH AN UNDER FLOOR AIR DISTRIBUTION SYSTEM

A hydrogen reformer furnace is a combustion chamber used to supply heat for the catalytic process that converts natural gas into hydrogen. The reforming reaction that happens inside the catalyst tubes is endothermic and requiring high levels of heat input. The combustion process in the hydrogen reformer furnace provides the heat to maintain the chemical reaction inside the tubes. Consequently, heat control in the hydrogen reformer furnace is one of the most important factors for the catalytic reforming process. The previous investigation indicates the uneven heat distribution inside the furnace has caused the aging issue of catalyst tubes. Hence, optimization of heat distribution inside the furnace is a vital step of the catalytic reforming process. Utilizing the multiphase and non-premixed model of CFD (Computational Fluid Dynamic), the thermal behavior inside the furnace has been investigated. Results revealed that both the gaps on the sidewall of the tunnel and the location of air distribution wall have impact on the temperature distribution of catalyst tubes. The performance of each configuration with different parameters is carried out to provide a great deal of insight for industry field.

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A CFD analysis of room aspect ratio on the effect of buoyancy and room air flow

Thermal Science ◽

10.2298/tsci0704079t ◽

2007 ◽

Vol 11 (4) ◽

pp. 79-94 ◽

Cited By ~ 2

Author(s):

Brajesh Tripathi ◽

Moulic Sandipan ◽

Late Arora

Keyword(s):

Temperature Distribution ◽

Distribution System ◽

Air Distribution ◽

Cooling Load ◽

Cfd Analysis ◽

Uniform Temperature ◽

Air Volume ◽

Recent Developments ◽

Careful Design ◽

Occupied Zone

Comfort conditions in air-conditioned rooms require that temperature in the occupied zone should not vary by more than 1?C and velocity, every where in the room, should be less than 0.15 m/s so that occupants do not feel draft. Recent developments in providing effective insulation and making leak tight buildings are considerably reduced the cooling load requirements and the supply airflow rates. Obtaining uniform temperature distribution with reduced air volume flow rates requires careful design of air distribution system. This study aims to find velocity and temperature distribution in the room towards this end.

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Simulasi Numerik Karakteristik Pembakaran Pada Tangentially Fired Boiler Dengan Variasi Sudut Yaw

SPECTA Journal of Technology ◽

10.35718/specta.v3i3.57 ◽

2019 ◽

Vol 3 (3) ◽

pp. 44-56

Author(s):

Rindra Hosanova

Keyword(s):

Temperature Distribution ◽

Computational Fluid Dynamic ◽

Consumption Rate ◽

Fluid Dynamic ◽

Energy Sources ◽

Temperature Deviation ◽

Boiler Efficiency ◽

Coal Reserves ◽

Yaw Angle

Coal is one of the energy sources that widely used for electricity, the age of coal reserves only remain 56 years, so it is necessary to make a study to reduce the consumption rate of coal with make an improvement on boiler efficiency which use tangentially fired boiler because it has good combustion. There are a problem in this type of boiler such as unbalance temperature and temperature deviation in superheaters and reheaters of the boiler. This research is made to study the effect of yaw angle modification to temperature in boiler. Method that used in this research is Computational Fluid Dynamic (CFD). Coal yaw angle modification in this research are +5º, 0º, -5º, -10º, dan -15º. Coal yaw angle modification have an effect to temperature distribution, wider yaw angle then larger the temperature deviation. The best coal yaw angle configuration is at -5º because it has the least temperature deviation on the upper furnace which minimize the risk of overheat on superheaters and reheaters. Keywords: CFD, yaw angle, tangentially fired boiler

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Effect of Buoyancy on Room Air Flow

Volume 2, Parts A and B ◽

10.1115/ht-fed2004-56878 ◽

2004 ◽

Author(s):

B. Tripathi ◽

R. C. Arora ◽

S. G. Moulic

Keyword(s):

Temperature Distribution ◽

Distribution System ◽

Coanda Effect ◽

Air Distribution ◽

Air Volume ◽

Recent Developments ◽

Coandǎ Effect ◽

The Right ◽

Careful Design ◽

Occupied Zone

Thermal comfort and ventilation needs of spaces are met by supplying “conditioned” air, which is a blend of outdoor and recirculated air that has been filtered, heated or cooled, and sometimes humidified or dehumidified. Comfort conditions in air-conditioned rooms require that temperature in the occupied zone should not vary by more than 1°C and velocity, every where in the room, should be less than 0.15 m/s so that occupants do not feel draft. Recent developments in providing effective insulation and making leak tight building shell have considerably reduced the cooling load requirements and the supply airflow rates. Obtaining uniform temperature distribution with reduced air volume flow rates requires careful design of air distribution system. This study aims to find velocity and temperature distribution in the room towards this end. Coanda effect, effect of buoyancy and wall boundary layers has been observed in this investigation. The Coanda effect is observed in all the cases of laminar flow. Cold fluid enters in the room near the ceiling, the flow attaches with the ceiling, comes down along the right wall and goes out from outlet.

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Investigation of Syngas Combustion at Variable Methane Composition in Can Combustor Using CFD

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1016.592 ◽

2014 ◽

Vol 1016 ◽

pp. 592-596

Author(s):

Norhaslina Mat Zian ◽

Hasril Hasini ◽

Nur Irmawati Om

Keyword(s):

Heat Flux ◽

Carbon Monoxide ◽

Temperature Distribution ◽

Computational Fluid Dynamic ◽

Fluid Dynamic ◽

Flame Temperature ◽

Gas Combustion ◽

Synthetic Gas ◽

Syngas Combustion ◽

Natural Gas Combustion

This paper describes the analysis of the fundamental effect of synthetic gas combustion in a can-type combustor using Computational Fluid Dynamic(CFD). Emphasis is given towards the effect of variation of methane to the flame profile, temperature distribution and heat flux in the combustor. In this study, the composition of hydrogen in the syngas was fixed at 30% while methane and carbon monoxide were varied. Results show that the flame temperature and NOxemissions are highly dependent on the composition of methane in the syngas fuel. Nevertheless, the overall NOxemission for all cases is relatively lower than the conventional pure natural gas combustion.

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