Papers by Arnab Mustafi Arka
Proceedings of the 5th World Congress on Mechanical, Chemical, and Material Engineering, 2019
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AIP Conference Proceedings, 2018
A building either residential or industrial is a combination of the effort of architectural, civi... more A building either residential or industrial is a combination of the effort of architectural, civil and mechanical design. The overall design should be performed by the consideration of cost for the energy used. Energy consumption in a large quantity is used in a building for the ventilation system within the building. The more usage of energy for the ventilation, the more power is consumed and the more cost are required. In this case, if natural ventilation can be improved, the energy and power can be saved significantly. For the feasible ventilation, natural circulation is the main concern here, which is highly dependent on a factor related to the building design known as window to wall ratio abbreviated WWR. If WWR is at the optimum level, then natural ventilation will be improved. Another factor upon which natural ventilation is greatly dependent is the location and orientation of the building in a geographical region and the flow direction of air with respect to the positions of window and other openings of a building. Thereby our main concern here to find out the critical WWR and flow direction with respect to the windows and how energy consumption can be saved from the ventilation system. For the achievement of these targets here, a model of a residential building is designed using the commercial software SOLID WORKS. For the analysis of ventilation, commercial software ANSYS FLUENT was used. Air flow pattern inside the building, related heat transfer, turbulence, path lines of air flow, velocity and temperature profile inside the building was analyzed. The result suggests that as the WWR increases the temperature distribution becomes uniform up to certain limit (here 0.22), after that temperature distribution pattern becomes non-uniform (mainly ≥ 0.3) and with the higher value of WWR (≥ 0.3) as the temperature increases which in turn affects the pattern of air flow creating unusual pattern.
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8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING
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Proceedings of the 5th World Congress on Mechanical, Chemical, and Material Engineering (MCM'19),Lisbon, Portugal – August, 2019, 2019
The demand and scope of the transport refrigeration system, as a part of the food cold chain, is ... more The demand and scope of the transport refrigeration system, as a part of the food cold chain, is likely to increase at a tremendous pace in Bangladesh in the coming years. However, the local transport refrigeration sector is mostly based on retrofitting light-to-medium-duty commercial trucks with refrigerated chambers and emphasizing solely on reducing the chamber temperature to a set value. As a result, performance parameters such as appropriate product storage pattern, clearance within the chamber, airflow distribution, uniformity of temperature, etc. are not maintained following any scientific guideline. The proposed study reports the findings of a Computational Fluid Dynamics (CFD) study on the performance of the local refrigerated transport vehicles, with an aim to propose solutions for improving the existing scenario. Using the knowledge obtained from the mapping of the transport-refrigerated vehicles in Bangladesh, a numerical investigation is carried out to examine the effect of commonly followed product storage and stacking patterns on the refrigeration performance. For the typical Bangladeshi product-loading scenario, it is found that a considerable temperature gradient exists within the chamber due to poor airflow distribution, resulting in hot spots in some locations. The study also includes the examination and comparison of the performance improvement opportunity if standard practices reported in an earlier study is employed. Preliminary results are reported with the ultimate objective of developing a standard product-loading pattern suitable and implementable in the local context.
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AIP Conference Proceedings 2121, 030013 (2019), 2019
Refrigerated transport system plays a vital role in providing the consumption centers such as the... more Refrigerated transport system plays a vital role in providing the consumption centers such as the urban areas of
a country with perishable food products from the production centers, usually located in rural areas. It is one of the most
important parts of the food cold chain and has tremendous potential for improvement in terms of energy savings, fuel
economy and emission characteristics. However, there is a significant lack of knowledge about the existing refrigerated
transport system in Bangladesh, which is largely unstructured with a clear lack of understanding and standard in this
field. Often this leads to an over or under-cooled refrigerated space without any regard to the chilling requirement of the
perishable goods being transported. The current study attempts at a detailed assessment of the existing refrigerated
transport system in Bangladesh. This mapping includes parameters such as the number and type of refrigerated vehicles,
size, design, fuel consumption, type of refrigeration system, refrigeration performance, and energy efficiency. Most
recent data on transport refrigeration vehicles obtained from the government regulatory authority are analyzed
systematically and present trend in the capacity, type, and use of these vehicles are clearly identified. Moreover, a
Computational Fluid Dynamics (CFD) modeling is carried out to examine the effects of commonly practiced storage
pattern on the performance of the transport refrigeration system. It is found that the use of crates in storing products
results in a non-uniform air-flow distribution within the chamber which subsequently results in an uneven and improper
cooling of the stored perishable goods.
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AIP Conference Proceedings 1980, 050011 (2018); doi: 10.1063/1.5044347, 2018
A building either residential or industrial is a combination of the effort of architectural, civ... more A building either residential or industrial is a combination of the effort of architectural, civil and mechanical
design. The overall design should be performed by the consideration of cost for the energy used. Energy consumption in
a large quantity is used in a building for the ventilation system within the building. The more usage of energy for the
ventilation, the more power is consumed and the more cost are required. In this case, if natural ventilation can be
improved, the energy and power can be saved significantly. For the feasible ventilation, natural circulation is the main
concern here, which is highly dependent on a factor related to the building design known as window to wall ratio
abbreviated WWR. If WWR is at the optimum level, then natural ventilation will be improved. Another factor upon
which natural ventilation is greatly dependent is the location and orientation of the building in a geographical region and
the flow direction of air with respect to the positions of window and other openings of a building. Thereby our main
concern here to find out the critical WWR and flow direction with respect to the windows and how energy consumption
can be saved from the ventilation system. For the achievement of these targets here, a model of a residential building is
designed using the commercial software SOLID WORKS. For the analysis of ventilation, commercial software ANSYS
FLUENT was used. Air flow pattern inside the building, related heat transfer, turbulence, path lines of air flow, velocity
and temperature profile inside the building was analyzed. The result suggests that as the WWR increases the temperature
distribution becomes uniform up to certain limit (here 0.22), after that temperature distribution pattern becomes nonuniform
(mainly ≥ 0.3) and with the higher value of WWR (≥ 0.3) as the temperature increases which in turn affects the
pattern of air flow creating unusual pattern.
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Papers by Arnab Mustafi Arka
a country with perishable food products from the production centers, usually located in rural areas. It is one of the most
important parts of the food cold chain and has tremendous potential for improvement in terms of energy savings, fuel
economy and emission characteristics. However, there is a significant lack of knowledge about the existing refrigerated
transport system in Bangladesh, which is largely unstructured with a clear lack of understanding and standard in this
field. Often this leads to an over or under-cooled refrigerated space without any regard to the chilling requirement of the
perishable goods being transported. The current study attempts at a detailed assessment of the existing refrigerated
transport system in Bangladesh. This mapping includes parameters such as the number and type of refrigerated vehicles,
size, design, fuel consumption, type of refrigeration system, refrigeration performance, and energy efficiency. Most
recent data on transport refrigeration vehicles obtained from the government regulatory authority are analyzed
systematically and present trend in the capacity, type, and use of these vehicles are clearly identified. Moreover, a
Computational Fluid Dynamics (CFD) modeling is carried out to examine the effects of commonly practiced storage
pattern on the performance of the transport refrigeration system. It is found that the use of crates in storing products
results in a non-uniform air-flow distribution within the chamber which subsequently results in an uneven and improper
cooling of the stored perishable goods.
design. The overall design should be performed by the consideration of cost for the energy used. Energy consumption in
a large quantity is used in a building for the ventilation system within the building. The more usage of energy for the
ventilation, the more power is consumed and the more cost are required. In this case, if natural ventilation can be
improved, the energy and power can be saved significantly. For the feasible ventilation, natural circulation is the main
concern here, which is highly dependent on a factor related to the building design known as window to wall ratio
abbreviated WWR. If WWR is at the optimum level, then natural ventilation will be improved. Another factor upon
which natural ventilation is greatly dependent is the location and orientation of the building in a geographical region and
the flow direction of air with respect to the positions of window and other openings of a building. Thereby our main
concern here to find out the critical WWR and flow direction with respect to the windows and how energy consumption
can be saved from the ventilation system. For the achievement of these targets here, a model of a residential building is
designed using the commercial software SOLID WORKS. For the analysis of ventilation, commercial software ANSYS
FLUENT was used. Air flow pattern inside the building, related heat transfer, turbulence, path lines of air flow, velocity
and temperature profile inside the building was analyzed. The result suggests that as the WWR increases the temperature
distribution becomes uniform up to certain limit (here 0.22), after that temperature distribution pattern becomes nonuniform
(mainly ≥ 0.3) and with the higher value of WWR (≥ 0.3) as the temperature increases which in turn affects the
pattern of air flow creating unusual pattern.
a country with perishable food products from the production centers, usually located in rural areas. It is one of the most
important parts of the food cold chain and has tremendous potential for improvement in terms of energy savings, fuel
economy and emission characteristics. However, there is a significant lack of knowledge about the existing refrigerated
transport system in Bangladesh, which is largely unstructured with a clear lack of understanding and standard in this
field. Often this leads to an over or under-cooled refrigerated space without any regard to the chilling requirement of the
perishable goods being transported. The current study attempts at a detailed assessment of the existing refrigerated
transport system in Bangladesh. This mapping includes parameters such as the number and type of refrigerated vehicles,
size, design, fuel consumption, type of refrigeration system, refrigeration performance, and energy efficiency. Most
recent data on transport refrigeration vehicles obtained from the government regulatory authority are analyzed
systematically and present trend in the capacity, type, and use of these vehicles are clearly identified. Moreover, a
Computational Fluid Dynamics (CFD) modeling is carried out to examine the effects of commonly practiced storage
pattern on the performance of the transport refrigeration system. It is found that the use of crates in storing products
results in a non-uniform air-flow distribution within the chamber which subsequently results in an uneven and improper
cooling of the stored perishable goods.
design. The overall design should be performed by the consideration of cost for the energy used. Energy consumption in
a large quantity is used in a building for the ventilation system within the building. The more usage of energy for the
ventilation, the more power is consumed and the more cost are required. In this case, if natural ventilation can be
improved, the energy and power can be saved significantly. For the feasible ventilation, natural circulation is the main
concern here, which is highly dependent on a factor related to the building design known as window to wall ratio
abbreviated WWR. If WWR is at the optimum level, then natural ventilation will be improved. Another factor upon
which natural ventilation is greatly dependent is the location and orientation of the building in a geographical region and
the flow direction of air with respect to the positions of window and other openings of a building. Thereby our main
concern here to find out the critical WWR and flow direction with respect to the windows and how energy consumption
can be saved from the ventilation system. For the achievement of these targets here, a model of a residential building is
designed using the commercial software SOLID WORKS. For the analysis of ventilation, commercial software ANSYS
FLUENT was used. Air flow pattern inside the building, related heat transfer, turbulence, path lines of air flow, velocity
and temperature profile inside the building was analyzed. The result suggests that as the WWR increases the temperature
distribution becomes uniform up to certain limit (here 0.22), after that temperature distribution pattern becomes nonuniform
(mainly ≥ 0.3) and with the higher value of WWR (≥ 0.3) as the temperature increases which in turn affects the
pattern of air flow creating unusual pattern.