Mohammad Sheikh | Khulna University of Engineering and Technology (original) (raw)
Address: Dhaka, Dhāka, Bangladesh
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Universite Des Sciences Et De La Technologie D'oran Mohamed Boudiaf
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The optimal layout and sizing of duct systems has become more and more a concern for HVAC system ... more The optimal layout and sizing of duct systems has become more and more a concern for HVAC system designers. Although most duct systems are designed either by an HVAC contractor or a consulting engineer, many plant designers often find it necessary to alter a duct system design to correct obvious flaws. Not only duct system modifications are made to clear obstructions, but also they are sometimes made for obvious economic reasons. The original design may include high cost, unnecessary transitions and special fittings. An experienced sheet metal person can quickly spot these anomalies in a duct design. However, modifications to a duct design must be made carefully to ensure that the system will work as intended. Rather than performing initial design or modifying someone else's design, it is a good idea to analyze proposed duct systems with simulation software to ensure that they will work properly. So in this project simulation software is developed to design an economic air conditioning duct system. This software is helpful to determine the duct sizes and pressure losses in each duct section both in main duct sections as well as branch duct sections by following equal friction method and static regain method. It is also used to determine pressure required at blower/fan exit and the capacity required for the blower. When duct-sizing calculations are done manually, it needs a big amount of money and time but by using this software a designer can design a duct system in a fraction of the time required by analytical method.
A cooling system is very important for both man and machine. In general vapor compression refrige... more A cooling system is very important for both man and machine. In general vapor compression refrigeration system and vapor absorption refrigeration system are used for refrigeration purpose. Vortex tube cooling system is a non conventional type of cooling system which is not used widely for cooling purpose. But it has many advantages over the conventional cooling system. In this project attempt has been made to construct a vortex tube with locally available materials. Effects of the number of inlet tangential nozzles, the tube diameter, and the diameter of the inlet nozzle on the temperature reduction in the tube were experimentally investigated. Throughout the project several number of vortex tubes were constructed by locally available materials like PVC pipe for performance test. The temperature drops of the cold air obtained from these experiments were not in good agreement with available data for comparison at a similar scale of separating conditions. The experimental results showed that the vortex tube with two inlet nozzles and cold tube diameter 12.7 mm yielded the highest temperature reduction which was found 4 .
The optimal layout and sizing of duct systems has become more and more a concern for HVAC system ... more The optimal layout and sizing of duct systems has become more and more a concern for HVAC system designers. Although most duct systems are designed either by an HVAC contractor or a consulting engineer, many plant designers often find it necessary to alter a duct system design to correct obvious flaws. Not only duct system modifications are made to clear obstructions, but also they are sometimes made for obvious economic reasons. The original design may include high cost, unnecessary transitions and special fittings. An experienced sheet metal person can quickly spot these anomalies in a duct design. However, modifications to a duct design must be made carefully to ensure that the system will work as intended. Rather than performing initial design or modifying someone else's design, it is a good idea to analyze proposed duct systems with simulation software to ensure that they will work properly. So in this project simulation software is developed to design an economic air conditioning duct system. This software is helpful to determine the duct sizes and pressure losses in each duct section both in main duct sections as well as branch duct sections by following equal friction method and static regain method. It is also used to determine pressure required at blower/fan exit and the capacity required for the blower. When duct-sizing calculations are done manually, it needs a big amount of money and time but by using this software a designer can design a duct system in a fraction of the time required by analytical method.
A cooling system is very important for both man and machine. In general vapor compression refrige... more A cooling system is very important for both man and machine. In general vapor compression refrigeration system and vapor absorption refrigeration system are used for refrigeration purpose. Vortex tube cooling system is a non conventional type of cooling system which is not used widely for cooling purpose. But it has many advantages over the conventional cooling system. In this project attempt has been made to construct a vortex tube with locally available materials. Effects of the number of inlet tangential nozzles, the tube diameter, and the diameter of the inlet nozzle on the temperature reduction in the tube were experimentally investigated. Throughout the project several number of vortex tubes were constructed by locally available materials like PVC pipe for performance test. The temperature drops of the cold air obtained from these experiments were not in good agreement with available data for comparison at a similar scale of separating conditions. The experimental results showed that the vortex tube with two inlet nozzles and cold tube diameter 12.7 mm yielded the highest temperature reduction which was found 4 .