The Experts below are selected from a list of 16095 Experts worldwide ranked by ideXlab platform
Richard Karl Strand - One of the best experts on this subject based on the ideXlab platform.
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thermal performance evaluation of hybrid Heat source radiant system using a concentrate Tube Heat Exchanger
Energy and Buildings, 2014Co-Authors: Young Tae Chae, Richard Karl StrandAbstract:Abstract This study developed a new radiant system concept having a concentric Tube Heat Exchanger embedded in a radiant panel and evaluated the system characteristics. The concentric Tube Heat Exchanger allows two fluids, air and water, to flow in the same direction. The outdoor air for the space ventilation requirement passes through an inner Tube. The primary Heat transfer medium, water, flows through the outer Tube exchanging Heat with both radiant panel and air Tube. Two fluids would have an identical temperature condition by the characteristics of the Heat Exchanger. The system configuration enables simultaneous satisfaction of the space sensible loads and ventilation requirement. It has also flexibility to use outdoor air directly at night to reduce any Heat built up during the day in the thermal mass. A numerical analysis model based on computational fluid dynamics (CFD) has evaluated this conceptual system. Comparing this new system with the performance of a typical system incorporated with a dedicated outdoor air system (DOAS), the proposed system is shown to provide a more closed the room set temperature condition and a better local thermal environment. In addition, the developed system can improve the performance of the night ventilation operation using nocturnal outdoor air.
A K Datta - One of the best experts on this subject based on the ideXlab platform.
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a computer based iterative solution for accurate estimation of Heat transfer coefficients in a helical Tube Heat Exchanger
Journal of Food Engineering, 2003Co-Authors: P K Sahoo, Md I A Ansari, A K DattaAbstract:An iterative technique is developed and reported for accurate estimation of Heat transfer coefficients in a helical triple Tube Heat Exchanger. Based on the experimental temperature rise of whole milk in a helical triple Tube Heat Exchanger, accurate values of film Heat transfer coefficients and overall Heat transfer coefficients based on the outside area of the innermost Tube and the inside area of the middle annulus are obtained from first principles. Three different flow rates of milk were used giving rise to three Reynolds numbers. The procedure described can be applied to any Heat Exchanger with minor modifications, if necessary.
Asghar B. Rahimi - One of the best experts on this subject based on the ideXlab platform.
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Enhance Heat transfer for phase-change materials in triplex Tube Heat Exchanger with selected arrangements of fins
Applied Thermal Engineering, 2017Co-Authors: H. Eslamnezhad, Asghar B. RahimiAbstract:The use of new energy resources and inventing new methods for the sake of decline of energy usage arealways important. The use of energy storage systems not only reduces energy consumption but also enhances system performance as well. One of the new and efficient methods in the field of thermal energy storage is use of phase-change materials that have high latent Heat. In this paper, enhancement of Heat transfer method using rectangular fin to melt the phase-change material in a triplex Tube Heat Exchanger has been investigated numerically. A two-dimensional numerical model using fluent software is chosen and conduction and natural convection are taken into account in this simulation. The arrangement of the rectangular fins along the triplex Tube Heat Exchanger is one of the most influential factors in the process of melting which has been studied and also the best type of this arrangement to increase efficiency of Heat Exchanger and reduce the time of melting of the phase-change material have been suggested in the form of different proposed models.
Young Tae Chae - One of the best experts on this subject based on the ideXlab platform.
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thermal performance evaluation of hybrid Heat source radiant system using a concentrate Tube Heat Exchanger
Energy and Buildings, 2014Co-Authors: Young Tae Chae, Richard Karl StrandAbstract:Abstract This study developed a new radiant system concept having a concentric Tube Heat Exchanger embedded in a radiant panel and evaluated the system characteristics. The concentric Tube Heat Exchanger allows two fluids, air and water, to flow in the same direction. The outdoor air for the space ventilation requirement passes through an inner Tube. The primary Heat transfer medium, water, flows through the outer Tube exchanging Heat with both radiant panel and air Tube. Two fluids would have an identical temperature condition by the characteristics of the Heat Exchanger. The system configuration enables simultaneous satisfaction of the space sensible loads and ventilation requirement. It has also flexibility to use outdoor air directly at night to reduce any Heat built up during the day in the thermal mass. A numerical analysis model based on computational fluid dynamics (CFD) has evaluated this conceptual system. Comparing this new system with the performance of a typical system incorporated with a dedicated outdoor air system (DOAS), the proposed system is shown to provide a more closed the room set temperature condition and a better local thermal environment. In addition, the developed system can improve the performance of the night ventilation operation using nocturnal outdoor air.
P K Sahoo - One of the best experts on this subject based on the ideXlab platform.
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a computer based iterative solution for accurate estimation of Heat transfer coefficients in a helical Tube Heat Exchanger
Journal of Food Engineering, 2003Co-Authors: P K Sahoo, Md I A Ansari, A K DattaAbstract:An iterative technique is developed and reported for accurate estimation of Heat transfer coefficients in a helical triple Tube Heat Exchanger. Based on the experimental temperature rise of whole milk in a helical triple Tube Heat Exchanger, accurate values of film Heat transfer coefficients and overall Heat transfer coefficients based on the outside area of the innermost Tube and the inside area of the middle annulus are obtained from first principles. Three different flow rates of milk were used giving rise to three Reynolds numbers. The procedure described can be applied to any Heat Exchanger with minor modifications, if necessary.
