The Experts below are selected from a list of 63 Experts worldwide ranked by ideXlab platform
Claudio Melo - One of the best experts on this subject based on the ideXlab platform.
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Air-side heat transfer and pressure drop characteristics of accelerated flow evaporators
International Journal of Refrigeration-revue Internationale Du Froid, 2011Co-Authors: Paulo J. Waltrich, Christian J.l. Hermes, Jader R. Barbosa, Claudio MeloAbstract:We investigate an alternative tube-fin evaporator design (accelerated flow evaporator, AFE) in which the air-side local heat transfer coefficient is increased due to a progressive reduction of the Free-Flow Area. For a given heat transfer rate, this enhancement is expected to partially compensate the decrease in surface Area, which reduces the evaporator material cost. The air-side thermal-hydraulic behavior of nine AFEs was determined experimentally, and a calculation method that relies on j and f correlations for plain tube-fin heat exchangers and on mass and momentum balances has been proposed. The method enables the calculation of the by-pass fraction associated with the air stream through the clearance between the tube bank and the outer edge of the fins. The agreement between the model, which introduces no additional fitting parameters, and the experiments is within ±10% for all heat transfer data and ±15% for the majority of the pressure drop data.
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Air-side heat transfer and pressure drop characteristics of accelerated flow evaporators
International Journal of Refrigeration, 2011Co-Authors: Paulo J. Waltrich, Christian J.l. Hermes, Jader R. Barbosa, Claudio MeloAbstract:We investigate an alternative tube-fin evaporator design (accelerated flow evaporator, AFE) in which the air-side local heat transfer coefficient is increased due to a progressive reduction of the Free-Flow Area. For a given heat transfer rate, this enhancement is expected to partially compensate the decrease in surface Area, which reduces the evaporator material cost. The air-side thermal-hydraulic behavior of nine AFEs was determined experimentally, and a calculation method that relies on j and f correlations for plain tube-fin heat exchangers and on mass and momentum balances has been proposed. The method enables the calculation of the by-pass fraction associated with the air stream through the clearance between the tube bank and the outer edge of the fins. The agreement between the model, which introduces no additional fitting parameters, and the experiments is within ±10% for all heat transfer data and ±15% for the majority of the pressure drop data. © 2010 Elsevier Ltd and IIR. All rights reserved.
Paulo J. Waltrich - One of the best experts on this subject based on the ideXlab platform.
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Air-side heat transfer and pressure drop characteristics of accelerated flow evaporators
International Journal of Refrigeration-revue Internationale Du Froid, 2011Co-Authors: Paulo J. Waltrich, Christian J.l. Hermes, Jader R. Barbosa, Claudio MeloAbstract:We investigate an alternative tube-fin evaporator design (accelerated flow evaporator, AFE) in which the air-side local heat transfer coefficient is increased due to a progressive reduction of the Free-Flow Area. For a given heat transfer rate, this enhancement is expected to partially compensate the decrease in surface Area, which reduces the evaporator material cost. The air-side thermal-hydraulic behavior of nine AFEs was determined experimentally, and a calculation method that relies on j and f correlations for plain tube-fin heat exchangers and on mass and momentum balances has been proposed. The method enables the calculation of the by-pass fraction associated with the air stream through the clearance between the tube bank and the outer edge of the fins. The agreement between the model, which introduces no additional fitting parameters, and the experiments is within ±10% for all heat transfer data and ±15% for the majority of the pressure drop data.
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Air-side heat transfer and pressure drop characteristics of accelerated flow evaporators
International Journal of Refrigeration, 2011Co-Authors: Paulo J. Waltrich, Christian J.l. Hermes, Jader R. Barbosa, Claudio MeloAbstract:We investigate an alternative tube-fin evaporator design (accelerated flow evaporator, AFE) in which the air-side local heat transfer coefficient is increased due to a progressive reduction of the Free-Flow Area. For a given heat transfer rate, this enhancement is expected to partially compensate the decrease in surface Area, which reduces the evaporator material cost. The air-side thermal-hydraulic behavior of nine AFEs was determined experimentally, and a calculation method that relies on j and f correlations for plain tube-fin heat exchangers and on mass and momentum balances has been proposed. The method enables the calculation of the by-pass fraction associated with the air stream through the clearance between the tube bank and the outer edge of the fins. The agreement between the model, which introduces no additional fitting parameters, and the experiments is within ±10% for all heat transfer data and ±15% for the majority of the pressure drop data. © 2010 Elsevier Ltd and IIR. All rights reserved.
Christian J.l. Hermes - One of the best experts on this subject based on the ideXlab platform.
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Air-side heat transfer and pressure drop characteristics of accelerated flow evaporators
International Journal of Refrigeration-revue Internationale Du Froid, 2011Co-Authors: Paulo J. Waltrich, Christian J.l. Hermes, Jader R. Barbosa, Claudio MeloAbstract:We investigate an alternative tube-fin evaporator design (accelerated flow evaporator, AFE) in which the air-side local heat transfer coefficient is increased due to a progressive reduction of the Free-Flow Area. For a given heat transfer rate, this enhancement is expected to partially compensate the decrease in surface Area, which reduces the evaporator material cost. The air-side thermal-hydraulic behavior of nine AFEs was determined experimentally, and a calculation method that relies on j and f correlations for plain tube-fin heat exchangers and on mass and momentum balances has been proposed. The method enables the calculation of the by-pass fraction associated with the air stream through the clearance between the tube bank and the outer edge of the fins. The agreement between the model, which introduces no additional fitting parameters, and the experiments is within ±10% for all heat transfer data and ±15% for the majority of the pressure drop data.
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Air-side heat transfer and pressure drop characteristics of accelerated flow evaporators
International Journal of Refrigeration, 2011Co-Authors: Paulo J. Waltrich, Christian J.l. Hermes, Jader R. Barbosa, Claudio MeloAbstract:We investigate an alternative tube-fin evaporator design (accelerated flow evaporator, AFE) in which the air-side local heat transfer coefficient is increased due to a progressive reduction of the Free-Flow Area. For a given heat transfer rate, this enhancement is expected to partially compensate the decrease in surface Area, which reduces the evaporator material cost. The air-side thermal-hydraulic behavior of nine AFEs was determined experimentally, and a calculation method that relies on j and f correlations for plain tube-fin heat exchangers and on mass and momentum balances has been proposed. The method enables the calculation of the by-pass fraction associated with the air stream through the clearance between the tube bank and the outer edge of the fins. The agreement between the model, which introduces no additional fitting parameters, and the experiments is within ±10% for all heat transfer data and ±15% for the majority of the pressure drop data. © 2010 Elsevier Ltd and IIR. All rights reserved.
Jader R. Barbosa - One of the best experts on this subject based on the ideXlab platform.
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Air-side heat transfer and pressure drop characteristics of accelerated flow evaporators
International Journal of Refrigeration-revue Internationale Du Froid, 2011Co-Authors: Paulo J. Waltrich, Christian J.l. Hermes, Jader R. Barbosa, Claudio MeloAbstract:We investigate an alternative tube-fin evaporator design (accelerated flow evaporator, AFE) in which the air-side local heat transfer coefficient is increased due to a progressive reduction of the Free-Flow Area. For a given heat transfer rate, this enhancement is expected to partially compensate the decrease in surface Area, which reduces the evaporator material cost. The air-side thermal-hydraulic behavior of nine AFEs was determined experimentally, and a calculation method that relies on j and f correlations for plain tube-fin heat exchangers and on mass and momentum balances has been proposed. The method enables the calculation of the by-pass fraction associated with the air stream through the clearance between the tube bank and the outer edge of the fins. The agreement between the model, which introduces no additional fitting parameters, and the experiments is within ±10% for all heat transfer data and ±15% for the majority of the pressure drop data.
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Air-side heat transfer and pressure drop characteristics of accelerated flow evaporators
International Journal of Refrigeration, 2011Co-Authors: Paulo J. Waltrich, Christian J.l. Hermes, Jader R. Barbosa, Claudio MeloAbstract:We investigate an alternative tube-fin evaporator design (accelerated flow evaporator, AFE) in which the air-side local heat transfer coefficient is increased due to a progressive reduction of the Free-Flow Area. For a given heat transfer rate, this enhancement is expected to partially compensate the decrease in surface Area, which reduces the evaporator material cost. The air-side thermal-hydraulic behavior of nine AFEs was determined experimentally, and a calculation method that relies on j and f correlations for plain tube-fin heat exchangers and on mass and momentum balances has been proposed. The method enables the calculation of the by-pass fraction associated with the air stream through the clearance between the tube bank and the outer edge of the fins. The agreement between the model, which introduces no additional fitting parameters, and the experiments is within ±10% for all heat transfer data and ±15% for the majority of the pressure drop data. © 2010 Elsevier Ltd and IIR. All rights reserved.
S B Chen - One of the best experts on this subject based on the ideXlab platform.
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convective mass transfer and pressure loss characteristics of staggered short pin fin arrays
International Journal of Heat and Mass Transfer, 1994Co-Authors: R J Goldstein, M Y Jabbari, S B ChenAbstract:Abstract The effect of fin shape on the mass transfer and pressure loss of a ten-row staggered short pin-fin array in fully developed approaching flow is investigated experimentally using three different fin shapes. The Reynolds number, based on approach-velocity and fin diameter, ranges from 3000 to 18000. The fin shape affects the row-by-row variation of Sherwood number. The results indicate that the stepped-diameter circular fin arrays have not only a larger mass transfer coefficient, but also a smaller pressure loss compared to a uniform-diameter circular fin array. In stepped-diameter circular fin arrays, the effect of step-length-to-total-length ratio on Sherwood number is small, but the total mass transfer rate and pressure loss change significantly with this ratio, owing to differences in mass transfer Area and free flow Area, respectively.
