The Experts below are selected from a list of 6636 Experts worldwide ranked by ideXlab platform

Hui Han - One of the best experts on this subject based on the ideXlab platform.

  • Experimental Study on Shell-Side Pressure Drop and Offshore Adaptability of LNG-FPSO Spiral Wound Heat Exchanger
    Experimental Thermal and Fluid Science, 2019
    Co-Authors: Chongzheng Sun, Jianlu Zhu, Hui Han, Qin Yaqi, Shaowei Wang, Liang Liu
    Abstract:

    Abstract FLNG (Floating liquefied natural gas) has been proposed for the production and transportation of natural gas in the deep water area. The effects of offshore condition on the performance of the SWHE (spiral wound heat exchanger) applied in FLNG attract much attention. Three experimental devices of SWHEs are constructed to quantitatively evaluate how the shell-Side Pressure Drops of FLNG SWHEs are affected by different sloshing angles (3∼9 °), periods (6∼30 s) and amplitudes (120∼255 mm). The experimental offshore conditions include inclining, yawing, pitching, heaving, surging and compound sloshing conditions. The results show that shell-Side Pressure fluctuation influenced by pitching motion is much more dramatic than that influenced by other sloshing conditions. The shell-Side Pressure fluctuation of falling film flow (within 80%) influenced by pitching motion is greater than that of vapor flow (within 21%). The increase of pitching periods and angles can increase the Pressure fluctuation. A continuous dimensionless correlation for shell-Side friction coefficient was obtained within a deviation of ±15% for the experimental data.

  • Experimental tube-Side Pressure Drop characteristics of FLNG spiral wound heat exchanger under sloshing conditions
    Experimental Thermal and Fluid Science, 2017
    Co-Authors: Chongzheng Sun, Jianlu Zhu, Hui Han
    Abstract:

    Abstract In order to study the operation reliability of spiral wound heat exchangers (SWHEs) applied in floating liquefied natural gas (FLNG) offshore platforms, an experimental device of dual mixed refrigeration (DMR) and a six-DOF (degree of freedom) sloshing platform are constructed. The effects of yawing, pitching, heaving and surging motions on the Pressure Drop characteristics of SWHE are analyzed experimentally at different sloshing angles, periods and amplitudes. The results show that Pressure Drop characteristics of gas-phase mixed refrigerant are influenced much more significantly under sloshing conditions, compared with feed gas and liquid-phase mixed refrigerant. In addition, heaving and pitching motions have a larger influence on tube-Side Pressure Drop characteristics than surging and yawing, under the same conditions.

Chongzheng Sun - One of the best experts on this subject based on the ideXlab platform.

  • Experimental Study on Shell-Side Pressure Drop and Offshore Adaptability of LNG-FPSO Spiral Wound Heat Exchanger
    Experimental Thermal and Fluid Science, 2019
    Co-Authors: Chongzheng Sun, Jianlu Zhu, Hui Han, Qin Yaqi, Shaowei Wang, Liang Liu
    Abstract:

    Abstract FLNG (Floating liquefied natural gas) has been proposed for the production and transportation of natural gas in the deep water area. The effects of offshore condition on the performance of the SWHE (spiral wound heat exchanger) applied in FLNG attract much attention. Three experimental devices of SWHEs are constructed to quantitatively evaluate how the shell-Side Pressure Drops of FLNG SWHEs are affected by different sloshing angles (3∼9 °), periods (6∼30 s) and amplitudes (120∼255 mm). The experimental offshore conditions include inclining, yawing, pitching, heaving, surging and compound sloshing conditions. The results show that shell-Side Pressure fluctuation influenced by pitching motion is much more dramatic than that influenced by other sloshing conditions. The shell-Side Pressure fluctuation of falling film flow (within 80%) influenced by pitching motion is greater than that of vapor flow (within 21%). The increase of pitching periods and angles can increase the Pressure fluctuation. A continuous dimensionless correlation for shell-Side friction coefficient was obtained within a deviation of ±15% for the experimental data.

  • Experimental tube-Side Pressure Drop characteristics of FLNG spiral wound heat exchanger under sloshing conditions
    Experimental Thermal and Fluid Science, 2017
    Co-Authors: Chongzheng Sun, Jianlu Zhu, Hui Han
    Abstract:

    Abstract In order to study the operation reliability of spiral wound heat exchangers (SWHEs) applied in floating liquefied natural gas (FLNG) offshore platforms, an experimental device of dual mixed refrigeration (DMR) and a six-DOF (degree of freedom) sloshing platform are constructed. The effects of yawing, pitching, heaving and surging motions on the Pressure Drop characteristics of SWHE are analyzed experimentally at different sloshing angles, periods and amplitudes. The results show that Pressure Drop characteristics of gas-phase mixed refrigerant are influenced much more significantly under sloshing conditions, compared with feed gas and liquid-phase mixed refrigerant. In addition, heaving and pitching motions have a larger influence on tube-Side Pressure Drop characteristics than surging and yawing, under the same conditions.

Liang Liu - One of the best experts on this subject based on the ideXlab platform.

  • Experimental Study on Shell-Side Pressure Drop and Offshore Adaptability of LNG-FPSO Spiral Wound Heat Exchanger
    Experimental Thermal and Fluid Science, 2019
    Co-Authors: Chongzheng Sun, Jianlu Zhu, Hui Han, Qin Yaqi, Shaowei Wang, Liang Liu
    Abstract:

    Abstract FLNG (Floating liquefied natural gas) has been proposed for the production and transportation of natural gas in the deep water area. The effects of offshore condition on the performance of the SWHE (spiral wound heat exchanger) applied in FLNG attract much attention. Three experimental devices of SWHEs are constructed to quantitatively evaluate how the shell-Side Pressure Drops of FLNG SWHEs are affected by different sloshing angles (3∼9 °), periods (6∼30 s) and amplitudes (120∼255 mm). The experimental offshore conditions include inclining, yawing, pitching, heaving, surging and compound sloshing conditions. The results show that shell-Side Pressure fluctuation influenced by pitching motion is much more dramatic than that influenced by other sloshing conditions. The shell-Side Pressure fluctuation of falling film flow (within 80%) influenced by pitching motion is greater than that of vapor flow (within 21%). The increase of pitching periods and angles can increase the Pressure fluctuation. A continuous dimensionless correlation for shell-Side friction coefficient was obtained within a deviation of ±15% for the experimental data.

Jianlu Zhu - One of the best experts on this subject based on the ideXlab platform.

  • Experimental Study on Shell-Side Pressure Drop and Offshore Adaptability of LNG-FPSO Spiral Wound Heat Exchanger
    Experimental Thermal and Fluid Science, 2019
    Co-Authors: Chongzheng Sun, Jianlu Zhu, Hui Han, Qin Yaqi, Shaowei Wang, Liang Liu
    Abstract:

    Abstract FLNG (Floating liquefied natural gas) has been proposed for the production and transportation of natural gas in the deep water area. The effects of offshore condition on the performance of the SWHE (spiral wound heat exchanger) applied in FLNG attract much attention. Three experimental devices of SWHEs are constructed to quantitatively evaluate how the shell-Side Pressure Drops of FLNG SWHEs are affected by different sloshing angles (3∼9 °), periods (6∼30 s) and amplitudes (120∼255 mm). The experimental offshore conditions include inclining, yawing, pitching, heaving, surging and compound sloshing conditions. The results show that shell-Side Pressure fluctuation influenced by pitching motion is much more dramatic than that influenced by other sloshing conditions. The shell-Side Pressure fluctuation of falling film flow (within 80%) influenced by pitching motion is greater than that of vapor flow (within 21%). The increase of pitching periods and angles can increase the Pressure fluctuation. A continuous dimensionless correlation for shell-Side friction coefficient was obtained within a deviation of ±15% for the experimental data.

  • Experimental tube-Side Pressure Drop characteristics of FLNG spiral wound heat exchanger under sloshing conditions
    Experimental Thermal and Fluid Science, 2017
    Co-Authors: Chongzheng Sun, Jianlu Zhu, Hui Han
    Abstract:

    Abstract In order to study the operation reliability of spiral wound heat exchangers (SWHEs) applied in floating liquefied natural gas (FLNG) offshore platforms, an experimental device of dual mixed refrigeration (DMR) and a six-DOF (degree of freedom) sloshing platform are constructed. The effects of yawing, pitching, heaving and surging motions on the Pressure Drop characteristics of SWHE are analyzed experimentally at different sloshing angles, periods and amplitudes. The results show that Pressure Drop characteristics of gas-phase mixed refrigerant are influenced much more significantly under sloshing conditions, compared with feed gas and liquid-phase mixed refrigerant. In addition, heaving and pitching motions have a larger influence on tube-Side Pressure Drop characteristics than surging and yawing, under the same conditions.

Hie Chan Kang - One of the best experts on this subject based on the ideXlab platform.

  • Air-Side Heat Transfer Performance of Louver Fin and Multitube Heat Exchanger for Direct Methanol Fuel Cell Cooling Application
    Journal of Fuel Cell Science and Technology, 2014
    Co-Authors: Hie Chan Kang, Hyejung Cho, Jin-ho Kim, Anthony M. Jacobi
    Abstract:

    The present work is performed to evaluate the heat transfer performance of a heat exchanger used in a direct methanol fuel cell. Because of material constraints and per-formance requirements, a louver fin heat exchanger is modified for use with conventional microchannel tubes and also with multiple small-diameter tubes (called multitubes). Pro-totype heat exchangers are tested, and the air-Side heat transfer, Pressure Drop, and fan power are measured in a wind tunnel and simulated using a commercial code. The air-Side Pressure Drop and heat transfer coefficient of the multitubes show similar trends to those of the flat-tube heat exchanger if the contact resistance is negligible. The tube spac-ing of the prototype multitube heat exchangers has a small effect on the Pressure Drop and heat transfer, but it has a profound effect on the air-Side heat transfer performance because of the contact resistance between the tubes and louver fins. The air-Side Pressure Drop agrees well with an empirical correlation for flat tubes.

  • Air-Side Heat Transfer Performance of Louver Fin and Multi-Tube Heat Exchanger for Fuel-Cell Cooling Application
    2012
    Co-Authors: Hie Chan Kang, Anthony M. Jacobi, Minkyoo Lee, Jin-ho Kim
    Abstract:

    The present work is performed to evaluate the heat transfer performance of a heat exchanger used in a fuel cell. Because of material constraints and performance requirements, a louver fin heat exchanger is modified for use with conventional micro-channel tubes and with multiple small-diameter tubes (a so-called multi-tube). Prototype heat exchangers are tested, and the air-Side heat transfer, Pressure Drop, and fan power are measured in a wind tunnel and simulated using a commercial code. The air-Side Pressure Drop and heat transfer coefficient of the multi-tubes show similar trends to those of the flat-tube heat exchanger if the contact resistance is negligible. The tube spacing of the prototype multi-tube heat exchangers has a small effect on the Pressure Drop and heat transfer, but it has a profound effect on air-Side heat transfer performance because of the contact resistance between the tubes and louver fins. The air-Side Pressure Drop agrees well with an empirical correlation for flat tubes.

  • Effect of strip location on the air-Side Pressure Drop and heat transfer in strip fin-and-tube heat exchanger
    International Journal of Refrigeration, 1999
    Co-Authors: Hie Chan Kang, Moo Hwan Kim
    Abstract:

    Abstract This work discusses about the Pressure Drop and heat transfer characteristics of a plain fin, a strip fin and combinations thereof in the fin-and-tube heat exchanger. Experimental apparatus and test algorithm using scale-up model fin geometry are discussed. The present work uses the electric heaters inSide of the tube as the heating source to simulate the hot water loop in the wind tunnel test. The test results of the plain and strip fins are compared with the existing correlation and experimental data. It was found that a hybrid fin, plain fin at front row and strip fin at rear row, was more effective to enhance the heat transfer than that of the whole strip fin at the same fan power.