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Experimental Study of Condensation on Micro Grooved Plates

Overview. IntroductionExperimental SystemApparatusTest PlatesTest ConditionsResultsOverall Condensation Heat Transfer CoefficientCondensate RemovalConclusions. Micro Grooves. Scientific InterestOptimum geometry to take advantage of the surface tensionEffect of vapor shear during condensati

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Experimental Study of Condensation on Micro Grooved Plates

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    1. Experimental Study of Condensation on Micro Grooved Plates R. Barron-jimenez, H. Y. Hu, G. P. Peterson Department of Mechanical Engineering Texas A&M University

    2. Overview Introduction Experimental System Apparatus Test Plates Test Conditions Results Overall Condensation Heat Transfer Coefficient Condensate Removal Conclusions

    3. Micro Grooves Scientific Interest Optimum geometry to take advantage of the surface tension Effect of vapor shear during condensation Role of gravitational body force during condensation Applications Condensate removal Thin film Retain liquid Enhance capillary pumping in micro heat pipes

    4. Experimental Apparatus

    5. Experimental Apparatus

    6. Experimental Apparatus

    7. Experimental Apparatus

    8. Test Plates

    9. Test Plates

    10. Test Plates

    11. Test Conditions Vapor velocity : 4.14±0.64 m/s Re (transition regime) : 3.474*103 System pressure : 101.35 kPa Plate orientation : Horizontal Cooling Temperature : 20, 35, 50, or 65şC

    12. Test Conditions Constant Plate Temperature Assumption

    13. Results

    14. Results

    15. Results

    16. Conclusions Data is not conclusive. Further work is recommended Large micro grooves with 60ş apex angles tend to work better (best performance: Plate 5) Tests conditions improve the micro grooves performance Micro grooves help to maintain a stable condensation pattern Eliminate “wall channel” effect and reduce heat losses

    17. Questions?

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