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Www.orcnext.be ORCNext – WP4 Development of supercritical technologies Huisseune Henk 1.

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Presentation on theme: "Www.orcnext.be ORCNext – WP4 Development of supercritical technologies Huisseune Henk 1."— Presentation transcript:

1 www.orcnext.be ORCNext – WP4 Development of supercritical technologies Huisseune Henk 1

2 www.orcnext.be Test facility 2 Experimental setup Feeding pump Pre-heater Test-section Cooler Pressure gauges Flow meter Temperature sensors

3 www.orcnext.be Test facility 3 Test section Working fluid: R125 or R134a Uniform cross section: circular tube Electrical uniform heat flux (DC or AC power supply) Thermocouples

4 www.orcnext.be Measurements 4 Variation of the heat transfer coefficient with bulk temperature for forced convection in a heated pipe for carbon dioxide of 78.5bar flowing upwards in a 1.0 diameter vertical pipe.

5 www.orcnext.be Measurements 5 Wall and bulk temperature as a function of the distance along a vertical heated 1.6 cm diameter pipe for water at 245 bar (1.11 pcrit). Heat transfer deterioration – Downward flow  no unusual behaviour – Upward flow  Deterioration Flow direction 138227Vertical upward 238237Vertical upward 340045Vertical upward 437552Vertical upward 540027Vertical downward 640036Vertical downward 739343Vertical downward 838150Vertical downward Upward flowDownward flow

6 www.orcnext.be General characteristics Heat transfer deterioration 6 Comparison upward, downward and horizontal flow (1) Horizontal pipe – upper surface (2) Horizontal pipe – lower surface (3) Vertical pipe – upward flow (4) Bulk fluid temperature

7 www.orcnext.be Determine influence of parameters 7

8 www.orcnext.be Poc supercritical HX Using the insights obtained from the experiments, a Poc HX wil be designed and tested. Results will be used as model vallidation. Type: Shell and tube or (spiral) tube-in-tube heat exchanger. Built in test setup at Kortrijk. 8

9 www.orcnext.be Goals and planning 01/01/2013 – 31/06/2013: Design test setup with EES 01/07/2013 – 31/12/2013: Building test setup From 01/01/2014: Perform measurements on test loop 31/06/2014 – 31/12/2014: Design a Poc supercritical HX for model validation 9

10 www.orcnext.be ORCNext – WP4 Development of supercritical technologies Huisseune Henk 10

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