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ORCNext – WP4 Development of supercritical technologies

ORCNext – WP4 Development of supercritical technologies. Tom Catternan Henk Huisseune. WP4 and WP5. Model, build and test SC heat exchanger. Heat transfer and pressure drop correlations. Selection of refrigerant :. HX type: horizontal shell & tube or ( spiral ) tube-in-tube.

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ORCNext – WP4 Development of supercritical technologies

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  1. ORCNext – WP4Development of supercriticaltechnologies Tom Catternan HenkHuisseune

  2. WP4 and WP5 Model, build and test SC heat exchanger

  3. Heat transfer and pressure drop correlations • Selection of refrigerant: • HX type: horizontal shell & tube or (spiral) tube-in-tube • Design method: e.g. (subcritical) method of Taborek • No appropriate heat transfer and pressure drop correlationsavailable! • Correlationswillbedeterminedthroughexperiments Easieron single tube thanon full HX

  4. Experimentalwork plan WP4 • Test setupforsupercritical heat transfer in horizontal tube (@UGent - ATHT) • Determination of heat transfer and pressure drop correlations • Design of a PoC SC heat exchangerbasedoncorrelations • Test of PoC SC heat exchanger (@HoWest) Task 4.2 Task 4.3 Implementation of PoC SC HX in ORC validation of simulations

  5. Requirements • Easy implementation of SC heat exchanger in HoWestsetup • Refrigerant R125 or R134a • High pressure (resp. 40 bar and 45 bar) • Goodinsulation

  6. Measurements • Heat supply (hot oil) • Refrigerantflowrate • Pressure in/out • Temperature in/out • Temperaturemeasurements in flowdirection (?) • Steady-state, if time alsotransient (cfr. validationtask 4.4)

  7. Original time planning

  8. Expected time planning

  9. ORCNext – WP4Development of supercriticaltechnologies Tom Catternan HenkHuisseune

  10. WP4 and WP5 Model, build and test SC heat exchanger

  11. Tasks WP4 • Task 4.1: literaturestudy, selectionrefrigerants, studythermalproperty databases • Task 4.2: study of heat transfer (correlations) • Task 4.3: build SC shell&tube HX, test, determinecorrelation (@HoWest) • Task 4.4: EES simulation of SC ORC + transientbehaviour

  12. Tasks WP5

  13. Test facility Experimental setup • Feeding pump • Pre-heater • Test-section • Cooler • Pressure gauges • Flow meter • Temperature sensors

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

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