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Thermally Driven Natural Circulation Water Pump

Thermally Driven Natural Circulation Water Pump. University of Stellenbosch. Contents. Introduction Function Previous Work Objectives Approach Experimental set-up Conclusion. 1. Introduction. General drive for sustainable practices Green building design

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Thermally Driven Natural Circulation Water Pump

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  1. Thermally Driven Natural Circulation Water Pump University of Stellenbosch

  2. Contents • Introduction • Function • Previous Work • Objectives • Approach • Experimental set-up • Conclusion 1

  3. Introduction • General drive for sustainable practices • Green building design • Energy intensive air-conditioning is the normality • Passive downdraft evaporative cooling (PDEC) system 2

  4. Introduction (cont.) • TDNCWP: Thermally Driven Natural Circulation Water Pump • Application of sustainable design principles • Utilized with PDEC system • Replaces energy intensive pump • Aims to reduce life cycle costs 3

  5. Function • Uses solar energy and moist air to transport water • Circulation loop, pressure differential, evaporation, condensation • Element of building architecture 4

  6. Previous work • Difficulties modelling due to water extraction point • 1D model compared fairly well to experimental work • Experimental model requires attention • Sensitivity to loop dimensions / heat exchanger design • Detailed CFD analysis required 5

  7. Objectives • Develop a numerical simulation model with minimized assumptions • Construct a experimental setup to demonstrate and validate the model • Investigate the sensitivity to various parameters such as scale, ambient temperatures • Investigate the feasibility of using TDNCWP with PDEC system 6

  8. Approach • Newly developed simulation model • Application of first principle heat transfer / fluid dynamics equations • Extensive experimental analysis as validation • CFD analysis • Feasibility studies 7

  9. Experimental set-up • Small scale existing set-up • Will be adapted/expanded for current project 8

  10. Conclusion • Green building design principles imperative • Air-conditioning an energy intensive process • PDEC with TDNCWP provides a possible alternative • Research objectives will demonstrate feasibility 9

  11. Acknowledgements • National Research Foundation • iThemba Labs • Department of Mechanical Engineering, University of Stellenbosch • Mr Robert Dobson 10

  12. Thank you for your attention! • Kyle Hobbs • 15395936@sun.ac.za 11

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