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NEW APPROACH FOR UNDERFLOOR HEATING WITH THE USAGE OF PHASE CHANGING MATERIALS

‘Sustainergy’ 2 nd International Youth Competition 2-6 March 2013. NEW APPROACH FOR UNDERFLOOR HEATING WITH THE USAGE OF PHASE CHANGING MATERIALS. H erman Yu val (Israel) Sorrentino Elisa (Italy) Mordechai Lihen (Israel ). Why improve energy consumption in buildings ?.

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NEW APPROACH FOR UNDERFLOOR HEATING WITH THE USAGE OF PHASE CHANGING MATERIALS

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  1. ‘Sustainergy’ 2nd International Youth Competition 2-6 March 2013 NEW APPROACH FOR UNDERFLOOR HEATING WITH THE USAGE OF PHASE CHANGING MATERIALS Herman Yuval (Israel) Sorrentino Elisa (Italy) MordechaiLihen (Israel)

  2. Why improve energy consumption in buildings ? • Consumes about 40% of the world’s energy. • Are responsible for 50% of the CO2 emissions. ‘Sustainergy’ 2nd International Youth Competition 2-6 March 2013

  3. Figure 1: energy use for heating Infra - red under-floor heating ‘Sustainergy’ 2nd International Youth Competition 2-6 March 2013

  4. Radiant under-floor heating advantages - Heating uniformity - Energy consumption reduces by 20 - 40% • - Heat as sunrays -in term of health Figure 2: Comparison between conventional and radiant heating ‘Sustainergy’ 2nd International Youth Competition 2-6 March 2013

  5. Comparison of Radiant Heat Technologies

  6. Disadvantages of the best existing under-floor heating systems • Energy consumption remains high • Heating system coverage of the floor is only up to 30% • Heating uniformity is relatively bad • Safety issues (may develop flames) ‘Sustainergy’ 2nd International Youth Competition 2-6 March 2013

  7. Our Goals To improve the thermal comfort To improve energy efficiency To reduce the electricity bill ‘Sustainergy’ 2nd International Youth Competition 2-6 March 2013

  8. Our idea - PCM floor PCM Floor Heating Mat Insulation material Floor Slab Figure3: Structure of the new floor

  9. What are PCMs? Figure 4: Pcms action Figure 5: Pcms melting point graph

  10. Why use Paraffin as our PCM? Melting point: 18-22°C Heating fusion: 172 kj/kg Cost : 2.5- 3.5 $/Kg Figure 6: paraffin PCM

  11. Heating Estimations Calculations for 1m2 of the floor BASF ‘s Micronal P.C.M panel L= 330 kJ/m2 P = 100W = 0.1KJ/s S= 1 m2 L= latent heat capacity P= thermal power S= area t= time Q= thermal energy ‘Sustainergy’ 2nd International Youth Competition 2-6 March 2013

  12. Using Electricity differential tariff for our on the system benefit 23:00 to 6:00 – 0.7×normal tariff figure 7: Israel tariff The PCM floor allows to switch the system on only during night time ‘Sustainergy’ 2nd International Youth Competition 2-6 March 2013

  13. Heating Estimations Calculations for 1m2 of the floor ‘Sustainergy’ 2nd International Youth Competition 2-6 March 2013

  14. Cooling of the floor Cooling time: 18h Cooling power: P= Q/t p= 33.3 W/m2 Figure 8: Heating loss from a house ‘Sustainergy’ 2nd International Youth Competition 2-6 March 2013

  15. Advantages of new heater • Energy saving – till 15% • Floor temperature close to the room temperature • High covered area - till 90% • Long life time • High safety Figure 9: New approach for heating systems

  16. CONCLUSION We improved the thermal comfort by providing a heating uniformity inside the room through the whole day. We reduced the electricity bill by switching the system on for only 7 hours in cheapest time. We improved energy efficiency by using a new heating system that prevents energy lost by covering more surface. ‘Sustainergy’ 2nd International Youth Competition 2-6 March 2013

  17. How we see the future of PCM usage? • Heating panels with high Latent Heat • Panel weight reducing • High surface area of heating elements • Walls with PCM material • Roof with PCM material • Wind or solar panels provide electricity ‘Sustainergy’ 2nd International Youth Competition 2-6 March 2013

  18. References • http://www.apartmenttherapy.com/on-the-horizon-building-with-p-124682 • http://en.wikipedia.org/wiki/Economy_7 • http://www.micronal.de/portal/basf/ien/dt.jsp?setCursor=1_290798 • http://www.lowex.info/projekte/Importe/projekt08/Techn%20data%20PCM%20SmartBoard%20E.pdf • http://www.lowex.info/projekte/Importe/projekt08/FL_SmartBoard_e.pdf • http://www.cmsl.co.nz/assets/sm/5720/61/1635AliceHarland.pdf ‘Sustainergy’ 2nd International Youth Competition 2-6 March 2013

  19. THANK YOU! For every one who helped us during these past few months, days and hours. To Naama, our advisors, Eli , the judges and everyone else we forgot…

  20. Ribbonsversus Wires Carpet Normal tariff in UK 17, 85 kw/h Night tariff 0,7*17,85=12.49 kw/h • Faster warming • Energy saving • Cheap insulation layer • Uniform heat ‘Sustainergy’ 2nd International Youth Competition 2-6 March 2013

  21. Calculations for the PCM floortaken from Micronal’s PCM panel Characteristics of the Micronal panel: • Thickness: 15 mm • Width: 1250 mm • Length: 2000 mm • Weight: 11,5 kg/m² • Operating temp. 23°C or 26°C • Latent heat capacity : 330 kJ/m² • Specific heat capacity: 1.20 kJ/kg K • Heat conductivity: 0.134 W/m K ‘Sustainergy’ 2nd International Youth Competition 2-6 March 2013

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