Novel polymeric materials for cost-efficient solar- thermal systems Gernot M. Wallner, R. Buchinger International Sustainable Energy Conference (ISEC) Graz, Austria 3-5 October 2018
New Materials – Tailor-made Absorber Materials P OLY P ROPYLENE (PP) P OLY A MIDE +G LASS F IBER (PA-GF) P OLY P HENYLENE S ULFIDE (PPS) Geretschläger et al., 2016 Povacz et al., 2012 Blockcoplymer + Carbon black + AO + HALS PPS + PO impact modifier various suppliers: e.g., Radici, Schulman, BASF Material T Glass , °C T Melt , °C Modulus, Strength Solar thermal system MPa @RT , MPa RT / 125°C Low-pressure PP -10 165 1200 / 200 25 systems, T max ~100°C 5000 / Pressurized systems PA-GF -40 to 60 260 100 2000 (< 6bar), T max ~100°C Low-pressure PPS 100 280 1400 / 200 50 systems, T max ~150°C 2
New Materials – Testing and qualification methods C UMULATIVE D AMAGE A PPROACH ( LOW MECHANICAL STRESS ) Simulation Extrapolation Ramschak, 2017 Wallner et al., 2016 Accumulation years TR IND PP old 24 20 PP new 34 29 Based on: Diss Povacz (2014); Diss Grabmann (2018) 3
Process Technologies – Continuous manufacturing E XTRUSION OF S HEETS AND P IPES Hollow sheets Pipes Sheets / liners Complexity, investment, quantity 4
Process Technologies – Discontinuous manufacturing I NJECTION OR C OMPRESSION M OULDING Injection moulding Compression moulding Complexity, investment, costs Complexity, investment, quantity 5
Solar-thermal systems – Hot Water & Space Heating A VENTA S OLAR – P UMPED D RAINBACK S YSTEM 8.4 m 3 heat store, divided in 6 separate units Rekstad, 2015 (AventaSolar collector system, Task39 Info sheet B16) LCOH sol = 0,035 – 0,099 €/kWh 6
Solar-thermal systems – Domestic Hot Water S UNLUMO – P UMPED “L OW P RESSURE ” S YSTEM from 20 parts brass …. to 10 parts plastic LCOH sol = 0,01 – 0,03 €/kWh, if > 100.000 systems/year 7
Solar-thermal systems – Domestic Hot Water G REEN O NE T EC – I NTEGRATED S TORAGE C OLLECTOR from > 100 parts / …. to 7 parts/ISC insulation: - 7-20% cover & TI: - 20-40% absorber: - 40% 8
Comparison of LCOH – Impact of new materials Aventa Sun- lumo 9
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