Low Temperature heat applications in industry

Transcription

1 World Sustainable Energy Days Conference Solar Process Heat Low Temperature heat applications in industry Wels, Dipl.-Ing. Dr.techn. Friedrich Lettner Allgemein beeideter und gerichtlich zertifizierter Sachverständiger KPC-Qualitätsbeauftragter für Heizwerke Ziviltechniker für Energie- und Umwelttechnik office@zt-lettner.at Telefon: Fax: A Graz (Stmk) A 4323 Münzbach (OÖ) Körblergasse 62C Schulstrasse 12 73

2 Contents 1. Classification/Definition of low temperature applications, Potentials in energy demand 2. Examples for low temperature applications (only focused in this presentation is standard plate application) 1. Heat and Warmwater supply in a hospital 2. Warmwater supply in a Tinned food business 3. Warmwater supply in a slaugtherhouse 4. Warmwater supply in a Meat processing company 5. Heat supply for industrial drying or resources upgrading ( ) 3. Conclusions 74

3 Classification/Definition of Low temperature process heat und share of industrial demand at different temperature-levels 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% high, over 400 C medium, C low, below 100 C share endenergy [%] Source: Ecoheatcool WP1 The European Heat Market, Final Report, Euroheat & Power,

4 Heat and Warmwater supply in a hospital (1) 60m³ (fix) C Fernwärmenetz C 20m³ (fix) m³ (f(k Fläche )) 76

5 Heat and Warmwater supply in a hospital (2) Characteristics of the plant Biomass-district heating grid Minimum medium maximum power peak load [kw] summer load [kw] heat (energy) demand [MWh/a] inlet flow temperature [ C] 95 / 95 / 75 outlet flow temperature [ C] 75 / 55 / 55 Solar plant and heat storage collector size [m²] Type [-] different declination, azimut [, -] 40, south storage volume boiler [m³] 80 storage volume solar [m³] storage volume total [m³] Thermal insulation [m] 0,25 Climate data Place [-] coordinates [-] total radiation, hor. [kwh/m²/a] 1193 diffuse radiation, hor. [kwh/m²/a] 584 average ambient temperature [ C] 5,3 max./min ambient temperature [ C] 26,5 / -19,7 77

6 Heat demand (medium scenario) of solar scenario 4c2 (95/75/25/1500) Ganglinie mittel Qsol kw 4c2 Leistung [kw] Stunden [h] 78

7 Simulation results 75/55 C 95/55 C 95/75 C Source: R. Heimrath, Institute of thermal engineering, Graz University of Technology 79

8 Sensitivity of fuel costs on average heatprice Sensitivity biomass [%] 70% 80% 90% 100% 110% 120% 130% Costs of biomass [ /Srm] 14,00 16,00 18,00 20,00 22,00 24,00 26,00 Average Heatprice based on biomassstand alone [ /MWh] 53,78 57,27 60,76 64,25 67,74 71,23 74,72 Average Heatprice based on biomass in combination with solar application, 95/75 Average Heatprice based on biomass in combination with solar application, 95/55 [ /MWh] [ /MWh] [m²] ,85 62,25 65,64 69,03 72,42 75,81 79, ,75 60,95 64,14 67,34 70,53 73,73 76, ,72 59,74 62,75 65,77 68,79 71,81 74, ,71 58,57 61,43 64,29 67,14 70,00 72, ,73 57,44 60,15 62,86 65,58 68,29 71, ,64 62,00 65,36 68,72 72,08 75,44 78, ,11 60,22 63,32 66,42 69,52 72,63 75, ,64 58,51 61,37 64,23 67,10 69,96 72, ,25 56,90 59,55 62,20 64,85 67,50 70, ,96 55,42 57,88 60,33 62,79 65,25 67,71 80

9 Emissionsveränderung durch Biomasse-Nahwärme und Solar (mit Berücksichtigung der Bereitstellung) 100% Emissions reduction with biomass and solar energy supply (calculated on total energy supplyenergiebereitstellung) changes in emissions [%] 80% 60% 40% 20% 0% -20% -40% -60% -80% -100% -120% Changes in Emissions: difference pre - post CO2 SO2 NOx -11,5% CxHy CO -27,1% -80,7% -75,5% -93,9% 81

10 Warmwater supply in a slaughterhouse - boundary conditions Boundary Conditions Business Slaughterhouse Capacity/Type [-, #/d] Cows 65 Capacity/Type [-, #/d] Pigs 500 Water demand 12% [ltr./d] Temperature water inlet [ C] 11 Temperature water supply 10% [ C] 98 warm water demand [%] Basic System 8% Boiler Natural Gas coiler atmospheric 6% boilers power load [kw] 990 warm water storage 4% [ltr.] 3000 Additional System 2% additional boiler (comfort and solar) [ltr.] % power load [%]

11 50 m² Warmwater supply in a slaughterhouse - results of simulation 200 m² 83

12 Warmwater supply in a slaughterhouse - economics and CO 2 -reduction collector size [m²] solar cover ratio [%] 2% 4% 6% 8% 12% 16% Efficiency [%] 68% 66% 64% 62% 59% 53% specific efficiency [kwh/m²/a] Payback time (static) [a] 12,6 10,8 10,3 10,2 10,4 11,3 CO2-reduction [t/a] 9,4 18,3 26,8 34,8 49,4 59,3 84

13 Conclusions There is a significant potential for standard thermal solar application in food, resources upgrade, drying and production business The 3 main challenges are: 1. Temperature and storage issues in combination with different production capacity-planning base figures 2. the mostly already existing effective supply chain (heat recovery) 3. Different approach in relation to conventional systems in economics as well as in the strategic decision between reduced additional supply vs. supply security/storage capacity For future development of energy costs, the additional solar thermal supply makes more and more sense in order to save resources... 85

14 Dipl.-Ing. Dr.techn. Friedrich Lettner Allgemein beeideter und gerichtlich zertifizierter Sachverständiger KPC-Qualitätsbeauftragter für Heizwerke Ziviltechniker für Energie- und Umwelttechnik Telefon: Fax: A Graz (Stmk) A 4323 Münzbach (OÖ) Körblergasse 62C Schulstrasse 12 86