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CHP Plant based on a Hybrid Biomass and Solar System of the Next Generation EU project No. ENER/FP7/249800/"SUNSTORE 4" Dipl.-Ing. Alfred Hammerschmid

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(1)CHP Plant based on a Hybrid Biomass and Solar System of the Next Generation EU project No. ENER/FP7/249800/"SUNSTORE 4" Dipl.-Ing. Alfred Hammerschmid. BIOS BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz, Austria TEL.: +43 (316) 481300; FAX: +43 (316) 4813004 E-MAIL: hammerschmid@bios-bioenergy.at HOMEPAGE: http://www.bios-bioenergy.at.

(2) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. Contents. EU project: aims History of district heating in Marstal Overall plant design Plant units Operation mode of the system. 2.

(3) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. Aims.  SUNSTORE 4 is an awarded large-scale demonstration project within the EU's 7th frame program (theme 5 – Energy)  Demonstration of a 100 % renewable energy system for district heating  Based on an already existing system the future SUNSTORE 4 district heating installation should achieve a significant solar fraction (in the range of 50%) in combination with long term heat storage with heat production costs between 3-6 -cent per kWh  Additionally a biomass CHP plant based on an ORC and a CO2 compressor driven heat pump will be integrated in order to cover the remaining heat demand  The biomass fuel will be willow from short rotation directly planted around the project site (Island of Aero - DK) in the near future 3.

(4) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. Plant location (I). MARSTAL solar-biomass-CHP-plant. 4.

(5) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. No. Partner name. Consortium within the EU project Country. Main task. 1. Marstal Fjernvarme a.m.b.a.. Denmark. project coordinator and plant erector/operator; dissemination northern/western Europe. 2. SUNMARK A/S. Denmark. supplier of solar collectors. 3. Euro Therm A/S. Denmark. supplier of biomass boiler system. 4. Advansor. Denmark. supplier of heat pump. 5. Steinbeis Innovation GmbH. Germany. long term monitoring. 6. Energy Management AB. Sweden. european level concept study. 7. BIOS BIOENERGIESYSTEME GmbH. Austria. engineering of ORC and thermal oil system; optimisation of biomass boiler (CFD). 8. Euroheat & Power. Belgium. dissemination European level. 9. CityPlan spol. s r.o.. Czech Rep.. dissemination eastern Europe. 10. Ambiente Italia. 11. PlanEnergi. Italy Denmark. dissemination southern Europe technical consultant. 5.

(6) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. Overview about the existing installation. Bio-oil boilers. Steel heat storage tank. Pit heat storage. Solar plant 6.

(7) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. Key facts of Marstal Fjernvarme. Key facts of Marstal Fjernvarme:  Established in 1962  Company is a “Cooperative” –> heat consumer owned  1,500 heat consumers  35 km network of pipes for district heating supply  Thermal solar coverage ~ 25-30 % of the total heat production  2,100 t/a bio-oil consumption (by-products from food industry). 7.

(8) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. Existing installation at Marstal Fjernvarme. Existing energy system of Marstal Fjernvarme:  18,300 m solar system  18.3 MWth (total) bio-oil boilers  10,340 m pilot pit heat storage Bio-oil boilers.  3,500 m sand storage  2,100 m steel heat storage  Annual heat production, in total 28,000 MWh (2009) Wet scrubber after bio-oil boilers 8.

(9) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. Marstal heat production in 2008. 5,000. heat production [MWh]. 4,500. bio-oil solar. 4,000 3,500 3,000 2,500 2,000 1,500 1,000 500 0 Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec. months 9.

(10) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. Plant overview of SUNSTORE 4. 3 4. 5. 2. 1. Explanations: 1existing solar plant; 2existing pit heat storage; 3area for new solar plant; 4area for new pit heat storage; 5area for new biomass CHP plant and connection of existing and new plant. 10.

(11) Principle hydronic system of SUNSTORE 4. BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. 80°C thermal oil 300°C. Biomass boiler. Existing plant. ORC DH. 250°C. Flue gas condensation Cyclone biomass fuel 35°C. Heat Pump. Solar plant. 80°C. Pit heat storage. 10°C. 11.

(12) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. New system units of SUNSTORE 4. The project involves the following new units:.  15,000 m of solar collectors 4 MWth biomass thermal-oil boiler fired with willow from SRF  1 MWth flue gas condensation unit  750 kWel ORC  1.5 MWth CO2 compressor driven heat pump  75,000 m pit heat storage. 12.

(13) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. Heat production of different units in future operation. Heat production unit Existing solar plant New solar plant (15,000 m) Solar production total Existing heat pump New heat pump (1.5 MW th) Heat pumps total ORC Flue gas condensation Biomass total Heat losses existing storages Heat losses new storage Heat losses storages total Peak load oil boiler Total energy supply to district heating. Heat production [MWh/a] 7,100 6,400 13,500 200 1,000 1,200 14,500 4,800 19,300 - 600 - 2,200 - 2,800 700 31,900 13.

(14) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. Total water volume: 75,000 m. Scheme of new pit heat storage. (distances in mm). 14.

(15) Biomass combustion plant including heat recovery. BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz.  

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(29) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. After harvesting. Biomass fuel – Danish willow. After chipping 16.

(30) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz Moisture Content C H N S Cl F Si Ca Mg Al P Fe Mn K Na Zn Pb Cd Cu V Cr Co Ni As Mo Sb Ba Hg Tl Ash content (550°C). wt% (w.b.) wt% d.b. wt% d.b. wt% d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. mg/kg d.b. wt% d.b.. Biomass fuel analysis – Danish willow 51.71 48.39 6.04 0.29 252 38 5 200 4,190 352 20 733 10 21 2,400 56 70.20 0.06 1.32 3.19 0.02 0.36 0.07 0.73 1.33 0.04 0.02 4.87 0.20 0.02 1.67. GCV measured GCV measured NCV calculated Sintering temperature Sphere temperature Hemisphere temperature Flow temperature. MJ/kg (d.b.) MJ/kg (d.b.) a.f MJ/kg (w.b.) °C °C °C °C. 18.80 19.03 7.37 1,080 1,140 1,190 1,210. - Analyses show that the chemical composition of willow is between typical wood chips and bark. - The detailed combustion behaviour has been pre-determined by lab-scale combustion tests. - CFD based design of the biomass combustion system and of the radiative section of the thermal oil boiler will support an optimised furnace and boiler design for this fuel at low emissions. 17.

(31) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. Thermal oil cycle and ORC. Organic Rankine Cycle (ORC). 700 kWel ORC plant in Lofer (Austria) 18.

(32) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. Multi-compressor high-pressure heat pump with CO2 as refrigerant (Source: Advansor). CO2 compressor driven heat pump. COP (coefficient of performance) is very sensible on the inlet temperature on the hot water circuit (corresponds with the gas cooler outlet temperature) but can reach very high hot water outlet temperatures (~ 80°C) without a reduction of COP. In Sunstore 4 the temperatures are: inlet 35°C, outlet 80°C 19.

(33) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. Future operation mode (I).  The main target is to substitute the costly bio-oil heat production during winter  The solar system will produce the main part of its heat production between spring and autumn  CO2 compressor driven heat pump. • •. Utilises low temperature energy from the bottom of the heat storage. •. Efficiency of the solar system will be increased due to lower inlet temperature from the bottom of the pit heat storage. •. Reduction of heat losses in the pit heat storage due to lower average temperature. •. The operation of the heat pump takes place mainly at the end of the winter season in order to optimise the solar efficiency and the solar yields. Heat capacity of the pit heat storage will be increased due to larger temperature difference. 20.

(34) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. Future operation mode (II).  The biomass CHP system will manage the differences between solar production and heat demand mainly from autumn to spring  The flue gas condensation unit and the ORC are connected in serial in order to reach a high efficiency for both systems. •. the supply temperature of the flue gas condensation unit can be kept very low which allows a high efficiency for this system. •. the electric efficiency of the ORC is mainly defined by the relatively low district heating supply temperature of 80°C.  The estimated electricity production from the ORC will be about 3,000 MWh/a  The estimated electricity own demand for the plant including the heat pump is calculated to be about 1,500 MWh/a. Thus the whole plant will be a net producer of green electricity 21.

(35) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. Further facts of the EU project. Project budget: 15.1 Mio.  EU funding: 6.1 Mio.  Project duration: 4 years (48 month) – started July 2010 The project will be disseminated to 10 EU countries with the aim to shortly establish 20 similar facilities in Europe. The countries are Austria, Czech Republic, Denmark, France, Germany, Italy, Poland, Spain, Sweden and England. The goal for 2020 is to achieve a thermal capacity of 0.9 - 1.8 GWth leading to an annual heat production of 2-4 PJ/a based on this new hybrid biomass / solar solution within the EU. 22.

(36) BIOENERGIESYSTEME GmbH Inffeldgasse 21b, A-8010 Graz. Please visit our stand outside the auditorium!. Thank you for your attention Dipl.-Ing. Alfred Hammerschmid Inffeldgasse 21b, A-8010 Graz, Austria TEL.: +43 (316) 481300; FAX: +43 (316) 4813004 E-MAIL: hammerschmid@bios-bioenergy.at HOMEPAGE: http://www.bios-bioenergy.at 23.

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