Project summary. Rise Fjernvarme Rise, Aeroe Denmark

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1 Project summary Building Type of building District heating plant Number of users/dwellings, floors 115 buildings Year of construction n. a. Total effective area (heated) n. a. m 2 Hot tap water consumption (estimated) 1,200 m 3 /a, Whole energy consumption for heating 2,082,000 kwh/a purpose after CSTS implementation System engineering Year of construction of CSTS 2001 Type of collectors Flat plate collectors Thermal power 2,500 kw therm Aperture area of collectors *) 3,582 m 2 Buffer storage 4,000 m 3 Hot tap water storage 12.0 m 3 Total capacity of boilers (wood pellets) 800 kw Type of hot tap water heating Decentralised Type of heating system Centralised Description To establish a new district heating plant for the mayor part of the buildings in the villages Rise and Dunkaer. 115 buildings are connected including 100 single family houses, the school, church, inn, old peoples home and the primary school. The source of heat is 47 % solar heating and 53 % wood pellets. The intention was 50/50. The CSTC is 3,600 m 2, pellet boiler is 800 kw. The heat storage (seasonal storage) is 4,000 m 3. The max. heat load is 1,300 kw. The annual sale of heat is 2,400 MWh to the consumers. The heat lost in the network is 850 MWh, giving an annual demand from solar and pellets of 3,250 MWh. The CSTC is ground mounted. The storage is a vertical steel tank of diameter 20 m and a height of 13 m. Flemming Ulbjerg, Engineer / project manager: Technical well performing, due to the integration of all parts, including radiators etc. by the consumer. The economy is o.k. now compared to continued individual supply of heating by oil and electricity. Costs Total cost solar system 697,200 Euro Cost of CSTS / gross area of collectors 191 Euro/m 2 Subsidies 30 % Output Output of solar heat **) Reduction of final energy ***) CO 2 -emissions avoided 1,156 t CO 2 /a Solar performance guarantee *) Aperture area = light transmitting area of the front glass **) measured, between storage and piping to taps (solar system output) ***) related to the measured output mentioned before Owner Amba (Rise District Heating) Henning Schmidt Kirkeballevej Aeroeskoebing, Phone: hsmidt@dlgnet.dk

2 Technical description Hydraulic scheme not available (B6.1) Description of the CSTS Year of construction of CSTS 2001 Thermal power 2,500 kw therm. Gross area of collectors 3,650 m 2 Aperture area of collectors 3,582 m 2 Type of collectors Flat plate collectors Type of assembly Ground mounted Orientation of collectors South (0 ) Inclination angle to horizon 40 Freezing protection Glycol Overheating protection Cooling in panels at night time Operation mode Variable Use of CSTS for Hot tap water heating, space heating Buffer storage 4,000 m 3, 1 storage tank. The storage is an insulated over ground steel tank. Insulation: mm mineral wool. Hot tap water storage 12 m 3, litres (installed one in each building). Control of backup-system/csts Shared control: all parts at the plant are controlled by a SCADA system.

3 Technical description (2) Hot tap water system Type of hot water heating Decentralised Recirculation system For decentralised systems: Hot water tanks The installation on the consumer site Size of storage for hot tap water litres = m 3 Specification./. Space heating system Type of heating system Centralised Number of boilers 1 Total capacity (power output) of boilers 800 kw Capacity of each boiler and the. 1: 800 kw (2001) year of construction Energy source Wood pellets Type of boiler system Standard Type of operation Operator of the CSTS system CSTS monitoring Data accessible via internet Scientific monitoring & follow up Maintenance contract Visualisation of the solar heat output ESCO, neighbour district heating personnel : solar radiation, output of solar heat, heat produced Summary The CSTS is installed at the district heating plant, ground mounted. The flow in the solar circuit is operated by variable flow mode as well is the secondary circuit. The main part of the year the output temperature from the plant is at a level of 90 C. Input is in winter 30 C rising to C in the summer time. The produced heat is partly used to cover the actual demand and partly led to the heat storage. In the winter period the pellet boiler is in operation and does also have access to the heat storage (upper part only). In peak load situations in winters, the pellet boiler in parallel to the storage does cover the demand. The pellet boiler is out of operation from may until october. Automatic monitoring via the SCADA system. Screen dumps at the SCADA system. Yield of CSTS plant Output of solar heat Measuring point Reduction of final energy Solar performance guarantee Measured Between collector and storage Building owners Heat consumption Whole energy consumption for heating 2,082,000 kwh/a purposes after CSTS implementation Measured Energy used for Hot tap water heating, space heating Whole energy consumption for heating 3,500,000 kwh/a purposes before CSTS implementation Total tap water consumption 3,600 m 3 /a Hot tap water consumption 1,200 m 3 /a, Hot tap water temperature 50 C Cold water temperature 10 C

4 Financing & Investment Introduction The financing is done by grants from Danish Energy Agency and a loan in a special bank ( Municipality credit ). The loan is guaranteed by the municipality, giving a reduced interest. Financing of CSTS Form of financing Purchase Distribution in percentage 100 % Costs of solar materials Total cost of solar system 697,200 Euro Detailed costs for Collectors Elevation/mounting structure Storage/heat exchanger 346,000 Euro Backup heater 108,000 Euro Control 47,000 Euro Installation Planning/Engineering Others The subsidies were from the Danish energy Agency, 3 different parts (30 %). The rest is financed by municipality guaranteed loans (70 %). Operation costs of heating system Power cost for pumping Maintenance cost Monitoring cost Other operaton cost Total operation cost Or: Increase of operation cost after CSTS implementation C4.1 Euro/a C4.2 Euro/a C4.3 Euro/a C4.4 Euro/a C4.5 Euro/a n. a. figures are available. The district heating plant replaces 115 individual boilers.

5 Development & Experiences Qualitative aspects is part of a national programme to develop seasonal heat storages (Danish Energy Agency). A national strategy for development of solar heating and seasonal storages. Solar fractions of 50 % is one of the goals. Experiences management Experience problems or failures? Find solutions to these problems or failures? Financial effects/project performance Project economically efficient? Fiscal or other financial effects? Effects on rental fees? Experiences technical staff Experience problems or failures? Find solutions to these problems or failures? : Teflon foil in some of the panels was damaged after three years of operation. The influence at the performance is not yet known. Summary of experiences / tices to the project performance The technical performances and the integration of all parts, right from the radiator by the consumer to the control of the CSTS and the boiler and heat storage. The extra investment in balancing the existing installations, new hot water tanks, reduced network dimensions etc. is performing as expected and is far better than other new district heating plants. The return temperatures in Rise are at a level of degrees year around, compared to others at a level of degrees or even higher. As the oil prices now are at a stabile high level the economic aspects of the project are satisfied.