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CASCADE USE OF GEOTHERMAL ENERGY FOR DISTRICT AIR CONDITIONING, MILK PASTEURIZATION, GREENHOUSE HEATING AND COOLING STORAGE

Objectif

Innovative demonstration of cascade use of the geothermal field of Xanthi. It is the first time that geothermal energy is used for milk pasteurisation in parallel with air conditioning and after the milk pasteurisation geothermal energy will be provided for greenhouse heating and then for a cooling storage.
With this application we are going have reduction of CO2 emission and we are going to succeed a local sustainable development.
The aim of the proposed project consists a sustainable environmental protection by considerably reducing the emission of pollutants caused by fossil fuels in the municipality of Koutso.
Economic efficiency will be ensured by multiple utilization of thermal water, i.e. energetic utilization and material utilization.
An additional aim consists of ensuring a safe thermal energy supply for the population and of reducing the foreign trade deficit of the Community by using domestic renewable energy resources.
Another superordinate aim is the promotion of communication within the Community. This will be achieved by cooperation with EU-partners and, subsequently, by presentation of the project results with our Community.
The expected results are :
- reduced emission of pollutants such as H2S, CO2, SO2, NOx, etc.
Results that provide information on the operation, by means of up-to-date remote control technology, of a geothermal facility with simultaneous cascade-style energetic and material utilization.
Spreading of these alternative energies over EU, because the largest part of geothermal resources available with the EU consists of low-energy resources.
Application of the system all over the EU demonstrative effect of the bivalent heating systems.
- reduction of the electricity consumption through the expected higher operating coefficient of each application.
- protection of fossil fuel resources and reduction of the imported fuel.
The optimal design for the cascade use of air-conditioning of the building, milk pasteurisation, greenhouse heating and cooling storage will take place having in our mind the cover of all energy heating and cooling demands with the minimum total cost.
We will study the air-conditioning of the public buildings within the Municipality of Koutso, the thermal energy demanded for milk pasteurisation of Delta SA, the heating demands for 5000 m² greenhouse and the energy for a cooling storage with a cooling ability of 126 RT.
The productive boreholes are around 2500 km away from the applications. The geothermal fluid will be transferred to a heat exchange centre and after the heat exchange the geothermal water will be reinjected.
This thermal centre will operates also as the control room for the quality, the quantity and the good operation of the whole system.
The factor for the energy demands of a building is considered to be 400 Kcal/h °K for a representative building with an average surface 100 m². The total surface of the public buildings that we have in our case is around 2300 m², including the schools, the churches, the town-hall, the centre for the information for the farmers etc. The total energy for the air-conditioning of the buildings is 9200 Kcal/h °K. The heating demands will be covered providing the thermal energy of the water to a hot water driven absorption unit.
The technical specifications of the milk pasteurisation unit are 50 ton/day with an inlet temperature of 75°C and outlet temperature is 45°C for 140 kg of milk every 40 sec. We are going to have an installed power of about 96 kW. This pasteurisation unit is going to work 365 days/year and 4h/day covering the daily production as it is today.
The geothermal greenhouse that we are going to construct is going to have glass as cover material. The proposed cultivation is tomato and the greenhouse will produce 60000 kg per year, that mean 20000 kg per period (three times in a year). The optimal inside temperature for tomato is 14°C and the geothermal greenhouse has a specific thermal demand of 45000 Kcal/h°K.
The cooling storage with a coefficient of performance (COP) 3.5 will supply 440 kW for the cooling demands and need an electric energy of around 117 KW. The cooling demands of the cooling storage will have a temperature of around 54°C. This water will be used for the greenhouse heating. The outlet of the pasteurisation will be a hot water with a temperature of around 56°C. This water will be deposited to the same pipe with the one of the air-conditioning unit.
Part of the mixture of these above-mentioned pipes will be transferred to the pipe for the heating of the greenhouse. The greenhouse will operate with a ground thermal system. Specific plastic pipes will be place 40-50 cm underground, so this system will help to put heater to the wall and to the roof of the green house. Before the entrance of the water to the greenhouse we will put by pass pipe with a pneumatic valve for the regulation of the air temperature. The other part of the above mentioned mixture will be transferred to the pipe for primary circuit of the cooling storage in a temperature of around 55°C. The back up system will be a couple of generating electricity to give energy whenever is necessary to the system.

Appel à propositions

Data not available

Régime de financement

DEM - Demonstration contracts

Coordinateur

TIFIN SA
Contribution de l’UE
Aucune donnée
Adresse
45th SOPHOKLEOUS STR.
10552 Athens
Grèce

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Coût total
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