Objectif
To demonstrate :
- that the required extension of the cooling capacity in the hospital can be realised by storage or " winter cold" in a sand-layer (aquifer) in the soil, and that such a storage system can be integrated in the existing cooling system.
- the technical and economical feasibility of combined seasonal cold and heat storage in an aquifer for cooling and (pre)heating ventilation supply air.
- the advantages of also using the aquifer for short time storage of cold, that is loaded at night with the already chillers, thus creating extra facilities for energy management and compensating for risks of cold shortage due to climatic influences.
The system functions in accordance with the design. The first results from monitoring are available. During the first summer (1993) the storage system delivered 105 MWhth cold, which corresponds to a saving of 34,000 kWhe electricity compared to the coventional chillers. Additional cooling with chillers was necessary because cold had not yet been stored. In the winter '93/94 200 MWhth cold was stored and 29,000 m3 natural gas was saved for preheating ventilation air.
In the first half of the summer 1994 (April, May, June and July) the storage delivered 256 MWhth cold and 82,000 kWhe electricity was saved. No additional cooling was applied thanks to the lower temperature in the cold storage.
In this project the extension of the existing cooling capacity will be realised with an Aquifer Thermal Energy Storage (ATES) instead of a conventional chiller. Compared with a chiller the use of ATES reduces the electricity consumption for cooling by 50%.
Moreover the heat, that is extracted from the ventilation supply air in summer, is stored in the aquifer to be utilized in winter for (pre)heating the ventilation air.
The integration of the ATES system in the present installation with 2 chillers enables also short-term cold storage in summer. Thus the risk of cold shortage due to climatic influences (warm summer and/or mild winter) will be compensated without costly investments in extra chiller capacity.
The combined use of the aquifer system for both seasonal cold and heat storage, as well as short-term cold storage makes the system more profitable. Consequently ATES can also be attractive for smaller projects with existing cooling systems that have to be extended. This will enlarge the market potential for ATES.
The project has 3 phases : engineering, realisation and monitoring and evaluation.
In the engineering phase the design will be worked out in more detail. Especially the sizing of air-water heat exchangers and the control of the system ask special attention.
In the realisation phase the building installation (heat exchangers, air conditioning units, piping, pumps, control system, etc.) and the storage installation (wells, piping, well-pumps, etc.) will be realised.
The monitoring and evaluation phase concerns the following :
- testing the working of the system components and the control system; perform modifications if necessary.
- measurement of water flows, water temperatures and the control system; perform modifications if necessary.
- measurement of water flows, water temperatures, climatic data, working hours, etc.
- comparison of the measurement results with expectations based on the feasibility study.
- periodic inspection of the heat exchanger to monitor eventual corrosion phenomena.
Programme(s)
Programmes de financement pluriannuels qui définissent les priorités de l’UE en matière de recherche et d’innovation.
Programmes de financement pluriannuels qui définissent les priorités de l’UE en matière de recherche et d’innovation.
Thème(s)
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Les appels à propositions sont divisés en thèmes. Un thème définit un sujet ou un domaine spécifique dans le cadre duquel les candidats peuvent soumettre des propositions. La description d’un thème comprend sa portée spécifique et l’impact attendu du projet financé.
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Procédure par laquelle les candidats sont invités à soumettre des propositions de projet en vue de bénéficier d’un financement de l’UE.
Régime de financement
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Régime de financement (ou «type d’action») à l’intérieur d’un programme présentant des caractéristiques communes. Le régime de financement précise le champ d’application de ce qui est financé, le taux de remboursement, les critères d’évaluation spécifiques pour bénéficier du financement et les formes simplifiées de couverture des coûts, telles que les montants forfaitaires.
Coordinateur
2803 Gouda
Pays-Bas
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