Skip to main content
Aller à la page d’accueil de la Commission européenne (s’ouvre dans une nouvelle fenêtre)
français fr
CORDIS - Résultats de la recherche de l’UE
CORDIS
Contenu archivé le 2022-12-27

ENERGY SAVING IN DOUBLE CLAD CLIMATE CONTROLLED GREENHOUSE

Objectif

To demonstrate energy saving in a greenhouse tomato cultivation utilising ultra-violet inhibited polyethylene and a microcomputer based climatic control system.
A 50% energy saving is forecast in comparison with a conventional greenhouse while the payback time is estimated at 6.5 years.
The major modifications to the project as originally proposed were to the heating and control systems. The fuel used was changed to oil because of on-going difficulties in running the gas-based heaters and the heating load was changed entirely onto two free-standing air heaters rather than incorporating the burners used for CO2 production. A commercial greenhouse control computer was used instead of an in-house controller because of increased possibilities for replication.
The project has been a technical success in that it demonstrated a reduction in energy usage of between 40% and 50% when compared to a glasshouse with the same heating system and of the same size in a similar location. Fuel use results were verified by determination of an overall heat transfer coefficient or U-value for the structure. This also showed a reduction to levels expected. The overall suitability of the growing system for producing a satisfactory tomato crop has been demonstrated and it could produce crops at an economic level. Those problems which result from the air-tightness of the structure i.e. control of humidity and crabon dioxide enrichment and the necessary balancing of the two requirements have been satisfactorily resolved.
Economic viability of the system has not been demonstrated. This was mainly due to a downturn in the domestic market for tomatoes and increasing costs. Despite a crop yield which met expectations an operating loss was sustained. It is believed that if the market situation improves then the system can be profitable.
An 8 span 2500 m2 greenhouse will be constructed from 35 mm galvanised tubular steel. The frame will be clad with a double layer of UV inhibited polyethylene.
Forced ventilation, CO2 enrichment, propane air heaters and thermal screens are used to optimise growing conditions in the greenhouse. The heating system will be based on direct fired gas heater and indirect free standing air heaters. A number of distributions fans are also installed to mix air at a distance from the heaters. Root zone warming (a piped heating system which runs below the growing modules) is also incorporated.
The thermal screens, composed of aluminated polyester, are drawn over the crop at night to reduce heat loss. Ventilation is achieved through seven 1.2 metre fans. Enrichment of the CO2 level in the greenhouse is by means of three direct fired propane burners.
In order to optimise the climatic conditions within the greenhouse a microcomputer is linked to temperature, humidity and CO2 sensors which automatically control the operation of the heaters, ventilators and CO2 burners.

Champ scientifique (EuroSciVoc)

CORDIS classe les projets avec EuroSciVoc, une taxonomie multilingue des domaines scientifiques, grâce à un processus semi-automatique basé sur des techniques TLN. Voir: Le vocabulaire scientifique européen.

Ce projet n'a pas encore été classé par EuroSciVoc.
Proposez les domaines scientifiques qui vous semblent les plus pertinents et aidez-nous à améliorer notre service de classification.

Vous devez vous identifier ou vous inscrire pour utiliser cette fonction

Programme(s)

Programmes de financement pluriannuels qui définissent les priorités de l’UE en matière de recherche et d’innovation.

Thème(s)

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.

Appel à propositions

Procédure par laquelle les candidats sont invités à soumettre des propositions de projet en vue de bénéficier d’un financement de l’UE.

Données non disponibles

Régime de financement

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.

DEM - Demonstration contracts

Coordinateur

COLM WARREN (POLYHOUSES) LTD
Contribution de l’UE
Aucune donnée
Adresse
KILMURRAY TRIM 19 SANDYMOUNT AVENUE
CO. MEATH
Irlande

Voir sur la carte

Coût total

Les coûts totaux encourus par l’organisation concernée pour participer au projet, y compris les coûts directs et indirects. Ce montant est un sous-ensemble du budget global du projet.

Aucune donnée
Mon livret 0 0