Greenhouses Dehumidification, Preventive Approach And Energy Balance

Abstract : The use of increasingly airtight greenhouses to save energy has led to increasing humidity levels inside the greenhouse. High humidity and poor ventilation are linked to common greenhouse plant diseases such as Botrytis cinerea. Presently, the most common method used by growers to decrease humidity is the ventilation-heating method which involves inevitably an increase in energy consumption. Thus, to manage the greenhouse climate, it is necessary to reconsider the economic and environmental acceptability of this method. In this objective, we have proposed the development of a multifunction dehumidifying heat pump whose main role is to maintain the plant-leaf temperature above the dew point during the night with low energy consumption. In this study, we analyzed the effectiveness of this heat pump installed in a 2350-m² double wall inflatable greenhouse located in northwestern France. Hydrangeas in containers were placed on the ground (heated). The temporal evolution of climatic, thermodynamic and energetic data is presented and analyzed. The thermodynamic efficiency of the machine is taken into account
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Submitted on : Thursday, December 12, 2013 - 5:45:09 PM
Last modification on : Wednesday, June 5, 2019 - 1:39:10 AM

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  • HAL Id : hal-00918010, version 1

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Gérard Chasseriaux, Christophe Migeon, A. Pierart, D. Lemesle, A. Travers. Greenhouses Dehumidification, Preventive Approach And Energy Balance. 2012, n.p. ⟨hal-00918010⟩

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