Energy efficient climate control for cut flower alstroemeria

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Like in most countries, in the Netherlands energy consumption is an increasing cost component. In cut flowers grown at a relatively low temperature, most of the energy is used for dehumidification. In Alstroemeria dehumidification is especially important to prevent the physiological disorder expressed as necrotic leaf tips. Research has been carried out showing that improved climate control can save 37% on heating, without a reduction on yield and even a quality, compared to a contemporary reference. Showing less necrotic leaf tips, the quality was better in the greenhouse with the energy saving strategy in December and January. This result was realized with a novel dehumidification system, a double thermal screen and temperature integration. When vapour pressure deficit was below 1.9 g/m3, outside air was blown under the canopy with an air distribution system for dehumidification. If necessary, this outside air was first heated to greenhouse temperature to prevent an inhomogeneous temperature distribution. The reference greenhouse, controlled at the same humidity set point, used a combination of slightly opening the thermal screen followed by slightly opening the vents to carry off moisture. Eventually, at a vapour pressure deficit of 1.5 g/m3 the temperature of the heating pipe was risen to lower the humidity. In the greenhouse with the energy saving concept no heating pipe for dehumidification was needed. The performance of the energy saving concept proved to be efficient.
Original languageEnglish
Title of host publicationISHS 28th Int. Horticultural Congress - Science and Horticulture for People (IHC 2010): International Symposium on Greenhouse 2010 and Soilless Cultivation
EditorsN. Castilla, O. van Kooten, S. Sase, J.F. Meneses, W.H. Schnitzler, E. van Os
Place of PublicationLisbon, Portugal
ISBN (Print)9789066057241
Publication statusPublished - 2012
Event28th International Horticultural Congress -
Duration: 22 Aug 201027 Aug 2010


Conference28th International Horticultural Congress


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