Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 490861
Title Tomatenteelt in de hooggeïsoleerde VenLow Energy Kas
Author(s) Zwart, H.F. de; Janse, J.; Kempkes, F.L.K.
Source Bleiswijk : Wageningen UR Glastuinbouw (Rapport GTB 1366) - 34
Department(s) GTB Tuinbouw Technologie
GTB Teelt & Gewasfysiologie
Publication type Research report
Publication year 2015
Keyword(s) glastuinbouw - kastechniek - tomaten - solanum lycopersicum - energiebesparing - energiegebruik - kassen - constructie - isolatie (insulation) - ontvochtiging - doelstellingen - haalbaarheidsstudies - greenhouse horticulture - greenhouse technology - tomatoes - solanum lycopersicum - energy saving - energy consumption - greenhouses - construction - insulation - dehumidification - objectives - feasibility studies
Categories Greenhouse Technology / Cropping Systems
Abstract In the research program Greenhouse as Energy Source aims at having energy-neutral operated greenhouses by 2020. Therefore, a reduction of the energy use is important. The highly insulated VenLow Energy greenhouse have shown a low energy consumption for several years and in 2014 it was attempted to bring it below 10 m³ of natural gas equivalents per m² without a lowered production. To achieve this the leakage had to be reduced further and the screen quality was improved and a high humidity control setpoint was accepted. This in order to reduce the evaporation. Also the manipulation of the EC in the slab could lower the crop transpiration related energy consumption. The experiment showed an energy consumption of 8 m³/m² per year without a decreased crop production. This is far below target, but 2014 was a historically warm year. However, simulations showed that even in an average Dutch year the measurements taken would have met the target. The manipulation of the EC of the slab worked adversely, meaning that it increased the crop transpiration. The conclusion reads that the measures taken in the greenhouse make a productive tomato crop with less than 10 m³ of gas equivalents per m² per year realistic. With respect to the climate, a high humidity must be accepted and a shortened growing season running from mid-January to late November. A tomato variety like Komeett will yield at least 70 kg/m² can be expected, providing that CO2 dosing is not related to gas consumption for heating.
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