ISHS Acta Horticulturae 797: International Workshop on Greenhouse Environmental Control and Crop Production in Semi-Arid Regions
FEASIBILITY OF AN ADAPTIVE LIGHT FILTER USING A WATER FILM CONTAINING PARTICLES |
| Authors: | J. Ruigrok, E. Janssen, H. Oversloot |
| Keywords: | daylight management system, NIR filter, greenhouse climate, energy reduction |
| Abstract:
During hot summer days the radiation of the sun heats the greenhouse. A disturbed balance of temperature, CO2, RH and sunlight, inside the greenhouse is suboptimal for the production of the crops. Netherlands Organisation for Applied Scientific Research, TNO, has developed a new concept with which it is possible to tune the filtering effect within the minute. The system consists of a water flow on the roof. In the water, particles are dissolved which filters part of the sunlight, especially Near Infra-Red (NIR). By altering the concentration it is possible to tune the filtering effect to the needs. A model has been made to predict the effects and working principle of the system itself and the climate inside the greenhouse. The model can take into account the effects of temperature, humidity, wind speed, flow rate, etc. The model is used to evaluate the concept in different climate regions. | |
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