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Greenhouses climate modelling. Tests, adaptation and validation of a dynamic cl...
Baptista, Fátima; Bailey, Bernard; Meneses, Jorge; Navas, LuísMost greenhouse climate models are specific for a particular combination of greenhouse type, crop, region and weather conditions. Models are formulated and validated for those conditions and it is not easy to directly extrapolate them to other, different conditions. In order to use them the coefficients need to be calibrated by experimental work, followed by validation of the adapted model. The main purpose of ...
Statistical modelling of the microclimate in a naturally ventilated greenhouse
Litago, Javier; Baptista, Fátima; Meneses, Jorge; Navas, Luís; Bailey, Bernard; Sánchez-Girón, VictorThe time-series models introduced in this paper were developed to estimate and forecast temperature and humidity dynamics in an unheated, naturally ventilated greenhouse in Lisbon, Portugal. External and internal climatic data recorded over four consecutive months during the tomato (Lycopersicon esculentum, Mill) growing season were used to build and validate forecasting models for simulating environmental cond...
Greenhouse ventilation rate: theory and measurement with tracer gas techniques
Baptista, Fátima; Bailey, Bernard; Randall, John; Meneses, JorgeLeakage and ventilation rates were measured in a four span glasshouse at Silsoe Research Institute. Two tracer gas techniques were used, a decay rate method with different positions of the leeward ventilator (0, 10 and 20% of the maximum opening) and a continuous injection method with the leeward ventilators open 10%. The influences of wind speed, wind direction and temperature difference between inside and out...
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