FEEDFORWARD CONTROL FOR A FLOOR HEAT GREENHOUSE

Floor heating is a promising technique to heat greenhouses using low q uality energy. The large thermal inertia of floor heating systems requ ires some form of predictive control. To analyze the effectiveness of feedforward logic, first a prediction model has been developed and the n an experiment using a controlled-environment chamber has been conduc ted. Basic control logic has been established and verified for control ling air temperature by energy input only to the floor. The combinatio n of feedforward and feedback control should be the next step.