ISHS Acta Horticulturae 399: Greenhouse Environment Control and Automation
GREENHOUSE CLIMATE CONTROL: CONSTRAINTS AND LIMITATIONS |
| Author: | J.C. Bakker |
| Keywords: | climate control, constraints, limitations, greenhouse, models |
| Abstract:
Over the last decades climate control has evolved from manual to digital but the basic principle remains still the same: optimizing the final yield under all given (climate, technical, economical) circumstances, by avoiding conditions that limit crop production. Originally this was done by avoiding extremes (bounds or constraints). More detailed knowledge of these constraints may be helpful in optimizing the use of the traditional rule based controllers. Within the recent developments of optimal climate control, bounds (or constraints) are necessary for information that is not quantified in (crop) growth models, e.g. concerning risk prevention and maintaining the long term production power. These constraints form the boundary conditions for the momentary optimization and thereby may strongly influence the final results, so specification is required. For a successful implementation of climate control systems in commercial practice, however, also other (e.g.technical) limitations have to be dealt with before the use of these systems will result in the additional profit which is aimed at. A review is presented of constraints for several environmental factors and the main underlying plant processes, together with today's main limitations for the practical application of (modern) climate control systems. | |
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