Articles
A KNOWLEDGE BASED SYSTEM FOR THE CONTROL OF A GREENHOUSE ENVIRONMENT
Article number
174_57
Pages
425 – 432
Language
Abstract
An experimental greenhouse has been constructed from Melinex panels which are air inflatable.
Unlike a conventional glasshouse which is subjected to infiltration and constant air changes, the Melinex greenhouse creates a sealed unit which accumulates humidity through plant transpiration.
Excessive water vapour, whilst being detrimental to the healthy growth and quality of the crop, is a valuable source of heat energy.
Unlike a conventional glasshouse which is subjected to infiltration and constant air changes, the Melinex greenhouse creates a sealed unit which accumulates humidity through plant transpiration.
Excessive water vapour, whilst being detrimental to the healthy growth and quality of the crop, is a valuable source of heat energy.
Dehumidification of the greenhouse is achieved by a heat pump which also provides the basic heating load.
Excess latent heat is stored in a water heat store for use in adverse weather conditions.
The system components are linked through a microprocessor based controller.
An experimental control algorithm has been designed and implemented on a Z80 based microcomputer, and data related to the internal and external environment has been recorded.
The control algorithm includes facilities to react to a set of changing conditions which are incorporated as control strategies within the algorithm.
Results from the algorithm’s performance are presented.
Publication
Authors
C.M. Leung, D.R. Wilson, C.J. Marquand, S.A. Tassou
Keywords
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