INFLUENCE OF STRUCTURAL FEATURES AND PLANT GROWTH ON TEMPERATURES IN GREENHOUSE STRUCTURE WITH PARTICULAR EMPHASISON PLASTIC GLAZED STRUCTURES

J.N. WALKER, D.J. COTTER
The introduction of plastic glazing to greenhouse structures and the trend towards new methods of heating and ventilating has resulted in a need for research on how changes in structural design or equipment affect the greenhouse environment. To provide an analytical approach to these problems, a relationship was developed which permits the prediction of temperature within a greenhouse.

To illustrate the usefulness of this relationship and to point out the significance of various structural and/or equipment changes, the relationship was applied to typical greenhouse situations. In particular the influence of multiple glazings and thermal radiation transmittance of the glazing material on the heat requirement of greenhouses was determined. For summer conditions the influence of air exchange rate, evapo-transpiration rate, solar transmittance of the glazing material, multiple glazing, and thermal radiation transmittance was evaluated. Of these the effect of multiple glazings in the winter and air exchange and evapotranspiration rate in the summer were most significant.

WALKER, J.N. and COTTER, D.J. (1968). INFLUENCE OF STRUCTURAL FEATURES AND PLANT GROWTH ON TEMPERATURES IN GREENHOUSE STRUCTURE WITH PARTICULAR EMPHASISON PLASTIC GLAZED STRUCTURES. Acta Hortic. 6, 26-46
DOI: 10.17660/ActaHortic.1968.6.3
https://doi.org/10.17660/ActaHortic.1968.6.3
6_3
26-46