P. Frangi, R. Piatti, G. Amoroso
Increasing energy costs lead greenhouse growers to introduce simple technologies to decrease fuel consumption for heating without decreasing plant quality. Thermal screens reduce the air volume to be heated in a greenhouse, providing an insulation that prevents the loss of radiative heat to the external environment during the night. The purpose of this trial was to compare two different thermo-reflective screens evaluating their performance in terms of both energy consumption and plant growth. Two compartments of an experimental greenhouse located at Fondazione Minoprio (Como, Italy) were equipped with thermo-reflective screens: one with Aluminet 70I/70IC screens and the other one with Svensson XLS17F/ILS70 screens. Two cultivation cycles of ornamental potted plants (poinsettia and New Guinea impatiens) were performed in the two compartments during the cold months of the 2007-2008 season. Heat meters were used for monitoring the energy consumption, while plant growth was evaluated at the end of each cycle. One of the tested cultivars of poinsettia (‘Christmas Feelings’) showed a greater plant diameter under Aluminet screens. Growth and flowering parameters of the New Guinea impatiens cultivars tested resulted in some cases related to the screen typology. At the end of the poinsettia cultivation cycle Svensson screens allowed 17% of energy saving compared with Aluminet screens. A similar result (-18.8% of consumption) was detected also for New Guinea impatiens.
Frangi, P., Piatti, R. and Amoroso, G. (2011). EVALUATION OF DIFFERENT SCREENS FOR ENERGY SAVING IN THE GREENHOUSE. Acta Hortic. 893, 275-279
DOI: 10.17660/ActaHortic.2011.893.22
energy consumption, Euphorbia pulcherrima, Impatiens hawker, thermo-reflective screens

Acta Horticulturae