Predicting the energy consumption of heated plastic greenhouses in south-eastern Spain
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AuthorLópez Hernández, J.C.; Baille, Alain Daniel; Bonachela Castaño, Santiago; González Real, María Milagros; Pérez Parra, Jerónimo J.
Knowledge AreaIngeniería Agroforestal
PublisherInstituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)
Bibliographic CitationLÓPEZ, J.C., BAILLE, A., BONACHELA, S., GONZÁLEZ REAL, M.M., PÉREZ PARRA, J. Predicting the energy consumption of heated plastic greenhouses in south-eastern Spain. Spanish Journal of Agricultural Research, 4(4): 289-296. Octubre 2006. ISSN 1695-971-X
Modelo de consumo de energía
Energy use model
[ENG] Measurements of heat consumption in a parral type greenhouse, equipped with an air-heating system, were carried out in south-eastern Spain (Almería) during the 1998/99 winter. From the daily values of heat consumption (Qd, MJ m-2 d-1) recorded in five identical greenhouses heated to different night temperature set-points (Tc), and data of minimum outside air temperature (Te,min), relationships between Qd and the temperature difference (ΔTmin = Tc – Te,min) were established. Linear regressions between Qd and ΔTmin gave satisfactory fits (R2 ranging from 0.75 to 0.83), considering that Te,min was the only input data for the model. When all data were pooled, the correlation was curvilinear, the best fit to a 2nd order polynomial being Qd = 0.049 ΔTmin 2 – 0.001 ΔTmin + 1.107 (R2 = 0.89). Validation of this model was performed using data obtained during other years, giving a fair agreement at the daily (R2 = 0.86), 10-day (R2 = 0.95) and yearly (R2 = 0.99) time scales. This ...
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