Predicting the energy consumption of heated plastic greenhouses in south-eastern Spain
Author
López Hernández, J.C.; Baille, Alain Daniel; Bonachela Castaño, Santiago; González Real, María Milagros; Pérez Parra, Jerónimo J.Knowledge Area
Ingeniería AgroforestalPublication date
2006-10Publisher
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)Bibliographic Citation
LÓPEZ, 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-XPeer review
siKeywords
Aire calienteModelo de consumo de energía
Phaseolus vulgaris
Temperatura
Air heating
Energy use model
Phaseolus vulgaris
Temperature
Abstract
[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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