Open AccessCFD to analyze energy exchange by convection in a closed greenhouse with a pipe heating system
Author(s) -
Jorge Flores-Velázquez,
Federico VillarrealGuerrero,
Abraham Rojano-Aguilar,
Uwe Schdmith
Publication year - 2019
Publication title -
acta universitaria
Language(s) - English
Resource type - Journals
eISSN - 2007-9621
pISSN - 0188-6266
DOI - 10.15174/au.2019.2112
Subject(s) - greenhouse , noon , environmental science , convection , meteorology , atmospheric sciences , computational fluid dynamics , humidity , mechanics , geology , geography , horticulture , biology , physics
In some locations with harsh winters, the heat stored in the soil may not be enough to heating a greenhouse, and so artificial heat must be supplied. The objective of this study was to evaluate a numerical model under local weather conditions, in Humboldt University of Berlin, Germany, during winter 2011 to analyze the air dynamics generated through a tube pipe heating system convection in a closed greenhouse, for it to be applicable in producing cold regions in Mexico. Results showed that 100 W m-2 of heat released from the soil kept the environment within acceptable ranges for plant growth from noon to evening. However, the energy lost by long-wave radiation during the night lowered the air temperature to minimal basal temperature. Heat from the pipes placed underneath the crop promoted air movement by convection, producing a uniform distribution of temperature and humidity within the plant canopy.