A STRATEGY FOR CALCULATING THE MAXIMUM COOLING LOAD OF A GREENHOUSE

Z. Quan, T. Takakura
A computational model is developed to predict the maximum cooling load of a greenhouse equipped with a refrigerator cooling system and multi-layered screens. It is necessary to determine the capacity of refrigerator that have come into use in greenhouses and in several greenhouse type plant factories in recent years. Results given by the model are compared with experimental measurements. The agreement was generally good.

Simulations were performed with this model. The outside weather conditions were inputs as boundary conditions while the output results were the removed heat at a pipe line or at a fan convector and its components such as heat transmission, heat transfer by ventilation etc. Some works of practical importance have been done :

  • Weather conditions corresponding to the maximum cooling load were discussed and some idea of getting the data for the calculation were proposed.
  • Relation between the cooling load and the time required for the inside air temperature drop from the point of cooling start to a set point was explicated.
  • Heat transfer coefficients such as the cooling load coefficient (a parameter defined after the heating load coefficient), overall heat transmission coefficient etc. for the calculation of the maximum cooling load in nighttime were given.
Quan, Z. and Takakura, T. (1988). A STRATEGY FOR CALCULATING THE MAXIMUM COOLING LOAD OF A GREENHOUSE. Acta Hortic. 230, 519-526
DOI: 10.17660/ActaHortic.1988.230.68
https://doi.org/10.17660/ActaHortic.1988.230.68

Acta Horticulturae