Open AccessCALCULATION METHOD OF CULTIVATION FACILITY COMBINED HEATING SYSTEM USING WINTER GREENHOUSE AS AN EXAMPL
Author(s) -
Mikhail Pavlov,
Денис Карпов
Publication year - 2019
Publication title -
vestnik bgtu im. v.g. šuhova
Language(s) - English
Resource type - Journals
ISSN - 2071-7318
DOI - 10.34031/2071-7318-2019-4-12-47-55
Subject(s) - greenhouse , environmental science , radiant heating , microclimate , heating system , infrared heater , meteorology , convection , humidity , radiant cooling , atmospheric sciences , ceiling (cloud) , nuclear engineering , infrared , materials science , mechanical engineering , engineering , physics , optics , history , archaeology , horticulture , biology , composite material
Modern systems of artificial heating of cultivation structures on the example of winter greenhouses intended for year-round use require the development of sufficiently accurate and reliable methods of calculation. According to the calculations, a decentralized heating system of agricultural facilities, which includes only ceiling infrared heating elements, is justified only in a moderately cold period of the year. At lower outdoor temperatures, mainly in January, the indoor temperature may drop below standard values due to the specifics of radiant heating. Therefore, the article considers the method of calculating heat power of the radiant and convective heating system that includes infrared emitters for soil heating and convective heating devices for maintaining the target indoor air temperature. The calculation procedure of radiant and convective (combined) heating system comes to the calculation of incoming and outgoing heat and mass fluxes as well as finding unknown microclimate parameters (first of all, inside air temperature) that form design heat and humidity conditions of an agrobiotechnological facility. The proposed calculation method has been tested at the industrial greenhouse “Fermer 7.5”.