SERASAN

Internal Temperature Control

» One of the benefits of growing in greenhouses; It is the possibility of controlling the basic factors affecting environmental control such as light, humidity, temperature, carbon dioxide (CO2) amount and ventilation rate required for plant breeding in the production environment.Among these factors, one of the most important factors affecting plant growth in the greenhouse is temperature.Plant species grown in the greenhouse need different optimum growth temperatures during their growth stages.The increase or decrease of these temperature values directly affects the yield and quality parameters of the plant.In warm and sunny days in temperate climatic regions, due to the large amount of heat energy gained from solar radiation in the greenhouse environment, the temperature values in the indoor environment may exceed the optimum temperature values required for the plant.This increase affects the production and marketable fruit quality of the plant. To control the temperature increase in the greenhouse during these periods; one or more of the ventilation, shading and cooling methods are used together.Natural ventilation takes place under the influence of wind and indoor-outdoor temperature difference (gravity).In compulsory ventilation, fans are used.In addition, while covering materials with different light transmittance help reduce the greenhouse temperatures during the transition seasons such as autumn and spring, they cannot keep the high temperatures that occur in the greenhouse in the optimum limits required by the plants in summer.In these periods, evaporative cooling methods are used in order to lower the greenhouse temperatures.These methods are systems that can convert the sensible heat of the air to latent heat and decrease the indoor air temperature below the outdoor air temperature. In this study; Ventilation (natural and mandatory), shading and evaporative cooling methods used for reducing the effects of high temperatures in greenhouses have been evaluated with their advantages and disadvantages.





OTHER CLİMATE CONTROL SYSTEMS