What are the components of standard greenhouse?
Answers
Greenhouse production is a year round proposition. In Alberta this means providing an optimal indoor growing environment when the outside environment can be warmer and drier, or colder than what the crop plants require, and in the case of our winters, can even survive. Periods during the winters can drop to - 30 to - 40 °C, the temperature differential between the greenhouse environment and the outdoors can range from 50 to 60 °C . Conversely, during the summers the outdoor temperatures can rise to +35 °C under the intense Alberta sunlight; this is especially true in southern Alberta . Greenhouse temperatures rise under intense sunlight. This rise in temperature is referred to as "solar gain". To enter the greenhouse, light has to travel through the greenhouse covering, in doing so the light loses some of its energy which is converted to heat. Without a cooling system, the temperature within the greenhouse can rise to over + 45 °C. To successfully optimize the environment within the greenhouse means countering the adverse effects of the external environment as it varies over the normal seasons of the year.