EXPERIMENTAL AND ANALYTICAL DETERMINATION OF CRITICAL TEMPERATURE POINTS OF THE GREENHOUSE

In greenhouse, soil is the main heat accumulator, and its rational use a very urgent task, which can be successfully solved only with full automation of transfer missing thermal energy. To do this, it enough to determine following parameters in greenhouse: maximum daily temperatures air inside outside, distribution temperature maxima during day, relative position time balancing half-space greenhouse morning evening, or point reversal flow. The were determined experimentally over continuous 11 days, then approximated third-order polynomial equations reliability 0.92 ... 0.96, analytical studies carried out on them. calculated by equating first derivatives zero solving quadratic equation. points from system for changing (points intersection graphs). Similarly, equations, critical transition negative zone (t=0ºC). same method was used calculate optimal moments switching off source, topt introduced into each cultivated plant. A differentiated heating proposed terms consumption, consists ensuring minimum supply additional daytime optimum at nighttime points.