calculation of air to combat the excessive heat
Calculation of ventilation to combat the excessive heat produced by two or three periods.
Most notable the first period - summer - when the outside temperature is above - (-10 В° C. The calculation is for an outside temperature of the warm period of the year on the parameters A (SNIP IT. 7-62). If the supply air enters through the open doorways (aeration or natural flow and mechanical ventilation), the estimated outdoor temperature tn is the temperature of incoming air, ie, tu = tu. If the supply air is fed mechanically (usually when you need filtering or cooling), it must be heated air supplied to the fan. The degree of heating the air is different - from 0,5 to 1,5 В° C. It can take an average, the air is heated in the ventilator at 1 В° C.
Second period - a transition, when the incoming air still needs to be heated (except for aeration). When a hot air inlet system performance is calculated precisely in the transition period, ie, when the outside temperature is +10 В° C.
Third period - winter - when the outside temperature of the cold period of the parameter A. The calculation of air for this period does not always happen. Usually, the winter air is taken as defined by the transition period.