Efeito do resfriamento evaporativo e da ventilação forçada no conforto térmico ambiental de verão, em maternidades de suínos.

Abstract

This experiment was carried out from January 20th to February 20th, 1996, in order to evaluate the effect of the forced ventilation and evaporative cooling on the improvement of the thermal conditions on swine maternity. The maternity had four rooms, with eight parturition cages each, being the sows housed four days before parity. The treatments consisted of forced ventilation, evaporative cooling with a sprayer connected to the ventilator, evaporative cooling with pad material and ventilator, and a witness. The globe temperature and humidity index, radiant heat load, air relative humidity were calculated from the climatic data. The results showed that the evaporative cooling systems presented the best environmental thermal conditions for the lactation sows.