Research of grain storage technology of large warehouse in northeast China;

Three large warehouses were selected for in-store drying of corn.

According to the characteristic of high temperature and high humidity in south Chine,choosing the best opportunity to control insects and the suitable control dose,and improving the heat insulation,the large warehouse may realize the recirculation fumigation once a year to kill the stored grain insect thoroughly,reduce the dose,delay aging speed of the grain quality.

Making use of the advantage time in low temperature in winter and spring,using method of mechanical yen- tilation for bulk wheat in the large storehouse to descend grain temperature,thereafter,sealing the grain bulks, heat insulating to prevent pest.

Making use of advantageous time of low temperature in winter and spring,mechanical ventilation for bulk wheat in large storehouse was carried out to descend grain temperature,thereafter,heat insulating and sealing the grain bulks and low temperature grain storage test was carried out.

Mechanical ventilation with the cages on the ground was tested in large steel warehouse.

Stratificated air conditioning system design for a large space workshop;

Analyses heat source characteristics and air d istribution design in the large space workshop and presents design of the strati fied air conditioning system.

Presents a stratificated air conditioning system with single duct and low velocity air supply in the large workshop of an 18 m span, gives its main design indices, air distribution, temperature and humidity control, air treatment and exhaustion, etc.