It take tobacco cutting of pneumatic conveying as the primary guide line to select pneumatic conveying parameter,such as conveying speed and conveying ratio.

For the real-time production situation of cigarette factory, in thethesis, optimization of the process parameter (such as conveying speed andconveying ratio) is tentatively studied.

Numerical simulation of air supply velocity on air conditioning effects;

Experimental result shows better use effect can be reached by means of setting reasonable air supply direction and air supply velocity.

Based on the theory and experiment research of the characteristic of the refrigerated vertical open display cabinets, the method of reasonably select the main structural parameters including air supply velocity,evaporator structure and defrost cycle etc were discussed.

Furthermore,based on the measurement at a gymnasium,the variation relationships between the vertical temperature gradient and supply air velocity were obtained.

Analyses the influence of supply air velocity on thermal comfort by experiments.

Investigates the influence of supply air velocity and heat release rate on air distribution in working area.

When all-air system with air return runs in the mode of all fresh air supply in summer and winter, there are some problems in air condition system, such as diameter of fresh air pipe is too small, the refrigerating effect of cool source don t suffice the need of air supply and air handling equipment handle air in low efficiency.