Optimized design method for impacting jet ventilation system

Abstract

The invention relates to an optimized design method for an impacting jet ventilation system. The optimized design method comprises the step that one or more air supply openings capable of vertically supplying air to the ground are formed in the position a certain distance away from the ground. The optimized design method is characterized in that the necessary air supply distance of the air supply openings is not larger than a predicted value L of the supply distance of hot air, L meets the following formula: L=1.50939-2.89306h+41.4135d+4.79476upsilon-0.960258delta-T-75.9297d<2>-0.585137upsilon<2>, in the formula, h is the heights of the air supply openings, and the unit is m; upsilon is air supply speed, and the unit is m / s; d is the hydraulic diameters of the air supply openings, and the unit is m; delta-T is the air supply temperature difference, and the unit is DEC G. Many factors influence the impacting jet hot air heating air supply distance, and a dead circulating process is prone to entering in due to parameter selection range and direction mistakes in design. According to the optimized design method, the phenomena that the hot air cannot reach a personnel working area or the blowing feeling of personnel is too strong due to the over-small or overlarge air supply distance caused by blind design can be avoided; meanwhile, the usage defects that displacement ventilation cannot be used for heating and the hot air is not likely to be supplied to personnel space through the above air supply mode are overcome, and the energy-saving requirement of an air conditioner air supply system is achieved simultaneously.

Description

technical field [0001] The invention relates to an optimal design method for a collision jet ventilation system. Background technique [0002] my country's air conditioning system consumes a lot of energy. The contradiction between air supply energy utilization rate of the air conditioning system and human thermal comfort and air quality requirements in large spaces is more acute than in small spaces, whether new ventilation methods such as displacement ventilation are adopted, or layered air conditioning improved on the basis of traditional mixed ventilation , did not solve this problem well. [0003] Displacement ventilation (floor air supply including low-speed air supply) and other terminal air supply methods are used for cooling in a large space. The air sent in at a low speed forms a cold air lake on the ground, and the hot plumes generated by people and other indoor heat sources are used to entrain the surroundings. cold air. That is, the goals of energy saving and...

AI Technical Summary

Problems solved by technology

[0009] The hot air delivery distance of the collision jet tuyere attached to the column is affected by many factors such as the temperature difference of the air supply, the air supply speed, the area of ​​the air supply outlet, and the height of the air supply outlet. It will be difficult to determine and design each factor separately. get the best design

This has become an obstacle to the further popularization and application of this new type of air-conditioning air supply mode.

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