這三種方法是通風(fēng)管道設(shè)計的主要方法

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1、壓損平均法

1, pressure loss average method

這一方法是以單位長度風(fēng)管具有相等的阻力為前提的。計算步驟是：將已知的總風(fēng)壓按干管長度平均分配給每一段管，再根據(jù)每一段管的風(fēng)量和分配到的風(fēng)壓確定風(fēng)管斷面尺寸。在官網(wǎng)系統(tǒng)所用的風(fēng)機風(fēng)壓已定時，采用等壓損法是比較方便的。對于大的通風(fēng)系統(tǒng)可利用壓損平均法進行支管的壓力平衡。

This method is based on the equal resistance of the unit length air duct. The calculation steps are: the total pressure known by dry tube length average assigned to each section of the tube, and then the section size is determined according to the pressure of each air duct pipe and air distribution to the. It is convenient to use the isobaric loss method when the wind pressure of the fan used in the official website system has been fixed. For large ventilation systems, the pressure loss averaging method can be used to balance the pressure of the branch pipe.

2、靜壓復(fù)得法

2, the static regain method

靜壓復(fù)得法利用風(fēng)管分支處復(fù)得的靜壓來客服該管段的阻力，根據(jù)這一原則確定風(fēng)管的段面尺寸。此法一般適用于高速空調(diào)系統(tǒng)的計算。

Static pressure regain method using duct branch return to service the pipe resistance, according to the principle of determining wind pipe section size. This method is generally applicable to the calculation of high speed air conditioning systems.

3、假定流速法

3. Assumed velocity method

該方法的特點是，先按技術(shù)經(jīng)濟要求來選定風(fēng)管的流速，仔根據(jù)風(fēng)管的風(fēng)量確定風(fēng)管的斷面尺寸和阻力，然后對各支路的壓力損失進行調(diào)整，使其平衡。這是目前常用的計算方法。

The feature of this method is that, according to the technical and economic requirements to the selected wind velocity, wind resistance and determine the section size of Aberdeen tube according to the air duct, and the pressure loss of each branch of the adjustment, the balance. This is the most commonly used method of calculation.

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