Water flow calculation

1, the cooling water flow: generally according to the product sample to provide numerical selection, or in accordance with the following formula for the calculation, the formula Q for the cooling host cooling capacity

 L (m3 / h) = [Q (kW) / (4.5 to 5) ° C x1.163] X (1.15 to 1.2)

2, chilled water flow: in the absence of consideration at the same time the use of the selected units, according to the sample provided by the product selection or according to the following formula to calculate. If you consider the simultaneous use rate, it is recommended to use the following formula to calculate. The Q in the formula is the total cooling load in the case where the building does not take into account the simultaneous utilization rate.

  L (m3 / h) = Q (kW) / (4.5 to 5) ° C x1.163

3, the cooling water is generally 1 for the cooling water circulation of water 1 to 1.6%.

Determination of wind speed

(1) Wind speed inside the duct The air-conditioned room is controlled between 40 and 50 dB (A) for the air-conditioning system, that is, the corresponding NR (or NC) number is 35 to 45 dB (A). According to the design specifications, to meet this range of noise allowable value of the main wind speed of 4 ~ 7m / s, branch pipe wind speed of 2 ~ 3m / s. Ventilator and silencer between the duct, the wind speed can be used 8 ~ 10m / s.

(2) outlet wind speed to prevent the outlet noise, the outlet of the wind speed should adopt 2 ~ 5m / s.

(3) When the air outlet of the return air outlet is located in the upper part of the room, the suction speed is 4 ~ 5m / s. When the air outlet is located in the lower part of the room, if it is not close to the place where the staff often stay, take 3 ~ 4m / s. Close to the staff often stay in the place, take 1.5 ~ 2m / s, if the corridor for the wind, take 1 ~ 1.5m / s