| 摘要 |
The total throttling for the throttle and air valve is calculated from the required total pressure drop and air quantity as a throttling constants. - k(t)=Pt/Q2 - in which Pt = the required total pressure drop and Q = the required air quantity. The k-value for throttling in the air valve ks is calculated as the difference ks = kt - k1, where k1 is the known value for the throttle device. The momentary k-value ksm in the air valve is determined by reading off the pressure drops: deltap12=pressure drop over the throttle, delta p23 = the pressure drop over the air valve, and is calculated in accordance with - k(sm)=K(t)/(delta p12/delta p23 + 1) - The momentary k-value for the air valve/damper k(sm) is compared with k(s), whereby the differences between the k-values indicates the extent and direction of the pre-adjustment of the air valve. |
