Is there any difference in calculating pressure between Durkeesox system and traditional air duct?
The pressure calculation of Durkeesox system is basically as same as traditional air duct, including all calculation formula. The friction coefficient of Durkeesox system is almost the same as traditional spiral duct, only when we calculate the pressure of Durkeesox system can we ignore friction loss along the duct, what we need to do is the calculation of local resistance. For the Durkeesox system, friction loss along the duct will decrease as the air velocity inside the duct is reducing, the total friction loss along the duct is almost equivalent to static pressure regain, the difference is small even it does exist, besides, the static pressure regain is often more than friction loss along the duct. Sometimes, we even use PAD (pressure adjust device) to balance off some dynamic pressure. In complex system, it is requested to calculate pressure loss when elbow and T-connections are available.