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This paper is focused on the mathematical model of the Air Torque Position   dampers. The mathematical model establishes a link between the velocity of   air in front of the damper, position of the damper blade and the moment   acting on the blade caused by the air flow. This research aims to   experimentally verify the mathematical model for the damper type with   non-cascading blades. Four different types of dampers with non-cascading   blades were considered: single blade dampers, dampers with two cross-blades,   dampers with two parallel blades and dampers with two blades of which one is   a fixed blade in the horizontal position. The case of a damper with a   straight pipeline positioned in front of and behind the damper was taken in   consideration. Calibration and verification of the mathematical model was   conducted experimentally. The experiment was conducted on the laboratory   facility for testing dampers used for regulation of the air flow rate in   heating, ventilation and air conditioning systems. The design and setup of   the laboratory facility, as well as construction, adjustment and calibration   of the laboratory damper are presented in this paper. The mathematical model   was calibrated by using one set of data, while the verification of the   mathematical model was conducted by using the second set of data. The   mathematical model was successfully validated and it can be used for   accurate measurement of the air velocity on dampers with non-cascading   blades under different operating conditions. [Projekat Ministarstva nauke   Republike Srbije, br. TR31058

Experimental calibration of the mathematical model of Air Torque Position dampers with non-cascading blades