Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Using the Torque Characteristics of Dampers to Measure Airflow, Part II: Analysis and Testing
This paper describes the analysis and testing of a method of measuring airflow from position and torque (APT) measurements of dampers. The method is based on a newly developed mathematical model of the aerodynamic torque characteristics of dampers. An uncertainty analysis demonstrates that the APT method can outperform a pitot tube over a wide range of conditions, but that it cannot outperform a pitot tube when the damper is nearly open. Tests on an offset-blade damper and a commercially available airflow station confirm the results of the uncertainty analysis and demonstrate that the APT technology is also insensitive to upstream airflow disturbances when the damper is less than 70% open.
Using the Torque Characteristics of Dampers to Measure Airflow, Part II: Analysis and Testing
This paper describes the analysis and testing of a method of measuring airflow from position and torque (APT) measurements of dampers. The method is based on a newly developed mathematical model of the aerodynamic torque characteristics of dampers. An uncertainty analysis demonstrates that the APT method can outperform a pitot tube over a wide range of conditions, but that it cannot outperform a pitot tube when the damper is nearly open. Tests on an offset-blade damper and a commercially available airflow station confirm the results of the uncertainty analysis and demonstrate that the APT technology is also insensitive to upstream airflow disturbances when the damper is less than 70% open.
Using the Torque Characteristics of Dampers to Measure Airflow, Part II: Analysis and Testing
Federspiel, Clifford (Autor:in)
HVAC&R Research ; 10 ; 65-72
01.01.2004
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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