Proceedings | |
Thermal Flow Sensor for NonâInvasive Measurements in HVAC Systems | |
Glatzl, Thomas1  Cerimovic, Samir2  Treytl, Albert3  Beigelbeck, Roman4  | |
[1] Author to whom correspondence should be addressed.;Department for Integrated Sensor Systems, Danube University Krems, Aâ2700 Wiener Neustadt, Austria;Institute of Sensor and Actuator Systems, Vienna University of Technology, Aâ1040 Vienna, Austria;Presented at the Eurosensors 2018 Conference, Graz, Austria, 9â12 September 2018 | |
关键词: thermal flow sensor; nonâinvasive flow rate measurement; HVAC systems; | |
DOI : 10.3390/proceedings2130827 | |
学科分类:社会科学、人文和艺术(综合) | |
来源: mdpi | |
【 摘 要 】
We present a feasibility study on nonâinvasive flow rate measurements in heating, ventilation, and air conditioning (HVAC) systems utilizing thermal transduction instead of commonly used ultrasonic techniques. The investigated thermal flow transduction comprises two temperature sensors and a heater, all mounted nonâinvasively on the outer pipe surface and, therefore, not disturbing the fluid flow inside. One temperature sensor measures the heater temperature, whereas the other one, mounted upstream of the heater, follows the fluid temperature for reference. The temperature difference (i.e., the heater excess temperature) depends on the fluid velocity and can be used to derive the mean volume flow inside the pipe. In order to visualize and study the temperature field, a finite element method (FEM) model of the system was implemented. Measurements conducted with the sensor prototype confirm the feasibility of this approach.
【 授权许可】
CC BY
【 预 览 】
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RO201910255300741ZK.pdf | 651KB | download |