Thermal flow sensor used for thermal mass flowmeter

Bekraoui, Amina; Hadjadj, Ahmed

doi:10.1016/j.mejo.2020.104871

Cited by 23 publications

(6 citation statements)

References 12 publications

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“…The thermal style gas flow sensors have been widely studied and applied due to their simple structure with no moving parts, and mature processing technology [2][3][4] . Some foreign research institutions and technology companies have conducted extensive research on the thermal style gas flow sensors, and many sensors using different processing techniques and materials have been proposed [5][6][7][8][9][10] . In addition, there is also in-depth research on the measurement accuracy of the thermal style gas flow sensors, such as temperature and humidity compensation, sensitivity, stability, signal processing, etc.…”

Section: Introductionmentioning

confidence: 99%

Research on a natural gas flow sensor based on MEMS technology

Zhou¹,

Sun²,

Zheng

et al. 2023

Second International Conference on Advanced Manufacturing Technology and Manufacturing Systems (ICAMTMS 2023)

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The primary task of establishing an intelligent energy network is to achieve the intelligent measurement of energy sources such as water, electricity, and natural gas, etc. Among them, significant progress has been made in the intelligent measurement of electricity and water, but the intelligent measurement of natural gas is still an urgent technical problem to be solved. At present, the actually used gas flow meters in the market are still traditional mechanical gas meters, which require manually recording gas meter data in each household. The data cannot be connected to the internet and cannot collect instantaneous flow values in real time, which is not conducive to real-time peak shaving of the energy network and compatibility with national intelligent energy network projects. The MEMS gas flow sensor studied in this article has the advantages of small size, light weight, low power consumption, high reliability, high sensitivity, and easy integration, which is a highly promising technical means to solve the intelligent measurement of natural gas.

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Section: Introductionmentioning

confidence: 99%

Research on a natural gas flow sensor based on MEMS technology

Zhou¹,

Sun²,

Zheng

et al. 2023

Second International Conference on Advanced Manufacturing Technology and Manufacturing Systems (ICAMTMS 2023)

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“…These sensors are significantly more accurate than volumetric based sensors as they eliminate inaccuracies resulting from changes in fluidic properties as mass is not temperature and pressure dependant. Mass flow sensors operating through thermal principles are of particular interest in HVAC applications [5] as they provide highly accurate measurements at low flow rates (like those found within HVAC ducting), are capable of wide linear measurement ranges, yield minimal flow restriction, and have an absence of moving parts [6].…”

Section: Introductionmentioning

confidence: 99%

“…The three most common types are thermal dispersion, thermal pulse, and calorimetric. Thermal dispersion sensors utilise Newton's law of cooling to determine mass flow rate by means of quantifying the thermal energy dissipated by convection from a heated element to a surrounding fluid [6]. Generally, the heated element consists of a cylindrical wire or a flat film, through which a current is passed.…”

Section: Introductionmentioning

confidence: 99%

Development of a Thermal Mass Airflow Sensor for Low Velocity Ducted Flow Applications

Eoin¹,

Macken²,

Egan³

2022

Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering

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This study was conducted to develop a flat plate, calorimetric based, mass airflow sensor capable of measuring low-speed flow typically found in heating, ventilation, and air conditioning (HVAC) systems. Moreover, to develop a numerical model that accurately predicts the fluidic and thermal behaviour of the sensor design. Current findings indicate that the numerical and experimental results were in close agreement, with the predicted leading-edge temperatures within 1-2% of those recorded experimentally. However, this error increased in the trailing edge to a maximum of 8%; inclusion of the trailing edge flap within the numerical model reduced this to less than 3%, suggesting that the flap generates enhanced cooling within the trailing region. The temperature deltas predicted by the numerical model were on average twice that of the experimental values, however, the average temperature change was still less than 0.03°C per 1 m/s increase in velocity. It was concluded that the copper sensor design was unsuitable for mass flow measurement. The numerical findings for the stainless-steel sensor indicate a 600% increase in the maximum temperature delta measured from 0.069°C to 0.49°C. Which suggests the subsequent increase in accuracy is a result of the decreased thermal diffusivity of stainless-steel, which is 96% lower than that of copper. Other findings include, a further increase in temperature delta values when the heater size is decreased, resulting in a maximum temperature delta value of 0.58°C and an average change of 0.49°C for a 1 m/s change in flow velocity. Thus, it can be implied that the modified calorimetric airflow sensor would accurately predict the mass flow rates within HVAC ducting systems.

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“…However, due to its complex structure and high cost, this method is difficult to be widely promoted. Therefore, constant power method [9] of thermal flowmeter [10] is considered to be used for measurement.…”

Section: Introductionmentioning

confidence: 99%

Research on small flow detection method based on constant power method

Qin

Dang

2022

Eng. Res. Express

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In the field of three phase flow testing, real-time and online wellhead production detection has become an indispensable trend for evaluating well production and well condition. At present, the production of most conventional oil fields in China is low, and there are many Wells with less than 10 m3/d . It is difficult to detect the flow of low-flow Wells with conventional metering methods. Therefore, this paper proposes to use thermal flowmeter temperature difference method to measure the flow value. First, COMSOL Multiphysics 5.6 software was used to build the model of the thermal flow meter and set the size of the temperature probe, heating probe and velocity probe. Secondly, relevant parameters are set to simulate two steady state forms with different water content and different flow rate. Finally, the temperature changes of the velocity probe are simulated under the two conditions. The simulation results show that when the water content is the same and the flow velocity is between 0.0059m/s and 0.059m/s, the temperature of the probe decreases with the flow velocity increasing, and the temperature of the probe increases with the flow velocity decreasing. At the same flow rate and water content between 0% and 100%, the higher the water content, the lower the temperature of the speed-measuring probe, and the smaller the water content, the higher the temperature of the speed-measuring probe. The simulation results show that thermal flowmeter can be competent for flow detection of low production fluid and low flow well, which provides the basis for the detection method of low production fluid in the future and lays the foundation for the design of thermal flowmeter.

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Thermal flow sensor used for thermal mass flowmeter

Cited by 23 publications

References 12 publications

Research on a natural gas flow sensor based on MEMS technology

Research on a natural gas flow sensor based on MEMS technology

Development of a Thermal Mass Airflow Sensor for Low Velocity Ducted Flow Applications

Research on small flow detection method based on constant power method

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