A thermal-calorimetric gas flow meter with improved isolating feature

Yaghmourali, Yousef Valizadeh; Ahmadi, Nima; Abbaspour-Sani, Ebrahim

doi:10.1007/s00542-016-2915-2

Cited by 22 publications

(8 citation statements)

References 27 publications

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“…Different types of flow meters operate based on their own measuring principles. For example, the calorimetric flow meters use the physical effects that amount of flows are capable of absorbing different amounts of heat from a heat source on a measuring tip [2,3]. In the vortex flow meters, piezoelectric or capacitancetype sensors are implemented to detect pressure oscillation due to vortices of fluids around a bluff body [4].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Novel Liquid Flow Measurement by Using Thermoelectric Module

Oncha-ek,

Prasongsil,

Saitong

et al. 2023

J. Phys.: Conf. Ser.

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This paper presents an experimental investigation of liquid flow measurement by using a thermoelectric module. The measuring principle is based on the Seebeck effect of the thermoelectric module and the energy balance of convective heat transfer between the liquid flow and the thermoelectric module during implementation. The experimental studies confirm the viability of the thermoelectric module in determining the flow rates of water. In experiments, the results show that the determined flow rates by using the thermoelectric module are close to the actual flow rates of water with a coefficient of determination R2 of 0.9965. In addition to the straightforward measuring principle, low-cost material, no limitation of fluid types as well as directions of flows in a pipe, and no requirement of electrical power source make the thermoelectric module noteworthy as a sensor material in developing liquid flow meters.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Novel Liquid Flow Measurement by Using Thermoelectric Module

Oncha-ek,

Prasongsil,

Saitong

et al. 2023

J. Phys.: Conf. Ser.

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“…Recently, the investigation of two-phase flow by numerical methods was developed with the improved multiphase flow model and affordable computing power. The CFD techniques can provide detailed spatial and temporal distributions of various parameters [6][7][8]. The numerical methods for two-phase flow can be divided into two branches according to whether the interface between immiscible fluids is tracked or not.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Effect of the Rolling Motion on the Subcooled Flow Boiling in the Subchannel

et al. 2022

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The marine environment may change the force on the fluid and inevitably influence bubble behavior and the two-phase flow in the reactor core, which are vital to the safety margin of a nuclear reactor. To explore the effect of the marine motion on the flow and heat transfer features of subcooled flow boiling in the reactor core, the volume of fluid (VOF) method is employed to reveal the interaction between the interface structure and two-phase flow in the subchannel under rolling motion. The variations of several physical parameters are obtained, including the transverse flow, the vapor volume fraction, the vapor adhesion ratio, and the phase distribution of boiling two-phase flow with time. Sensitivity analyses of the amplitude and the period of the rolling motion were performed to demonstrate the mechanisms of the influence of the rolling motion. We found that the transverse flow in the subchannel was mainly affected by the Euler force under the rolling motion. In contrast to the two-phase flow in the static state, the vapor volume fraction and vapor adhesion ratio show different characteristics under rolling motion. Additionally, the onset of significant void (OSV) point changes periodically under rolling motion.

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“…However, it was found that the maximum measurable flow velocity was only 0.5 m/s beyond which signal saturation occurred, as such, they did not meet the requirements for implementation into HVAC systems where velocities can reach up to 10 m/s. Most of the current literature on the development of calorimetric sensors for low-velocity flow has focused on milli and micro scale (10 mm to 10 µm), however, it has been indicated that sensors of this size have a limited measurement range due to the globalised cooling effect experienced at higher flow rates [7], Although, existing studies have illustrated the feasibility of calorimetric flow sensors for the measurement of low-speed flows [5], the implementation of a larger scale sensor cable of measuring flow rates consistent with that found in HVAC systems (1-10 m/s) has yet to be presented in the literature. Hence, this study details the design, calibration, and testing of an experimental calorimetric flow sensor intended for use in HVAC systems.…”

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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A thermal-calorimetric gas flow meter with improved isolating feature

Cited by 22 publications

References 27 publications

Experimental Investigation of Novel Liquid Flow Measurement by Using Thermoelectric Module

Experimental Investigation of Novel Liquid Flow Measurement by Using Thermoelectric Module

Numerical Study of the Effect of the Rolling Motion on the Subcooled Flow Boiling in the Subchannel

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

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