The location of temperature sensors in pipe flows for determining the mean gas temperature in flow metering applications

Kolpatzik, S. J.; Hilgenstock, A.; Dietrich, H.; Nath, B.

doi:10.1016/s0955-5986(98)00009-0

Cited by 4 publications

(1 citation statement)

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“…Furthermore, the immersion length should not exceed 3/4 of the nominal pipe diameter; if it does, a 45° installation or an internal pipe bend is be preferred. Additionally, [ 13 ] investigates the optimal location of temperature sensors in pipe flows that are used to determine the gas temperature in flow metering applications. The thermowell is normally mounted orthogonally to the flow to maximize the convective heat exchange.…”

Section: Introductionmentioning

confidence: 99%

On the Reliability of Temperature Measurements in Natural Gas Pipelines

Ficco

Cassano

Cortellessa

et al. 2023

Sensors

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Accuracy of temperature measurement of natural gas flows in closed conduits is a highly debated topic due to the complexity of the measurement chain and the related economic impact. First, specific thermo-fluid dynamic issues occur because of the difference between the temperature of the gas stream and that of the external ambient and the mean radiant temperature inside the pipe. Furthermore, the installation conditions of the temperature sensor (e.g., immersion length and diameter of the thermowell) play a crucial role. In this paper, the authors present the results of a numerical and experimental study conducted both in the laboratory and in-field aimed at analyzing the reliability of temperature measurement in natural gas networks as a function of the pipe temperature and of the pressure and velocity of the gas stream. The results obtained in the laboratory show errors ranging between 0.16 and 5.87 °C in the summer regime and between −0.11 and −2.72 °C in the winter regime, depending on the external pipe temperature and gas velocity. These errors have been found to be consistent with those measured in-field, where high correlation between the pipe temperatures, the gas stream and the external ambient have been also demonstrated, especially in summer conditions.

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Section: Introductionmentioning

confidence: 99%