Field verification of thermal energy meters through ultrasonic clamp-on master meters

Ficco, Giorgio; Frattolillo, Andrea; Malengo, Andrea; Puglisi, Giovanni; Saba, Fabio; Zuena, F.

doi:10.1016/j.measurement.2019.107152

Cited by 8 publications

(5 citation statements)

References 9 publications

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“…[19] calibrated a water flow meter using the master meter method, achieving a measurement uncertainty of as low as 0.20%. [20] performed field test of a thermal energy meter using an ultrasonic clamp-on flow meter. The results showed significant uncertainties in the measurement of flow, with values ranging from 1.3% to 1.9% at flow velocities of 1.0 m/s and 0.3 m/s, respectively.…”

Section: Introductionmentioning

confidence: 99%

Design of a Flow Automatic Calibration System Based on the Master Meter and Dynamic Weighing Methods

Zhai,

Song,

Wang

et al. 2024

IEEE Access

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Flow measurement technology is an important part of metrology, in which the flow calibration facility used to measure the accuracy of water meters has become the research focus of most institutes of metrology. In order to solve the problem of measurement error of ultrasonic water meter due to various interfering factors in the flow calibration process, this paper designs a set of ultrasonic water meter flow calibration system with high degree of automation and intelligence. Firstly, by analyzing and studying the working principle of the water flow calibration device, and according to the actual flow calibration range, the calibration method combining the master meter method and the dynamic weighing method is determined. And then, in order to improve the automation degree of the flow calibration system, the flow calibration control algorithm is analyzed and designed in detail. The algorithms include the overall control algorithm, the control algorithm of the master meter method and the control algorithm of the dynamic weighing method. Finally, a flow correction algorithm based on linear interpolation was designed and calibrated using this algorithm. Test data show that after the flow correction ultrasonic water meter value error in the "high area" are not more than 2%, in the "low area" is not more than 3%, and the repeatability is less than 0.05%. Compared with manual calibration, the flow calibration system designed in this paper realizes the highprecision automated flow calibration of ultrasonic water meters, which greatly improves the detection efficiency and accuracy.

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Section: Introductionmentioning

confidence: 99%

Design of a Flow Automatic Calibration System Based on the Master Meter and Dynamic Weighing Methods

Zhai,

Song,

Wang

et al. 2024

IEEE Access

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“…The applicability of one technique over the other is related to the type of emission/distribution system and to the economic feasibility of the intervention. The scientific literature regarding heat metering and sub-metering system is quite rich [3], accounting for several issues such as metrological performances [4,5], energy efficiency [6,7], technical-economic feasibility [7], cost allocation [8] On the other hand, the existing literature on cooling energy metering is almost lacking. This may be due to the limited spread of metering and sub-metering infrastructures both in district cooling networks [2] and in Centralized Cooling Systems (CCS), compared to the heating ones.…”

Section: Introductionmentioning

confidence: 99%

Individual metering and submetering for cooling application

Aprea¹,

Canale²,

Dell’Isola³

et al. 2023

Proceedings of the 19th International Flow Measurement Conference 2022 on Flow Measurement - FLOMEKO 2022

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In 2012 the Energy Efficiency Directive (EED) has set mandatory installation of individual metering and submetering systems for accounting thermal energy consumption in buildings where centralized heating/cooling sources are present, when technically feasible and cost efficient. As a consequence, direct thermal energy meters or indirect heat accounting systems have spread widely in residential buildings, for metering and submetering in space heating applications. On the other hand, individual metering of thermal energy in space cooling is a difficult task, due to the very different types of cooling systems and to the lack of technical and legal metrology regulation. In this paper possible solutions available for direct metering and submetering of different types of centralized cooling systems are discussed. Indeed, for direct metering application, the cooling fluid flow metering is a particularly crucial issue due to small pipe diameters and different fluid properties. Thus, the authors carried out an experimental comparison between a Coriolis flow-meter and an ultrasonic clamp-on flowmeter in the cooling fluid circuit of a direct expansion system. Tests have been performed at different operative temperature differences between flow and return, showing relative errors within ± 10%.

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“…In [8] the authors designed and developed an experimental campaign aimed at investigating the metrological issues related to the use of US clampon flow sensor as reference meters during in field verification of TEMs. It has been demonstrated the clamp-on transducer installation (vertical/horizontal, straight pipes, etc.)…”

Section: Introductionmentioning

confidence: 99%

Metrological and operational issues during subsequent verification of thermal energy meters

Ficco¹,

Canale²,

Dell’Isola³

et al. 2023

Proceedings of the 19th International Flow Measurement Conference 2022 on Flow Measurement - FLOMEKO 2022

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Individual metering for heating and cooling application has been recognized as an effective tool to improve energy efficiency in buildings in EU. Hence, thermal energy meters are widely spreading in district heating networks and in buildings served by a central heating/cooling source. By a legal metrology point of view, while type approval and initial verification of thermal energy meters are regulated by MID and harmonized standards EN 1434, no technical common procedure is still available in EU for subsequent verifications both in laboratory and on the field and member states are tackling this issue with different approaches. Nevertheless, the verification of thermal energy meters is a difficult task, due to the complex measuring chain and to the need to set appropriate verification points combined in flow-rate and temperature difference values. In this paper, the authors present the results of an experimental campaign aimed at analysing the key metrological issues and the compatibility between the results of subsequent verification of a thermal energy meter performed in the laboratory and on the field.

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Field verification of thermal energy meters through ultrasonic clamp-on master meters

Cited by 8 publications

References 9 publications

Design of a Flow Automatic Calibration System Based on the Master Meter and Dynamic Weighing Methods

Design of a Flow Automatic Calibration System Based on the Master Meter and Dynamic Weighing Methods

Individual metering and submetering for cooling application

Metrological and operational issues during subsequent verification of thermal energy meters

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