Validity Guarantee of Measurement Data in Application of Big-diameter Heat-meter in China’s Heating System |
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| Jiguang ZHU, Huizhe CAO |
- Abstract:
- There are many limitations for the accuracy assurance technology of large-diameter heat meters characterized by laboratory calibration mode, which is hard to adapt to the complicated situation of heating system in China. Aiming to improve the measurement data accuracy of heating system thermal quantity, this paper proposes a new technical method by installing elbow sensor in the natural heating pipe bend to obtain the exact measure reference value. The method is based on the studies of current quality control conditions of big-diameter heat-meters, the flow measuring capability of heat-meters inside the hot water pipeline, the demand of heating operation to flow measurement accuracy, the online-verification technical model of flow measure, and the comparison between external clamp-on ultrasonic heat-meter and elbow heat-meter measurement ability under the situation of heating operation. The measurement data show that the elbow sensor of heat-meter prepared by the industrial ordinary elbow has the accuracy level of 3 % and the long-term stability can reach 0.3 %. Compared with the clamp-on ultrasonic flowmeter, the elbow sensor can better provide a stable measurement reference value at the heating site.
- Keywords:
- Heat-meter; Big-diameter; Online-verification; Elbow sensor; Clamp-on ultrasonic flowmeter; Reference value
- Download:
- IMEKO-TC9-2019-148.pdf
- DOI:
- 10.21014/tc9-2022.148
- Event details
- IMEKO TC:
- TC9
- Event name:
- FLOMEKO 2022
- Title:
19th International Flow Measurement Conference 2022
- Place:
- Chongqing, CHINA
- Time:
- 01 November 2022 - 04 November 2022