نوع مقاله : مقاله پژوهشی
موضوعات
عنوان مقاله English
نویسندگان English
The quantity and quality of customer meters, as measuring instruments of water sales, are important for water and wastewater companies and their customers. In this study, the performance of customer meters and the amount of their measurement error are comprehensively examined. While evaluating the accuracy of the meters, the effect of key parameters on the accuracy of the meters is investigated. For this purpose, 702 meter tests were performed at the customers level of 3 reservoirs. Customer meters of different models and diameters were randomly selected. Tests were performed at 5 different flow rates from the startup flow rate to the maximum flow rate that can be withdrawn from the subscription. The effects of parameters such as meter diameter, meter age, meter operating rate, pressure, and startup flow rate at the 5 tested flow rates were evaluated. A reference meter was used to compare the accuracy of meters at different flow rates. For each meter, a data set was created and a statistical analysis was performed by measuring the pressure at the measurement site and calculating the accuracy of the meter at different flow rates in comparison with the reference meter. The results show that 17% of the meters have an error in the range of ±2%, 57% in the range of ±5%, and 6% of the meters are completely damaged. The error rate of the meter depends on the meter model and its manufacturer, so that 7 different meter models have shown completely different error ranges. Additionally, linear correlations between the error at different test flow rates and the parameters under study confirm the effect of these parameters on the error rate. Finally, recommendations are provided to water network management officials for optimal management of customer meters based on the analyses performed.
کلیدواژهها English
