Laserfiche WebLink
Client Name: City of Santa Ana I AMI FEASIBILITY REPORT <br />Figure 13 Sample Residential Usage Graph without Customer Side Leakage <br />160 <br />140 <br />120 <br />° 300 <br />u 80 <br />60 <br />40 <br />20 <br />0 <br />Residential Customer - With Leak <br />â– Leakage ®Usage <br />1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 <br />Hours <br />Figure 14 Sample Residential Usage Graph with Customer Side Leakage <br />The potential leak is detected with an algorithm that is always analyzing the interval usage of all <br />customers every day and looking for instances where residential customers have no periods of zero <br />use. This may have an effect on the overall consumption and the amount billed in time, as these <br />meters cause more customers to fix leaks faster. <br />9.2.2 Supply Side Services <br />Properly configured water distribution networks can provide AMI systems with significant extra <br />benefits with respect to supply-side auditing and leakage reduction. These are not out-of-the-box <br />tools, but they can provide significant enhancements to the network efficiency and understanding. <br />Most AMI projects being developed consider leakage detection, but only on the customer side. The <br />water meters and their associated MTU will record whether there is continuous use by the <br />customer over a 24 hour period. If there is, then a leak signal will be sent by the unit to recommend <br />further review. <br />With respect to the City, it is recommended that supply-side leakage control system be <br />implemented. There are three main areas where the AMI system provides value: <br />1. To more accurately audit the system for water demand. <br />2. To detect supply-side leakage. <br />a. To target water leakage reduction through measurement on zonal areas. <br />b. To conduct water leakage detection with leakage loggers. <br />3. To improve understanding water meter accuracies. <br />Each of these items needs extra infrastructure to effectively implement the program. For example, <br />all the items will require a specialization for the MDMS to handle, scrub, and analyze the relevant <br />data. There are currently no off-the-shelf software packages that provide the full spectrum of this <br />analysis, but they are being developed, and it is expected that fully -functioning packages (validated <br />BLACK & VEATCH I Additional Benefit Areas <br />25G-159 <br />41 <br />