Project Appreciation and Objectives
Too often meters are simply sized to match with the bore of pipe in which they are being installed rather than by consideration of the flows that they are intended to measure. The practical upshot of this is that many meters are effectively too large to give optimum performance in a particular application. Oversized meters, operating at the lower end of their flow range, are likely to under-register which, for revenue meters, can lead to significant loss of income. In addition, incorrectly sized meters, can lead to misleading data on consumption, for example, when analysing night flows and leakage. Occasionally meters are also under-sized; this can result in high wear rates, leading to premature failure and, again, lost revenue.
This project will develop a meter right sizing tool that will enable the optimum sized meter to be identified for each application. The tool will determine the most appropriate size for a meter from the anticipated flow-rates and will also take account of factors such as:
- pressure (head) losses;
- tariff (both standing and volumetric charges);
- physical and installation constraints (including supply size);
- cost of meter and installation.
The spreadsheet based tool will include all common sizes and specifications of meters. It will enable the user to balance the sometimes conflicting objectives of optimum data quality, lowest cost and maximum revenue recovery where a number of options are available. A key objective will be to keep the tool very user friendly and easy to use.
Benefits to Clients
- Improved revenue from commercial meters.
- More robust consumption data for use in water balance calculations.
- Agree specification and end-users with the Liaison Group
- Develop the methodology and basic model, including defining input and output requirements and building the supporting data sets.
- Demonstrate a prototype model for assessment by the project participants.
- Further refine and develop the model based on liaison group feedback.
- Test and validate model.
- Finalise and issue model.
- Workshop and final dissemination meeting to which participants would be encouraged to bring prospective users.
- Meter right sizing Excel spreadsheet tool.
- User documentation explaining basis of model and giving user instructions.
- Training in the use of the meter right sizing tool
Related WRc Work
- Under-Registration of Commercial Meters, CP360, 2008-2010.
- Long Term Performance of Domestic Meters, CP324, 2007-2008.
- Carbon Accounting Methodology and spreadsheet tool, UKWIR, 2007; three revisions 2008-2010.