D.1 Energy Project Ranking
To assess the potential to make energy improvements, the following types of data should be collected on the assets. One set of data is from historical sources. The other set is based on field data collection. Appendix A contains an inventory sheet that can be used to collect energy data on assets. This worksheet also contains a column to calculate energy use of the asset.
Historical Data Collection for Energy Using Assets
- Minimum of 1 year of energy use data - existing accounting system, utility billing records, SCADA system records, O&M records, equipment/motor lists with horsepower and load information (Note: SCADA - add as many data loggers as possible at different phases of the process to determine if any of the equipment has large energy spikes)
- Understand energy rate structure - the price of energy and the energy rate structure affect energy costs
- Hydraulic loading data - flow data should be compared to energy use data.
- Utilize graphs to report the data.
- Equipment Name
- Nameplate horsepower
- Type of Energy Used
- Current Energy Use & data source - if available
- Current Energy Costs & data source - if available
- Operating status and practices
- Maintenance practices/history
- Engineering/design limitations, compare design specifications with actual performance
- Motor sizes
- Current drawn (amperage) - using a current meter if necessary
- Average equipment run times and hours of operation per year
- Measured power consumption
- Total kilowatt-hours (kWh) of electrical consumption per year
- Sub-metering system data if available
- Calculate: kWh/MG treated - benchmark
- Calculate: horsepower * 0.746 = kilowatts