WATERGY Software
WATERGY version 3.0 (Excel files in self-extracting archive for PCs only)
Updated August 2000
WATERGY Manual (PDF 229 KB, 14 pp) Download Adobe Reader.
WATERGY is a spreadsheet model that uses water/energy relationship assumptions to analyze the potential of water savings and associated energy savings. The spreadsheet allows input of utility data (energy and water cost and consumption data for the most recent twelve months) and facility data (number and kind of water consuming/moving devices and their water consumption and/or flow rates). It then estimates direct water, direct energy, and indirect energy annual savings, as well as total cost and payback times for a number of conservation methods.
Most of the assumptions that WATERGY uses for energy/water calculations can be grouped into the following categories: the heating values of fuels (e.g., the heating value of natural gas in Btu/cf); the efficiencies of energy and water consuming devices or processes (e.g., number of kilowatt hours consumed per gallon for electric hot water heaters, or number of kilowatt hours consumed per 1000 gallons of treated waste water); time-of-use for fixtures (e.g., number of minutes per use of infra-red sensor faucets); and percentage of hot water use in machines or fixtures (e.g., percentage of water usage that is hot water for a typical faucet).
WATERGY also makes simple assumptions about capital and labor costs of equipment and fixture replacements. All assumptions WATERGY uses can be modified by the user.
At this time, WATERGY estimates potential conservation opportunities for the following methods:
- Installation of 1.6 gal/flush toilets and water conserving urinals
- Installation of automatic faucets
- Installation of faucet aerators
- Low flow showerhead
- Boiler blowdown optimization
- Efficient dishwashers
- Efficient washing machines
- Landscape irrigation optimization