|
|
|
|
View Cost Savings Video
|
The Metlund DMAND Benefits - Cost Savings |
| If each home saved only 20 gallons of water each day, or 7,300 gallons per year, then in one year the impacts would be... |
| For the Homeowners |
| 7,300 |
Gallons of water saved |
|
$ 151
$ 175
$ 242 |
Saved (including natural gas for water heating, water, and sewer) or
Saved (including propane for water heating, water, and sewer) or
Saved (including electricity for water heating, water, and sewer) |
| |
| For the Water Utilities |
| |
Water Delivery |
|
7,300 |
Gallons of water not pumped, treated and supplied to the homes |
|
7 |
Kilowatt-hours of electricity saved |
|
$ 1 |
Saved for energy |
|
$ 0.006 |
Saved for chemicals |
| |
| |
Wastewater Treatment |
|
7,300 |
Gallons of wastewater not removed from the homes, treated and returned to the environment |
|
16 |
Kilowatt-hours of electricity saved
|
|
2 |
Saved for energy |
|
$0.219 |
Saved for chemicals |
| |
| For the Electric Utilities |
|
1,689 |
Kilowatt-hours of electricity saved |
|
1 |
Tons of Carbon Dioxide emissions avoided |
|
0.074 |
Tons of Nitrogen Oxides avoided |
| |
| For the Natural Gas Utilities |
|
78 |
Therms of natural gas saved |
|
1 |
Tons of Carbon Dioxide emissions avoided |
|
0.002 |
Tons of Nitrogen Oxides avoided |
| The data on this table is based on the assumptions below: |
|
Assumptions
|
| |
Low |
High |
Average |
| Cold Water Temperature (F) |
Ground Water or Delivered to House
(Round to nearest number in chart) |
40 |
60 |
50 |
| |
| Hot Water Temperature (F) |
120 |
160 |
140 |
At Water Heater
(Round to nearest number in chart) |
| Btu/Gallon |
| Smallest Temperature Difference |
500 |
(Low Hot, High Cold) |
(Low Cold, High Hot) |
| Largest Temperature Difference |
1,000 |
(Average Cold, Average Hot) |
(Low Cold, High Hot) |
| Average Temperature Difference |
750 |
|
(Average Cold, Average Hot) |
| |
| Energy Costs |
Natural Gas |
Propane |
Electricity |
Cost
($/therm, $/kWh, $/gallon) |
$ 1 |
$ 1.20 |
$ 0.10 |
Energy Content
(1Th = 100,000 Btu)
(1 kWh = 3412 Btu)
(1 Gal = 91,547 Btu) |
100 000 |
91,547 |
$0.10
|
| Water Heater Efficiency |
0.7 |
0.7 |
0.95 |
| |
Water Costs
($/1000 gallons)
(748 gallons = 1 CCF) |
$ 5 |
Sewer Costs
($/1000 gallons)
(748 gallons = 1 CCF)
|
$ 5 |
| |
| Water Delivery System |
| Energy Savings |
0.00091 |
kWh per gallon |
| |
$0.0000910 |
Per gallon |
| Chemical Savings |
$0.0000008 |
Per gallon |
| |
| Wastewater Treatment System |
| Energy Savings |
0.002157 |
kWh per gallon |
| |
$0.00003 |
Per gallon |
| Chemical Savings |
$0.00022 |
|
| |
| The energy savings are based on the Average Temperature Difference. Energy and chemical savings for water delivery and wastewater treatment are based on the Sacramento area. |
|
|
|
|
|
|
|
