The cost savings calculation is based on lowered head losses as a result of the installation and use of ARI air valves on the system. The results were gathered from tests that were performed over a period of time that reflected the changing working conditions at the pump station. The use of the ARI Air Valves resulted in lowered head losses (h) measured in meters and was characteristic at all the pump stations that installed ARI Air Valves.
- Energy Savings measured during the first half of 2008 at specific pump stations using high-voltage pumps.
Energy savings in kWh for the first half of the year 2008 was calculated according to the formula:
h = measured head loss savings
Q = water volume 1000m³
0.7 = pump and motor efficiency
All calculations based on the rate of 0.7401 Rubles/kWh
N Station Q,
x1000m³h,(m)
Head loss savingEnergy
Saving, kWhCost Saving
Rubles1 Brateevskaya 8793.0 2.1 71,751 53,103 2 Vychinskaya 12020.0 2.1 98,083 72,591 3 Lyblenskaya 45394.0 5.3 934,857 691,888 4 Novo-Kuncevskaya 23737.0 6.0 553,411 409,579 5 Novo-Solncevskaya 26697.2 6.0 622,426 460,657 6 Ramenskaya 11383.0 2.1 92,885 68,744 7 Savinskaya 54386.0 2.4 507,188 357,370 8 Tushinskaya 31289.0 2.4 291,792 215,955 9 Filevskaya 104834.0 5.4 2,199,717 1,628,011 10 Chapilovskaya 100129.0 5.6 2,178,807 1,612,535 11 Centralnaya 38913.0 4.8 725,783 537,152 12 Tcherkizovskaya 94706.0 5.6 2,060,803 1,525,200 13 Yugo-Vostochnaya 66301.0 5.1 1,313,896 972,414 Total: 618582.2 11,651,399 8,623,199 - Cost Savings measured during the first half of 2008 at specific pump stations using low-voltage pumps.
Energy Savings in kWh for the first half of 2008 was measured according to the formula:
h = measured head loss savings
Q = water volume 1000m³
0.7 = pump and motor savings
All calculations based on the rate of 1.7738 Rubles/kWh
N
Station Q,
x1000m³h,(m)
Head loss savingEnergy
Savings.
kWhCost
Savings,
Rubles1 Losevskaya 4871.5 2.5 86,180 48,585 2 Marinskaya 6329.8 2.4 106,889 60,260 3 Novo-
Kozhuhovskaya4280.2 2.4 68,836 38,807 4 Paveletckaya 3910.0 2.1 59,738 33,678 5 Severnoe Butovo 5492.6 3.8 145,751 82,169 6 Chorosheevskaya 2978.6 2.4 47,903 27,006 Total: 27862.7 515,297 290,505
Total for 19 stations: 646444.9 11,941,904 9,138,496
Expected cost savings for one full year:
23,883,808 kWh 18,276,992 Rubles
Cost Savings Calculations at a Moscow Sewage Station After the Installation of ARI Hydraulic Check Valves
The cost savings calculation is based on lowered head losses as a result of the installation and use of ARI hydraulic check valves on the system. The results were gathered from tests that were performed over a period of time that reflected the changing working conditions at the pump station.
The use of the ARI Hydraulic Check Valves resulted in lowered head losses (h) = 0.9m Energy savings in kWh for the first half of 2008 was measured according to the formula:
Q = water volume 1000m3
0.7 = pump and motor savings
n = number of check valves
TiPump = work time of one pump during first half of year 2008
QPS = total flow at a particular pumping station
All calculations based on the rate of 0.7401 Rubles/kWh
Actual Energy Savings Measurements With the Installation and Use of ARI Air Valves
Estimated pump energy savings is based on the total specific energy consumption (E) divided by the total volume of water (Q) for a specific time period, With and without the use of ARI Air Valves (U = E/Q).
To eliminate the influence of different work regimens of the pump station on the savings, a period of 7 days was used for the calculations.
Pump Station with High-Voltage Pumps
The energy saving is calculated by the formula:
when: Q x1000m³ = total volume of water for the first half year 2008
and:
The cost savings is calculated according to the rate of 0.7401 Rubles/kWh for the pump stations with high-voltage pumps and 1.7738 Rubles/kWh for the pump stations with low-voltage pumps.
Actual Energy Savings Calculation with the Installation and Use of ARI Hydraulic Check Valves
Estimated pump energy savings is based on the total specific energy consumption (E) divided by the total volume of water (Q) for a specific time period, With and without the use of ARI Hydraulic Check Valves (U = E/Q).
To eliminate the influence of different work regimens of the pump station on the savings, a period of 4 days was used for the calculations.
The savings effect is calculated by the formula:
when: Q x1000m³ = total volume of water for the first half year 2008
and:
The cost savings is calculated according to the rate of 0.7401 Rubles/kWh for the pump stations with high-voltage pumps.