Saturn Pyro Sdn Bhd
Johor Bahru Office
44 & 44A, Jalan Palma Rafis 1,
Taman Dato Chellam,
81800 Ulu Tiram,
Johor, Malaysia.
+607-8628455
+607-8628466
enquiry@saturnpyro.com
Shah Alam Office
Block 11, No. 4-1B,
Jalan Pahat J15/J,
Kompleks Otomobile
Shah Alam Seksyen 15,
40200 Shah Alam,
Selangor, Malaysia.
+607-8628455
+607-8628466
Penang Office
Penthouse 1-21-1,
Suntech @ Penang Cybercity
Lintang Mayang Pasir 3,
11950 Bayan Baru,
Penang, Malaysia.
+607-8628455
+607-8628466
desmond@saturnpyro.com
Singapore Office
Saturn Pyro Pte Ltd
101 Kitchener Road,
#02-42 Jalan Besar Plaza,
Singapore 208511.
+607-8628466
Penang Office
Penthouse 1-21-1,
Suntech @ Penang Cybercity
Lintang Mayang Pasir 3,
11950 Bayan Baru,
Penang, Malaysia.
+607-8628455 +607-8628466 desmond@saturnpyro.comSingapore Office
Saturn Pyro Pte Ltd
101 Kitchener Road,
#02-42 Jalan Besar Plaza,
Singapore 208511.
+607-8628455
+607-8628466
+607-8628466
India Office
Saturn Pyro India
3, Gr Floor, Eishita,
Shiv Vallabh Cross Road,
Ashokvan, Dahisar (E.),
Mumbai 400068.
Saturn Pyro India
3, Gr Floor, Eishita,
Shiv Vallabh Cross Road,
Ashokvan, Dahisar (E.),
Mumbai 400068.
+91 22284 84682
+91 98191 56654
VSD SAVINGS CALCULATOR FOR PUMPS
References and Equations
References:
 |
For the energy savings analysis, this tool used power curves developed from data obtained by measuring the operating characteristics of various fans and from information provided in "Flow Control", a Westinghouse publication, Bulliten B-851, F/86/Rev-CMS 8121. The curves are representative, not precise. Final economic analysis should be based on actual power (kW) measurements of the pumping system. |
Constants:
Conversion Constant (kW/hp) = 0.746
Polynomial Coefficients A1, A2, A3 and A4:
Polynomial Coefficients A1, A2, A3 and A4:
| Type of Flow Contorl | A1 | A2 | A3 | A4 |
| 1 | 55.21240 | 0.63700 | -0.00190 | 0.00000 |
| 2 | 16.39683 | -0.05647 | 0.01237 | -0.00003 |
| 3 | 13.51137 | 0.34467 | 0.01269 | -0.00007 |
| 4 | 102.00000 | 0.00000 | 0.00000 | 0.00000 |
| VSD | 27.44751 | -1.00853 | 0.01762 | 0.00000 |
Equations:
Power at Design CFM = Nameplate Horsepower × Conversion Constant (kW/hp) × Motor Load at Design GPM / Nameplate Efficiency
Computed for each capacity level:
Percent of Design kW = A1 + (A2 × Capacity) + (A3 × (Capacity2)) + (A4 × (Capacity3))
Percent of Design kW for VSD = A1 + (A2 × Capacity) + (A3 × (Capacity2)) + (A4 × (Capacity3))
Percent of Design kW = A1 + (A2 × Capacity) + (A3 × (Capacity2)) + (A4 × (Capacity3))
Percent of Design kW for VSD = A1 + (A2 × Capacity) + (A3 × (Capacity2)) + (A4 × (Capacity3))
Current Power (kW) = Percent of Design kW × (Power at Design CFM / 100)
VSD Power (kW) = Percent of Design kW for VSD × (Power at Design CFM / 100)
VSD Power (kW) = Percent of Design kW for VSD × (Power at Design CFM / 100)
Current Energy (kWh) = Current Power (kW) × (Percent of time at this Capacity / 100) × Operating Hours
VSD Energy (kWh) = VSD Power (kW) × (Percent of time at this Capacity / 100) × Operating Hours
VSD Energy (kWh) = VSD Power (kW) × (Percent of time at this Capacity / 100) × Operating Hours
Current Annual Energy Use = sum of all Current Energy (kWh)
VSD Annual Energy Use = sum of all VSD Energy (kWh)
Annual Energy Savings = Current Annual Energy Use – VSD Annual Energy Use
Annual Cost Savings = Annual Energy Savings × Cost of Electricity
VSD Annual Energy Use = sum of all VSD Energy (kWh)
Annual Energy Savings = Current Annual Energy Use – VSD Annual Energy Use
Annual Cost Savings = Annual Energy Savings × Cost of Electricity
VSD Savings Calculator For Pumps
| Nameplate Horsepower | hp | Annual Operating Hours | hp | |||||||||||||||||||||||||||||||||||||||||
| Nameplate Efficiency | % | Type of Flow Control | ||||||||||||||||||||||||||||||||||||||||||
| Motor Load at Pump Design GPM | % | Cost of Electricity | RM/kWh | |||||||||||||||||||||||||||||||||||||||||
| Duty Cycle | ||||||||||||||||||||||||||||||||||||||||||||
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| Energy and Cost savings | ||||||||||||||||||||||||||||||||||||||||||||
| Current Annual Energy use | kWh/yr | |||||||||||||||||||||||||||||||||||||||||||
| VSD Annual Energy Use | kWh/yr | |||||||||||||||||||||||||||||||||||||||||||
| Annual Energy Savings | kWh/yr | |||||||||||||||||||||||||||||||||||||||||||
| Annual Cost Savings | RM/yr |