Fuel Unloading / Forwarding / Transfer
There are a wide range of fuels that a plant can burn and they arrive into a power plant through various means - rail car‚ ship‚ tank truck‚ etc.. Unloading pumps feed directly into a storage tank often times without a control valve/system and are found on the ‘vehicle’ or may be part of the tank storage system.
Our experience shows that when fuel is allowed to sit in a rail car‚ tank truck‚ etc. the viscosity of the fluid can increase. This change results increased input torque requirements and potentially the delivered. In positive displacement pumps‚ the delivered flow will increase and in centrifugal pumps the amount will decrease. It is important when sizing your pump to consider the properties of the fluid‚ pressure‚ supply and operational objectives.
Some storage systems use a “day tank” that holds about a day’s worth of “treated” (Filtered‚ additives added‚ and/or blended) fuel near the power plant leaving the larger volume storage somewhat more remote from the generating facility. Transfer pumps are needed to keep the day tank supplied as well to move oil from one tank to another. Also‚ transfer or forwarding pumps will be needed to send fuel oil to the inlet of the fuel injection pumps from either the day tank or the main storage tanks.
The distance that the fuel has to travel is an important consideration. Be sure to calculate the frictional loss in your pipeline so you know the maximum discharge pressure and the size of the driver required to overcome the pressure differential.
Commonly used pumps in this application include three screw‚ two screw and centrifugal.
| Flow Rates up to | Pressures to up to | Max Fluid Temperature | CIRCOR Brand‚ Series & Pump Type |
| 91 m^3 / h 400 GPM | 34.5 bar 500 psi | 121C 250F | IMO 3D Three Screw |
| 272 m^3/h 1‚200 GPM | 70 bar 1‚015 psi | 82C 180F | IMO 8L Three Screw |
| 317 m^3/h 1‚400 GPM | 100 bar 1‚450 psi | 250C 482F | Allweiler SN Three Screw |
| 480 m^3/h 2‚120 GPM | 16 bar 232 psi | 140C 284F | Allweiler NB Centrifugal |
| 750 m^3/h 3‚300 GPM | 21 bar 300 psi | 260C 500 F | IMO 323F Three Screw |
| 792 m^3/h 3‚500 GPM | 97 bar 1‚400 psi | 121C 250F | Warren FSXA Two Screw |
| 1‚100 m^3/h 4‚844 GPM | 16 bar 232 psi | 100C 212F | Houttuin 216.40 Horizontal Two Screw |
| 1‚100 m^3/h 4‚844 GPM | 16 bar 232 psi | 100C 212F | Houttuin 211.40 Vertical Two Screw |
| 2‚300 m^3/h 10‚158 GPM | 16 bar 232 psi | 140C 284F | Allweiler NT Centrifugal |
| 2‚500 m^3/h 11‚008 GPM | 16 bar 232 psi | 140C 212F | Houttuin 236.40 Horizontal Two Screw |
