Presented by:

Mark Drow

David Eoff

DIESEL FUEL OIL SYSTEMS

AGENDA

MARK DROW

DAVID EOFF

ABOUT PREFERRED UTILITIES

• Preferred Utilities: Fuel Oil Handling

• Preferred Instruments: Boiler Controls

• W.N. Best: Combustion Systems

• Preferred Engineering: Nuclear Outage Support

ABOVEGROUND VS. UNDERGROUND

ABOVEGROUND OVERVIEW

UL142 UL2085

UNDERGROUND OVERVIEW

HYPOTHETICAL PROJECT EXAMPLE

FUEL LOAD CALCS: START HERE

TRICK QUESTION

OTHER FUEL LOAD CONSIDERATIONS

DAY TANKS

DAY TANK SIZE

MULTIPLE DAY TANKS

• If a pump set is supplying more than one day tank, a flow

control manifold (fill valve) will be required on each day tank.

• If any tank calls for oil, the pumps are energized and the

flow control manifold for that tank is opened.

• Fill valves usually have a manual bypass.

• Sometimes fill valves are motorized ball valves with

open/close limit switches.

Sidenote: A similar strategy may

be used when returning fuel from

day tanks to multiple bulk storage tanks…

CONTROL STRATEGY OVERVIEW

Supply

Return

Containment

High

Pump stop

Pump Start

Low

Control Panel

Containment Leak Detector

• If a pump set is supplying more than one day tank, a flow control manifold (fill valve) will be required on each

day tank.

• If any tank calls for oil, the pumps are energized and the flow control manifold for that tank is opened.

• Fill valves usually have a manual bypass.

• Sometimes fill valves are motorized ball valves with open/close limit switches.

DAY TANK CONTROLS

LEAK DETECTION

LEAK DETECTION

• Required in tank interstitial spaces.

• Recommended in pump set leak basins.

• Required in containment piping.

• A good idea anywhere oil is likely to leak and accumulate.

Note: NFPA code is mute on how many leak detectors are required in containment piping.

PUMPS

Pump Sizing Rule of Thumb:

4:1 ratio, or pumps running 25% of the time

TYPICAL PIPING ARRANGEMENT

Main Oil Tank

Emerg. Gen.

with Rupture Basin

Day Tank

Pump

Supply

Return

Fill

Vent

Suction

GENERATOR

LOOP

PUMPS SIZED FOR

CONSUMPTION

PLUS SAFETY

FACTOR

ALTERNATE PIPING ARRANGEMENT

Main Oil Tank

Emerg. Gen.

with Rupture Basin

Day Tank

Pump

Supply

Return

Fill

Vent

Suction

PUMPS SIZED FOR

PUMP RATE PLUS

SAFETY FACTOR

VALVES – MOST COMMON

VALVES – OTHERS

PLC CONTROLS

ELIMINATE PROBLEMS BEFORE THEY HAPPEN

GEN FLOW VS. CONSUMPTION

HOT AREAS

COLD AREAS

FUEL FILTRATION

PIPE SIZING

SUCTION PIPING

VENT PIPING

REMOTE FILL PORTS

PUMC PIPE SIZING PROGRAM

THANK YOU!