Post on 10-Feb-2017
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!