1. Load
Generator
(Gen1)
ESM
(Battery)
ESM
(Capacitor)
Cable
Circuit Breaker
Location
Switch Board (SWBD)
Electrical System Architecture Modeling
Authors: Adam Tucker and Tristan Scott, Code 326
Mentors: David Woodward, Code 326, Nathan Spivey and Dan Santosusso, Code 322
Shawn Plesnick, Code 323
Project Objective
• Looking into the benefits of shared
energy storage in a Medium
Voltage Direct Current (MVDC)
Zonal Design
Project Approach
• Perform literature search of past
ESM studies
• Assist in creating MATLAB/Simulink
model representative of a FSC
electrical distribution system
Literature Search
• Ship Integration
• Electrical Integration
• ESM Technologies
• Lessons Learned Spreadsheet
Energy Storage Module (ESM) Benefits
Distribution A: Approved for public release; distribution unlimited.
• Generators are not able to handle
repetitive transients of high magnitude
• ESM profile can source the spikes of the
load profile that the generator is unable to
support (Load Leveling, Peak Shaving)
• Aids Uninterruptible Power Systems
(UPS)
• Potential to reduce electrical/mission
systems total size, weight, and cost
• Single Generator Operations
Basic MVDC Zonal Architecture Simulink Model
Evolving Electrical
Distribution Systems
Past and Present
• Many individual loads with a
predictable power profile
•Low variance
•Smaller load size relative to
generation
• Energy Storage required only for a
few loads
•Uninterruptable Power Supply
(UPS) functions
•Power storage locally
Future
• Need for energy storage continues
to increase
•Electromagnetic Rail Gun
(EMRG), Radars and Lasers
•Transient pulse loads
• Increasing Energy Storage Modules
(ESM) into the distributed system
could prove cost effective
ESM Technologies
• Flywheels
•Capacitor Banks
•Propulsion Inertia Storage
•Battery Systems
• Lithium Ion, Lithium Iron Phosphate,
Lead Acid
Lead acid cells weigh
3x more than an
equivalent lithium
iron phosphate.
Future Work
•Emphasize literature search on ESM
equipment ratings
• Power, Energy,
Charge/Discharge Rate, Size
• Ratings will be used in the
Simulink model to be more
representative of an electrical
system
•Upcoming Challenges
• Incorporating propulsion and rotor
Inertia Energy Storage into the
model
• Incorporating the ability for ESM’s
to handle negative power demand
• Incorporating multiple loads,
generators, ESM’s, and efficiency
Load Leveling with High Pulse Profile
User Defined Parameters
• Electrical Architecture & Plant Alignment
• ESM capacity, location and electrical ratings
• Load profile definition
• Generator Power Ramp Rate
• Ship speed constraints
Outcome
• Equipment sizing and ratings
• Switchboards, loads, generator
and ESM’s
• Design feasibility
• ESM state of charge
Electromagnetic Railgun Testing
Battery Technology Comparison Chart
Example of Simulink Model
• Generator Load
Profile
• ESM Load Profile
• High Pulse Profile

2. LCC-19 Model VS-50 Oil Water Separator (OWS) Install
and Analysis and Correction of Oil Water Transfer System (OWT)
Engineering Operation Sequencing System (EOSS) Diagrams
Current Oil Water Separator (Model C-50) has
operational deficiencies
Problematic “pull thru” vacuum type system
High repair and maintenance costs
Single speed operation, leading to inefficient oil-
water separation
Equipment located atop separator itself. Pumps
are unreliable and system is not truly integrated
Current Limitations Post-Upgrade Benefits
 “Push thru” VS-50 system eliminates most
operational deficiencies, as demonstrated on
LHD-1 and CVN-70
 Variable flowrate operation for increased OWS
performance & effluent quality improvement
 Sustainability and survivability due to the
installment of reliable and efficient parts that are
fully automated:
• Automatic self-cleaning
strainer
• Automatic pump priming system
• Automatic Oil Content Monitor (OCM)
flushing system
• Automatic system for removal of bulk oil
from Oily Waste Holding Tank (OWHT) to
be discharged into Waste Oil Tank (WOT)
• Flange mounted float Tank Level Indicators
(TLI)
 Integration of all subsystems, such as OCM,
TLI, and Pressure Reducing Station
 Advanced user interface for ease of operation
and reduction of operator error
Figure 3. (Right & Below) Photographs
of (prototype) single VS-50 Oily Water
Separator system to be installed in Engine
Room of LCC-19
Figure 7. (Above) User Interface Control System,
designed to reduce operator error
(Above) Photograph of LCC-19, USS Blue Ridge
Source: http://www.navsource.org
DISTRIBUTION A: Approved for public release; distribution unlimited
Figure 1. (Above) Model C-50 OWS System
Figure 4. (Left) Example
of Oily Water Transfer
Pump to be ripped out
and replaced.
Figure 5. (Right)
Example of Oily Water
Transfer Pump that is
being used to replace
older pumps (includes
correct configuration of
hoses and isolation
valves)
Figure 2. (Above) Model VS-50 OWS System and
Fluid Flow Schematic
In order to fabricate label plates for all existing and new components on the ship, several
Engineering Operation Sequencing System (EOSS) Diagrams were validated and cross-
checked for accuracy. All discrepancies were accounted for via ship inspection, and are
to be corrected to reflect the actual ship configuration.
OWS
Conversion from OWS
Model C-50 to Model
VS-50
Addition of a self-
cleaning strainer to
reduce OWS
maintenance
Corrosion resistant
components (e.g. Relief
valves to military
specifications)
PLC-based “smart”
automated system
OWT System
Replacement of
Blackmer rotary vane
OWT Pumps with more
appropriate Megator
sliding shoe pumps
OWT Pump
configurations that allow
for survivability in the
event of component
failures, including jumper
hose connections and
isolation valves
Proposed Upgrades
Due to the age of the
ship, the current OWT
system is unusual. A
master “as-is”
diagram was drafted
to show all valves,
components, and
cross-connections to
other systems as
accurately as
possible.
The team was able to
coordinate with SRF-
JRMC (Japan) to
clear discrepancies
between EOSS
diagrams.
OWT System Diagram
Figure 6. (Right)
Diagram of self-
cleaning strainer
Erin Signor and Erin Donnelly, Code 631
Mentors: Stephen Hopko and Ray Morales, Code 631