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BOAT HANDRAIL HEATING SYSTEM. Group 11 Oscar Garcia Nik Hartney Pamela Mills Nicole Turner. Boat Hand Rails. Used to provide a secure handhold Exposed to external weather conditions Susceptible to temperature changes May become uncomfortable to hold. Heating System. - PowerPoint PPT Presentation
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BOAT HANDRAIL HEATING
SYSTEM
Group 11Oscar GarciaNik HartneyPamela MillsNicole Turner
Boat Hand Rails Used to provide a secure handhold
Exposed to external weather conditions
Susceptible to temperature changes
May become uncomfortable to hold
Heating System Allows passengers to remain
secure
Provides comfort
Helps prevent frostbite
Design Needs to run off of minimal energy
Versatile enough to be applied to any boat with an inboard engine
Must have a controllable temperature as to not overheat or remain too cool
Alternate Designs
Electrical resistance heater
Seawater coolant heat exchanger
+ -Resistive Heater
Electrical Source
Heat Exchanger
Sea Water Feed
Heating Fluid
HandrailPump
Final Design
Raw seawater coolant flowing directly through handrail
Harnesses waste thermal energy No need for complex electrical system
Handrail
Seawater Exhaust
Design Specifics Dual opposing flows to regulate
average temperature Thermally conductive fluid conduit Variable throttle for seawater
coolant intake Open fluid system Piping system insulation
Computations and Testing
System parameter assumptions
Km
W
D
kNuhext 2
3.51
External Forced convective heat transfer
Trail = 27C Tatmosphere = -20C
Drail = 2 inches = 0.051m Vwind = 20 mi/h = 8.94m/s
Texhaust=92 C kWQengine 342
Computations and Testing
Handrail heat loss per meter
mW
TTDhl
Qoext
/8.3842533000508.03.51
)( 2,2
Computations and Testing
KmWD
Nukh 2
int /88.12901905.0
676.066.3
lnTcmQ p
KAh
QT 506.49
01905.088.129
8.384
intln
Log mean temperature difference
Computations and Testing
Mass flow rate and Velocity of seawater
sec/00186.0506.4918.4
3848.0
ln
kgTc
Qm
p
sec/00326.0
01905.01000
00186.02222
mD
mV
Cost Analysis Piping material
selection: inexpensive, conductive
Connections and Valves
External thermometer
Conclusion Provide a temperature controlled
railing system Minimal impact on boat’s systems Allow comfort and security for boat
passengers