SEALANT CURING OVENPresentersKhoi NguyenMeshari Al Ebrahim
Engineering Design TeamPaul LucasMircea BecKhoi NguyenThong TruongMeshari Al EbrahimAsgedom Gebrehiwot
PSU Faculty AdvisorDr. Faryar Etesami
Boeing Industry AdvisorRory Olson
Project Background PDS Summary Previous Design
Steam Injection: advantages and disadvantages.
Water Atomization: advantages and disadvantages.
Current Design: Stulz-Ultrasonic Humidifier. Questions
Preview
Objective:◦Produce a retrofit-able sealant oven capable of
controlling humidity and temperature that allows for more efficient flow control
Current Methods:◦Large size - inefficient flow control◦Anchored to floor - Costly to move
Project Background
Performance◦RH 50 ± 5% @130 ± 5 o F◦Un-Plumbed
Ergonomics◦< 35 lbm supply
PDS Summary
Atomizing Water Method:Advantages Inexpensive Suitable for lower temperature
and lower humidity
Disadvantages Droplet/moisture formation Temperature change
Previous Design
Steam Injection Method:• AdvantagesHigher RH (100%)Dry processNo temperature change
• DisadvantagesDelay initial steam supplyMore complex designExpensive (steam generator)Mass Flow rate from 4 lbm/hr to 60 lbm/hr
Previous Design Cont.
State 1: (Room condition)
P1,a = 101.33 Kpa T1 = 25oC = 278.15 K RH = 65% P*Air (25oC) = 3.17
kPa V1 = 36 ft3 = 1.02 m3
State 2: (Required condition)
Poven = ? T2 = 57oC = 330.15 K RH = 50% P*Air (57oC)=17.85
kPa V2 =18 ft3 =0.51m3
Estimate Pressure In Operating Oven
Poven = 471 kPa
Assume: Curing products occupied 50% volume
V1 = 1.02 m3 V2 = 0.51 m3
P1 = 103.39 kPa P2 = 471.00 kPa RH = 65% RH = 50% T1 = 298.15 K T2 = 330.15 K
Mass flow rate: 1.52 lbm/hr
Estimate The Flow Rate of Steam
Stulz-Ultrasonic HumidifiersAdvantages: Very fine mist Small size (10.71” x 8.27”) Long service life Mass Flow Rate up to 4 lbm/hr
Current design
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RHTemperature
Time (sec)
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Temperature Vs. Time
Parts Illustrations
Current Progress
Humidifier Design: Including on board water tank, fan and controls
?Questions
