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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ture

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Temperature Vs. Time

Parts Illustrations

Current Progress

Humidifier Design: Including on board water tank, fan and controls

?Questions