Mobile Environment Chamber

End of Term Progress ReportTeam members:

Tuan Ngo (presenter 1)

Giang Nguyen (presenter 2)

Duc TranPeter ElabdThien NguyenThe Duong

Advisor:

Dr. Mark Weislogel

OUTLINE

• Mission

• Project status

• External /Internal Search

• Concept Evaluation and Selection

• Progress on detailed design

• Conclusion

MISSION

Chamber

PC Controller

Facility

Actuator

Solid State Drives

Set TBasic requirements

• Temp. range: -5 oC to 105 oC

• Accuracy: ± 2 oC

• Temp. uniformity: ± 4 oC throughout

the chamber

• Transient:10 oC /minute

• Airflow: 0.5 m/s minimum across

DUT

• Versatile

A chamber that provide temperature controlled air to SSDs while SSDs are powered on and functionally tested

Problem Identification

Requirements

External search

Concept Generation

Concept Evaluation and Selection

Detailed Design

PROJECT STATUS

We are here

Proposal

PDS

Summary of external/ internal search and final concept

selection

EXTERNAL/ INTERNAL SEARCH

External / Internal Search

Layout designSub-component

selection

EXTERNAL/ INTERNAL SEARCH

Layout Design Sub-component Selection

Technical issues to address:

• Heating/cooling method

• Temperature uniformity

• Air flow requirement

• Water condensation

EXTERNAL/ INTERNAL SEARCHElectrical Components Layout Design Sub-component Selection

• Controller

• Chiller

• Heater/ heat exchanger

• Fan

• Insulators

CONCEPT SELECTIONFundamental Design

PROS CONS

Compact Temperature uniformity

Counter-flow air movement Condensation risk

Capacity

CONCEPT SELECTIONLow Risk Design

PROS CONS

Thermal Uniformity Mobility

Condensation Prevention Manufacturability

Cost

CONCEPT SELECTIONImproved Design

PROS CONS

Temperature uniformity Mobility

Condensation prevention

Counter-flow air movement

Concept scoring matrixWeight

Fundamental design Low-Risk design Improved design

Cost3

9 9 12

Performance5

Temperature uniformity2 4 4 8

Condensation prevention1 2 5 4

Capacity2 4 8 8

Mobility2

10 6 6

Total 10 29 32 38

CONCEPT SELECTION

PROGRESS ON DETAILED DESIGN

Chamber as part of testing system

Main componentsController: Watlow PM3 digital PID controller - Recommended by Intel.- Optimized for thermal control

Main componentsValve:

- Regulating flow: Globe valve

- Electric control valve

Main componentsHeating element:Strip heater- Less space required- Low cost

Main componentsSensor:Resistance Temperature Detector (RTD)- Fast response time- Reliable- Accurate

Main componentsFan:- Flow rate at least 0.5 m/s across SSDs- Higher flow rate, higher thermal uniformity

but higher cost.- Must sustain Temp. up to 105oC

Main componentsHeat exchanger:Cooling coil

Need analysis on:- Material

- Dimensions: length, wall thickness

- Fins or no fins

Main componentsInsulation:

Preferred characteristics:- High thermal resistivity.- Low cost.- Light weight.- Safe: fire-proof.

More analysis and research required.

Any decisions now could be changed based

on further analysis and updated PDS.

Biggest potential risk: availability of parts.

Next step: start parametric design in Spring

term.

CONCLUSION

Q & A