Microchannel Heat Exchanger Flow Loop

Team 16 Final Technical ReportApril 29, 2015

MECE: Capstone 2014-2015

Jeremy Evans, Olivia Pacheco, John-Roland Espinosa, Michael Russo

Outline

Project BackgroundStatement of WorkDeliverables and ValidationMethodologyResults and AccomplishmentsConclusionRecommendations

Introduction to Problem

http://upload.wikimedia.org/wikipedia/commons/2/25/AMD_heatsink_and_fan.jpg

http://h10025.www1.hp.com/ewfrf-JAVA/Doc/images/1003/c03904186.jpg

Background

Heat flux can reach

Background (make eq. more readable)

𝒇= ∆𝑷𝑫𝒉𝑳𝟎.𝟓𝝆𝑼𝟐

Statement of Work

1. Create a coolant flow loop incorporating a microchannel heat exchanger to be used in MECE 4371

2. Compose a flow loop manual 3. Write two lab experiments for students to

conduct in MECE 4371 dealing with fluid and thermal theories

Deliverables and Validation

A completed flow loop containing a microchannel heat exchanger

Two lab manuals incorporating the completed flow loop to be used for experiments in MECE 4371

Experimental temperature and pressure data with theoretical correlations

Coolant loop performs as specified by Dr. Liu

Methodology & Process

• Research• Internet• MECE coursework• Dr. Liu’s thesis

• Analysis to determine required components and specifications

• Determine theoretical predictions, required formulas and relations

• Receive and test all ordered components• Prime the pump• Assure that voltage conversions

are safe and accurate

Methodology & Process

Flow rate to remove optimal heat flux:

Pressure drop calculation from friction factor definition:

Required capability of heat cartridges in order to attain desired 100 heat flux:

Methodology & Process

• Construct flow loop (precision required!!)• Determine component layout• Cut and bend steel piping• Machine G10• Build and implement fixtures for

pump, rotameter, MCHX assembly and condenser

• Configure software • Set up data acquisition multiplexer

with TC and PT connections

Methodology & Process

• Run Nusselt’s Number and Friction Factor experiments and document processes

• Compare measured data for experiments with theoretical predictions and provide to client

• Document flow loop operation instructions

Results/Accomplishments

1. Milestone 1 – Component Fabrication and Procurement Completed

2. Milestone 2 – Flow Loop Assembled

3. Milestone 3 – Flow Loop and Experiment Documentation

4. Milestone 4 – Final Design Validated for Client

COMPLETED

COMPLETED

COMPLETED

COMPLETED

Results/Accomplishments

1. Flow Loop Constructed and Validated Show temperature and pressure data vs. flow rate,

explain the trends that were sought, etc. Show pictures of completed flow loop

2. Friction Factor Experiment and Validation Show f*Re plot with theoretical curve Show theoretical relation

3. Nusselt’s Number Experiment and Validation

Show f*Re(???) plot with theoretical curve Show theoretical relation

Results/Accomplishments

Flow loop constructed

Results/Accomplishments

Item Cost Vendor

Gear Pump with AC Motor and Controller $1,434.00

Cole ParmerGroundwater Filter 5.0UM $47.25Turbine Flowmeter $75.00

Copper Liquid-Liquid Heat Exchanger $319.00 Lytron

Stainless Steel Reservoir $350.90McMaster-CarrT-Type Thermocouple $18.50

Stainless Steel 0.25” Piping 6 feet $19.42Swagelok fittings, control valves and

bypass$1,500.00 Swagelok

Reverse Osmosis Water $40.00Data Acquisition (DAQ) and module with

software and connections$499.00

EbayG-10 Material $51.01

Cartridge Heaters $372.00 OmegaPressure Transducers $450.00Soft insulating material (Mylar Blanket) $4.00

High temperature sealant and Locktight $9.00

Polycarbonate $12.33 US Plastic CorpStainless Steel Cart $149.33 Amazon

NPT Reducers for PT Connection $16.89 Summit Racing

TOTAL $5367.63

Results/Accomplishments (update numbers)

Conclusion

Thermal management is gaining priority as the number of transistors per IC increases in modern computers.

The flow loop, its manual, and both experiment manuals have been completed and delivered to the client on time and were approved

Recommendations

Extensions to experiments: 2 – phase flow experiments Slug flow experiments

Improvements to flow loop: Pressure transducers with increased voltage range More accurate rotameter Different housing design – improved fit between

copper block and housing, easier manipulation of o-rings