Heat Exchanger By Saad Alqahtani Ian Chandler Jaclyn

Heat Exchanger By: Saad Alqahtani, Ian Chandler, Jaclyn Kamenicky, Nate Stanton Advisor: Junfang Ma Date: 4/26/2016

Introduction Lockheed Martin (LM) : Lockheed Martin has major interests in Aerospace & Defense, Information Technology, Space and Emerging Technologies. LM is lead by CEO Marillyn Hewson. Computer Heat Exchangers Very important part of the computer Cools down the computer Without computer heat exchanger then the computer will explode

The Project ● Redesign existing heat exchanger ● Choose proper AM method and material ● Same size and mating features ● Can change internal geometry

Basis of Project ● Problems with current heat exchanger ○ Heat Transfer surface area ○ Laminar flow channels ● Additive manufacturing ○ Can decrease cost of manufacturing ○ Can increase speed of production ● Material ○ Heat transfer coefficient

Project Presentation Shifted Rectangular design Same surface area Shift changes airflow Simple design allows easy manufacturing

Other Ideas ● Different kinds of finned heat exchangers ○ Plain ■ Simple triangles or rectangles ○ Herringbone ■ Zig-zag ○ Serrated ■ Cuts

Heat Transfer Details ● q=UA T ○ q = heat transferred ○ U = Heat transfer coefficient ○ A = Surface area ○ T = Difference in temperature between materials ● Laminar Flow/ Turbulent Flow ○ Laminar flow - condition of smooth flow

Manufacturing Process/ Materials Direct Metal Laser Sintering Quick and Accurate Costs Metal Material Copper or Aluminum Best heat transfer coefficient Corrosion Resistant

Difficulties of the Project ● Deciding on what part to redesign ● Finding a design everyone agreed on ● Figuring out if our design would make a beneficial difference in the flow of heat ● Solid. Works

Skills developed/ learned from project Understanding the flow of heat Heat transfer formula Heat transfer coefficients of different metals

Conclusion/ Questions In conclusion, just by shifting the rectangular design for the heat exchanger, we improved efficiency and allowed for better flow of heat throughout the design.