1. Fish Gills: A New Approach to Heat Exchange
Presented by: Drew May, Hannah Feldstein, Kyle McIlroy
Professor: Junfeng Ma
Presented on 4/26/16

2. Design Background
Conceptual information and developing solutions

3. What is the purpose of Heat Exchange?
Device used to redistribute the heat concentrations of two or more substances
Usually uses fluids or gases
High or low temperatures

4. Counter Current Flow
Most efficient means of heat or concentration transfer
Widely used in biological settings

5. What are the inefficiencies of design?
Proposed models for heat exchange
Fluid-fluid transfer
Heat intermediary
Limited by the constraints of traditional manufacturing
Often the most efficient model for exchange is difficult to make
Current models are restricted to parts that can be bored from solid blocks or assembled in sheets

6. Opportunities in Additive Manufacturing
AM is the process in which a 3-D object is synthesized from the creative electronic design of an engineer
FEW LIMITS!

7. Where can AM can benefit Heat Exchange?
Surface area
Versatility of design
Organic shapes

8. Respiratory System Most effective material transfer on planet
Huge surface areas
Extremely permeable
Evolutionarily proven

9. Scaling it Up
A dynamic design based on a fishy origin

10. Gills Core-y High surface area-volume ratio Compact design
More Weight!
Gills Core-y
High surface area-volume ratio
Allows for effective heat exchange to occur along whole machine
Compact design
Gills have high frequency of compartments
Weight is severely reduced

11. Corrugation Seen in cardboard Mimics the high-surface area of gills
Low material cost

12. Difficulties in Development
How to translate idea into CAD
Linearization of a typically radial format
Large-scale production feasibility

13. Translating to CAD Use of “series” tool
Inversion and off-setting overlapping areas
Mirrored multiple times
Mating surface additions

14. Assimilation of Design
Biology is often messy
Needed to make this orderly so it can be efficient
Created complete symmetry while maintaining core ideas

15. How to make this Large Scale?
Patterns
Trigonometric oscillations (0, pi, 2pi)
Minimal material

16. What we Learned Can be difficult to translate a good idea into CAD
There needs to be forethought before you begin to make progress
Air-flow is dependent on the average volumetric path, heat transfer is dependent on surface area

17. Thanks & Questions