Appropedia needs your support - Please Donate Today

Experimental Characterization of Heat Transfer in an Additively Manufactured Polymer Heat Exchanger

From Appropedia
Jump to: navigation, search

Sunhusky.png By Michigan Tech's Open Sustainability Technology Lab.

Wanted: Students to make a distributed future with solar-powered open-source 3-D printing.
Contact Dr. Joshua Pearce or Apply here

MOST: Projects and Publications, Methods, Lit. reviews, People, Sponsors
Twitter updates @ProfPearce

OSL.jpg


Pearce Publications By Topic: Energy Conservation Energy Policy Industrial SymbiosisLife Cycle Analysis Materials Science Open Source Photovoltaic Systems Solar CellsSustainable Development Sustainability Education



Source[edit]

Status
This OSAT has been designed but not yet tested - use at own risk.
This OSAT has been modeled.
This OSAT has been prototyped.

You can help Appropedia by contributing to the next step in this OSAT's status.

Abstract[edit]

Hxpol.png

In addition to their low cost and weight, polymer heat exchangers offer good anticorrosion and antifouling properties. In this work, a cost effective air-water polymer heat exchanger made of thin polymer sheets using layer-by-layer line welding with a laser through an additive manufacturing process was fabricated and experimentally tested. The flow channels were made of 150 μm-thick high density polyethylene sheets, which were 15.5 cm wide and 29 cm long. The experimental results show that the overall heat transfer coefficient of 35-120 W/m2K is achievable for an air-water fluid combination for air-side flow rate of 3-24 L/s and water-side flow rate of 12.5 mL/s. In addition, by fabricating a very thin wall heat exchanger (150 μm), the wall thermal resistance, which usually becomes the limiting factor on polymer heat exchangers, was calculated to account for only 3% of the total thermal resistance. A comparison of the air-side heat transfer coefficient of the present polymer heat exchanger with some of the commercially available plain plate fin heat exchanger surfaces suggests that its performance in general is superior to that of common plain plate fin surfaces.

Keywords[edit]

Polymer heat exchanger; plastic heat exchangers; advanced heat exchangers; layer-by-layer line welding additive manufacturing; process intensification; polymer welding; laser welding; polymer laser welding; additive manufacturing; open hardware; linear low density polyethylene; LLDPE; heat exchangers

Highlights[edit]

  • HDPE polymer HX is fabricated using layer-by-layer line welding of plastic sheets.
  • Experimental testing of the HX has been successfully performed.
  • The polymer-based wall thermal resistance is no longer the limiting factor.
  • The polymer HX shows superior air-side performance over plane plate fin surface.

Replicate these results with laser welding system[edit]

See Also[edit]