Lattice Structures for Heat Exchangers

 


Heat exchangers are used to convert solar energy absorbed in solar collectors into potable (drinkable) water. Sa179 tubes Is a Leading Supplier & Exporter Of ASTM A106 Pipe And ASME SA106 Pipe.  Steel, copper, bronze, stainless steel, aluminum, or cast iron can be used as heat exchangers. Copper is usually used for solar heating systems since it is a good thermal conductor and has a greater resistance to corrosion. In “compact” heat exchangers, stainless steel is also common.

 Self-supporting behavior is the most desired characteristic for DFAM of cellular structures. In the present work, gyroid, star kagome and BCC cellular structures are evaluated for self-supporting behavior using Materialize Magic’s software. The lattice designs of different sizes are 3D printed and visually examined for defects. The lattice designs are introduced into a smooth circular pipe. Conjugate heat transfer analysis is done for different Reynolds numbers (1193–10736) to study heat transfer and pressure drop characteristics. All the lattice designs show heat transfer enhancement and higher pressure drop with respect to smooth pipe. Among all lattice designs, gyroid shows the highest heat transfer enhancement and highest pressure drop. A micro-scale cross-flow heat exchanger is constructed from a hollow nickel micro lattice structure, which is fabricated by conform ally electroplating nickel onto a sacrificial polymer micro-lattice formed from self-propagating photopolymer waveguides.

 The periodic unit cell of the hollow nickel micro lattice structure tested here includes lattice members with a diameter <1 mm and a nominal pore size <9 mm. The heat transfer performance of the micro-lattice-based heat exchanger is analyzed in terms of thermal conductance per unit volume, which is equal to the value of overall heat transfer coefficient multiplied by surface area to volume ratio.

 

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