Heat Transfer Technologies

Capabilities

HTT is backed by more than 20 years experience in design and manufacturing of heat exchangers. This experience is put to use in the manufacturing of prototype heat exchangers for pre-production evaluation.

Various constructtion types include "tube and fin", "parallel flow", "shell and tube" and "plate-type" heat exchangers.

Typical construction materials include aluminum, copper and stainless steel. Joining methods include aluminum brazing, copper brazing, copper soldering, mechanical expansion and tin diffusion. Heat transfer fluids include refrigerants, various liquids and air.

HTT has expertize in heat exchanger component design, component manufacturing, assembly, fixturing, cleaning, brazing furnace profile settings and quality control.

HTT has designed many unconventional heat exchangers.

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For example:

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1. Brazed aluminum header and tank design with special flow circuiting resulting in 10% performance improvement

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2. 0.8mm OD tube miniature heat exchanger

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3. Cylindrical heat exchanger using copper foam as fins

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4. Cylindrical heat exchanger using heat pipes and aluminum fins

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5. Parallel flow heat exchanger using extruded copper microchannel tubes brazed to serpentine copper fins

HTT is working with numerous academic institutions on the development of new technologies and their associated heat exchangers.

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Aluminum HX

Miniature HX

Copper foam HX

Some notable developments:

Ohio State University: Copper microchannel tube extrusions
MIT: Sorption thermal energy storage system
University of Maryland / Department of Energy: miniature heat exchanger
International Copper Association: Development of 5 and 4mm small diameter tube heat exchanger for HVACR

Recent awards:

DE-FOA-0000413: Hign performance, cold climate heat pump (CCHP) for residential and commercial buildings
D.D-2014.1 SBIR N141-068: Advanced two phase heat exchangers for environmental control
DE-EE0006114: Miniature air to refrigerant heat exchanger

Component manufacturing:

Headers, manifolds, tanks, siderails, expansion tanks
Special manifold headers and components for unconventional flow circuiting

Heat exchanger assembly:

Round tubes down to 0.8mm OD
Flat tubes with serpentine ouvered fins into headers and tank assembly
Flat extruded tubes with serpentine louvered fins into manifolds
Brazing fixture design

Heat exchanger brazing:

In-house furnace: Face area up to 20" wide by 20" long, any tube depth and manifold option.
Off-site furnace: Face area up to 30" wide x 120" long, 18 and 25.4mm tube depth options, single and double row construction

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Heat exchanger testing:

Hydrostatic testing to 200bar (3000psi)

Note: Some capabilities are outsourced locally when in-house equipment is incapable of performing the desired work, for example, due to size limitation.

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