Packless water-source coaxial heat exchangers operate efficiently as either refrigerant condensers or refrigerant evaporators when transferring heat with water. This makes them an ideal choice for both water-source heat pumps (WSHP) and water-cooled condenser applications.

The coaxial heat exchangers are available with Packless advanced Green Surface heat transfer technology for improved efficiency and energy savings. Standard sizes are available for ¹⁄₂ through 60 ton systems. Packless can also manufacture custom heat exchangers to meet your needs.

Packless heat exchangers are C-UL-US listed per the UL-207 standard and manufactured in our ISO 9001:2015 certified plant. Maximum rated working pressures are 500 psig on the water side and 650 psig on the refrigerant side.

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The coaxial convoluted hose design of Packless heat exchangers.

Packless heat exchangers utilize a coaxial convoluted hose design. Water flows through the inner hose while refrigerant flows in the annulus between the inner and outer hoses.

The key to the high performance of Packless heat exchangers lies in the convoluted multi-lead inner hose manufactured in a patented process. The resulting convoluted hose has increased heat transfer surface area per unit length and permits full flow of both water and refrigerant around its entire periphery for improved performance.

Turbulence imparted by the convolutions to both the water and refrigerant flows further enhances the thermal performance, while inhibiting the accumulation of deposits on the surfaces. The net result is an effective and compact heat exchanger with superior anti-fouling characteristics.

Optimum heat transfer with Packless water-source heat exchangers is achieved with a counterflow arrangement of water and refrigerant during condensing.

Standard sizes are available in space saving shapes for nominal ¹⁄₂ through 60 ton systems. Higher capacities are available upon request. Standard models are available with either copper or 90/10 cupronickel inner hoses surrounded by steel outer tubes. Copper inner hoses are recommended for fresh water and cooling tower applications while cupronickel is recommended for ground source and marine applications.

For non-standard applications, Packless can manufacture heat exchangers with different capacities, mounting brackets, hose materials, and fittings. Tell us what you need and our engineers will assist in making it happen.