Packless water-source condenser coils operate very effectively 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 coils are available with Packless Green Surface technology for improved efficiency and energy savings. Standard sizes are available for ½ through 30 ton systems. In addition to the standard products Packless can also customize the coils for individual needs.
Packless coils are C-UL-US listed and manufactured in an ISO 9001:2008 certified plant. Maximum rated working pressures are 500 psig on the water side and 650 psig on the refrigerant side.
Packless coils utilize a coaxial "tube-in-tube" design. Water flows through the inner tube while refrigerant flows in the annulus between the inner and outer tubes.
The key to the high performance of Packless coils lies in the convoluted multi-lead inner tube manufactured in a patented process. The resulting convoluted tube has increased heat transfer surface area per unit length yet still 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 a highly effective, compact heat exchanger with superior anti-fouling characteristics.
Optimum heat transfer with Packless water-source condenser coils 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 30 ton systems. Higher tonnages are available upon request. Standard models are available with either copper or 90/10 cupronickel inner tubes surrounded by steel outer tubes (shells). Copper inner tubes are recommended for fresh and cooling tower water applications while cupronickel is recommended for ground and sea water applications.
For non-standard applications, Packless coils can be obtained on a special order basis with copper shells instead of steel, or with different capacities, shapes, mounting brackets, and refrigerant fittings. Tell us what you need and our engineers will assist in making it happen.