Heat Pipes versus Coil Pump systems - Sponsored Whitepaper

An increasingly common technical strategy used in the commercial and industrial sectors to provide enhanced dehumidification is an air-to-air heat exchanger wrapped around a cooling coil. The cooling coil may be DX, chilled water, or brine. Because it's exposed to a higher dry bulb temperature, the upstream heat exchanger will absorb BTU's off the downstream heat exchanger into the lower temperature air. Because these systems reduce the Sensible Heat Ratio (SHR) of the equipment to more closely match the SHR of the load, it is well understood that these psychometrics are very desirable, and the ASHRAE Standard 90.1 allow this type of reheat. Even better, using wrap around systems such as these save not only the reheat energy, but also save the amount of cooling energy. While the heat pipe is by far the most common heat exchanger used for this application, occasionally a coil pump around system is also considered to save capital costs.