Air conditioning in buildings that house moisture sensitive products like libraries, museums, and supermarkets etc. needs strict control of humidity. The sensible heat ratio in many such applications tend to be low and energy intensive conventional means of humidity control using electrical/gas fired heaters is not finding favor with designers and ASHRAE. Various alternative ways to avoid reheating include Desiccant Rotor System, Plate to Plate Heat Exchanger, Glycol based run around coil, Heat Pipe based Heat Exchanger (HPHE) etc. This paper presents the development of a U- shaped HPHE starting from fabrication of heat pipes to their assembly in tube fin type heat exchanger.
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