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Updated: Jan 28, 2026

Measurements of Local Instantaneous Convective Heat Transfer in a Pipe - Single and Two-phase Flow
Published on: April 30, 2018
Experimental characterization of an n-pentane oscillating heat pipe for waste heat recovery in ventilation systems
Govinda Mahajan1, Scott M Thompson2, Heejin Cho3
1Rheem Manufacturing, 2600 Gunter Park Dr., Montgomery, AL, 36109, USA.
Abstract:
A tubular oscillating heat pipe (OHP), with long form factor and 1 × 0.5 m2 footprint, was experimentally characterized for passive waste heat recovery via air-to-air heat exchange in a typical Heating Ventilation & Air Conditioning (HVAC) ducting system. Experiments were designed to demonstrate the OHP's ability to utilize otherwise wasted thermal energy to pre-heat or pre-cool air for reducing building energy consumption. Results indicate that the OHP is fully-capable of operating while possessing a relatively long form factor (>1 m) and as a forced convection, air-to-air heat exchanger for waste heat recovery in HVAC systems.
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