Paper presented to the 1st International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Kruger Park, 8-10 July 2002.
This paper reports on the condensation heat transfer
and pressure drop performance of a heat pump water
heater operating with R-22 at an average saturation
temperature of 40°C with mass fluxes ranging from 300
- 800kg/m2s. The purpose of the experimental work
was to validate the effectiveness of a computerized data
acquisition system, as well as to establish a sound
experimental procedure. Experimental flow regimes
were determined using a well-known flow regime
predictor. This showed that the experimental data
points lay mainly in the annular flow region. The
experimental heat transfer coefficients and pressure
drops were compared with widely used correlations,
and good agreement was obtained.