This study experimentally investigates the effect of circuitry on the refrigerant-side pressure drops of plate finned tube evaporators. Experiments were performed with countercross, parallel-cross, and z-shape arrangements. The results showed that the parallel-cross-flow circuit gives a lower pressure drop than other arrangements. Generally, the refrigerant-side pressure drops increase with air frontal velocities. However, for and parallel flow, the pressure drops decrease with increase of air frontal velocity. This unusual characteristic is most likely related to the flow pattern transition when subjected to heat addition.
Influence of Circuitry Arrangement on the Pressure Drops of Two-Row Finned Tube Evaporators
Contributed by the Advanced Energy Systems Division and presented in part at the International Mechanical Engineering Congress and Exposition, the Winter Annual Meeting of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS, Nashville, Tennessee, November 14–19, 1999. Manuscript received by the AES Division, November 15, 1999; revised manuscript received November 6, 2000. Associate Editor: J. L. Smith.
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Wang , C., Liu , M., and Leu , J. (November 6, 2000). "Influence of Circuitry Arrangement on the Pressure Drops of Two-Row Finned Tube Evaporators ." ASME. J. Energy Resour. Technol. March 2001; 123(1): 100–103. https://doi.org/10.1115/1.1348271
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