Air-Side Thermal Performance of Micro-Channel Heat Exchangers Under Dehumidifying Conditions
Year: 2000
Type: conference-paper
Abstract: An experimental study for air-side thennal-hydraulic performance of brazed aluminum heat exchangers under dehumidifYing conditions has been performed.For 30 samples of louvered fin heat exchangers with different geometrical parameters, the heat transfer and pressure drop characteristics for wet surface were evaluated.The test was conducted for air-side Reynolds number in the range of 80-300 and tube-side water flow rate of 320kg/h.The dryand wet-bulb temperatures of the inlet air for heat exchangers were 27°C and 19°C, respectively and the inlet water temperature was 6°C.The air-side thennal performance data for cooling and dehumidifYing conditions were analyzed using effectiveness-NTU method for cross-flow heat exchanger with both fluids unmixed.The test results were reported, compared with those for the dry surface heat exchangers, in terms of sensible j-factor and friction factor f, as functions of Reynolds number based on louver pitch.The correlations for j and f factors are developed within rms errors of 16.9 and 13.6 %, respectively.
Authors: M. H. Kim, C.W. Bullard
Institution: Purdue University West Lafayette
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1481568831