Abstract
This paper presents the investigation of the pressure drop in headers and development of correlation for pressure loss coefficient for single phase flow through round cylindrical headers of parallel MCHXs. The working fluid was compressed air flowing through header with 1-20 m s-1 based on smallest cross section while the velocity through microchannels was in the range 6-30 m s-1. The experimental results indicate that the pressure loss coefficient of inlet header is a linear function of the ratio of velocities through microchannel tube and header, except for the first two microchannel tubes; the pressure loss coefficient of outlet header is a quadratic function of the ratio of velocities through microchannel tube and header, and decreases as the velocities through upstream microchannel tubes increase. Correlations for predicting pressure drop of inlet header and outlet header are developed and agreement for 98% of experimental data is within a ±15 Pa.
Original language | English (US) |
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Pages (from-to) | 119-134 |
Number of pages | 16 |
Journal | International Journal of Refrigeration |
Volume | 49 |
DOIs | |
State | Published - Jan 2015 |
Keywords
- Correlation
- Header
- Pressure drop
- Single phase
ASJC Scopus subject areas
- Building and Construction
- Mechanical Engineering