Thermal Science 2017 Volume 21, Issue 1 Part A, Pages: 223-232
https://doi.org/10.2298/TSCI140521024B
Full text ( 3621 KB)
Cited by
Experimental investigation of convective boiling in mini-channels: Cooling application of the proton exchange membrane fuel cells
Boudouh Mounir (University of Batna, LESEI Laboratory, Batna, Algeria + FEMTO-ST Institute, Micro Nano Systems & Science department, CNRS-UMR, UTBM, Belfort, France)
Si Ameur Mohamed (University of Batna, LESEI Laboratory, Batna, Algeria)
Louahlia-Gualous Hasna (FEMTO-ST Institute, Micro Nano Systems & Science department, CNRS-UMR UTBM, Belfort, France)
An experimental study of convective boiling heat transfer of water flowing in
minichannels at low flow rate is carried out with pure de-ionised water and
copper-water nanofluids. A low concentration of copper nanometer-sized
particles was used to enhance the boiling heat transfer. The aim is to
characterize the surface temperature as well as to estimate the local heat
transfer coefficients by using the inverse heat conduction problem IHCP. The
inlet water temperature is fixed at 60°C and mass fluxes operated in range of
212-573 kg/m².s in minichannels of dimensions 500×2000 μm². The maximum heat
flux investigated in the tests is limited to 7000 W/m². The results show that
the surface temperature and the local heat transfer coefficient are dependent
on the axial location and the adding of copper nanoparticles can
significantly improve the heat transfer.
Keywords: Two-phase flow, cooling, boiling, local heat transfer coefficient, nano-fluid.