Local Convective Boiling Heat Transfer And Pressure Drop Of Nanofluid In Narrow Rectangular Channels

Mounir Boudouh (1) , Hasna Louahlia Gualous (1) , Michel de Labachelerie (1)

1 Micro Nano Systems & Science department

This paper reports an experimental study on convective boiling heat transfer of nanofluids and de-ionized water flowing in a multichannels. The test copper plate contains 50 parallel rectangular minichannels of hydraulic diameter 800 μm. Experiments were performed to characterize the local heat transfer coefficients and surface temperature using copper-water nanofluids with very small nanoparticles concentration. Axial distribution of local heat transfer is estimated using a non-intrusive method. Only responses of thermocouples located inside the wall are used to solve inverse heat conduction problem. It is shown that the distribution of the local heat flux, surface temperature, and local heat transfer coefficient are dependent on the axial location and nanoparticles concentration. The local heat transfer coefficients estimated inversely are close to those determined from the correlation of Kandlikar and Balasubramanian [32] for boiling water. It is shown that the local heat flux, local vapor quality, and local heat transfer coefficient increase with copper nanoparticles concentration. The surface temperature is high for de-ionized water and it decreases with copper nanoparticles concentration.

Mots clés: Nanofluid; minichannel; flow boiling; local heat transfer; nanoparticles

Domaines: Thermique [physics.class-ph]; Thermique [physics.class-ph]

Mounir Boudouh, Hasna Louahlia Gualous, Michel de Labachelerie. Local Convective Boiling Heat Transfer And Pressure Drop Of Nanofluid In Narrow Rectangular Channels. Applied Thermal Engineering, 2010, 30 (17-18), pp.2619. ⟨10.1016/j.applthermaleng.2010.06.027⟩. ⟨hal-00678801⟩