There is a significant decrease in flow boiling CHF when the inertial force of fluid not large enough microgravity, but this tendency decreases with increase force. In present study, critical heat flux (CHF) subcooled at different gravity levels on smooth silicon surfaces was investigated. The working FC-72, subcooling 15 K. transfer characteristics, including CHF, wall temperatures and bubble ...

Critical heat flux (CHF) was measured and examined with high-speed video for subcooled flow boiling in micro-channel heat sinks using HFE 7100 as working fluid. High subcooling was achieved by pre-cooling the working fluid using a secondary low-temperature refrigeration system. The high subcooling greatly reduced both bubble departure diameter and void fraction, and precluded flow pattern trans...

Even though two-phase heat transfer of refrigerants in minichannel sinks has been studied extensively, there is still a demand for improvements overall thermal performance miniature exchangers. Experimental investigation and sophisticated calculations with respect to devices are needed. In this work, time-dependent experimental study subcooled boiling was carried out FC-72 flow sink, comprising...

Fouling is a common, fundamental and costly problem in heat transfer systems, which reduces thermal efficiency of equipment, increases the energy loss and causes strong damage to the heat transfer equipment in various industries. The main causes of fouling on the heat transfer surfaces are salts with inverse temperature-solubility in the fluid which calcium sulfate is one of the most important ...

We conducted experimental research using high-porosity sintered fiber attached on the surface, as a passive method to increase heat flux for subcooled flow boiling. Two different porous thicknesses (1 and 0.5 mm) one bare surface (0 were compared under three inlet subcooling temperatures (30, 50 70 K) low mass (150–600 kg·m−2·s−1) deionized water working fluid atmospheric pressure. The test sec...

Water–copper is one of the most common combinations working fluid and heating surface in high-performance cooling systems. Copper usually selected for its high thermal conductivity water heat transfer coefficient, especially two-phase regime. However, copper tends to suffer oxidation presence thus flux performance affected. In this research, an experimental investigation was conducted using a c...