Abstract
The results of pool boiling experiments with synthetic (CVD) diamond and silicon carbide (SiC) heaters are presented for water as boiling liquid. The diamond and SiC heaters varied considerably in thermal conductivity, but they had smooth, nearly identical surfaces, also in regard to their contact angles for water. Temperature sensors and electric heating wires were directly vapor-deposited underneath the surfaces. The experiments were carried out with comparable large heaters (15mm × 15mm) for pure water under atmospheric pressure (1bar) in a pool boiling cell. The heat transfer characteristics including the corresponding boiling curves were obtained. In a prior work, it was found that the influence of the thermophysical wall properties might be substantial in case of special heater geometries leading to trapped bubbles, but no significant differences between both materials were observed in case of conventional heater configurations.
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