Effects of length scale, subcooling, and dissolved gas content on the pool boiling critical heat flux of cylindrical heaters

An experimental study is performed to investigate the critical heat nux (CHF) of wires in various thermodynamic states of FC-72. It is well known that the system temperature greatly affects nucleate boiling and CHF performance. When the system temperature is below saturation for a given system pressure, the thermodynamic state is either pure-subcooled or gas-saturated depending on the dissolved gas concentration within the liquid. The effects on CHF are investigated parametrically as a function of length scale, subcooling, and dissolved gas content. A single correlation accommodating these effects is suggested to predict CHF for small cylinders.