プール沸騰CHFに及ぼす伝熱面材質の影響

抄録

Saturated pool boiling experiments were carried out to explore the wall material effect on the critical heat flux (CHF). It was found that the CHF value is higher for the wall material of higher thermal conductivity. To develop a mechanistic model to describe the present experimental results, it was postulated that the CHF condition is reached when the local wall temperature in the dry area formed beneath the nucleation bubble exceeds the critical value and the temperature rise is mitigated for the high thermal conductivity wall since the heat dissipation from the dry area to the surrounding area is pronounced. It was shown that the present model well describes the experimental results obtained in this work.