Studies have been made for the critical heat flux (CHF) during natural convective boiling on uniformly heated vertical tubes submerged in saturated liquids. By adopting a mixed flow model in tube, a generalized approx...Studies have been made for the critical heat flux (CHF) during natural convective boiling on uniformly heated vertical tubes submerged in saturated liquids. By adopting a mixed flow model in tube, a generalized approximate formula was set up which was found to agree well with the CHF data of tubes and annular tubes submerged in water or other liquids undervarious pressure conditions.展开更多
A superhydrophilic heat transfer surface was formed by a special nano-material coating process. The enhanced heat transfer characteristics and enhanced heat transfer mechanism of water jet boiling on the superhydrophi...A superhydrophilic heat transfer surface was formed by a special nano-material coating process. The enhanced heat transfer characteristics and enhanced heat transfer mechanism of water jet boiling on the superhydrophilic surface was investigated and the jet boiling characteristics on the superhydrophilic surface was compared with those on the common metal heat transfer surface. The quantitative effects of flow condition, heating mode, heating condition and superhydrophilic coating process on critical heat flux (CHF) were studied and enhanced heat transfer characteristics in the nucleate boiling regime were confirmed. The heat transfer characteristics of jet boiling on the superhydrophilic surface were summarized with semi-theoretical, semi-empirical correlations.展开更多
文摘Studies have been made for the critical heat flux (CHF) during natural convective boiling on uniformly heated vertical tubes submerged in saturated liquids. By adopting a mixed flow model in tube, a generalized approximate formula was set up which was found to agree well with the CHF data of tubes and annular tubes submerged in water or other liquids undervarious pressure conditions.
文摘A superhydrophilic heat transfer surface was formed by a special nano-material coating process. The enhanced heat transfer characteristics and enhanced heat transfer mechanism of water jet boiling on the superhydrophilic surface was investigated and the jet boiling characteristics on the superhydrophilic surface was compared with those on the common metal heat transfer surface. The quantitative effects of flow condition, heating mode, heating condition and superhydrophilic coating process on critical heat flux (CHF) were studied and enhanced heat transfer characteristics in the nucleate boiling regime were confirmed. The heat transfer characteristics of jet boiling on the superhydrophilic surface were summarized with semi-theoretical, semi-empirical correlations.