Experimental study was carried out of heat transfer of the Gas Carrying Evaportion with fluidized solid particles in a vertical annulus. The annulus consists of an electrical heating bar and an outer glass tube. Air w...Experimental study was carried out of heat transfer of the Gas Carrying Evaportion with fluidized solid particles in a vertical annulus. The annulus consists of an electrical heating bar and an outer glass tube. Air was adopted as the carrying gas. Water and aqueous solutions of carboxyl methyl cellulose were used as the working liquids. Solid particles were ceramic beads and glass beads of different diameter. The experimental results showed that the liquid flow boiling heat transfer was increased and the superheat of liquid at heating surface lowered remarkably by the introduction of the carrying gas and the fluidized solid pericles. The heat transfer augmentation became weaker as the liquid viscosity icreased.Experimental data of the heat transfer were correlated.展开更多
Experimental study was carried out of liquid flow boiling heat transfer with fluidizedsolid particles in a vertical annulus. Water and aqueous solutions of carboxy methyl cellulosewere used as the working fluids. Soli...Experimental study was carried out of liquid flow boiling heat transfer with fluidizedsolid particles in a vertical annulus. Water and aqueous solutions of carboxy methyl cellulosewere used as the working fluids. Solid particles were glass beads of different diameter. Theexperimental results showed that the liquid flow boiling heat transfer was much increasedand the superheat of liquid at heating surface was lowered remarkably by the introductionof the fluidized solid particles. Experimental data were correlated and an empirical equationfor the heat transfer of the three phase flow boiling was obtained.展开更多
The convection and microlayer evaporation heat transfer contributions to boiling heat transfer outside a horizontal tube bundle were distinguished by limiting difussion current technique and heat transfer measurements...The convection and microlayer evaporation heat transfer contributions to boiling heat transfer outside a horizontal tube bundle were distinguished by limiting difussion current technique and heat transfer measurements simultaneously.The experimental results show that convection and microlayer evaporation heat transfer coefficients outside a tube bundle increase with increasing heat flux.The enhanced heat transfer increases with decreaseing heat flux.The higher tubes positioned,the higher the contributions of microlayer evaporation and convection to boiling heat transfer outside a tube bundle were.展开更多
文摘Experimental study was carried out of heat transfer of the Gas Carrying Evaportion with fluidized solid particles in a vertical annulus. The annulus consists of an electrical heating bar and an outer glass tube. Air was adopted as the carrying gas. Water and aqueous solutions of carboxyl methyl cellulose were used as the working liquids. Solid particles were ceramic beads and glass beads of different diameter. The experimental results showed that the liquid flow boiling heat transfer was increased and the superheat of liquid at heating surface lowered remarkably by the introduction of the carrying gas and the fluidized solid pericles. The heat transfer augmentation became weaker as the liquid viscosity icreased.Experimental data of the heat transfer were correlated.
文摘Experimental study was carried out of liquid flow boiling heat transfer with fluidizedsolid particles in a vertical annulus. Water and aqueous solutions of carboxy methyl cellulosewere used as the working fluids. Solid particles were glass beads of different diameter. Theexperimental results showed that the liquid flow boiling heat transfer was much increasedand the superheat of liquid at heating surface was lowered remarkably by the introductionof the fluidized solid particles. Experimental data were correlated and an empirical equationfor the heat transfer of the three phase flow boiling was obtained.
文摘The convection and microlayer evaporation heat transfer contributions to boiling heat transfer outside a horizontal tube bundle were distinguished by limiting difussion current technique and heat transfer measurements simultaneously.The experimental results show that convection and microlayer evaporation heat transfer coefficients outside a tube bundle increase with increasing heat flux.The enhanced heat transfer increases with decreaseing heat flux.The higher tubes positioned,the higher the contributions of microlayer evaporation and convection to boiling heat transfer outside a tube bundle were.
