HEAT TRANSFER IN SATURATED BOILING

Journal Article · Fri Jan 01 04:00:00 EST 1960 · Chem. Eng. Progr.

OSTI ID:4056219

Chang, Y; Snyder, N W

Heat transfer by boiling liquid from a horizontal surface is described. The presence of vapor bubbles contributes three effects to the heat transfer: destruction of the wave motion adherent to natural convection; increase of the effective thermal conductivity due to the eddy motion, or agitation effect; and change of specific heat capacity due to change of phase, or latent heat effect. The agitation effect is assumed to extend to the whole regime of nucleate boiling; whereas the latent heat effect starts to become significant only when the condition corresponding to the peak heat flux is approached. Six-dimensional parameters are found from the equations of momentum and energy. An equivalent thermal diffusivity of boiling liquid is defined and correlated from these six parameters. A general equation of heat transfer coefficient is obtained in both convection and nucleate boiling. Peak heat flux and its corresponding temperature difference are determined according to the mechanism of agitation and latent heat transport. Calculated results agree well with test data of previous investigators for dependence on both temperature and pressure. (auth)

• Research Organization: Univ. of Notre Dame, Ind.
• NSA Number: NSA-15-023635
• OSTI ID: 4056219
• Journal Information: Chem. Eng. Progr., Journal Name: Chem. Eng. Progr. Vol. Vol: 56: Symposium Ser. No. 30
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BOILING
BUBBLES
CONFIGURATION
CONVECTION
EFFICIENCY
ENERGY
ENGINEERING AND EQUIPMENT
HEAT TRANSFER
HEATING
LIQUIDS
MOMENTUM
MOTION
NUCLEATE BOILING
PERFORMANCE
PRESSURE
QUANTUM MECHANICS
SATURATION
SOLUTIONS
SPECIFIC HEAT
STANDARDS
SURFACES
TEMPERATURE
THERMAL CONDUCTIVITY
THERMAL DIFFUSION
THERMODYNAMICS
TURBULENCE
VAPORS
VARIATIONS
WAVE MECHANICS