Overall Heat Transfer Coefficient Values. Table 42 gives approximate values for the heat transfer coefficient for several fluids that might be used to cool the mold and its molten contents. H 2 convection heat coefficient on side 2 in wm2c.
Slack wax slack wax mix. Solvent cold slack wax mix. Typical overall heat transfer coefficients u values air cooled exchangers process fluid u wm2 k water 300 450 light organics 300 700 heavy organics 50 150 gases 50 300 condensing hydrocarbons 300 600 immersed coils coil pool u wm2 k natural circulation steam dilute aqueouos solutions 500 1000.
200 500.
H 1 convection heat coefficient on side 1 in wm2c. λ material thermal conductivity in wmc. Solvent ammonia chiller. 1 u 1 α i 1 α o s λ f i f o fi inner fouling factor m 2 kw fo outer fouling factor m 2 kw u overall heat transfer coefficient wm 2 k s tube wall thickness m λ thermal conductivity of the tube material wm k.