Rolls-Royce Archives
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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Chart showing the rate of heat transmission from liquid to metal for different fluids and tube sizes.

Identifier  ExFiles\Box 149a\2\  scan0306
Date  1st November 1930
  
CHART L/421.G
RATE OF HEAT TRANSMISSION FROM LIQUID TO METAL
TUBE DIA = 5/16" O.D 24.G. 70/30 BRASS
LIQUID VELOCITY = 3.75 FT/SEC

B.T.US/SEC/°F T.D./FT²/COOLING SURFACE = .0231K/D (KCρ/η)^.455 (vDρ/η)^.8
WHERE K=THERMAL CONDUCTIVITY
Cρ = SP.{Mr Spinney} HEAT
ρ = DENSITY
v = LIQUID VELOCITY
D = PIPE BORE
η = ν/ρ WHERE
ν = ABSOLUTE VISCOSITY

Y-Axis: COEFFICIENT OF HEAT TRANSFER B.T.US/HR/SQ FT/°F TEMP DIFF
X-Axis: LIQUID TEMP °F

Graph Lines & Annotations:
FROM EQN ABOVE
WATER (5/16 TUBE)
WATER (3/4 TUBE)
NO END EFFECTS
FROM PAPER INSTn MECHm ENGrs NOV 1930 (EAGLE FERGUSON)
EXPERIMENTAL WORKS [faint text]
HEAT FLOW DERIVED FROM TRIAL 421
ETHYLENE GLYCOL
  
  


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