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).
Sankey diagram illustrating the heat distribution and energy losses for a 6-cylinder FXI engine.
| Identifier | ExFiles\Box 69\4\ scan0362 | |
| Date | 17th October 1927 | |
| HEAT DISTRIBUTION In 6. CYL FXI ENGINE. 8/1 COMPn RATIO. DIRECT DRIVE. ENG. DEVELOPING 286 B.H.P. FULL THROTTLE 2250 R.P.M. SPECIFIC HEAT OF OIL 0.52. TOTAL OIL CIRCULATION THROUGH BEARINGS 33 lbs/MIN UNDER A PRESSURE OF 74 lbs/sq in TOTAL OIL CIRCULATION THROUGH COOLER 42 lbs/MIN CYLINDER WATER OUTLET TEMP 80°C. TOTAL AREA REPRESENTS INITIAL FUEL ENERGY 36200 B.T.U.s/M.{Mr Moon / Mr Moore} = 100% HEAT INPUT TO OIL. HEAT PICKED UP FROM HOT PISTONS. 207 B.T.U.s/M.{Mr Moon / Mr Moore} HEAT SUPPLIED DUE TO FRICTION ETC. 498 B.T.U.s/M.{Mr Moon / Mr Moore} THIS ALSO REPRESENTS THE RATE OF HEAT DISSIPATION NECESSARY TO MAINTAIN A STEADY TEMPERATURE UNDER THESE PARTICULAR CONDITIONS OF TEST. THE AMOUNT OF THIS IT IS NECESSARY FOR THE COOLER TO DISSIPATE DEPENDS UPON THE COOLING OF THE CRANKCASE. HEAT CARRIED AWAY BY OIL. 705 B.T.U.s/M.{Mr Moon / Mr Moore} TOTAL FRICTION AND PUMPING LOSSES 1840 B.T.U.s/M.{Mr Moon / Mr Moore} TOTAL HT GIVEN TO WATER 5367 B.T.U.s/M.{Mr Moon / Mr Moore} EFFECTIVE MOTOR POWER. 12000 B.T.U.s/MIN. 33.2% EXHAUST & RADIATION. 17231 B.T.U.s/M.{Mr Moon / Mr Moore} 47.6% RADIATION FROM PISTONS HEAT CARRIED AWAY BY OIL 207 B.T.U.s/M.{Mr Moon / Mr Moore} .57% PISTON FRICTION ACCOUNTED FOR IN WATER 445 B.T.U.s/M.{Mr Moon / Mr Moore} 1.23% RADIATION PUMPING ETC 2.46% BEARING FRICTION ETC. HEAT CARRIED AWAY BY OIL 498 B.T.U.s/M.{Mr Moon / Mr Moore} 1.35% | ||