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).
Analysing the thermal efficiency and heat losses of the Hispano engine.
| Identifier | ExFiles\Box 38\2\ Scan249 | |
| Date | 22th September 1924 | |
| R.R. 498A (Roll) (D.A. 612 20-9-24) J.H.D. EXPERIMENTAL REPORT. Exptl. No. REF:Hs{Lord Ernest Hives - Chair}/ACL/LG22.9.24. THERMAL EFFICIENCY AND HEAT LOSSES OF HISPANO ENGINE. The following is an analysis of the heat losses for the Hispano engine. An 'energy diagram' is given showing the heat distribution express as a percentage of the initial fuel energy. ---------------------------------------------------------------------- R.P.M. | H.P. | Heat supplied. | Th. eqvt. wk. done. | Friction. | Ht. to jacket water. ---------------------------------------------------------------------- 500 | 25.6 | 5200 | 1085 | 127 | 1250 ---------------------------------------------------------------------- 1000 | 56.2 | 10600 | 2385 | 445 | 1740 ---------------------------------------------------------------------- 1500 | 87.5 | 15500 | 3710 | 805 | 2235 ---------------------------------------------------------------------- 2000 | 109.0| 18800 | 4620 | 1186 | 2640 ---------------------------------------------------------------------- 2500 | 114.5| 20450 | 4850 | 1653 | -- ---------------------------------------------------------------------- Heat losses expressed as %age of heat supplied. -------------------------------------------------- R.P.M. | Work done. | Heat to jacket water. | Friction. -------------------------------------------------- 500 | 21 | 24.1 | 2.45 -------------------------------------------------- 1000 | 22.5 | 16.4 | 4.2 -------------------------------------------------- 1500 | 23.9 | 14.4 | 5.2 -------------------------------------------------- 2000 | 24.6 | 14.0 | 6.3 -------------------------------------------------- 2500 | 23.7 | -- | 8.1 -------------------------------------------------- Hs{Lord Ernest Hives - Chair}/ACL. | ||