Rolls-Royce Archives
         « Prev  Box Series  Next »        

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).
Analyzing the thermal efficiency and heat losses of a Hispano engine.

Identifier  ExFiles\Box 22\1\  Scan193
Date  22th September 1924
  
R.R. 405A (20H) (D.A. 652 20-3-24) J.H.H.
EXPERIMENTAL REPORT. Expl. 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 dis-
tribution 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.
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙