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).
Report page detailing tests on engine heating systems, focusing on heat transfer to jacket water and absorption by the charge.
| Identifier | ExFiles\Box 66\2\ scan0158 | |
| Date | 2nd February 1926 guessed | |
| contd :- -13- by the other systems, though probably not in proportion to the temperatures shown. It follows therefore from curve No.3. - showing the temperature rise of the heating medium - and in which the maximum temperature reached is not greatly different to the full load conditions, that for the standard system the increase of heat input with time must be more rapid than given by the other two. HEAT ADDED TO THE JACKET WATER AND HEAT ABSORBED BY CHARGE. If the heat supplied to the boiler by the exhaust gas with the superheated system, is greater than that absorbed by the charge then the difference will be added to the normal heat supplied to the jacket water. It was under conditions of full load that we made the following tests to determine these values. The method adopted was that of measuring the water passing through the hot spot system and observing the over-all temperature rise between the inlet to the boiler and the outlet from the hot spot. This method could only be used when the water flow was sufficient to keep the outlet temperature below boiling. The following curves show the results obtained at the various speeds. However the water flow in this particular case was considerably greater, approximate 33 times greater at 1000 r.p.m. xx than that xxx which gave us the quickest heating from cold - it was therefore necessary to employ another method to see if the heat flow increased when the flow was decreased to the value which gave us our maximum rate of temp. rise on starting from cold. contd :- | ||