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 experiments on a superheat system with data on boiler performance and throttle heating.
| Identifier | WestWitteringFiles\P\2July1926-September1926\ Scan014 | |
| Date | 5th July 1926 guessed | |
| contd :- -5- 2000 R.P.M. full throttle. | Boiler feed hole. | Water flow through into boiler lbs/min. | B.T.U's/min. added. | % of heat added to total heat flow under these conditions. | | Full bore. | 5.87 | 496 | 11% | | .046 dia. | .18 | 111 | 24% | | .025 dia. | --- | --- | --- | With the small feed hole of .025 dia. we could detect no increase of temperature of the condensing water in the calorimiter which indicated that the carburetter, under these particular conditions, absorbed the same amount of heat as put in by the boiler; a very desirable feature. It has been questioned what would be the effect of a stopped feed pipe to the boiler. A test showed that the action is the same as with a small feed hole up to the maximum temp. after which the water evaporating and hot spot cools down due to all the boiler water evaporating and then condensing and cooling in the hot spot. We can here summarise the conclusions arrived at from the preceding experiments :- The superheat system of throttle heating seems to present no difficulty except that it has the disadvantage of being slower in its initial warming up than the present standard system. There seems no reason why this should be an inherent difficulty of the system and we are seeking to reduce the thermal contd :- | ||