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).
Analysis of condenser temperature-capacity curves under varying thermal conditions.
| Identifier | WestWitteringFiles\K\October1923\ Scan100 | |
| Date | 29th October 1923 | |
| Contd. -6- EFC3/T29.10.23. but to be quite a lot raised if the condenser is taken through a cycle of temperature, taking it up to 70°C, or so, after which cycle there is a tendency for the curve for the atmospheric range gradually to fall. Or put in another way, corresponding to any steady atmospheric temperature at which the condenser is maintained there is a temperature-capacity curve for the atmospheric range towards which the condition of the condenser will tend and which is higher for higher temperatures, and this explains why it is not possible to get readings of capacity at different temperatures from day to day on a consistent curve. If the condenser temperature by momentarily (relatively) taken up high, the curve for the atmospheric range is bodily raised and will subsequently lower itself gradually, while the condenser is kept at atmospheric temperature. It would appear that if a condenser were subsequently maintained at freezing point, the curve for the atmospheric range would be brought back again more quickly, and taken lower than normal. It would appear that if the capacity of a condenser at 18°C, after having been maintained at that temperature for a considerable time, were approximately at the lower limit viz. .275 (the higher limit being .325) the capacity under all circumstances will fall reasonably well between these limits at 18°C and those at 45°C, as | ||