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).
Laboratory report comparing the cooling efficiency of water versus ethylene glycol.
| Identifier | ExFiles\Box 151\3\ scan0104 | |
| Date | 22th August 1929 | |
| X1435 Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} H11/E.J.W.22.8.29. Laboratory. RE. ETHYLENE GLYCOL. As suggested we have fitted up the jacketed induction pipe and carried out tests with a view to comparing the efficiency of water and ethylene glycol. The conclusion drawn is that the relative efficiency of the two fluids depends on the temperature of the partition between the heated space and the cooling fluid. With the average temperature of the partition above 100°C. the ethylene glycol extracts the heat more readily, whereas with the partition at or below 100°C. the water is more efficient. It would be impossible to estimate the actual values without fitting up a much more elaborate apparatus. H1. HE | ||