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).
Test results for engine cooling system components, including radiator calibration and condenser performance.
| Identifier | ExFiles\Box 179b\2\ img236 | |
| Date | 19th December 1932 | |
| -3- Re/Bib.1/MT.19.12.32. Cont'd.{John DeLooze - Company Secretary} (3) Plain condenser. Quantity of condensate collected over 3 mins. (4) Finned condenser. Quantity of condensate collected over 3 mins. (5) Methods of returning condensate back to the main water system. TEST RESULTS. (1) Calibration of Radiator Without Blanking. Using 100% Water and 30 & 50% Ethylene Glycol. The engine was run for 30 mins. for each condition at 2500 R.P.M. 590 BHP. Curve (1) shews the results of these tests. It will be seen that there is a slightly higher temperature as the percentage of Glycol is increased also the air temp. rise through the radiator tubes is higher. This would indicate a slowing up of the flow of coolant through the radiator on account of the higher viscosity of the Glycol. In the above results are contradictory to previous tests this will be the subject for further investigation. (2) Amount of Blanking Required on Radiator to make water Boil. The area to be blanked off in order to make the water boil was dependant on the air temperature. It was found that for a day temp. of plus 4°C. the Radiator had to be blanked off 62%, and for a 3° variation 7.65% more or less blanking is required accordingly. (3) Plain Condenser Fitted in the System & Tests to Measure the Condensate Flow. Before these tests a vapour separation test was carried out on the header tank to prove its suitability at the high R.P.M. The tank proved to be satisfactory under these conditions. The method of checking the condensate flow was to use only one pipe for the steam delivery to the condenser and the other pipe was led to a vessel. The engine was run until all temperatures were stabilised and then the condensate flow was checked, over a period of three minutes. (4) Finned Condenser Fitted in the System & Tests to Measure the Condensate Flow. Similar tests were carried out as for (3) and below are the comparative results. | ||