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Other demands include cost, weight, reliability, and durability of the cooling system itself. Conductive heat transfer is proportional to the temperature difference between materials. If engine metal is at 250 °C and the air is at 20 °C, then there is a 230 °C temperature difference for cooling.
Proper engine coolant and a pressurized coolant system obviate these shortcomings of water. With proper antifreeze, a wide temperature range can be tolerated by the engine coolant, such as −34 °F (−37 °C) to +265 °F (129 °C) for 50% (by volume) propylene glycol diluted with distilled water and a 15 psi pressurized coolant system.
A coolant is a substance, typically liquid, that is used to reduce or regulate the temperature of a system. An ideal coolant has high thermal capacity, low viscosity, is low-cost, non-toxic, chemically inert and neither causes nor promotes corrosion of the cooling system. Some applications also require the coolant to be an electrical insulator.
Also, at centre far-right: cylindrical oil cooler (water jacket cut away) with coiled copper oil pipe, and cut-off coolant hose below it. Maybach HL210 P45, originally fitted in Tiger 131 . [ 65 ] Note the right-angle shape of the cam followers, with rollers bearing on the camshaft lobes (partially visible just above the two leftmost inlet ...
A hand-held refractometer is the industrial standard used to determine the mix ratio of water-soluble coolants [5] that estimates oil concentration from the sample refractive index measured in the Brix scale. The refractometer allows for in situ measurements of oil concentration within industrial plants.
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