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Heat Exchanger Coolant Tank
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<blockquote data-quote="zredfire04" data-source="post: 15627778" data-attributes="member: 184817"><p>i lifted this from an engineering forum, so not my words but 100% correct. this is from a discussion on the myth of coolant moving too fast through an engine/radiator</p><p></p><p>"Let's assume that the amount of heat that you need to remove from the engine is a constant, say 50,000 BTU/hr.</p><p></p><p>If the cooling through the engine is say 5 gpm, that gives you a temperature rise through the engine. Using water properties(to simiplify the math), that works out to a 20 degree rise.</p><p></p><p>Now, if we double the water flow rate to 10 gpm, the temperature rise is only 10 degrees. This affects two things. If we also assume the inlet water temperature is a constant, this increases the temperature difference between the coolant and the engine. It also greatly increases the heat transfer because the film coefficient of the water is increased (or the film resistance is reduced)."</p><p></p><p>so yeah, there are physics involved.</p><p></p><p>my assertion regarding the volume of water in the system stands since more water can hold more heat than less water. the point i was aiming for is that if the heat exchanger can't bring the coolant down to ambient temp during a WOT run, more water is better as it will take more heat energy to raise the average temp of the water in the system.</p></blockquote><p></p>
[QUOTE="zredfire04, post: 15627778, member: 184817"] i lifted this from an engineering forum, so not my words but 100% correct. this is from a discussion on the myth of coolant moving too fast through an engine/radiator "Let's assume that the amount of heat that you need to remove from the engine is a constant, say 50,000 BTU/hr. If the cooling through the engine is say 5 gpm, that gives you a temperature rise through the engine. Using water properties(to simiplify the math), that works out to a 20 degree rise. Now, if we double the water flow rate to 10 gpm, the temperature rise is only 10 degrees. This affects two things. If we also assume the inlet water temperature is a constant, this increases the temperature difference between the coolant and the engine. It also greatly increases the heat transfer because the film coefficient of the water is increased (or the film resistance is reduced)." so yeah, there are physics involved. my assertion regarding the volume of water in the system stands since more water can hold more heat than less water. the point i was aiming for is that if the heat exchanger can't bring the coolant down to ambient temp during a WOT run, more water is better as it will take more heat energy to raise the average temp of the water in the system. [/QUOTE]
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