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Discussion: Some clarifications
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Anonymous |
Some clarifications
Jun 1 2007, 12:09 AM EDT Good article but there are a number of errors There is a factual error in this part describing pumps: "This is the maximum height that a pump can sustain its stated flow rate before it begins losing its capabilities. So, if you see a pump with a max “Head” of, say, 36 inches and it pumps water at 317gph, it will continue to do so unless it had to go beyond that spec." Actually this is false. The rated 317gph will only be achieved at ZERO height and restriction. at 36 inches of water height, there is ZERO flow. the pump is just able to sustain that height of water and will not pump any more. thus flow=zero at max head. the pump gradually loses its max flow as the delivery height(or restriction) increases. Your description of single pass radiators is errornous. the differences in core temperatures are too small to present a significant benefit. a dual pass in general will probably have better performance. water spends more time inside the radiator core than a single pass. some ppl say a single pass has less restriction than a dual pass. oddly enough, some tests have shown that the black ice X-flow (single pass) has the same amount of restriction as the dual pass model. also, independent tests have also shown that in most cases a dual pass rad of the same model beats a single pass. also, single pass or dual pass does not dictate the airflow restriction. thus your statement that "Single pass designs are desirable because you can get good performance with low noise as they don’t require as much pressure to get good airflow through them" is false. Airflow restriction is equally the same with a single pass and dual pass of the same radiator model. single or dual pass only affects the water flow, not airflow. airflow restriction is dictated by the fin density and core thickness. 4 out of 9 found this valuable. Do you? |
 mpilchfamily |
RE: Some clarifications
Jun 1 2007, 12:58 AM EDT If you find an error anywhere then register for free and make the corrections yourself. That's what a Wiki is all about. 1 out of 1 found this valuable. Do you? |