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Danger Den MAZE4 Intro Kit - English |
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martes, 20 de marzo de 2007 |
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Página 13 de 14
The Pump
Our flow and pressure measurements were close to those stated by Danger Den: 2.3M maximum head and 540 liters per hour.
As we said before, the type of water block we are testing depends more on the flow than on the high pressure. So let us see what happens if we reduce the water flow as much as possible. To do this, a fan regulator was connected to the pump in order to reduce the speed more than 60%.
Our first idea here was to show a chart, but now we do not think it is necessary since the difference in performance was almost imperceptible. The flow was considerably less with the new work conditions but the temperature did not vary proportionally with them and thus, it is possible to make a similar analysis to the one made to the radiator: If we intalled a second water block with the same characteristics, the flow decrease that this would produce should not affect the general performance notoriously. Definitely, this is another point in favor of all we have been observing so far
The pump’s RPM readings, however, were totally different and variable. Danger Den is conscious of this small inconvenient and is currently working on the solution. It is important to emphasize that this has no external effect. In fact, the pump’s RPM readings are not essential, as they would only give the user a reference value that is hard to compare with the circulating flow.
We have left to the end some tests with the water block that were run apart from the rest of the kit’s components. For that, we dismounted the kit completely and installed only a large capacity reservoir, in which it is possible to control the water temperature.
From the said reservoir, the pump sucks the water to the block and then it goes back to the reservoir. Periodic measurements were taken while running the same bench, since it is quite simple to calculate the Delta T between the water and the processor when the water temperature at the pump’s inlet is known. This gave us a more complete idea of this particular block’s performance, without having to depend on the rest of the kit’s components. In addition, the test was run with three different pumps: the one that was included in the kit, a Swiftech pump, and a Regent 2000 pump for aquarium filters (220V; 1.8M; 1500l/h).
Contrary to suspicion, the 12VDC pump with less flow rate achieved better results, while the two 12VDC pumps achieved quite similar ones. The 220V pump was the best in performance. Needless to say, its high water flow capability was the key factor. It is important to say that there is a similar temperature rate among the pumps. If we take into consideration the diversity among them, both in maximum flow and maximum pressure, then we can say that the water block is very flexible, when it is time to choose the right pump it is going to work with.
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