Pro/Forums - View Single Post - How much pump is enough? How much is too much?

Cathar · 12-10-2004, 09:43 PM

Did a heat-dump test on the RD-30. It's heat dump into the loop is actually fairly high, despite being a magnetic armature design. This is supported in that the casing barely gets warm.

Basically measured that around 83% of the pump's power draw gets passed into the water during in-line use.

Pump was measured to draw 28.1W. Calculated heat dump was 23.2W, with around an estimated 10% margin of error on that value.

Plugging that back in to the maths of the first two posts, this works out to:

+20.7C => Iwaki RD-30 @ 18.0v
+20.8C => 2 x Swiftech MCP600 @ 13.8v (series)
+20.9C => Swiftech MCP600 @ 13.8v
+21.1C => Iwaki MD-20RZ @ 60Hz
+21.1C => 2 x Swiftech MCP600 @ 12.0v (series)
+21.2C => Iwaki MD-20RZ @ 50Hz
+21.4C => Swiftech MCP600 @ 12.0v
+21.4C => 2 x Eheim 1048 (series)
+21.5C => Iwaki MD-15R @ 60Hz
+21.6C => Swiftech MCP650 @ 12.0v
+21.6C => Iwaki MD-30RZ @ 50Hz
+21.7C => Iwaki MD-30RZ @ 60Hz
+21.9C => Eheim 1250
+22.3C => Eheim 1048
+23.3C => Eheim 1046

12-10-2004, 09:43 PM	#182
Cathar Thermophile Join Date: Sep 2002 Location: Melbourne, Australia Posts: 2,538	Did a heat-dump test on the RD-30. It's heat dump into the loop is actually fairly high, despite being a magnetic armature design. This is supported in that the casing barely gets warm. Basically measured that around 83% of the pump's power draw gets passed into the water during in-line use. Pump was measured to draw 28.1W. Calculated heat dump was 23.2W, with around an estimated 10% margin of error on that value. Plugging that back in to the maths of the first two posts, this works out to: +20.7C => Iwaki RD-30 @ 18.0v +20.8C => 2 x Swiftech MCP600 @ 13.8v (series) +20.9C => Swiftech MCP600 @ 13.8v +21.1C => Iwaki MD-20RZ @ 60Hz +21.1C => 2 x Swiftech MCP600 @ 12.0v (series) +21.2C => Iwaki MD-20RZ @ 50Hz +21.4C => Swiftech MCP600 @ 12.0v +21.4C => 2 x Eheim 1048 (series) +21.5C => Iwaki MD-15R @ 60Hz +21.6C => Swiftech MCP650 @ 12.0v +21.6C => Iwaki MD-30RZ @ 50Hz +21.7C => Iwaki MD-30RZ @ 60Hz +21.9C => Eheim 1250 +22.3C => Eheim 1048 +23.3C => Eheim 1046 Last edited by Cathar; 12-10-2004 at 09:49 PM.