DIY-HP-LED
Well-Known Member
Brushless Motor DC Pumps
I'm a big fan of brushless DC motors when it comes to pumps, here's why they are so dependable, have such a long lifetime and are a good choice for cooling grow lights.
Here I have a small fountain pump disassembled, you'll notice that the pump impeller and the rotor for the brushless electric motor are one piece, it rotates inside a sealed plastic winding housing and is lubricated and cooled by a thin film of water, only one moving part. The $12 CDN ebay circulating pump on the right works the same way and pumps a high volume to over 10 feet of head height. I'm using two of these pumps in a common reservoir each with it's own chiller, one for each lamp in the flower room.
Pumps are as dependable as fans, cost less and you don't need as many, I could have used a single 12 volt circulating pump to cool the entire flower room lamp system if I wished, since it moves more than enough water.
Selling Water
Did I mention ...
Air takes up 829 times more volume and has about 4 times less heat capacity than water.
829 x 4 = 3,316 times more air needed than water for the same cooling.
Water is an order of magnitude better for cooling than air.
I'm a big fan of brushless DC motors when it comes to pumps, here's why they are so dependable, have such a long lifetime and are a good choice for cooling grow lights.
Here I have a small fountain pump disassembled, you'll notice that the pump impeller and the rotor for the brushless electric motor are one piece, it rotates inside a sealed plastic winding housing and is lubricated and cooled by a thin film of water, only one moving part. The $12 CDN ebay circulating pump on the right works the same way and pumps a high volume to over 10 feet of head height. I'm using two of these pumps in a common reservoir each with it's own chiller, one for each lamp in the flower room.
Pumps are as dependable as fans, cost less and you don't need as many, I could have used a single 12 volt circulating pump to cool the entire flower room lamp system if I wished, since it moves more than enough water.
Selling Water
Did I mention ...
Air takes up 829 times more volume and has about 4 times less heat capacity than water.
829 x 4 = 3,316 times more air needed than water for the same cooling.
Water is an order of magnitude better for cooling than air.
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