2nd pump location

[koooowweeee]

You know more flow doesn't mean cooler temps. If your flow is slow the water will be in the rad longer. So the water coming out of the rad will be colder.

If the flow isn't really slow it's not going to make much odds

 

[Distracted]

I don't mind slow flow, nor fast. Ideally I'll be able to adjust the flow as required but at the moment the loop is so restrictive that there is little flow at all.

I think it is down to the QDCs as I've said, but I have a spare DDC so I fancy adding that anyway while I replace the QDCs.

 

[Jokester]

You know more flow doesn't mean cooler temps. If your flow is slow the water will be in the rad longer. So the water coming out of the rad will be colder.

If the flow isn't really slow it's not going to make much odds

Higher flow rate does mean lower temperatures (fundamentally due to turbulent flow reducing the thermal gradient at the surfaces of water blocks and inside radiators), but it is a law of diminishing returns and you must also take account of the extra heat dump from a second pump.

Ultimately the radiator is always full of water!

As long as you’re more than about 1 gallon per minute there’s no practical benefit in increasing flow rates though as you quickly get into the realms of decreasing temperatures by tenths of degrees.

 

[koooowweeee]

Higher flow rate does mean lower temperatures (fundamentally due to turbulent flow reducing the thermal gradient at the surfaces of water blocks and inside radiators), but it is a law of diminishing returns and you must also take account of the extra heat dump from a second pump.

Ultimately the radiator is always full of water!

As long as you’re more than about 1 gallon per minute there’s no practical benefit in increasing flow rates though as you quickly get into the realms of decreasing temperatures by tenths of degrees.

I didn't want to get technical was more of the point that flow isn't to important as long as it's not a drip

 

[Smffy]

I didn't want to get technical was more of the point that flow isn't to important as long as it's not a drip

Plus in completely non tech terms if the water is in the rads longer it’s also in the blocks longer getting toasty and allowing component temp to build. Either way flow is good for cooling... mostly it all evens out as pointed out above!

 

[koooowweeee]

Plus in completely non tech terms if the water is in the rads longer it’s also in the blocks longer getting toasty and allowing component temp to build. Either way flow is good for cooling... mostly it all evens out as pointed out above!

Talking about 2 things at once is technical