Originally Posted by cpachris
I expressed my admiration for Martin's efforts in a previous post, so I'm glad you agree with me on that. But you can have admiration for the efforts and dedication of someone, and at the same time use your own brain to interpret the results he brings us. By equalizing pumping power for rads that have very different levels of restrictiveness, the test will favor less restrictive rads. If you instead equalized flow rate, the test would favor more restrictive rads. Either way you chose to test, it would favor a certain group of rads. There is really almost no way around getting some skewing of the results. Martin chose a method that he believes represents the most "real world" scenario. And it probably does...for most people. But for those on OCN that have two strong pumps, the testing method won't show how well a restrictive rad could perform. My guess is Martin would agree.
The way I see it, you can't control flow in a loop. You can change your blocks, pumps, rads and whatever but, still, you can't control your flow. Which means that the logic way to test it is to assume a certain pumping power and see how different rads fare. Sure, one could argue that it ain't fair that this rad gets lower flow than the others but, in reality, it will ALWAYS be like that, because its a lot more restrictive than the others.
It is what it is
Originally Posted by Martinm210
Wow, just wanted to stop by and say howdy all and thanks for all the kind comments. For what it's worth, while my flow meter reading capability failed, using the pressure drop curves I would estimate my flow rate on any of the radiators was never much below 1.3GPM or higher than 1.6GPM. I purposely used a fixed pumping condition so the flow rates could vary as I feel that's behaving more similarly to the real world than fixing a single flow rate. Also fixing a single flow rate if anything in my opinion skews the results toward the higher restriction radiator and more artificial than real world. If 1.3GPM is a flow rate inadequate for any heat exchange component (block or radiator), that is too bad on the design side.
As with anyone that doesn't like a particular test...opinions are worthless without the data to back it up and I invite anyone to share something constructive. Put up (As in get off your moldy rear and start testing and sharing). Opinions are a worthless waste of cyberspace..
No my testing is not absolute or perfect and yes you too can contribute something for others to review and criticize. If you choose to complain without sharing some of your own work for sake of comparison, then you have not put on your big boy panties..
Some go straight from Huggies to Depends and never step up and share..
Hey Martin, good to see you around
I remember that I asked some time ago about how water flow affects radiator performance and was shown this graphs (was told by Vapor that they are yours):
Any chance you still have the whole article to look into it?
Or could you explain this a little more?
Originally Posted by YOUDFDO
I tune it for block effeincy . There is only 1 right way.
You do it wrong, then. The more flow you have, the better. Of course, there is a point in which the pumps (which dump more heat the more flow they produce) dump more heat than the gains you get from such flow increase, but there is no tuning to do, as flow never hurts.
Originally Posted by YOUDFDO
Heres what it really comes down to . lets use serial pumps vs parr. Serials pumps create zero extra pressure and zero extra flow . but you have redundancy. If I want redundancy I will create it in the system I will not run 2 pumps in serial . If you have a pressure drop or flow stoppage use an alarm . easly set up with pressure guages . Most preferr flow gauges and well they should . I preferr a pressure guage once I know the flow of a loop I can check pressure and use that from that point on. Point is people debate this all the time . It is the dumbest PC water cooling debate of all time.
You are just proving once and again how limited your knowledge is.
1) Serial pumps: when the pumps are in serial, you get DOUBLE pressure. This means that you will get some added flow as a consequence, but the max flow is probably the same as if you were running 1 pump and had a 0 restriction loop.
2) Parallel pumps: you get DOUBLE max flow. The problem is that given our loops that are fairly restrictive the gains might not be that good (if any) and thus why its better to run the pumps in serial.
In both cases, you get redundancy.
Another great article from Martin