[Amps] SS amps watercooling

[Jim Thomson]

##  A T stat  in an eng rad just speeds up getting the eng up to temp.  Once 
the 190 deg F
T stat open up, its outa the circuit.  My 2010 mustang normally sits at aprx 
205 F for eng coolant.
Low speed eng fan kicks in at 206 F..drops out at 196 F.   The high speed 
thresholds  are a bit higher.
I can program them to whatever I want.

##  For folks that have increased  GPM rate from typ 4 gpm, to as high as 55 
gpm, on supercharger setups,
see  no decrease at all, maybe 1-2 degs F max, on their IATs.....= 
manifold   Intake  Air Temps.

##  I have a PD blower on mine.  Waste of effort trying to increase GPM rate 
through the loop.
Doesnt work,  u just end up circulating hot water faster through the loop.

##  Loop consists of an intercooler, which is just a small rad, sandwiched 
between discharge
side of the blower, and the al  intake manifold.  Al manifold sits at 200F 
at all times,  since its bolted to the
AL heads, which is bolted to the AL eng block.     Block, heads, manifold, 
all sit at 200F.

##  water routed through intercooler rad is routed to the de-gas 1 gal 
bottle,  ( in the top, out the bottom),
to get rid of any air in the loop, and allow for expansion, etc.   Then 
routed   to  IC pump,, mine is 4 gpm.
>From output of IC pump, then routed to bottom of the massive  18"  tall x 
21"  wide  HE.   Comes out the
opposite corner of the HE, on top, then back to the IC rad, completing 
the..closed  loop.

##  Increase the  GPM rate, and coolant is in and out of the HE so fast, it 
doesnt get a chance to get cooled
by the air flowing through the HE.   Hence its a waste of effort.   With 
slower GPM rates, the coolant exiting
the top of the HE is indeed cooler, BUT it also then has to flow through the 
IC at a slower rate.  Slower rate
through the coolant through the IC means  the IC gets hot.   Too slow, and 
it ends up boiling before it exits
the IC..which is not what you want.

##  On the other hand, if you have an unlimited supply of cold water, like 
say a swimming pool, and  pump
cold water through the IC at a fast rate, like say 20 gpm, then discharge it 
into the drain, and do it all with
1 inch OD hosing, the  IC  will extract heat like crazy from the hot air 
coming out of the blower.

##  we measured all of this over the last 5 years.  What does work is super 
thick HEs, like the  3.125  inch thick
variety,  and loads of air through em, with unrestricted top and bottom 
grilles on the front of the car,
and also ducted hoods, to facilitate even more heat extraction.   The 
function of the IC is to extract heat from the
200-300 F  discharge air from the blower.  Function of the HE is to dump 
that extracted heat back to the ambient air.

##  Its a precise juggling act  for car stuff.   But  5000  BTU is 
manageable on  a SS  water cooled amp.  If the pump failed, or
any loss of water flow from a leak, etc,  and you would require overheat 
protection, like asap, but that is no big issue.
or some kind of water flow  monitoring, and  or   coolant temps before and 
after the SS  RF deck section.   What would make
noise is the fan on the external  rad.  But even the rad and fan and pump 
can be remoted else where.

Jim   VE7RF



-----Original Message----- 
From: Gary Schafer
Sent: Thursday, February 16, 2017 11:53 AM
To: 'Jim Thomson' ; amps at contesting.com
Subject: RE: [Amps] SS amps watercooling



Heat transfer is determined by amount of flow and temperature difference.
Slowing the flow does not increase heat transfer.

There is an old myth that having a thermostat in a car will make it run
cooler because the heated water stays in the radiator longer..

73
Gary  K4FMX

> ##  Ideally what you want is for the flow rate to be FAST through the
> heat sink and RF  deck,  to extract heat, but SLOW
> through the rad...to dump heat.     But its all one big loop, so you are
> screwed.   Only fix is a big rad, and lotsa air on the rad.
> Other wise you will just be circulating hot water.   Think of how long
> it takes to boil just  2 litres of water in a standard
> 1500 W  CCS  kettle  in your kitchen...2-3 mins max.   And you cant use
> vapour phase cooling with SS devices, too hot at 100 deg C.
>
> ##  Im sure water cooling can indeed be done with SS, but it would all
> have to be sized very carefully.
>
> Jim   VE7RF
>
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