I cut a small part of the black pipe on the amplifier side (could it be slightly deformed by a try with an other type of adapter ?), with the dedicated tool, changed the adapter and plugged it more firmly in the pipe (pipe deeply inserted in the adapter).
it seems, there is no more leakage.
measured pressure and flow are 0.9 bar and 4.7Lpm => OK without amplifier.
| Ronic Chiche wrote: |
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now, I installed the long pipes (2x 3m) in closed loop (without the amplifier connected), but the exact ones used to connect the laser, with the same pipe adapters.
after the compression process, the chiller works at 0.9 bar and the measured flow is 4.7Lpm.
so, it's still OK !
after a long time, I observed a small leakage on the "male" adapter on the amplifier side.
| Ronic Chiche wrote: |
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I drained the chiller to install again the short pipe (< 1m) in closed loop.
then, I filled again the chiller and did the compression process to obtain 1bar.
in that case, the flow measured by the chiller is correct about 5.8Lpm.
PS : the correct length for the previous calculation is 6m (2x 3m) and not 3m...
in that case, the flow should be ~ 15Lpm (and not 22 Lpm)
| )Ronic Chiche wrote: |
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pipes are maybe too long ?
we can use the Darcy-Weisbach + Blasius laws (non linear laws).
I asked to ChatGPT, Claude, Mistral and MathGPT to solve it with these parameters :
L ~ 3m
D = 1 cm
water at 20°C
dP = 0.7 bar
they all found ~ 22-23L/min
so, the tube length should not be the problem... to be investiguated.
| Ronic Chiche wrote: |
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now, I connected the chiller circuit to the amplifier, thanks to the adapters.
chiller IN => blue pipe => laser OUT
chiller OUT => black pipe => laser IN
after several filling and compression procedure, the flow is only 1.7Lpm and the pressure is 0.8 bar.
the temperature has been set to 20°C according to the manual operating range 18-23°C.
the flow is too low !
according to the manual, the flow should be 3-5Lpm !
a very small leakage appears if the mechanical constrains on the pipe is too high.
so, I separated the IN and OUT pipes to release this constrain and fixed the pipes to keep the position.
| Ronic Chiche wrote: |
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we have all the adaptor plugs for connecting the chiller.
so, I tested first the chiller connected in closed loop (on itself).
there is no manual, so procedure is not completely clear...
DO NOT PLUG ANYTHING BEFORE THE CHILLER ASK FOR IT
ONE MUST FOLLOW THE PROCEDURE ON THE CHILLER DISPLAY
1) if the chiller circuit is full of coolant liquid,
one must start by a System Startup -> Draining
(a trash tank and the hose will be need for emptying the circuit)
2) once the chiller circuit is empty
one must continue by System Startup -> Filling
(a clean demineralized water tank and the hose will be need for filling the circuit)
=> OK !
the chiller is able the fill and drain its circuit.
I saw the cooling water circulating in the closed loop.
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