Resurrection of a CFEI 100 KVA Induction Furnace

The Craftmans Shop > New from Old

<< < (40/171) > >>

awemawson:
I'm rather going off bore hole pumps and their complications :(

Turns out that DAB Jet 102M pumps will self prime sitting on the surface with a suction pipe down 9 metres and deliver the flow I need. 9 metres is more than I need so my inclination is to go that way with an above surface pump and above surface controller that integrates with the pump motor.

That solution just seems easier and safer somehow. In the mean time I've ordered 100 metres of 32 mm MDPE pipe to get the water into and out of the heat exchanger, and a whole clutch of the necessary plumbing fittings.

awemawson:
Phil that is an interesting series of exchanges on that link you quoted. It was when I found the need to shroud the bore hole pump to keep it cooled when not installed in a narrow pipe that I thought that things were getting over complicated and looked harder for a suitable self priming pump.

. . . we'll see soon if it indeed CAN prime and draw from the quoted depth :med:

awemawson:
So I have a JET 102M self priming pump, control box, and 100 metres of 32 mm MDPE pipe on order along with numerous fittings - so while waiting for them I've started dismantling the defunct refrigerated chiller to rescue various things such as it's reserve tank and Grundfos pump. The case I will probably scrap, or possibly cut down into a smaller unit to re-house the tank, Grundfos pump and new heat exchanger. The jury is out on that decision at the moment.

However to sort my ideas out and make sure I've not forgotten anything I have re-worked the 'overview' diagram, as it gets a bit complicated what is fed from where - don't want anything overlooked while trenches are open !

russ57:
It seems like it shouldn't be an issue, but could you return the well water to the well? The sheer mass of the well ought to be able to keep the temperature rise under control, and there is no chance of pumping exceeding the supply rate.

-Russ

awemawson:
Russ I had considered that but decided against on simplicity grounds - pipe length is about the same as I'll be using a roof gully that's about 20 metres away - I had considered running the waste water down the gutter of the welding shop roof to save 20 metres of pipe but that just seems crude !

So the task this afternoon has been to dismantle the old water chiller unit - no major complications except that it must have been assembled on a stand in the factory, as everything is fixed with nuts and bolts to the base and there is barely enough room to get a hand under. In the end I jacked up one side to gain access only to find that the tank wasn't quite empty and I was pouring loads of grubby water on the floor :bang:

Having spent an hour with an old towel mopping up round all the obstructions what is left can (I think) be left to evaporate - well over a gallon mopped up!

So I now have the Grundfos CH4-60 pump out and this will definitely be reused. I have the insulated nylon cold tank removed, that is crammed with refrigerator gubbins all of which should remove quite easily - this I probably will reuse.

The main casing is huge - I need 'something' to house the Grundfos pump, tank, and the heat exchanger along with a three phase contactor and a few water valves, filters and connections - cutting it down may be more trouble than it is worth, but I may well reuse for instance its corner upright members to create a somewhat more compact unit.

The upper part of the cabinet still holds the original temperature controller and its contactors, and also two huge slabs of cooling radiators and a big three phase extractor fan - these all will need removing tomorrow.

Navigation

 Message Index

Go to full version