Thoughts of the day! (food for thought)

[Rotary-Motion]

hi peoples

just been day dreaming away as usual, and this came to me, sometimes i get these wierd things going on, a mad prase enters me head but means a shed load...

this one:- ya know when ya getting old, if ya take ya glasses off ya blind - lol 

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drop ya thoughts in no matter how trivial sounding...

to think is to invent   

[therecklessengineer]

I'm still working on some sort of cooling valve for the Lister.

The belt and braces approach would be a three way motorised valve driven by a microcontroller. An automotive 3 way thermostat would also work - but finding one is difficult.

[Tony]

I think RM's been at the herb again 

For the Listy, it sounds like this is the kind of application that requires simplicity for reliability.  Obviously there's not much to go wrong with a car thermostat (with a few additional bypass holes drilled in it) whereas a valve controlled by a PIC has potentially many more modes of failure.

[Dickjotec]

I'm still working on some sort of cooling valve for the Lister.

The belt and braces approach would be a three way motorised valve driven by a microcontroller. An automotive 3 way thermostat would also work - but finding one is difficult.

What are you trying to achieve? If.
You want to leave it running un attended for long periods keep it very simple and fail safe. Overheating will not do it any good.

[Rotary-Motion]

herbs? whats that then, they go on pizzas dont they?

but 3 way valves are on central heating systems i believe



http://www.ebay.co.uk/itm/CENTRAL-HEATING-SPARE-PART-3-PORT-MOTOR-VALVE-TOWER-HONEYWELL-TYPE-5-WIRE-UNIT-/230781029195?pt=UK_DIY_Materials_Plumbing_MJ&hash=item35bb9f0b4b

[julianf]

What are you trying to achieve? If.
You want to leave it running un attended for long periods keep it very simple and fail safe. Overheating will not do it any good.

Dick,

Am i right in remembering that you thermosyphon yours to a tank in the shed, and then pump from that to the house?
Do you have a heat exchanger between the two or is the same water in the radiators in the house the stuff thats in the lister head?  Im thinking probably not, due to the height difference?


Also...

Did anyone ever worry about rust on these things?  The thermosyphoned tank generally seems pretty 'airy' so im wondering about oxygen transfer into the water jacket.

[therecklessengineer]

You want to leave it running un attended for long periods keep it very simple and fail safe. Overheating will not do it any good.

Yes, you're right Dick. Wax type thermostat it is!

[Dickjotec]

What are you trying to achieve? If.
You want to leave it running un attended for long periods keep it very simple and fail safe. Overheating will not do it any good.

Dick,

Am i right in remembering that you thermosyphon yours to a tank in the shed, and then pump from that to the house?
Do you have a heat exchanger between the two or is the same water in the radiators in the house the stuff thats in the lister head?  Im thinking probably not, due to the height difference?


Also...

Did anyone ever worry about rust on these things?  The thermosyphoned tank generally seems pretty 'airy' so im wondering about oxygen transfer into the water jacket.

I pump the water from the tank through the radiators in the house but they are dedicated radiators. The Rayburn has its own set. Height difference is not a problem as the tank is next to the Lister and there is no pressure on the head only on the pumps.
I have had no rust problems in the lister though the cooling tanks rust. I use a ch additive to help reduce problems. I considered a he system but this works.

Reckless I have no stat in mine and as I run it daily it does not cool down much so does not take long to get back up to temp. Lister did not fit 'stats to the CS and used a large cooling tank.

[therecklessengineer]

Here's what I've got in mind for mine.

[attachment deleted by admin]

[therecklessengineer]

Didn't label it, but that valve with the squiggle is a PRV to ensure circulation if all the heat consumer valves are shut.