Anyone up to review my brewery design ?

[molc]

Actually, hold on. If you took water out of the boiler, through the counterflow, back into the boiler...it'd take ages for it to cool, as the thermal gradient would drop really quickly. It'd be far quicker to cool on the way from the boiler to the fermenter, right ?

Takes 15mins for 20L to get to groundwater temp on my setup using the recirc technique. The reason I do it is so the wort is not sitting above 80C for a long period of time, with the hops isomorphizing (sic)

[Sorcerers Apprentice]

Sorry for the delay in getting back to your email Bigvalen, but these things are best kicked around on the forum where everyone can share and contribute.
I bought the BCS 460 as I was in Florida for a week in January, I ordered it from BrewersHardware
https://www.brewershardware.com/BCS-Brewery-Controllers/ although The electric Brewery people are now also selling it albeit a bit more expenive, http://www.ebrewsupply.com/bcs-460-temperature-controller/ they also sell a complete control panel. I ordered the unit on the thursday before I left and it arrived to my hotel on the following Tuesday.
It only comes with a 110 volt power supply, I tried it on 230v as some of these power supplies can operate on either, howeve a  slight puff of smoke and a pungent odour soon led me to believe that this would not be the case. I picked up a 220v supply from Maplin as it was on special at the time, I think its either 5v or 6v, I had emailed the suppliers but they don't carry a 230 v option. It needs an Ethernet connection onto your network, so you can use an old wifi router as a bridge or one of those power link wifi/ethernet extenders, which is handy for extending your wifi into the garden if you are using he BCS in your shed.
The BCS uses thermocouples and it is tuned for their particular type of thermocouples, it says that you can use other bands but the BCS first need to be tuned to accept these.
They have some 12" thermocouples on their website at the moment at a knock-down price so I grabbed a few, (12" is a bit long  for thermocouples as they may get damaged when in use thats why I ordered a few plus a 4" one for my RIMs heater)
https://www.brewershardware.com/BCS-NPT-Mounted-Sesnors-with-Fixed-Length-Cables/
You can see that they are reduced to 45 cents each instead of the usual 20 odd dollars, however when you go into the checkout area and change the delivery address to Ireland the postage cost jumps up to $59  I opted to send them to my Shipitto address for the $5 USA shipping charge and have estimated under $10 to ship from there to the emerald isle.
I powered it up and hooked it up to my network and it all worked, the display is nice and clear and it means that I don't have to spend the day in the shed, as I can monitor it from the house during heating up times and stands etc. I believe that the smartphone app is quite expensive for what it does, but I suppose that they don't sell too many, and it works remotely for free on the laptop.
The main deciding factor for me was the data logging ability and the fact that the programme is written in ladder logic, so its easy to programme the inputs and outputs, (and in my case I don't have to learn to programme with Arduino)
Regarding the rest of your brewery design, I would shy away from any hard plumbing, I believe its asking for problems. A few years ago I bought a Jacuzzi bath which was designed to drain dry after use, with all pipework sloping downwards towards the drains,however after a few goes when you switched it on a black algae which looked like tea leaves used to be pumped into the bath, I wouldn't fancy this in my beer. Your pipe runs will all have to be sloped to drain and wont look very nice as everything will be off square. In big breweries the pipe work is always full of a liquid, either sterile water, beer/wort or cleaning chemicals, they are never left empty for anything to develop within them.
Its a lot easier to use silicone hosing, which can be replaced cheaply and is transparent so that you can see any issues developing. One word of caution though, in professional breweries there is a golden rule of never letting any hoses touch the ground. All hoses should be the correct length to facilitate this, and for long runs the hose is supported to keep it up safely. If you are brewing outside the hose could end up in contact with pet/rodent excrement, you end up handling the hose and at a minimum making yourself sick. Make up a few extra dedicated hoses rather than have one long hose to do everything and end up on the floor, during its use for the shorter runs.

[Sorcerers Apprentice]

A quick update, the Shipitto postage charge for the thermocouples was $24 due to the size of the box.
So realistically a downside of the BCS controller is the postage charges from the states.
Edit its better to use the Shipitto Californian address as Brewers hardware is also in California