We are looking for people to help us implement these plans. Food, accommodation and fun provided, read more here.

20210404_174347_HDR.jpg

Automation Plans

A short description of what the next projects will be, in order of importance

20 wings, 10-15 rooms each.

Ventilation and temperature control in corridors and room.

Luckily we don't have to do it all at once, but some have to work quite soon

A 1200 KW boiler system

9 machine rooms like this on the left

2-4 Ventilation machines per room.

Many pumps, temperature control valves and lots of sensors

A long term project

Rooms and Corridor

Corridors are between 15 and 60m long with 8-15 rooms. the current system is all on or off, so to get better control we will have to replace the old.As was done in the 80's the roofs were lowered and all pipes and cables were hidden. We have started to take those roofs away as seen below.

20210404_174717.jpg

We usually put a heat pump at the end (or both for long ones) and use a single duct to distribute heat (and later fresh air).

The black holes are where new ventilation will go. Two fans, one blowing in and one out is the idea. We want those both temperature and (later) CO2 controlled.

The idea is to have one Rasperry Pi per wing, or two for long ones, with one PC 12/5v power supply. Each fan, and later light, would be controlled by it's own little micro-controller, for which we print the housing using our 3d printer (with dyson design?).

Later we want to add temperature sensors and mc-controlled electric heating for the heaters we already have.

Even later we add control for the water radiators, and a display and controls for users.

And even later motion based lighting in the corridors.

Current questions

- which controller

- wired or not, and which wireless

- fan size and brand

Currently i am leaning towards a PI pico for the main reason that i like it. It's much faster and cheaper than arduino and has that well designed and turbo fast PIO. The only real alternative is espXX.

Which then is the same question as wired or not. So i ordered both and will test. Probably use both in different areas. In the corridors the wiring is still or (linear), but elsewhere maybe not. Also the wireless removes the possibility of electric shocks, nice. I was looking at meshes and am not sure about esp-now vs zigbee.

I also bought many fans, from 80-140mm, both 3 and 4 wire (4 for pwm) and plan to test for noise. The maths says 80mm already provides enough air.

Future additions

Next up would be temperature control in the rooms. First a (wireless) switch for the electric heaters we use during autumn.

Then a display with user temperature control which would effect the fan and also the electric heater.

Then a electrically controlled radiator. And somewhere in there a CO2 sensor in each room.

We will probably buy new (modern/efficient) ventilation machines for each floor and have them co2 driven.

We are looking for people to help us implement these plans. Food, accommodation and fun provided, read more here.

Boiler

So last year we ripped out 4 old oil boilers and installed this monster, a 1,2MW woodchip burner. Complete with 2 silios and 2 feeders.

20210405_124632.jpg

The whole system has about 7 motors (fans, feeds..) and 10 sensors. We had bought it used with the electronics on the left, which is not only old but we don't know it well enough to change, so we pay an "expert". It annoyingly "almost" works, but then has weird failures, so we have to keep a close eye on it.

Controlling motors should not be too difficult, especially since we have the drivers and relays ready there in the box. All we need is a Pi, a display and a controller per motor. Here i was thinking of esp32, to get electric decoupling and a web interface, possibly home-automation.

While this project is not the main priority, it would be really really nice to have. So we are making some tests before the summer and will make the go/nogo decision around midsummer.

We are looking for people to help us implement these plans. Food, accommodation and fun provided, read more here.

Machine rooms

The machine rooms, all 9 of them, were installed in a big technical renovation in the 90's, along with the current automation system, that is so expensive we can't even afford a professional to have a look (let alone adapt). The ventilation and heating systems are built to be always on (with 2 truck sized generators for back up, because it was a hospital).

20210404_174347_HDR.jpg

W

There are three elements in these rooms: ventilation machines, heating pumps and automation.

The ventilation in some of some smaller rooms may be re-purposed, or refitted with new control. Especially in side-wings where one machine does one wing (in the main house each machine does parts of all floors).

Current questions

- which controller

- wired or not

- fan size and brand

Currently i am leaning towards a PI pico for the main reason that i like it. It's much faster and cheaper than arduino and has that well designed and turbo fast PIO. The only real alternative is espXX.

Which then is the same question as wired or not. So i ordered both and will test. Probably use both in different areas. In the corridors the wiring is still or (linear), but elsewhere maybe not. Also the wireless removes the possibility of electric shocks, nice.

I also bought many fans, from 80-140mm, both 3 and 4 wire (4 for pwm) and plan to test for noise. The maths says 80mm already provides enough air.

Machine rooms

The machine rooms, all 9 of them, were installed in a big technical renovation in the 90's, along with the current automation system, that is so expensive we can't even afford a professional to have a look (let alone adapt). The ventilation and heating systems are built to be always on (with 2 truck sized generators for back up, because it was a hospital).

20210404_174347_HDR.jpg

W

There are three elements in these rooms: ventilation machines, heating pumps and automation.

The ventilation in some of some smaller rooms may be re-purposed, or refitted with new control. Especially in side-wings where one machine does one wing (in the main house each machine does parts of all floors).

Ventialtion

There are basically 2 kinds of ventilation systems, the main house and others. The others usually do just one wing per machine and can possibly be used as is, with new automation That would mean some Pi for the logic and sensors and a motor controller for the fans.

The main buildings ventilation does not work per wing, but each machine(pair) does 1/2 of a wing but in 4 floors. This is completely unusable for use (we use wings at a time) and may be automated to pump warm air into the house in the spring (ie heating). For this we would have to have temperature sensors in each floor and outside and a little relais.

Both of these are not very important, the second even less so.

Heating

We are installing heat pumps and use electric to avoid using the main heating system as long as possible as that has huge losses.

All pumps are on once we get towards zero, and then we run the pipe temperature at the minimum possible that lets us heat rooms.

So currently there is not much need, though in the long run we do want to control all pumps and collect all temperature data. The main thing to control is actually the three way valves. Since this involves collecting data from around the house, so wiring the house, it is not on the priority list.

We are looking for people to help us implement these plans. Food, accommodation and fun provided, read more here.