SteamyTea

I don't think there is a 1Wire sensor that goes that high, more usual to use a thermocouple, and then you are into ADC and extra hardware. I don't understand software, but I think that with Python, it is normal to write little scripts that spew out just the information you want either to a file or a display. Our mate Ed Davies is the Python man, may be worth giving him a shout by email. You get the sensor number by initially interrogating it from the terminal. Everything in Linux is a file, so it shows up as a file. /sys/bus/1w/devices Bit of a faff initially, but easier than writing something to automatically find it. There is OWFS that I think connects the DS18b20 via the USB port and does a lot of the hard work. I think TerryE knows about these. The DS18b20 are, when working at the extreme ends of there temp scale i.e over about 70°C a bit flakey, so you need to keep an eye on that and reject false readings. To give you an idea, I have some stuck in the ground and out of 87750 readings, 40 are false. Not bad, but that is working within the normal range i.e. 0°C to 30°C.

Just goes to show that oversizing really does help to keep the CoP high. 330 m2 is larger than the 6 houses that make up my street. You must have one of the posh houses in you village. Had the weather for getting a decent CoP, been dry and not silly cold.

If you are not bothered about logging the temperatures, how about ones of these: https://www.ebay.co.uk/itm/Inside-Outdoor-Home-Electronic-Hygrometer-Thermometer-Precision-Tester-x-1/174205919478 But if you really want to use a PC to display it on, then SSH (connect) to the RPi with PuTTY (the software on the PC). Your code on the RPi will look something like this: #!/usr/bin/python #imports necessary libaries import os, time, datetime #load drivers os.system('modprobe w1-gpio') os.system('modprobe w1-therm') while True: #Sort out the time format dt = datetime.datetime.now() runday = dt.day dt.day == runday #sensor 1 tfile = open("/sys/bus/w1/devices/28-030697945754/w1_slave") text1 = tfile.read() tfile.close() temperature_data1 = text1.split()[-1] temperature1 = float(temperature_data1[2:]) temperature1 = temperature1 / 1000 #opens and reads the time ts = time.time() #sets time to UTC and dd/mm/yyyy hh:mm:ss format UTC = datetime.datetime.utcfromtimestamp(ts).strftime('%d/%m/%Y %H:%M:%S') logfile = '/home/pi/monitoring/data/temperatures/1wire-%s-%s-%s.csv' % (dt.day, dt.month, dt.year) #creates and opens or appends data to file tfile = open(logfile, "a") #writes to data file tfile.write("%s"%UTC + ",%s"%temperature1 + '\n') #closes data file tfile.close print (temperature1) #sleeps for (n) seconds until next reading time.sleep(29) The "28-030697945754" is the sensor number and will have to be changed to whatever sensor number you need.

That is a ridiculously low CoP.

That is quiet an impressive CoP. How much oversized is your ASHP?

I don't understand the differences. Generally as ASHP will run with a CoP of 2.8. So 31 kWh/m2.year X 190m2 = 5893 kWh/year 5893 [kWh/year] / 2.8 [CoP] = 2104 kWh/year (this is the electricity consumption for the same thermal output) It is kWh, not KwH, or KWH, or kwh, or kw/h

If you have enough height, you could add a few inches of floor insulation, then underfloor heating pipework, then a couple of inches of concrete floor (exact sizes would need to be established later). Then you can connect any type of boiler you like. Alternatively, you could go for forced air heating via duct work, which may be able to be fitted in the roof, or even externally. Again, the choice of heating is up to you as it will all go via a water to air heat exchange in the duct work. There are also relatively cheap air to air heat pumps that may work. You may notice that I don't mention traditional radiators, that is because they are a pain in a workshop. My choice of heat source would be an air source heat pump. But if money is tight, and you can get decent insulation and airtightness levels, storage heaters are cheap to install, and not that bad to run on Economy 7/10 (or whatever time dependant tariff will come along in the future)

Thank you.

Got to be an hour well spent. Only a case of flipping the circuit breakers on everything except the PV. And then spending the rest of the night resetting anything that does not auto rest.

Sounds like the power factor is confusing the CT. Can you look at your main meter and see if it is really drawing current at night. 150W would soon show up at 1 flash of the LED for every Wh. Time for new white goods then. My fridge uses next to nothing.

The ply is only the former, the strength/waterproofing is from the GRP. Any tank would need burying in reality as the ground is used to take the sideways loads. The area is under 30m2 so should come in at £700. I don't think there is a 50 quid option on this.

If it was designed as cube, you could use GRP sheathed and joined ply. I would think that would come out reasonably priced.

Have you checked the systemd Unit file to make sure that it has Restart=on-abort

Depending on the ground, you may find that there is a vegetation line that quite predominant. Have a look on Google Earth, may have to look at some of the older images to get the season right. You are in an ideal position for a wind turbine, and you have enough room to put up a 2 MW one in your paddock, a few hundred tonnes of concrete would cure the boggy ground as well.

Our Ed is building an A Frame place. https://edavies.me.uk/2008/11/house/

Don't they use radioactive isotopes for tracing this sort of thing. https://en.wikipedia.org/wiki/Radioactive_tracer

Only looked at the first image. Good luck getting planning permission to build in that location. I wonder how well they would perform in a typical UK town where there is a house every 10 metres.

Only uses 200 KwH/year.

Does it say how it works, I could not get the video to play.

While I agree in principle with reduction. With batteries the overall efficiencies losses may be less that the equivalent losses in bulk generation. It could be that loosing 20% on the battery round robin is still better that running a CCGT at 80% of design capacity. At the end of the day it is all about carbon dioxide reduction, not energy reduction. That message sometimes get lost in the white heat of technology.

Just noticed this bit of ivy in my garden. Never seen any around here before. So may nurture it for a few years. Then kill it. I do have about 7 self sown, wind blown echiums, so that will be nice. They usually cost a couple if quid down here. 20 quid upcountry. Sitting out the front in the evening sun, it is very nice.

Welcome. What part of Essex. Rural or Wickford?

Well only if you put it in the house. Nothing to stop it being elsewhere and running insulated pipework into the house. But agree with not really worth it as ASHP are so good now. And easier to buy.

Regarding keeping sound in sink, I keep my kitchen radio on FM. All the others on DAB. That way, I have 4 seconds to change rooms, without missing a bit of Woman's Hour. Now has anyone noticed that they don't go a week without an in-depth discussion about breasts, but they never show them. Not like TV is it.

Start the day with this. Who don't love a bit of AM rock. Then for a laugh, this. Because we all love a car crash. Finish the day with this. Day is sorted