ASHP & triple glazing

[Stinsy]

Joeboy, nice, hope to there myself next year, gas hob changed to induction hob a few months back, ASHP hopefully next year. I'll be posting a thread or two soon. Out of curiosity why is the gas pipe insulated?

Stinsy, totally agree on the first point, same goes as to why they don't all have solar. But surely plumes of water vapor shows they are working in condensing mode???

Plumes of vapour means they’re not condensing!

[Moxi]

When my LPG boiler is condensing I get a almost clear exhaust and big droplets of water blown out of the exhaust vent - which I take to mean that the water vapour has recondensed in the heat exchanger and given up its heat to the water circuit. I would think condensing vapour in the air outside indicates that energy has been wasted.

Moxi

[Joeboy]

Joeboy, nice, hope to there myself next year, gas hob changed to induction hob a few months back, ASHP hopefully next year. I'll be posting a thread or two soon. Out of curiosity why is the gas pipe insulated?

Stinsy, totally agree on the first point, same goes as to why they don't all have solar. But surely plumes of water vapor shows they are working in condensing mode???

Simply because it's cold. Was cold .

That's a good path you are on. We have the fallback of the 2kW offgrid inverter T'd off of the battery stack and the WBS too. With these and the offgrid solar panels we could get along fine for a long time if grid dropped out. Keep that in mind for yourself. Even if it's as simple as a handful of candles and a camping stove with spare cylinder.

It's good to take care of business yourself and not have to rely....

[Fintray]

Thursday should be the first day of true running with the home heat soaked from ashp. That's based on firing up tomorrow. Fingers .
Running 80kWh days with no ev charge it breaks down to something like this.
35kWh stack
12kWh HWT
33kWh SH

If we can hit a cop of 4 for the rads that 33 should drop to 8kWh. A cop of 3 for hwt would be 4kWh consumption. That would drop the day consumption to 47kWh.

I look forward to seeing how far off the mark I am with that guess. 5degs outdoors, no EV, 47kWh round-trip, 19degs in the house. Try out Fintrays 0.4 set point.

Lastly, adding bigger radiators in two places to keep space spots we value added £1,000 to the bill. The bigger rads defo come at a price premium although I do think they've got an Arthur C Clarke monolith vibe.

Here's to the switch on tomorrow Joe!
Some figures from the last 7 days:
Average daily electricity import 78.5kWh
Average daily electricity export 20.6kWh
Average daily heat pump consumption 30.1kWh
Average daily heat pump output 125.3kWh
Mean temperature 3.5C
COP 4.16
Heating curve setpoint 0.35

[Joeboy]

Thursday should be the first day of true running with the home heat soaked from ashp. That's based on firing up tomorrow. Fingers .
Running 80kWh days with no ev charge it breaks down to something like this.
35kWh stack
12kWh HWT
33kWh SH

If we can hit a cop of 4 for the rads that 33 should drop to 8kWh. A cop of 3 for hwt would be 4kWh consumption. That would drop the day consumption to 47kWh.

I look forward to seeing how far off the mark I am with that guess. 5degs outdoors, no EV, 47kWh round-trip, 19degs in the house. Try out Fintrays 0.4 set point.

Lastly, adding bigger radiators in two places to keep space spots we value added £1,000 to the bill. The bigger rads defo come at a price premium although I do think they've got an Arthur C Clarke monolith vibe.

Here's to the switch on tomorrow Joe!
Some figures from the last 7 days:
Average daily electricity import 78.5kWh
Average daily electricity export 20.6kWh
Average daily heat pump consumption 30.1kWh
Average daily heat pump output 125.3kWh
Mean temperature 3.5C
COP 4.16
Heating curve setpoint 0.35

Really good to see those figures! The hot water cylinder change over is happening now. As far as I can see there are a few connections to make off (Bartek is at them now), fill bleed and alleyoop. I did say on Friday to try and get it running today. They can then clear the remaining snaglist around a working system. YOU KNOW, A WORKING SYSTEM LADS???!!!

We'll see! Good to see that I'm not so far off in my guess on consumption.

Good lads these.

[Ronski]

Plumes of vapour means they’re not condensing!

Numerous Google results suggest the opposite, they form water vapour on exiting the flue because the gases are cooler, this the water vapour condenses quicker, and is therefore visible.

https://www.parkstone-yorkshire.co.uk/i ... %20plumage.

[Stinsy]

Plumes of vapour means they’re not condensing!

Numerous Google results suggest the opposite, they form water vapour on exiting the flue because the gases are cooler, this the water vapour condenses quicker, and is therefore visible.

https://www.parkstone-yorkshire.co.uk/i ... %20plumage.

It really isn't complicated!

The products of combustion are CO2 and H2O. In order for the boiler to run at it's most efficient, the H2O should be exhausted as a liquid condensate. If the water condenses outside the boiler in the plume that you can see then the boiler isn't condensing and is poorly set up.

[Ronski]

Simply because it's cold. Was cold .

That's a good path you are on. We have the fallback of the 2kW offgrid inverter T'd off of the battery stack and the WBS too. With these and the offgrid solar panels we could get along fine for a long time if grid dropped out. Keep that in mind for yourself. Even if it's as simple as a handful of candles and a camping stove with spare cylinder.

It's good to take care of business yourself and not have to rely....

No problem there, 29 kWh of batteries with 8kW Victron Quattro inverter, along with 3.68kW SolarEdge AC connected inverter, total of 15.5 kWp of panels. Whole house back up as well, as long as we don't exceed the Quattro's rating Also big stack of wood and WBS. Built the batteries myself, and did all DC work on the Victron system.

Stinsy, I'm not going detail this thread, but even condensing boilers are not 100% efficient, therefore there will always be heat in the flue gases, and thus some vapour to condense.

[Krill]

Unless the gas boiler is 100% efficient (or over?) it will release exhaust gases that will cool and condense at the outdide temperature (given the obvious assumption outside is colder than inside), it doesn't follow that the boiler is by necessity not set up correctly...

[spread-tee]

The plume you see is condensed water vapour, vapour is invisible, steam is tiny droplets.

Desp