Notifications
Clear all
Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!
Topic starter
31/10/2021 2:20 pm
Hi @kev-m our installer, Ecobubl did a hear loss and heat demand calc (required by MCS). He then used the Daikin ASHP tool to plug the data into, to come out with a heat demand and electric usage curve per month across the year. So I am just comparing my metered ASHP usage to this. I don’t know how much is supplied by my solar PV.
My solar PV does provide all of the hot water over the summer months. Meaning ASHP does run.
Daikin Altherma 3H HT 12kWh ASHP with Mixergy h/w cylinder; 4kW solar PV with Solic 200 electric diverter; Honda e and Volvo EX30 Ultra Twin Performance electric vehicles with Myenergi Zappi mk1 & Ohme chargers
2
Topic starter
31/10/2021 5:16 pm
@jeff yes both. Coming to about 21k kWh per year for both
Daikin Altherma 3H HT 12kWh ASHP with Mixergy h/w cylinder; 4kW solar PV with Solic 200 electric diverter; Honda e and Volvo EX30 Ultra Twin Performance electric vehicles with Myenergi Zappi mk1 & Ohme chargers
2
31/10/2021 5:42 pm
@julianc the ASHP used 560kw in October, last year on gas we used 3,000kw. So all together not too shabby in terms of use. I get that as a cop of 5.3 (if demand was broadly the same) however I've been running the house overnight at 20 and at 22° between 00.30 and 04.30 due to the go tariff. So the house is probably far warmer than last year.
4
31/10/2021 5:47 pm
@batalto, that's brilliant. Great to hear it's been such a success.
Get a copy of The Ultimate Guide to Heat Pumps
Subscribe and follow our YouTube channel!
31/10/2021 5:56 pm
@batalto Hi Batalto,
I am pleased to see that at least someone has been listening. Well done on your efforts to reduce your energy consumption.
2
31/10/2021 6:02 pm
@derek-m not sure I've been listening lol. My minimum temperature is set to 37° and the house is much more comfortable than it was with the water temperatures in the 20s. That said the radiators in our main room are far colder, so I think they need balancing.
As a note, I've never seen the ASHP use more than 3kw at any point yet. It's a 12kw pump, so it's performing admirably as far as I can see.
31/10/2021 6:16 pm
From the data I have October should be roughly 6% of your annual demand. 565/6% = 9,416kw for the year. Last year we used 34,683kw. So if we can get by with 9.4MW I get an annual COP of 3.68
31/10/2021 6:58 pm
@batalto 37 Deg C is vey high at this time of the year, I would expect to be running at least 10 Deg lower than that, however, it you have buffer tanks, system seperation, TRV's and thermostats, that is why you have to keep it that high with a resulting reduction in performance and increased electricity bill.
31/10/2021 7:27 pm
Just for intersts sake, this is how a heat pump should be installed. It is exactly the same as a system gas boiler but with bigger pupes, valves and no control on the under floor or radiators (except in the bedrooms).
Mars, you can move this wherever you want.
4
31/10/2021 7:41 pm
@heacol less than that just doesn't warm up our main room - which is where we have the most heat loss. There is no way to fix it without changing a huge area of glass; the bi folds are more than 12m2. I think there is also an issue with radiator balance as they are coldest in the house. Once that's fixed I might be able to lower the temperature. However my current price per KW is 10p averaged, so I'm doing pretty well.
31/10/2021 7:50 pm
@heacol the whole house, however that room would seem to have it's own climate. You can feel a difference in the doorway. The thermostat lives in the main room
SPONSORS
Degrees of Separation
Latest Posts
-
RE: Heat pump installation quotations
That will be absolutely murdering your energy efficienc...
By EtchedPixels , 1 hour ago
-
RE: Harvest Thermal - ASHP with a smart thermal battery
The cooling side works much better if you can figure ou...
By EtchedPixels , 2 hours ago
-
Floor standing brackets for K3 rads
My neighbour is a plumber and said I would need to fit ...
By Singlespeed , 2 hours ago
-
After an intense recode, I’m pleased to announce that w...
By Mars , 2 hours ago
-
Why do you want to maintain a specific deltaT? The out...
By JamesPa , 4 hours ago
-
Hopefully this will answer your question. To...
By ASHP-BOBBA , 5 hours ago
-
RE: Help me keep the faith with my air source heat pump installation
I would be interested to find out if others do this and...
By ASHP-BOBBA , 5 hours ago
-
Don't you dare. You just carry on as you are; as @batpr...
By Majordennisbloodnok , 6 hours ago
-
RE: Heat pump design review please: 5 kW Vaillant aroTHERM Plus heat pump
@ragtime27 some rooms in our house only have one place ...
By Judith , 7 hours ago
-
RE: Several AC coupled batteries
That is a good point, a manufacturers can stop trading,...
By Batpred , 10 hours ago
-
RE: Indevolt Batteries UK Support & Info Thread
Hi @hanno - good question. The range of hybrid invert...
By Transparent , 11 hours ago
-
RE: GivEnergy inverter tripping due to over-voltage?
@transparent the inverter was installed in 2021 and afa...
By Tim441 , 11 hours ago
-
RE: Say hello and introduce yourself
I hope so, @toodles. It's not often that we see a situa...
By Majordennisbloodnok , 15 hours ago
-
RE: Electricity price predictions
Good point, I do expect the bonus of putting my energy ...
By Batpred , 2 days ago
SPONSORS
