SCOP
I’m curious to know what everyone’s SCOP on their ASHPs is. If you’ve been running your pump for a year (one winter and one summer) I’d love to know who has an annual COP of over 3.
Please pop your numbers below.
Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb
Subscribe and follow our Homeowners’ Q&A heat pump podcast
I can only use the Carnot number from Emoncms HP app. Using the Carnot formula my number is 4.22. My total energy usage for the year 3634kwh. The "SCOP" number compares to previous oil usage of 1600litres/annum (16000kwh) and estimated energy usage from EPC and estimated energy usage from heat loss calculation.
How do you work out the COP some say its yield divided by consumption and others say yield plus consumption divided by consumption??
COP is heat delivered divided by power consumed.
So 100 kW / 20 kW = 5 COP
On my system (Vaillant Arotherm Plus 5kW hybrid system) it is showing from 1st January through to today, it has consumed 686 kWh and the yield is 3605 kWh, so a COP of 5.25, so happy with that, although the numbers are obviously a bit of a fudge as the boiler kicks in when the COP would be lower.
Our lifetime COP is 2.71 as we enter our fourth winter with this heat pump.
Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb
Subscribe and follow our Homeowners’ Q&A heat pump podcast
Not sure if this has been posted. Theoretical but interesting.
We just had the first annual service. Ecodan R32 8.5kW as sole source for heating and hot water. Reading the numbers off the controller works out to 3.15 for the year. I was expecting lower because the hot water figure (captured on a third-party app called MMSPHeatPump) isn't great, even in summer.
- 21 Forums
- 1,962 Topics
- 42.6 K Posts
- 65 Online
- 2,276 Members
Join Us!
Heat Pump Dramas?
Thinking about installing a heat pump but unsure where to start? Already have one but it’s not performing as expected? Or are you locked in a frustrating dispute with an installer or manufacturer? We’re here to help.
✅ Pre-Installation Planning
✅ Post-Installation Troubleshooting
✅ Performance Optimisation
✅ Complaint Support (Manufacturer & Installer)
Latest Posts
-
RE: Volumisers in Heat Pump Systems: Does Placement Matter?
Whilst I agree with the final conclusion (flow side pla...
By JamesPa , 6 minutes ago
-
RE: Newbie out of her depth – Samsung AE120RXYDEG 12kW heat pump
@bami I think if the heat loss documentation matches a ...
By bontwoody , 8 minutes ago
-
@eliuccio Hi. Firstly, I am not associated with any co...
By Heatgeek , 11 minutes ago
-
RE: What is the best strategy for operating a very oversized heat pump?
@jamespa I'm afraid that's over my head but if anyon...
By IRMartini , 36 minutes ago
-
RE: Setback savings - fact or fiction?
And here in case any one wants it is the code I used in...
By cathodeRay , 46 minutes ago
-
RE: Samsung Gen 7 R290 12kW is not behaving how I expected
Definitely its in the 20xx FSVs. Conversely it may be...
By JamesPa , 1 hour ago
-
RE: Towel rails. An unexpected final hurdle
We have both Normal Rad for heating the room and then a...
By IRMartini , 3 hours ago
-
RE: Heat Pump Sizing & Installation Costs
Perhaps useful to have installed date too? To get conte...
By Tim441 , 5 hours ago
-
RE: SolarPV tables / online calculator
I'd be interested what others find whilst using that we...
By Majordennisbloodnok , 7 hours ago
-
RE: F.788 Building circuit pump reports internal fault - Vaillant Arotherm
Guess I have to wait for engineer visit. I really hope ...
By jeegnesh , 19 hours ago
-
RE: Act now to defer the UK road tax increase on EVs
@majordennisbloodnok Damn right sir. my attempt at iron...
By Jancold , 22 hours ago
-
RE: ASHP and heating issues in new build house
That’s good gives you more capacity. It made me think, ...
By Terry1812 , 23 hours ago
-
RE: Seewet manhole cover within r290 exclusion zone
Thanks! I asked Vaillant, and they say I should be fi...
By dbrb2 , 1 day ago
-
Looking for the Grant Aerona 3 setting to turn off completely at 20 OAT
I'm running my Aerona 3 on WC and the 'warm end of that...
By damonc , 1 day ago
-
RE: Do I just go with the lowest quote for my heat pump?
So after signing in Sept in two weeks the install may s...
By Jancold , 1 day ago
-
RE: Victorian Semi Retrofit / Extension ASHP and UFH Advice
When you are renovating is always a good time, as it ma...
By JamesPa , 1 day ago
-
RE: Just one room not reaching desired temperature
Looks like this issue is now resolved. Aira installed a...
By ChandyKris , 1 day ago
-
There have been several people on the OpenEnergyMonitor...
By RobS , 2 days ago
-
RE: Say hello and introduce yourself
Good point @jamespa But that probably strengthens @ch...
By Transparent , 2 days ago
Latest Topics
-
Heat Pump Sizing & Installation Costs
By Mars 7 hours ago
-
Volumisers in Heat Pump Systems: Does Placement Matter?
By Mars 8 hours ago
-
SolarPV tables / online calculator
By MichelleC 15 hours ago
-
By Toodles 2 days ago