Vaillant AroTherm 7kW Air Source Heat Pump
@derek-m Would the COP be lower if the radiator pipework running through a cold area doesn't have enough insulation ?
Posted by: @heat-pump-newbie@derek-m Would the COP be lower if the radiator pipework running through a cold area doesn't have enough insulation ?
Hi Newbie,
It depends if the pipework is within the internal area of the building and hence helping to provide heat energy, or if it is say underneath the downstairs floorboards or in the loft, then it may create additional heat demand. The greater the heat demand, the harder the heat pump has to work, and the lower that the overall COP will be.
Posted by: @duncan-mac@derek-m sorry I cant seem to see the attachment you mentioned
Hi Duncan,
That's because I forgot to attach it. 🙄Â
Posted by: @duncan-mac@derek-m thank you sorry again for being such a pain.
Hi Duncan,
You are not being a pain.
I have spent most of my career problem solving, which I find most enjoyable. 😀Â
Hi Newbie,
I don't seem to be able to access the private message that you sent yesterday evening, and for some reason I am not being notified of their existence. Can send your message again and remind me how your system is set to operate at the moment.
Hi Derek, just a wee query. Since I have Flow temperatures and outside temperatures at 2 min intervals, if I plot these on a graph, if the weather compensation is working properly and the internal temperature is either 21 or setback 18, should the resulting graph map onto the 0.80 heat curve the system is set to?
Hi Duncan,
Many of the heat pump manufacturers allow the weather compensation curve to be tailored to a particular home, but Vaillant are one of the manufacturers that use predefined heat curves.
Weather compensation was developed to adjust the water flow temperature, in an attempt to keep the indoor air temperature reasonably constant, with changing outdoor air temperature. The degree by which the water flow temperature needs to be changed for each 1C change in outdoor air temperature is dependent upon the rate at which the heat energy leaks out of your home. This can vary under different weather conditions, sunny days increasing the indoor air temperature in some rooms due to solar gain, windy and/or rainy days causing additional heat loss. So plotting indoor air temperature and outdoor air temperature against water flow temperature will not necessarily produce a repeatable graph, but it should give some idea of how effective the selected heat curve is at maintaining the indoor air temperature at the desired value.
If your controller is located within the main living area, once you have achieved reasonably accurate control using solely weather compensation, the next step would be to enable adaptive control, which fine tunes the required water flow temperature to maintain the indoor air temperature at the desired setting. Even if the outdoor air temperature remains constant, if the indoor air temperature starts to increase, then the water flow temperature would be lowered slightly. The reverse action would take effect if the indoor air temperature started to reduce.
By all means collect the data and produce the graph, which I feel certain many, including myself, would be interested to see.
Â
- 22 Forums
- 2,073 Topics
- 45.5 K Posts
- 70 Online
- 3,353 Members
Join Us!
Trusted Installers
Struggling to find a reliable heat pump installer? A poor installation can lead to inefficiencies and high running costs. We now connect homeowners with top-rated installers who deliver quality work and excellent service.
✅ Verified, trusted & experienced installers
✅ Nationwide coverage expanding
✅ Special offers available
Latest Posts
-
RE: Solar Power Output – Let’s Compare Generation Figures
Well we finished this month with an all time record! Ev...
By Andris , 7 hours ago
-
RE: 5 Star Service from Havenwise
Oh good! I was wondering when/if you might pick them ...
By Transparent , 9 hours ago
-
RE: Air Changes per Hour - ACH and the MCS requirement
update - my old installer insisted on a heat loss of 11...
By MatWin , 11 hours ago
-
I agree it's not very helpful. Generally, the max heat ...
By Old_Scientist , 12 hours ago
-
RE: Commencing on an ASHP Installation Process
I think therein lies the problem. Ratio of quotes to i...
By JamesPa , 1 day ago
-
RE: Why Your MCS-Certified Installer Might Not Be As Competent As You Think
Hive and most other smart thermostats don't play well w...
By JamesPa , 1 day ago
-
RE: Enabling WiFi: Samsung ASHP on Smart Things App
Thanks for the input. I've been running various experim...
By Grahamh-uk , 1 day ago
-
RE: Radiators downstairs are cooler at the bottom after ASHP install
@melonbuffet Hi, this sounds great is you are getting 5...
By ASHP-BOBBA , 2 days ago
-
RE: Ripped Off: How UK Homeowners Are Paying Gas Prices for Wind Energy
I believe there's another reason that network upgrades ...
By Transparent , 2 days ago
-
RE: What’s the modern take on advised types of insulation?
@jeff I am sorry @jeff if I have misunderstood what you...
By Toodles , 2 days ago
-
RE: Getting the best out of a heat pump - is Homely a possible answer?
@editor Cobbler’s Mantra that!
By Toodles , 3 days ago
-
RE: Renewables & Heat Pumps in the News
Australia Blue, the first wind farm in Western Victoria...
By Morgan , 3 days ago
-
RE: Flow rate discrepancy between ASHP and manifold
That's useful thanks, I hadn't seen that table before. ...
By AshRolls , 4 days ago
-
In principle I agree, @johnmo, but with provisos. The...
By Majordennisbloodnok , 4 days ago
-
RE: Heat pump installation and BUS Grant timings
@jamespa Thats how I understood it too. 🙂
By ASHP-BOBBA , 4 days ago
-
RE: Antifreeze top up for my heat pump - is this a rip off?
@sallyl That sounds about right if they are re-filling ...
By Brendon Uys , 5 days ago
-
I wouldn't be so sure about that. Heat pump designers ...
By JamesPa , 5 days ago
-
RE: Jokes and fun posts about heat pumps and renewables
@toodles they're a rowdy bunch!
By Mars , 6 days ago
-
RE: Home energy storage & battery register
@jamespa To a certain extent, by exporting to the grid ...
By Toodles , 6 days ago