@colin are you tempted to replace the glycol and see what difference it makes to the system performance and efficiency? Is there any data that indicates the potential differential in efficiency?
Posted by: @colin@derek-m I'm afraid I can't answer why that is, other than the builder who fitted the UFH/Raditors and all the plumbing was different from the company who did they ASHP.
Hi Colin,
Are you certain that you actually have dump valves installed? If so, where will they actually dump the water and glycol mixture should they operate?
If my understanding is correct, having antifreeze included will not stop the dump valves from operating under the specified conditions.
Posted by: @webcmg@colin are you tempted to replace the glycol and see what difference it makes to the system performance and efficiency? Is there any data that indicates the potential differential in efficiency?
It should be possible to roughly calculate the effect if you know the concentration of glycol.
Glycol has a lower specific heat capacity than water, so can transport a smaller quantity of heat energy than a similar volume of water. The greater the concentration of glycol, the lower the quantity of heat energy that will be transported.
Posted by: @derek-mPosted by: @webcmg@colin are you tempted to replace the glycol and see what difference it makes to the system performance and efficiency? Is there any data that indicates the potential differential in efficiency?
It should be possible to roughly calculate the effect if you know the concentration of glycol.
Glycol has a lower specific heat capacity than water, so can transport a smaller quantity of heat energy than a similar volume of water. The greater the concentration of glycol, the lower the quantity of heat energy that will be transported.
I haven't calculated it but I've read it's about a 5% loss for a typical ASHP treated with a glycol based inhibitor vs pure water. That will add up but won't make a noticeable difference to your COP.
One point to note is that the specialist heat pump glycol solutions also have corrosion and biological inhibitors; they're not just anti-freeze. Unless it's done on the cheap using car anti-freeze of course. But nobody would do that. Would they...?
Hi all, my smart meter connectivity issues now appear to have been resolved and I can see consumption at 30 minute intervals via the Bright app. Does anyone know if it is possible to view this data in Home Assistant? Many thanks.
@webcmg Hi webcmg, it is. Here's the integration I used.
https://github.com/HandyHat/ha-hildebrandglow-dcc
@webcmg Hi, I use the SMETS2 frient Electricity Meter Interface which uses Zigbee and quite easy to set up with ZHA.
https://www.amazon.co.uk/20207000-Electricity-Consumption-Battery-Powered-SmartThings/dp/B08WXT6HHJ
I also managed to get my Geo Trio3 IHD plus wifi module working with HA but that was more challenging with having to edit YAML files and quite tricky.
Both give live meter readings so I can guess what the Heat Pump is up to.
@webcmg Hello. I know this is an old thread, but I have just had Vaillant ASHP fitted, and am working my way round how to get the best out of it. The fitters said 'Leave the controls alone!'. Which I have, of course, ignored totally!. I have messed up once or twice, but factory reset is always there as a fall back! Whatever you do, do not leave the hot water on all the time. I have set mine to run for a couple of hours - midnight till 2 am - Tues and Weds, plus Sat and Sun. Loads of hot water, much lower power consumption.
@yogabob this is still very much active thread as our developers continue to try to resolve the performance and efficiency issues. Our DHW heats up for an hour each night, it easily hits the 48 deg within the hour and averages between 2kwh and 3kwh per night at this time of year. Not sure I understand why you only heat it on two consecutive nights twice a week?
-
UFH and ASHPs
2 weeks ago
-
Installing your own ASHP - DIY
1 month ago
-
ASHP install contract and BUS grant money
3 months ago
-
Savings - using Weather Compensation & Time of Use Tariffs
3 months ago
-
Heat Pump starting current
4 months ago
- 22 Forums
- 2,076 Topics
- 45.5 K Posts
- 72 Online
- 3,355 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: I worry I've messed my Samsung settings up somehow
@alfapat that's this time of year? Maybe I'm just ex...
By Joshua , 9 hours ago
-
RE: 5 Star Service from Havenwise
@sheriff-fatman Exactly this is why a lot of our users ...
By HCas , 14 hours ago
-
RE: Solar Thermal DHW and ASHP
I'm beginning to think solar thermal is something that ...
By Alex_N , 16 hours ago
-
Feasible solutions to expand existing Sunsynk battery capacity
I have a 6.3kWp solar array with a 5kW Sunsynk inverter...
By Sheriff Fatman , 16 hours ago
-
RE: Commencing on an ASHP Installation Process
I received the BUS Grant permission email yesterday eve...
By Sheriff Fatman , 18 hours ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
510kWh of solar PV from my 4kW Hyundai panels and SMA S...
By JulianC , 2 days ago
-
RE: Is my Samsung heat pump working too well?
Thats in itself is interesting. I have a Vaillant heat...
By JamesPa , 3 days ago
-
RE: Jokes and fun posts about heat pumps and renewables
@transparent Not a swell season then ☹️
By Toodles , 3 days ago
-
RE: Air Changes per Hour - ACH and the MCS requirement
update - my old installer insisted on a heat loss of 11...
By MatWin , 4 days ago
-
I agree it's not very helpful. Generally, the max heat ...
By Old_Scientist , 4 days 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 , 5 days ago
-
RE: Enabling WiFi: Samsung ASHP on Smart Things App
Thanks for the input. I've been running various experim...
By Grahamh-uk , 5 days 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 , 5 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 , 5 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 , 6 days ago
-
RE: Getting the best out of a heat pump - is Homely a possible answer?
@editor Cobbler’s Mantra that!
By Toodles , 6 days ago
-
RE: Renewables & Heat Pumps in the News
Australia Blue, the first wind farm in Western Victoria...
By Morgan , 7 days ago
-
RE: Flow rate discrepancy between ASHP and manifold
That's useful thanks, I hadn't seen that table before. ...
By AshRolls , 1 week ago
-
In principle I agree, @johnmo, but with provisos. The...
By Majordennisbloodnok , 1 week ago