Last seen: Sep 19, 2024
@jamespa I am surprised that the school did not opt for GSHP's, since they are much quieter, can be installed inside,and probably would be more effi...
Don't panic. It was a hypothetical answer that I supplied, since the required conditions are not possible to achieve even using a modeling tool. I a...
I performed the test that was requested, which was 12 hours @ 10C, then 12 hours @ 20C. I'm not certain what was the purpose of the test or its useful...
@jamespa I can assure you that I was not being combative, merely having some fun, otherwise I would have given my usual warning 'that I don't take p...
You required a modeling tool to answer the questions. IAT 10 Avg. 15 20 PI 10644 74262 ...
@cathoderay 250kWh was chosen because it provides a believable fall in IAT when the heat pump is stopped. I have tried various values and 250kWh see...
Let me try to explain the various problems, and then you can decide whether to explore this matter further. The 'Initial Data' sheet contains the da...
I was merely stating that without some form of recovery boost, the time required for IAT to reach the desired value may be lengthy. A further determin...
I think that you will find that the modeling tool already takes account of the variation of COP with load, also with OAT and LWT, by extrapolating the...
When using the modeling tool it is first necessary to calculate the reference conditions, which in this case was 24 hour running at an OAT of 10C, giv...
@cathoderay There is no 'black box', there are no hidden cells, everything is open to view. If you don't understanding what you are seeing then plea...
@jamespa I think that you will find that degree days don't work well with heat pumps, because the COP varies quite considerably with OAT.
Latest Posts
-
RE: Repiping and Reconfiguring our Heat Pump System Including Removing the Buffer Tank
ok my setup is pretty simple: 7.35kw cibse heat loss ...
By AdamK , 5 hours ago
-
RE: How to choose Towel Rails for an ASHP
In one en-suite bathroom we have a 180cm high towel rai...
By Judith , 6 hours ago
-
RE: Testing new controls/monitoring for Midea Clone ASHP
This is actually based on the same chipset as the Svena...
By Grantmethestrength , 7 hours ago
-
RE: Powerwall 3 or Myenergi or something else?
@adamk what you need is enough battery size to cover 3 ...
By Judith , 13 hours ago
-
-
RE: Say hello and introduce yourself
@jarlatheoin do put the MVHR in early it’s not an easy ...
By Judith , 13 hours ago
-
RE: How to Zone with a Single Room with UFH
We have exactly what you describe, one utility room wit...
By Judith , 13 hours ago
-
RE: Who's your electricity provider and what's your tariff?
@agentgeorge Come the Ist of October, the Cosy cheapest...
By Toodles , 14 hours ago
-
RE: Boxt Heat Pump Installation Experience
@ashfp Mine does have a buffer tank. That was my experi...
By Andrew J H , 1 day ago
-
RE: Which temperature sensor for a Steibel buffer and Ecodan?
@ashp-bobba might be able to help as an Ecodan expert.
By Mars , 2 days ago
-
RE: Help me keep the faith with my air source heat pump installation
I'm sure you are right, I was just trying to understand...
By JamesPa , 2 days ago
-
RE: Preparing for 2nd winter in new build house.
Yuch! So that's basically just an on/off control. I...
By Transparent , 3 days ago
-
Good day everyone. I'm new here and have a few question...
By Edin67 , 3 days ago
-
RE: MCS certificate SCOP vs real-world performance
That may be contributing to lower than expected SCOP. ...
By JamesPa , 3 days ago
-
-
RE: Mitsu PAR-WT60R Wireless Controller - options
How it does it's job is something of a mystery although...
By Abernyte , 3 days ago
-
@mixergy Thanks for the update, I would appreciate some...
By bontwoody , 5 days ago
-
RE: Is Your Broadband Router the Weak Link in Your High-Tech Home?
Unfortunately I'm not that well connected 😂 ...
By Scalextrix , 6 days ago
-
RE: A Customer's Lessons Learnt from a Heat Pump Installation in a Large House
It is interesting to see what our new Grant Aerona 290 ...
By GrahamF , 6 days ago
