What’s your ASHP delta T?
Just wondering what delta T folk use with their ASHP?
Did increasing it or decreasing it solve any issues or is it all about efficiency?
Around 5.5degK at design output. Narrows to about 2.4degK on WC low load. Constant flow system so variable deltaT.
This is of particular interest to me at the moment, as I am trying to work out how my Midea heat pump controls (modulates) its output in response to changing OATs, not whether it uses weather compeensation (it does), but how it implements it in running parameters including the LWT/RWT delta t. The actual LWT/RWT delta t is complicated by the fact that my heat pump almost always (slow) cycles, making the delta t change all the time. However, as it happens, I calculated the mean delta t earlier today for two periods when the OAT was relatively stable over 24 hours, the first mean OAT at 11.40 degrees, the second mean OAT at 6.37 degrees, and the mean delta t values for the two periods were 2.24 and 3.52 degrees.
Neither I nor others who have looked have managed to find a setting in the Midea controller that allows the delta t to be set externally. It appears to come from the heat pumps internal control systems.
Midea 14kW (for now...) ASHP heating both building and DHW
- 26 Forums
- 2,197 Topics
- 48.4 K Posts
- 39 Online
- 5,854 Members
Join Us!
Podcast Picks
Latest Posts
-
RE: Heat pump and wifi kit connection.
Wi-Fi kit covers any Samsung device that has a modem in...
By Alfapat , 3 hours ago
-
RE: How to Understand Wiring Up a Heat Pump
I’m watched @pirate-rich rewire our wiring centre last ...
By Mars , 4 hours ago
-
RE: Heat Pump Installers: Competence, Illusion and the Hard Truth Homeowners Must Face
We’re going to do a full retrofix in spring with @pirat...
By Mars , 4 hours ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
@agentgeorge err… Pass! I dunno what caused that! I’ll ...
By Toodles , 4 hours ago
-
RE: Sizing - Save me from my headache
If you get an R290 pump you should be able to heat the ...
By JamesPa , 4 hours ago
-
RE: Help me keep the faith with my air source heat pump installation
@jamespa can you take a pic of the primaries inside the...
By AdamK , 5 hours ago
-
RE: Large heat pump options for church building
@aventus-eco Thanks Sean, will drop you a line.
By Josephiah , 5 hours ago
-
RE: Moving FIT array onto a Tesla Powerwall 3 possible?
@toodles that’s good news for @adamk
By Judith , 6 hours ago
-
@drei do you mean running block average, so 6months bef...
By Judith , 6 hours ago
-
RE: Samsung Gen 6 - Schedules not working
@technogeek That sounds very logical :-). I will give i...
By bontwoody , 9 hours ago
-
RE: Who's your electricity provider and what's your tariff?
Considering Octopus states all their electricity is gre...
By AgentGeorge , 9 hours ago
-
RE: Heat Pump + Tado Setup: Smarter Control for Secondary Pumps?
@pirate-rich thanks for the reply. If I were to explo...
By Lloydi , 10 hours ago
-
RE: Seal the Deal: Don't Let Your Heat Pump Leak Energy
@transparent I think the committee might get into some ...
By Toodles , 11 hours ago
-
Samsung ASHP Support in Midlands area?
Hi all, Per title.... can anyone recommend a ASHP ser...
By Andehh , 12 hours ago
-
RE: Why Air Release Valves and Deaerators are Non-Negotiable
When I had my system serviced recently, I asked the guy...
By Old_Scientist , 14 hours ago
-
May I present the maths I referred to earlier when disc...
By Transparent , 14 hours ago
-
RE: RDSAP10 effect on existing heat pump EPC rating?
How many times and dates have epc sap rules been change...
By Tim441 , 14 hours ago
-
RE: Rodents! A word of warning for heat pump owners
I think similar care should be taken against vermin ing...
By Transparent , 15 hours ago