Boiler-radiator heating based on inside + outside sensors

[10der 823]

hi!

 

just find interesting as for me formula

 

local tBoilerCalc = (tBoiler + SL * (setPoint - tOutside) + OF) + (SL * RI * (setPoint - tInside))

 

where

tBoiler = boiler temperature or sensor on boiler out pipe

tOutside = outside temperature

tInside = the current inside (room(s)) temperature

setPoint = req insde (room(s)) temperature

 

constant or settuped additonal params

 

RI - house insulation coefficient ( 20 - your house is naked   0 - a very coll / maximum insulation)

SL - thermoregulation curve (can be from 1.0 .. 3.5. just 

OF - temperature curve offset

 

local setPoint = 22.0

local tBoiler = fibaro.getValue(720, "value")

local tOutside = fibaro.getValue(1946, "value")

local tInside = fibaro.getValue(1945, "value") 

 

local RI = 15

local SL = 2.5

local OF = 0

 

local tBoilerCalc = (tBoiler + SL * (setPoint - tOutside) + OF) + (SL * RI * (setPoint - tInside))

print(tBoilerCalc)

 

25.649285714275
 

[Edo 0]

Hi,

 

What are you calculating? (what is  tBoilerCalc).

 

I put it in Excel and it doesn't make any sense.

 

I'm using something similar to calculate the temperature of water going into floor heating to regulate mixing valve
including the return water temperature to calculate current floor temperature.

 

[10der 823]

@Edo

4 minutes ago, Edo said:

What are you calculating?

what temp i sgould setup on the boiler what i have setPoint temperature in the room.

 

for floor heating we should use another coefficient

[Edo 0]

What kind of Boiler (Furnace) do you have that you can regulate the temperature. (without mixing valves)

 

 

Edited October 11, 2020 by Edo

[10der 823]

30 minutes ago, Edo said:

What kind of Boiler (Furnace) do you have that you can regulate the temperature. (without mixing valves)

Kospel (polska)

btw my wife never mixing valves... just once "configure" as she comfort and all.

idk.

[Momos 98]

4 hours ago, 10der said:

btw my wife never mixing valves... just once "configure" as she comfort and all.

I wish i could keep my wife on 22 Celsius.  It would save a lot of money ?

Regarding the Kospel boiler: is it a furnace or condensation unit ?  As if it is a condensation unit, the thermoregulation curve and offset should be inside it already. And the condensation units should always be left on.