Domoticz thermal energy kWh, thermal energy meter Topic is solved

[geoterm]

Hello, could someone help? I need to measure and count the amount of thermal energy produced by a kW heat pump. How it do ? Is there such a device or do I need a script?

[waltervl]

What unit of measure do you need? Joules?

[BartSr]

Trying to calculate COP of heatpump?

[geoterm]

Trying to calculate COP of heatpump?

Yes of course, I have calculated cop, that's not a problem.

[geoterm]

What unit of measure do you need? Joules?

Best in kWh.

[waltervl]

What unit of measure do you need? Joules?

Best in kWh.

Then you can use a normal energy/electricity counter device. But your integration needs to supply the value, else you need to calculate it yourself with eg a dzvents script.

[geoterm]

Exactly, I need a script to calculate this. Maybe someone already has one like this and is willing to share.

[HvdW]

Easiest is to ask AI to write the script. AI has no problem writing dzVents.

BTW Can you share how to write your beatiful Dashboard?

[waltervl]

You can try to ask AI but be aware it creates also still a lot of rubbish, examples enough here on the forum.

But you first have to think about the values you need to calculate the energy in kwh. What iuput do you have and what should be the formula to calculate the desired energy....

[geoterm]

I don't want AI because nothing can replace a human in this regard.

The input data is: device operating time and heat pump power Qw. W [kWh] = P [kW] * t [h]

[waltervl]

So what are the Domoticz devices that have these values for P and t?
And when you have only P you can use an Electricity (Instant and counter) device that can calculate E kWh from P Watt values when supplied.

[BartSr]

For yr calculation you need:
Measure device for E-input
Temp measure device inlet water
Temp measure device outlet water
Waterflow measure device.

All available?

[geoterm]

ok
I'm working

[RonkA]

So correct me if i'm wrong but you want to take Retour to well temperature ( 22.31 C) minus From well temperature (20.5 C) what gives Delta-temperature (dT) of 1.81 C right now.
The flowrate (m) is now zero L/minute but in the calculation you need L/second so divide by 60.

You don't specify the liquid what is used in the well loop so that is a problem to make the right calculation, for now i assume The specific heat capacity (cp) of normal water what is 4180 J/liter.

So the thermal energy calculation (Q) would be now: Q=(m/60)*cp*dT --> Q=(0/60)*4180*1.81 --> Q=0 Watt

I don't know the normal flowrate but lets say it is 10 L/minute this would give Q= (10/60)*4180*1.81 = 1261 Watt

[geoterm]

I'm not an automation expert, it's my hobby, I'm just getting started.

[geoterm]

Easiest is to ask AI to write the script. AI has no problem writing dzVents.

BTW Can you share how to write your beatiful Dashboard?

Made in autocad without AI .

[geoterm]

I'm testing to see if I've added the correct device, and then after a day of work, to see if it's counting correctly. But it looks good. Thanks.
I still have a few questions or missing information in my smart home.

[geoterm]

So correct me if i'm wrong but you want to take Retour to well temperature ( 22.31 C) minus From well temperature (20.5 C) what gives Delta-temperature (dT) of 1.81 C right now.
The flowrate (m) is now zero L/minute but in the calculation you need L/second so divide by 60.

You don't specify the liquid what is used in the well loop so that is a problem to make the right calculation, for now i assume The specific heat capacity (cp) of normal water what is 4180 J/liter.

So the thermal energy calculation (Q) would be now: Q=(m/60)*cp*dT --> Q=(0/60)*4180*1.81 --> Q=0 Watt

I don't know the normal flowrate but lets say it is 10 L/minute this would give Q= (10/60)*4180*1.81 = 1261 Watt

I took a screenshot so the delta calculation—you're right—is based on the time interval. Before the correct calculation was made, the previous temperatures were visible.

[geoterm]

Easiest is to ask AI to write the script. AI has no problem writing dzVents.

BTW Can you share how to write your beatiful Dashboard?

Please, if you want.

[geoterm]

This is a diagram of an air-source heat pump. To the left of the wall is the outdoor air-source unit, and to the right is the building system with a glycol heat exchanger.