[SOLVED] New template for Heatpump COP calculation : How to do it?

[wrongisthenwright]

I’ve got an Ariston Heatpump integrated via eBusd into HA.
I’m gathering all the metrics needed to calculate the COP of the HP, this in all the possible running configurations.
I already have a formula that calculate the instantaneous COP, based on LWT, EWT and flowmeter readings.

          {% if ((states('sensor.ebusd_heatpump_ebusd_heatpump_compressor_info_flow_meter') | float (default=0)) > 15
            and (states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_info_heatpump_mode') | string ) != 'Stand_by') %}
                   {{ ([0,(((((states('sensor.ebusd_heatpump_ebusd_heatpump_coolat_data_lwt_temp') | float (default=0)) - 0.2 - (states('sensor.ebusd_heatpump_ebusd_heatpump_coolat_data_ewt_temp') | float (default=0)) | abs) * (states('sensor.ebusd_heatpump_ebusd_heatpump_compressor_info_flow_meter') | float (default=1)) * 60 * 1.16) / (states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_power_consumption') | float (default=1))) |abs |round(2)),8]|sort)[1] }}

The calculations take into account the conversion from DeltaT in °C to KW/h and the l/min to M3/h ratio conversion.
I’ll beautify my horrendous code following a hint found here on the forum during my search

 {% set vl = states('sensor.LWT') | float %}
  {% set rl = states('sensor.EWT') | float %}
  {% set vol = states('sensor.Flowmeter') | float * 60 %}
  {% set powercons = states('sensor.powercons') | float %}
  {% if powercons != 0 %}
    {{ ((vl - rl) | abs) * vol * 1.16) / powercons }}
  {% else %}
   ????
  {% endif %}

I need help to figure out how to add a little more complexity to the template:

• the returned value should be unavailable if the flowmeter is zero: I want to calculate average COP over longer time periods and when the HP is not running then these value should not alter average calculations

• when the heatpump is doing defrost operations
  states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_info_heatpump_mode') | string ) = 'Defrost'
  then the calculated COP should be negative, as the enegy used is not going into the house but wasted in deicing the battery
• the COP value should be limited into a range let’s say 0-8 because in some corner cases I’ve experimented in the last months the readings may lead to exaggerated values

Can you give me an hint on the syntax to obtain a credible COP calcs?

TY

[Troon]

If you want to use the availability feature, you have to use YAML config at the moment. Something like this:

template:
  - sensor:
    - name: "COP"
      state: >
        {% set vl = states('sensor.lwt')|float(0) %}
        {% set rl = states('sensor.ewt')|float(0) %}
        {% set vol = states('sensor.flowmeter')|float(0) * 60 %}
        {% set powercons = states('sensor.powercons')|float(0) %}
        {% set neg = -1 if is_state('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_info_heatpump_mode', 'Defrost') else 1 %}
        {{ neg * ((0, (((vl - rl) | abs) * vol * 1.16) / powercons, 8)|sort)[1] }}
      availability: >
        {{ states('sensor.flowmeter')|float(0) > 0 and
           states('sensor.powercons')|float(0) > 0 }}

[wrongisthenwright]

many thanks @Troon !!!
I’ve made some slight adaptations to exclude some mode (eg when the HP is in stand-by mode) and voila!

Now I’ll test it till the first defrosts (this night surely) and see what it will spat out…

Many thanks again, great community here!

[wrongisthenwright]

Hi @Troon many thanks for your hint, I’ve made it, this is the final product:

        state: >
          {% set lwt = states('sensor.ebusd_heatpump_ebusd_heatpump_coolat_data_lwt_temp')|float(0) %}
          {% set ewt = states('sensor.ebusd_heatpump_ebusd_heatpump_coolat_data_ewt_temp')|float(0) %}
          {% set vol = states('sensor.ebusd_heatpump_ebusd_heatpump_compressor_info_flow_meter')|float(0) * 60 %}
          {% set powercons = states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_power_consumption')|float(0) %}
          {% set neg = -1 if is_state('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_mode', 'Defrost') else 1 %}
          {{ neg * ((0, ((((lwt - ewt - 0.2) | abs) * vol * 1.16) / powercons)|round(2), 8)|sort)[1] }}
        availability: >
          {{ states('sensor.ebusd_heatpump_ebusd_heatpump_compressor_info_flow_meter')|float(0) > 0 and
             states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_power_consumption')|float(0) > 0 and
             ( states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_mode')|string == 'Heating' or
               states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_mode')|string == 'Defrost' or
               states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_mode')|string == 'Cooling' or
               states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_mode')|string == 'Heating_boost' or
               states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_mode')|string == 'Cooling_boost' or
               states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_mode')|string == 'Heating_rating' or
               states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_mode')|string == 'Cooling_rating' ) }}

It needs a little thinkering because I’ve noticed that the HP mode sensor switch to defrost a little late than the actual switching of the HP mode but the number are far more realistic now.

Many thanks again
EDIT: fixed powercons sensor and HP mode sensor

[Kodjo]

Hi, I’ve got an Ariston Heatpump two and wanted to use your example to calculate the COP. I face the problem that the ebusd_heatpump_heatpump_info_heatpump_mode does not give valid values. The ariston.csv contains some none compatible info. What CSV file do you use for your Ariston HP?

[wrongisthenwright]

Hi,
I’m using the file ariston.csv from my repo:

GitHub - wrongisthenewright/ebusd-configuration-ariston-bridgenet: Ebusd...

but there was an error in the previous post, this is the correct yaml I’m now using:

          {% set lwt = states('sensor.ebusd_heatpump_ebusd_heatpump_coolat_data_lwt_temp')|float(0) %}
          {% set ewt = states('sensor.ebusd_heatpump_ebusd_heatpump_coolat_data_ewt_temp')|float(0) %}
          {% set vol = states('sensor.ebusd_heatpump_ebusd_heatpump_compressor_info_flow_meter')|float(0) * 60 %}
          {% set powercons = states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_power_consumption')|float(0) %}
          {% set neg = -1 if is_state('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_mode', 'Defrost') else 1 %}
          {{ neg * ((0, ((((lwt - ewt - 0.2) | abs) * vol * 1.16) / powercons)|round(2), 8)|sort)[1] }}
        availability: >
          {{ states('sensor.ebusd_heatpump_ebusd_heatpump_compressor_info_flow_meter')|float(0) > 0 and
             states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_power_consumption')|float(0) > 0 and
             ( states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_mode')|string == 'Heating' or
               states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_mode')|string == 'Defrost' or
               states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_mode')|string == 'Cooling' or
               states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_mode')|string == 'Heating_boost' or
               states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_mode')|string == 'Cooling_boost' or
               states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_mode')|string == 'Heating_rating' or
               states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_mode')|string == 'Cooling_rating' ) }}

[Troon]

Tip to save all that repetition:

        availability: >
          {{ states('sensor.ebusd_heatpump_ebusd_heatpump_compressor_info_flow_meter')|float(0) > 0 and
             states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_power_consumption')|float(0) > 0 and
             (states('sensor.ebusd_heatpump_ebusd_heatpump_heatpump_mode') in
              ['Heating', 'Defrost', 'Cooling', 'Heating_boost', 'Cooling_boost', 'Heating_rating', 'Cooling_rating']) }}

[Kodjo]

Thanks for the reply. I use the same CSV and it is great for most part. The only thing is that this heatpump mode only shows “Cooling_rating” and no other states. How can this happen?

[wrongisthenwright]

Let’s not continue here as the issue is solved.
We can move the discussion on the integration thread.

Ariston Group integration via eBusd

Hi all, this is a post on how to integrate Home Assistant, via eBusd, to an Ariston Group (R) BusBridgenet (R) HVAC system, accessing the system bus via a custom/dedicated adapter, in READ and WRITE operations. You’ll be able read and change parameters as temperatures, modes etc. This post is not a comprehensive HOWTO, but a more general “instruction” on how to do it, as there are many different ways to tap into the bus and many configuration possible for HA (HASSIO, local setup, docker etc). …