Introducing HeatpumpMonitor.org - a public dashboard of heat pump performance

Timbones · 2022-11-26T12:06:13.947Z

Zarch:

I’d love to see this. But don’t envy the logic how you’re gonna differentiate.
Would you do it by flow temp? Or by electric input?

On my system I can differentiate heating vs. hot water by monitoring the pumps. Power use can then be attributed accordingly either at input time logging to two feeds, or when processing the data in the app. This does need setting up for each system though; I don’t think the app could know otherwise.

Zarch · 2022-11-26T13:56:00.506Z

Timbones:

On my system I can differentiate heating vs. hot water by monitoring the pumps. Power use can then be attributed accordingly either at input time logging to two feeds, or when processing the data in the app. This does need setting up for each system though; I don’t think the app could know otherwise.

That’s a good shout.

I have a separate CT clamp on my interface module, which in turn fires the hot water pump.
So that could be easily tracked to say “if > 10W” or whatever threshold relates to a hot water run?

CF87 · 2022-11-27T09:36:29.225Z

Great to have some real life data to compare the different makes and models of heat pumps!

It would be good to have a designated space for commenting on each of the installs, so users can ask questions and make observations/ recommendations.

Gavthegas · 2022-11-27T20:39:20.192Z

I would also like this.

Gavthegas · 2022-11-27T20:42:06.365Z

CF87:

It would be good to have a designated space for commenting on each of the installs, so users can ask questions and make observations/ recommendations.

Me too

MyForest · 2022-11-27T22:30:46.417Z

I have a tangential discussion about using this data in other ways so I’ve taken that over to another thread to avoid it polluting this one.

Reviewing other EmonCMS instance data sources Development

Inspired by @Timbones’s nice work over on the dashboard I’ve been looking at ways to explore the data. I know that at the moment each data source also has it’s own EmonCMS wrapped around it and that’s what we’re using to render the data. However, seeing as the data is openly exposed then we could arguably use another user interface. ofc I was looking at using my MMSP experimentation app. Partly because of @TrystanLea’s comment about analyzing the space and DHW heating separately which I’ve alr…

mjr · 2022-11-29T14:56:13.951Z

Timbones:

On my system I can differentiate heating vs. hot water by monitoring the pumps.

Or we can check the OperationMode value from melcloud. Lots of different cat skins.

Zarch · 2022-11-29T15:10:34.747Z

I suppose we’d be looking for the lowest common denominator approach that folk with any make/model of heat pump could use?

If people are invested in emonpi hardware, then a CT clamp on the pump watts could be useful?

AndyS · 2022-11-30T08:49:30.070Z

@Zarch I’m intrigued how you are controlling flow rates on the Arotherm+ as this seems to be firmware control only on the 3.5kW monobloc. My installer added a Grundfos UPS3 in series on the monobloc flow and Live monitor is now recording rates that are way higher than the specified working range of the unit.

Zarch · 2022-11-30T09:00:21.873Z

Might be a better question for the Arotherm thread.

Vaillant Arotherm Owners Thread Sustainable Energy

I thought it might be useful for the Vaillant Arotherm heatpump and its owners to have their own thread. So any questions, queries, things we’ve learnt and performance chatter can go in here. For starters, anyone looking for in depth performance information, this technical document from the Czech Vaillant site is gold. edit: I have uploaded the PDF rather relying on website links that sometimes change. For example, here are the COP and heat output charts for the 5kW model at various flow tem…

Controlling flow rate (using pump speed) is just a setting on the VWZ AI controller.

Conf. heat. build. pump
Conf. cool. build. pump
Conf. DHW. build. pump

The pump speed when heating, cooling or doing DHW can be independently set between 50% and 100% as well as ‘auto’.

AndyS · 2022-11-30T09:05:27.448Z

Many thanks to all who have (and will) contribute to the Dashboard creation and content. This will be a really important public domain resource of real data which can help inform progress towards net zero.
I’ll contribute my PassiveHaus 3.5kW Arotherm+ as soon as I can monitor it without using multiple button presses on the Vaillant controller. Driving me mad, so I’m looking forward to TX4 arriving from shop!

It would be really useful to have some sort of diagramatic system schematic for each instance as well as the details accessible via the + expander. Would it be appropriate to make provision for a system schematic to be uploaded on a voluntary basis and to link it via the + expander?

dMb · 2022-12-08T21:47:37.611Z

I’d be happy to add my system into the public dashboard: an 8kW NIBE F1145 Ground Source Heat Pump (looks like all the others are ASHPs?) that’s about 5 years old.
It’s got a dedicated electrical sub-meter on the input and separate Kamstrup Multical 302 heat meters on the CH and DHW outputs; all three meters are read automatically via MeterBus.
The system is registered with NIBE Uplink and I download temperature and other readings via the Uplink API every 2 minutes, logging everything in a local InfluxDB database for graphing with Grafana.

However, I don’t have an emonpi or local emoncms instance in the mix. Is that a problem - could I just send readings via the API, after grabbing them from NIBE Uplink and reading my meters?

TrystanLea · 2022-12-08T21:54:36.042Z

Hello @dMb it would be great to get your system on there. I assume you dont have an emoncms.org account either? Im happy to create an account for you so that you can share your data free of charge. I will PM you the details. Would you be able to setup some kind of upload to the emoncms.org server from your existing setup?

TrystanLea · 2022-12-08T22:58:01.741Z

Looks like were going to be getting some really good cold weather performance data from the heat pumps over the next few days! Can see outside temperatures on those more inland and further north are quite a bit lower than ours nearer the coast. Lots of variation in flow temperatures as well. Would be interesting to do a table of average outside temps, average flow temps and cop for this cold period.

borpin · 2022-12-09T07:14:09.407Z

dMb:

However, I don’t have an emonpi or local emoncms instance in the mix.

Have you a VM system? Proxmox ideally. If so, just create a local instance of EmonCMS. How are you pulling your data down from NIBE?

dMb · 2022-12-09T08:23:16.128Z

borpin:

Have you a VM system? Proxmox ideally. If so, just create a local instance of EmonCMS. How are you pulling your data down from NIBE?

I’ve got a Docker container installation so could host a local EmonCMS on that - but then I’d have to get the data into that…

I’ve got a combination of Perl and Python scripts that pull the data from the meters and from NIBE Uplink and publish via MQTT. I’ve then got an MQTT subscriber that stores the info in a local InfluxDB instance. Currently thinking to have another MQTT subscriber that pushes to the emoncms,org API - Trystan has setup an account for me so I’ll investigate over the weekend.

borpin · 2022-12-09T08:24:30.518Z

The emoncms.org API doesn’t accept JSON IIRC - @TrystanLea can you confirm?

The local setup doesn’t help that much and Docker is a pest with emoncms. If you had been using Node-RED it would have been straightforward to send the data on.

TrystanLea · 2022-12-09T08:27:16.761Z

The emoncms.org api does accept json, it has matched the local api exactly now for a while. Sorry I realise I didn’t reply when you asked about this last time @borpin.

Il have a look later at what might be a good python script to achieve what you need.

borpin · 2022-12-09T08:29:11.748Z

TrystanLea:

it has matched the local api exactly now for a while

That’s great news. Both Input and Feed APIs?

TrystanLea · 2022-12-09T10:44:42.963Z

yes