Heat pump learning resources

Hardware Heatpump
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Thought I would try and collect a list of useful technical learning resources for heat pump system design and optimisation, in particular from those engaged in the discussion here on OpenEnergyMonitor/HeatpumpMonitor, but also material from others like Michael Podesta who engage in a similar open, data led way.

I thought we could link this page from HeatpumpMonitor.org under a learn more tab perhaps…

Please feel free to suggest links below.

HeatpumpMonitor.org findings

What is the goal?

Basic theory

Heat loss calculation:

Heat pump sizing:

Hot water

Hydraulic separation

Installation Videos

Cast study: End-terrace solid stone welsh cottage by @glyn.hudson:

Cast study: 1980s Bungalow Vaillant installation by @glyn.hudson:

Manufacturer specific guides:

Vaillant

Daikin

Mixergy

Monitoring

Comparisons of manufacturer monitoring vs MID metering:

Heatpump dashboard user guides and tips:

HeatpumpMonitor.org data analysis:

Tools

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Do degree-days warrant a mention for heat-pump sizing ? (As a rule of thumb.)

Eg Heating Degree Days:4:Three numbers you need to know about your home | Protons for Breakfast is the last of 4 articles

or Degree Days – An Introduction

or https://tinyeco.com/what-size-air-source-heat-pump-calculator

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Thanks @divenal , added these in!

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Just an idea. There are many useful materials, but some people are not ready to study a lot of them. However, there is a solution. You can create your own ChatGPT trained on these documents and provide users with a link to it.

This can be done easily now, even without programming—just create a GPT and upload the files. Users will be able to ask the AI questions in chat mode and receive answers based on these documents.

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I found this article useful: Sizing UFH systems when using heat pumps

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Thanks for the overview. Just wondering: Could you add a glossary or additional explanation of terms used?
I’ve been trying to locate the conditions this site refers to as “badge capacity” in kW (sometimes also “nominal capacity”) when discussing oversizing and such. I assume badge or nominal refers to “standard rating conditions” according EN 14511-2 (for air-to-water, low temperature regime, this would be A7/W35 with thermostat cranked to max.). Am I right it is EN 14511-2?

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‘Badge’/‘nominal’ capacity refers to the kilowatt value as part of the heat pump model variant, e.g. the “7kW” part of “Vaillant Arotherm Plus 7kW”.

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Just to toss in a further term (which means the same) there are several references to “nameplate capacity”, and I’ve always understood this to mean the manufacturer’s declared Outdoor Unit heat output at A7/W35 at (LWT - RWT) = 5degC, with the compressor running at synchronous speed (normally 50Hz); this latter qualification to cover inverter driven Outdoor Unit compressors which may operate super-synchronously and deliver greater-than-nameplate heat output.

Some time ago I did start an Abbreviations/ Glossary page in Documents (at Terminology — OpenEnergyMonitor 0.0.1 documentation), but this is an initial version that badly needs updating and expanding. Please post any suggestions for improving it - this was on my worklist in any case.

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Aha, Thanks Ecto,
But wouldn’t that make the term (or values) rather meaningless as we don’t know which temperatures and load was assumed? (I do note that most suppliers, here in NL at least, when using “nominal” as term, they are referring to standard rating conditions as EN 14511-2, mostly the LT 35°C regime). Would it make sense to not refer to “badge” but add the actual testconditions? Like ‘x’ kW (@ A7W35,100% load)?

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Dear SarahH,
Thanks for the referral. Where can we post suggestions?

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Right here will do. I keep a “master” copy that I’m updating, and will download an update to OEM in a few weeks.