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 simlar 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.
What is the goal?
- SCOP versus Pounds and Pence by @Zarch
- Heat Pumps: COP envy is pointless by Michael Podesta.
- Running my heat pump for half the cost of a gas boiler… by @Rachel
Basic theory
- Mass flow rate, Carnot COP equation & radiator output equation.
- An introduction to Hydronics by Michael Podesta.
- Pressure drops and flow rates by @johncantor.
- Flow rate and pressure drop simulator by @johncantor
- Heating simulator, system temperatures, flow rate and heat by @johncantor
- Heating Degree Days:4:Three numbers you need to know about your home | Protons for Breakfast
Heat loss calculation:
- Accurate heat loss calculation in solid stone mid-terrace households by @TrystanLea.
- Measuring air change rates with CO2 sensors by @TrystanLea.
- Air change rate calculation methods by @TrystanLea.
- Estimating the rate of air changes in a dwelling by Michael Podesta.
Heat pump sizing:
- What Size Heat Pump? by @Zarch.
- Hot water cylinder sizing and mixing by @Zarch.
- Deliberately under-sized heat pumps. by Michael Podesta.
Hot water
Hydraulic separation
- No difference from removing a low loss header by Michael Podesta.
Installation Videos
Cast study: End-terrace solid stone welsh cottage by @glyn.hudson:
- How I fitted an Air Source Heat Pump ASHP: Samsung Gen6 5kW
- Air Source Heat Pump 1st Winter Performance 2022-23 in Solid Stone Welsh Cottage
Cast study: 1980s Bungalow Vaillant installation by @glyn.hudson:
- Solid Fuel to Vaillant Air Source Heat Pump: 1980s Bungalow
- 1980’s Solid Fuel Bungalow to Heat Pump Winter Performance Update
Manufacturer specific guides:
Vaillant
- Arotherm Plus Hot Water Modes by @Zarch.
- Vaillant Arotherm Weather Curve Information by @Zarch.
- Why larger Vaillant models can outperform smaller units in the same range by @Zarch.
- Vaillant Heat Pump Controls: Part 1: The heat curves. by Michael Podesta.
- Vaillant Heat Pump Controls: Part 2: Room Temperature Modulation by Michael Podesta.
- Vaillant Heat Pump Controls: Part 3: Formulas and Spreadsheet by Michael Podesta.
- Vaillant Heat Pump Controls: Part 4: The App by Michael Podesta.
Daikin
- Daikin Monobloc heat pump user guide by @deanhalllincoln
- Forum topic: Is an oversized Daikin really a problem?
Mixergy
Monitoring
Comparisons of manufacturer monitoring vs MID metering:
- Forum topic: Vaillant inbuilt monitoring vs MID meters
- Can I believe my Vaillant Heat Pump COP? by Michael Podesta.
Heatpump dashboard user guides and tips:
HeatpumpMonitor.org data analysis:
- Forum topic: HeatpumpMonitor.org: SCOP (Annual) vs "design" flow temperature
- Forum topic: Heat pump oversizing data analysis, see also Is an oversized Daikin really a problem?