Sharing heat pump data, An open heat pump dataset?

Emoncms
52

Here’s a quick go at a one page format that could perhaps be built into some kind of searchable and sortable database?

An EcoDan ASHP case study

  • Building heat loss rate: 205 W/K (SAP assessment), 173 - 192 W/K based on monitoring.
  • Space heating demand: 111 kWh/m2 (SAP assessment)
  • Space heating demand: 8558 kWh (SAP assessment)
  • Floor area: 77m2
  • Approximate location: North Wales, UK
  • Heat loss at design temp: 4.5kW (8866 kWh) (revised down since first assessment)
  • Design temp: -3C
  • Heat output of radiators: 4.5kW (@40C Mean Water Temperature)
  • Type of emitters: Standard K2 radiators
  • Number of zones: 1
  • Type of controls: Single thermostat and manual flow temperature control, typically flow temp set to 32C but increased to 34C or 36C if house is not warming up fast enough. Thermostat turns heat pump off at target temperature.
  • Buffer or low loss header: No
  • Central heating pump model: Wilo Pico
  • Hot water control strategy: Two daily heat up cycles one at 4am, the other at 2pm, heating typically to 42C tank temperature.
  • Legionella protection frequency: 2 weeks (>50C, sometimes 60C).
  • Heat pump model: Mitsubushi EcoDan 5kW (heat) r410a

Room by room heat loss detail:

Room Heat loss Heat output Configuration
Livingroom & Diningroom 1179W 1956W 3x 1200x600 K2’s
Hall 370W 652W 1x 1200x600 K2’s
Kitchen 771W 0W heat from livingroom
Bed 1 473W 557W 1x 1200x500 K2
Bed 2 515W 557W 1x 1200x500 K2
Bed 3 274W 387W 1x 1000x400 K2
Landing 158W 0W heat from hall drifts upstairs
Bathroom 773W 435W heat from hall and other rooms drifts upstairs
Total 4513W 4544W

Full calculation example: https://openenergymonitor.org/heatlossjs/

Monitoring: Class 1 electricity metering of outside unit, inside controller, central heating pump and 3 way valve with an SDM120, Class 2 heat metering with Sontex 440. CT sensor on the immersion heater.

Level 1:

Year Electric consumption Heat output COP
2020 1946 kWh 7615 kWh 3.91
2021 2378 kWh 9643 kWh 4.04

Level 2,3 4:

Profiles shared above & detailed data Emoncms - app view dashboard

System diagram:

image
image1300×959 215 KB

Is there anything else that would be good to add?

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