ᐅ Air-to-Water Heat Pump: Current Consumption and Data

Created on: 29 Sep 2020 11:06
B
Bookstar
Hello!
I'll start.
Heated area 200m2 (2,153 sq ft)
KfW 55 standard
Mechanical ventilation with heat recovery
Current outdoor temperature 6°C (43°F)
Heating energy consumption including hot water 35 kWh
Electricity consumption 9 kWh
COP 3.88
Z
Zaba12
9 Feb 2021 19:42
Yesterday, I had one heating cycle more than today. This made yesterday's total house energy consumption a psychologically significant 29.8 kWh. Today, the total house energy consumption will not even reach 23 kWh.
Z
Zaba12
9 Feb 2021 19:43
Bookstar schrieb:

I worked a bit on the plumbing today, let’s see what comes of it 🙂

Looking forward to it. Fingers crossed.
H
halmi
9 Feb 2021 21:32
Zaba12 schrieb:

Yesterday I had one more heating cycle than today. That made the total house consumption yesterday an important psychological 29.8 kWh. Today it won’t even reach 23 kWh total house consumption.

How do you manage that? Our heat pump is already at about 24.5 kWh today, total consumption around 42 kWh.

Supply temperature is about 30 degrees Celsius (86°F), currently -8.2°C (17°F) outside temperature.

Outdoor AC unit in snow with snow layer on the fins at night


Data logger chart: supply, return, outside temperature, domestic hot water – 09.02.2021 21:30
B
Bookstar
9 Feb 2021 21:51
Zaba12 schrieb:
Yesterday I had one more heating cycle than today. That resulted in a psychologically important total house energy consumption of 29.8 kWh. Today, the total house energy consumption will be less than 23 kWh.
Yes, how is that possible? 10 kWh would surely be house consumption, leaving 13 kWh for heating. That can’t be explained.
H
halmi
9 Feb 2021 22:30
Hot water is ready.

App screen: Supply 29.5°C (85.1°F); Return 26.0°C (78.8°F); Hot water 48.7°C (119.7°F); Outside temperature -8.3°C (17.1°F)
T
teh_M
9 Feb 2021 22:34
That actually matches my observations quite well. We currently have a heating demand of 40-50 kWh. The local heating system shows an output of 1.5-2 kW when I check it.
Outdoor temperature averages around -12°C (10°F) over 24 hours.

Additionally, electricity consumption is 8-12 kWh.
With a COP of about 3.5, that fits the data from Zaba quite well.