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

tomtom79 schrieb:

Today I took some time to compile my data, which I’ve been recording for a year... At first daily, then of course less frequently.

Over the entire year, I actually used only 3791 kWh (3791 kWh) for 250 m² (2690 sq ft) of heated floor area.
The internal heat meter shows about 13,820 kWh (13,820 kWh) of heat generated.

This results in a seasonal performance factor of about 3.7.

I’m quite positively surprised 🙂

Our electricity meter has a network connection port—what do I need it for and what can I see there?

The 3791 kWh (3791 kWh) grid electricity you mention, does that only refer to the heat pump electricity? It cannot be the total annual household electricity consumption.

I have calculated my own annual household electricity consumption from the grid at about 3300 kWh (3300 kWh) over 12 months, with 12 months of photovoltaic generation, 9 months with battery storage, and 2.5 months heating only with the wood stove.

I still don’t quite understand the heat pump. The temperature spread is now okay again, as is the consumption. Let’s see how long that lasts. Yesterday it was somewhere around 12-14 kWh (12-14 kWh) for the heat pump.

Your consumption is really impressive. Yesterday I used three times as much as you, 34 kWh. Water accounts for 6 kWh of that. The rest is heating.

That was yesterday. Today looks similar. The steady blocks around 2.4kW level come from the heat pump, which consumes 2kW per hour.

But as I said, the heat pump is a black box for me. Tomorrow it could perform catastrophically again.

P.S. I reduced the heating cable for the domestic hot water today using a timer. It now only runs between 6-8 a.m. and 3-8 p.m.
It’s crazy how much energy it consumes annually. It runs continuously at 240 watts per hour.

Zaba12 schrieb:

That was yesterday. Today looks similar. The steady blocks at around 2.4 kW level are the heat pump consuming 2 kW per hour.

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But as I said, the heat pump is a black box to me. Tomorrow it could perform disastrously again.

P.S. I have reduced the heating cable for the hot water today using a timer. It now only runs between 6-8 a.m. and 3-8 p.m.
It’s unbelievable how much energy is used annually. Constant 240 watts per hour.

Well, you can see that the heat pump is hardly running at all. That suggests the outdoor temperature is very high or the house is extremely well insulated. It does not indicate a very efficient heat pump, although that could still be the case!

Our heat pump currently runs about 20 hours a day with 4-6 kW output. Otherwise, the house would be cold. The house is built to KfW 55 standard with a very good blower door test, so the building envelope is fully intact.

So it remains somewhat of a mystery 🙂

Maybe Zaba is running a server farm in the building? Or perhaps there are simply more people than average living in the house? The heat produced by human bodies should not be underestimated.

Bookstar schrieb:

Well, you can see that the heat pump is barely running at all. This suggests that the ambient temperature is very high or the house is extremely well insulated. It doesn’t indicate a very efficient heat pump, although that could still be the case!

Our heat pump currently runs about 20 hours a day at 4-6 kW output. Otherwise, the house would be cold. The house is built to KfW55 standard with a very good blower door test result. So the building envelope is completely intact.

So it remains somewhat of a mystery 🙂

Curious... what was your value during the test?