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

@T_im_Norden : Simply put: My heating technician received a written statement from Brötje saying that the system must not be modified under any circumstances, even though he has already done so. Brötje refers to the warranty, which becomes void if the buffer tank is removed from the hydraulics.

Since my hydraulics don’t work the same way as yours, the flow rates still matter ;-)
Anyway, this is about something else, so back to the topic:

after 24 hours, consumption of 32 kWh at an outdoor temperature of -9°C (16°F) including one hot water draw.
COP 3.3
Heat pump ran continuously.

Just as an example regarding efficiency and buffer tanks:
This system has exactly the same setup with the same hydraulics:

So it is definitely possible!
It would be quite surprising if everyone advertised seasonal performance factors over 4.5 and then required a buffer tank that completely destroys efficiency.

Alessandro schrieb:

@T_im_Norden: It’s simple: My heating technician received a written statement from Brötje stating that the system must not be modified under any circumstances, even though he already did it. Brötje refers to the warranty, which becomes void if the buffer tank is removed from the hydraulics.

Since my hydraulics don’t work the same way as yours, it really depends on the flow rates ;-)
Anyway, this is about something else, so back to the topic:

After 24 hours, energy consumption of 32 kWh at outside temperature of -9°C (16°F), including one use of hot water.
COP 3.3
Heat pump ran continuously.

That’s not good at all, my friend! I averaged 28 kWh over the last three days. Not great either...

Bookstar schrieb:

That's not good, my friend! I averaged 28 kWh over the last 3 days. Not great...

But his supply temperature is at 39 degrees Celsius (102°F), right?
@Alessandro

Alessandro schrieb:

It would be quite surprising if everyone advertised an annual performance factor of 4.5 or higher and then required a buffer tank that completely destroys efficiency.

No one claimed it completely destroys it. However, if I install a buffer tank with an energy efficiency rating of C, including standby losses and additional hydraulic balancing, I simply lose efficiency.

Of course, it is stupid of Brötje to severely limit their good heat pump with such a terrible forced hydraulics system...