ᐅ Air-to-Water Heat Pump – Monoblock or Split System? SCOP / COP
Created on: 13 Jul 2022 17:08
S
schaaaf
Hi,
we are about to commission the shell construction.
The topic of air-to-water heat pumps is still an issue we haven’t resolved, regardless of availability.
Initially, a split system by Ochsner was planned, with the outdoor unit installed on the garage roof. The pipes would run entirely inside the house down to the basement, with a length of about 13m (43 feet), including a 6m (20 feet) vertical rise, which meets Ochsner’s specifications. (The garage roof was chosen because there is enough space for the outdoor unit and it is far enough away from neighbors to avoid noise disturbance.)
Our plumbing and heating installer offered a Kermi x-change dynamic 8 AW E heat pump. The installation would now face the neighbor’s side. The description states that it operates very quietly in whisper mode. I imagine that when they say whisper mode, it means it becomes loud in normal mode – which is when it runs efficiently.
What is the Kermi like in reality? I couldn’t find any pictures on Google, only marketing images from their PR department. I have already seen a few Ochsner units.
I was told that the SCOP value is more meaningful than the COP value alone, which only shows performance under optimal conditions. I once found a website where you could display many heat pumps in a table showing their (S)COP values, but unfortunately, I cannot find it anymore.
we are about to commission the shell construction.
The topic of air-to-water heat pumps is still an issue we haven’t resolved, regardless of availability.
Initially, a split system by Ochsner was planned, with the outdoor unit installed on the garage roof. The pipes would run entirely inside the house down to the basement, with a length of about 13m (43 feet), including a 6m (20 feet) vertical rise, which meets Ochsner’s specifications. (The garage roof was chosen because there is enough space for the outdoor unit and it is far enough away from neighbors to avoid noise disturbance.)
Our plumbing and heating installer offered a Kermi x-change dynamic 8 AW E heat pump. The installation would now face the neighbor’s side. The description states that it operates very quietly in whisper mode. I imagine that when they say whisper mode, it means it becomes loud in normal mode – which is when it runs efficiently.
What is the Kermi like in reality? I couldn’t find any pictures on Google, only marketing images from their PR department. I have already seen a few Ochsner units.
I was told that the SCOP value is more meaningful than the COP value alone, which only shows performance under optimal conditions. I once found a website where you could display many heat pumps in a table showing their (S)COP values, but unfortunately, I cannot find it anymore.
D
Deliverer14 Jul 2022 10:23I agree with hanse.
This already starts with the fact that the previously planned 8 kW is probably about 4 kW too much.
This already starts with the fact that the previously planned 8 kW is probably about 4 kW too much.
E
Energieverbrat18 Aug 2022 09:37There is a difference between monoblock and split systems. With a monoblock, the noise is generated only outside, while in a split system the compressor runs indoors, which can transmit vibrations to the walls depending on the installation.
A monoblock can be installed or replaced in case of failure without the need for a refrigeration technician.
Split units require smaller core drill holes and allow for somewhat longer distances to the heating room, although shorter is always better.
We have a 9 kW Panasonic monoblock with an Evenes SPS600 and Fristar3WP installed, which is essentially a tuned 7 kW heat pump. Both units start with a power consumption of 500 to 600 watts and produce up to 2.4 kW of heat. I did much of the installation myself, and with a budget of approximately 9,000€ (mostly material costs).
The outdoor unit is placed on rubber dampers on a concrete foundation and connected via flexible hoses. This setup is largely noise-free. The interior wall between the utility room and living area is made of 24 cm (9.5 inches) calcium silicate blocks, so no sound is transmitted.
A monoblock can be installed or replaced in case of failure without the need for a refrigeration technician.
Split units require smaller core drill holes and allow for somewhat longer distances to the heating room, although shorter is always better.
We have a 9 kW Panasonic monoblock with an Evenes SPS600 and Fristar3WP installed, which is essentially a tuned 7 kW heat pump. Both units start with a power consumption of 500 to 600 watts and produce up to 2.4 kW of heat. I did much of the installation myself, and with a budget of approximately 9,000€ (mostly material costs).
The outdoor unit is placed on rubber dampers on a concrete foundation and connected via flexible hoses. This setup is largely noise-free. The interior wall between the utility room and living area is made of 24 cm (9.5 inches) calcium silicate blocks, so no sound is transmitted.
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