Hello,
During the planning of a new heat pump-based heating system, the idea of a bivalent concept came up.
The background was that in reports about domestic hot water heat pumps, the problem of deeply frozen ground was occasionally mentioned, when the heat flow in the ground is significantly restricted during several days of cold weather.
According to the DIN table, the "standard" winter temperatures here are listed as -13°C (9°F). However, I remember experiencing a few days at -16°C (3°F) one or two winters ago.
To bridge such extreme phases, a small gas condensing boiler could be used for additional heating. This should even be possible with propane heating if there is no natural gas pipeline in the neighborhood. Such a propane backup heating system would likely only be used during less than 5% of the winter period, so four 33kg (73 lb) cylinders could cover the winter.
Does anyone have experience with such bivalent heating systems?
During the planning of a new heat pump-based heating system, the idea of a bivalent concept came up.
The background was that in reports about domestic hot water heat pumps, the problem of deeply frozen ground was occasionally mentioned, when the heat flow in the ground is significantly restricted during several days of cold weather.
According to the DIN table, the "standard" winter temperatures here are listed as -13°C (9°F). However, I remember experiencing a few days at -16°C (3°F) one or two winters ago.
To bridge such extreme phases, a small gas condensing boiler could be used for additional heating. This should even be possible with propane heating if there is no natural gas pipeline in the neighborhood. Such a propane backup heating system would likely only be used during less than 5% of the winter period, so four 33kg (73 lb) cylinders could cover the winter.
Does anyone have experience with such bivalent heating systems?
R
RotorMotor8 Oct 2021 10:06Sounds complicated and expensive to me.
With the right sizing of the heat pump, those few days should be manageable, otherwise with an electric auxiliary heater.
With the right sizing of the heat pump, those few days should be manageable, otherwise with an electric auxiliary heater.
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