New building heating?

What does "meanwhile" mean? ;) Brine-water heat pumps have existed for 35 years... Your heating system, if properly designed, still works at your design temperature - if this is -20° for you, you would have to design it for that. Lex is right, though - the colder your region (and not what you think, but what the weather maps say), the less efficient the air-water heat pump becomes.

Brine heat pump is then basically with collectors in the garden or as a core drilling, as far as I have informed myself now?

Yep

Hello,

Some posts already deal with the properties of a heat pump. Therefore, I want to clearly point out the efficiency of a heat pump, which is modest to put it diplomatically. One must also distinguish between the air-water heat pump, which has a coefficient of performance around 3, or worse, and the ground-water heat pump with realistic coefficients of performance from 3.3 to 3.8.

To raise the temperature level, the heat pump requires driving energy, which is significantly less than the heating energy delivered by the system. This ratio is also called the coefficient of performance or annual performance factor. An annual performance factor of 3 means that the heat pump delivers three times as much heating heat in a year as it consumes in driving energy. Such an initially positive balance is relativized when the heat pump is powered by electricity. Because only about one-third of the primary energy used in electricity generation reaches the end consumer, the use of a heat pump with a coefficient of performance between 3 and 4 becomes a zero-sum game: the loss in the electricity generation process roughly equals the gain from using the heat pump.

To perform better in an eco-comparison than a gas condensing boiler, the coefficient of performance of the electric heat pump would have to be above 4, a value generally not achieved. Therefore, a heating system with a heat pump has worse CO2 emissions than a good gas heating system. Heat pumps thus require ideal conditions.

The previous explanation is intended to show that even your planner, if you already have one, will be overwhelmed by the subject of heating conception, planning, and implementation. Therefore, today, even for a single-family house, it is necessary to bring an expert on board. This can be an energy consultant or a specialist planner for technical building equipment. Contacts can be obtained through the chamber of engineers, the "Energy Efficiency Experts" portal of DENA, or the German Energy Consultant Network.

[I]Best regards, Erik [/I]

Hello,

some posts already deal with the properties of a heat pump. Therefore, I want to clearly point out the efficiency of a heat pump, which is modest to put it diplomatically. It is important to distinguish that the air-water heat pump has a coefficient of performance (COP) around 3 or lower, and the brine-water heat pump operates with realistic COPs of 3.3 to 3.8.

To raise the temperature level, the heat pump requires driving energy, which is significantly less than the heating energy delivered by the system. This ratio is called the coefficient of performance, also yearly coefficient of performance (seasonal performance factor). A yearly coefficient of performance of 3 means that the heat pump delivers three times as much heat in a year as it uses driving energy. Such an at first glance positive balance is relativized when the heat pump is powered by electricity. Because only about one third of the primary energy used in electricity generation reaches the end consumer; the use of a heat pump with a coefficient of performance between 3 and 4 becomes a zero-sum game: the loss in the electricity generation process corresponds roughly to the gain from using the heat pump.

To perform better in an ecological comparison than a gas condensing boiler, the coefficient of performance of the electric heat pump would have to be above 4, a value that is generally not reached. Therefore, a heating system with a heat pump has higher CO2 emissions than a good gas heating system. Heat pumps thus require ideal conditions...

I have a brine heat pump and in the last operating year a yearly coefficient of performance of almost 5. Other well-planned heat pumps should be able to achieve this as well, especially since my heat pump is rather in the midfield in terms of COP...

Sorry, edit won’t: and it’s not just about the ecological balance you mentioned, but also about the wallet, for which the annual performance factor is already quite practical even with the values you mentioned.