THE Bivalent mode is a heating system in which a heat pump works with another heating source (such as a boiler, furnace or other traditional heating solution). This solution optimizes heating performance, especially when the outside temperature drops so low that the heat pump alone can no longer operate efficiently.
How does bivalent mode work?
Normal operation (heat pump): In mild to moderately cold weather, the heat pump meets the heating needs independently, as it operates energy-efficiently and efficiently under such conditions.
Bivalent point (switchover): The system automatically switches to the other heating source (e.g. boiler) at a preset outdoor temperature – called the bivalent point. This usually happens when the efficiency of the heat pump drops significantly or the outdoor temperature is so low that the heat pump can no longer provide enough heat.
Parallel operation: Some bivalent systems can also operate in parallel, meaning the heat pump and the other heating system operate simultaneously to achieve the best possible efficiency and heating performance.
Advantages of using bivalent mode
- Energy efficiency: The heat pump operates in a temperature range where it makes the best use of energy, while the additional heating system only comes into operation when needed.
- Reliability: The bivalent system ensures that sufficient heat is available even in the coldest weather conditions, as the backup heating system automatically takes over.
- Flexibility: Bivalent systems can be combined with several heating technologies, such as gas, wood, pellet or electric boilers.
- Economy: The system is cost-effective to operate, as the heat pump only operates as long as it is economical and the other heating system only kicks in when needed.
Types of bivalent mode
- Alternative bivalent mode: The heat pump and the other heating system operate alternately, i.e. one switches off when the other starts.
- Parallel bivalent mode: The heat pump and the other heating system operate simultaneously, thus sharing the heating load during the coldest periods.
- Combined bivalent mode: The system switches flexibly between alternative and parallel operation, based on demand and outdoor temperature.
Summary
Bivalent mode is an intelligent and reliable solution that optimizes the performance of heating systems, especially in cold weather conditions. The combination of a heat pump and a backup heating system provides comfortable, energy-efficient and economical heating even in colder climates. With proper planning and setup, bivalent mode offers an efficient and sustainable heating solution in the long term.