Bivalent mode is a heating system in which a heat pump works together with another heating source (such as a boiler, furnace, or other conventional 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 or moderately cold weather, the heat pump independently covers heating needs, as it operates energy-efficiently and effectively under these conditions.
Bivalent point (switching): At a pre-set outdoor temperature – called the bivalent point – the system automatically switches to the other heating source (e.g., a boiler). This usually happens when the heat pump's efficiency significantly decreases, or the outdoor temperature is so low that the heat pump can no longer provide sufficient heat.
Parallel operation: Some bivalent systems can also operate in parallel, meaning the heat pump and the other heating system run simultaneously to achieve the best possible efficiency and heating performance.
Advantages of using bivalent mode
- Energy efficiency: The heat pump operates within a temperature range where it utilizes energy most effectively, while the supplementary heating system only kicks in when necessary.
- 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 various heating technologies, such as gas, wood, pellet, or electric boilers.
- Cost-effectiveness: The system's operation is cost-effective, as the heat pump only runs as long as it is economical, and the other heating system only intervenes when needed.
Types of bivalent mode
- Alternative bivalent mode: The heat pump and the other heating system operate alternately, meaning one turns off when the other starts.
- Parallel bivalent mode: The heat pump and the other heating system operate simultaneously, sharing the heating load during the coldest periods.
- Combined bivalent mode: The system flexibly switches 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 effective and sustainable heating solution in the long term.