Why is the heat pump outlet water temperature set at 55°C - 60°C? What's the mystery?

As an efficient and environmentally friendly heating equipment, the operating efficiency and service life of a heat pump are directly affected by the outlet water temperature. This article will delve into why controlling the heat pump outlet water temperature at 55~60℃ is based on many considerations, including energy saving efficiency, equipment maintenance, adaptation to various heating needs, safety protection, and user experience and comfort.

1. Energy saving efficiency

As the core component of the heat pump, the compressor's load is closely related to the outlet water temperature. When the outlet water temperature rises, the compressor needs to overcome a larger temperature difference to complete the working cycle, which means more energy consumption and a higher risk of mechanical wear. By controlling the outlet water temperature within the appropriate range of 55~60°C, the workload of the compressor can be significantly reduced, energy consumption reduced and its service life extended.

In addition, within the outlet water temperature range of 55~60℃, the heat pump can maintain a high energy efficiency ratio COP, that is, the system energy utilization efficiency is high. This is because within this temperature range, the heat exchange process of the system is more efficient and the heat transfer loss is relatively small, allowing the heat pump to obtain more heat energy output with less electrical energy input. This not only helps save energy and reduce emissions, but also reduces operating costs for users.

2. Equipment maintenance

The impact of water quality on heat pump equipment cannot be ignored. Mineral components in water may precipitate under heating conditions and form scale on the surfaces of pipes and heat exchangers. The presence of scale will greatly reduce heat exchange efficiency, increase water flow resistance, and even damage equipment. Research shows that when the water temperature exceeds 60°C, the scaling phenomenon is significantly intensified.

In addition, the higher the water temperature, the greater the work required by the compressor, the higher the exhaust temperature, and the greater the pressure it will withstand. If the compressor and piping, especially the exhaust pipe, do not have enough pressure resistance, the pipes will burst if the pressure is too high. In order to protect the normal operation of the entire unit, by setting the outlet water temperature within a safe range of 55°C to 60°C, this protection mechanism can be effectively avoided from being triggered frequently, thus ensuring the stability of the system. Therefore, by controlling the outlet water temperature between 55 and 60°C, scale formation can be effectively suppressed, maintenance costs reduced, and long-term stable operation of the equipment ensured.

Security protection

To prevent equipment damage due to abnormally high temperatures, most heat pump units are equipped with over-temperature protection. When the outlet water temperature exceeds the set range, the protection mechanism will be triggered and the unit will automatically shut down. Controlling the outlet water temperature within a reasonable range of 55~60°C can ensure that the unit operates stably within the normal operating parameters and avoids frequent triggering of the protection mechanism due to over-temperature. This stable operating state helps reduce the impact of sudden shutdowns on equipment, prevents system failures caused by excessive temperature fluctuations, and ensures the stability and safety of the system during long-term operation.

User experience and comfort

The hot water temperature of 55~60℃ can meet the needs of most users in daily life and heating. This temperature range ensures indoor comfort while avoiding energy waste caused by too high water temperatures. Excessively high water temperature will not only increase the user's energy costs, but may also cause human discomfort due to excessive indoor temperature. Properly setting the outlet water temperature can not only improve living comfort, but also achieve effective use of energy, which is in line with the concept of green development.

To sum up, setting the heat pump outlet water temperature at 55~60℃ is a well-thought-out technical decision, which takes into account multiple key factors such as energy saving efficiency, equipment maintenance, adaptability to various heating needs, safety protection, and user experience and comfort.