More and more people decide to thermally modernize their home, but often keep old elements of the heating system, such as radiators. Can old radiators remain unchanged after installing a heat pump?

Changes in Installation Parameters When Installing a Heat Pump

The heat pump as a low-temperature heat source introduces significant changes in the central heating installation. When replacing an old source with a modern heat pump, the reduction in the temperature of the working medium becomes particularly noticeable. It is worth taking a look at the formula for heating power, which indicates that the greater the temperature difference in the supply and return, the lower the mass flow. This is important when selecting a heat pump, and the changes introduced may require additional installation support.

The heating power is the product of mass flow, specific heat of water and the temperature difference between the supply and return of the working medium.

Validity of Technical Data for Radiators

Radiators, with a lower water capacity compared to surface heating systems, require attention when installing a heat pump. The minimum required water supply should be checked and, in case of deficiency, a buffer tank should be provided. Appropriate oversizing of radiators will significantly affect the efficiency of the entire installation. The difference in power supply in radiator installations with a parameter of approximately 55 ℃ and 20 ℃ than in the case of a heat pump results in a reduction in the radiator power by half.

Ensuring Water Quality in the Installation

The quality of water in a heat pump installation is a key element, especially in the case of radiator installations. Metal heat exchangers can generate fine metallic particles that traditional mesh filters cannot retain. Therefore, it is important to include magnetic filters that effectively separate these elements.

Fan coil units and the efficiency of heat pumps

The expert emphasizes that the heat pump is not limited to surface heating systems. Radiators and fan coil units can operate effectively in heat pump installations, provided that the hydraulic system is properly selected and adjusted. Modern heat sources, with their wide range of adjustment options, are ideal for buildings without permanent residents. Automation of heat pumps allows the simultaneous use of low- and high-temperature systems and hybrid operation with other heat sources, such as a gas boiler. Thanks to this, you can achieve full thermal comfort in your home, both in summer and winter, while maintaining the energy efficiency of the system.

Source: Globenergia based on Webinar Wednesday from Panasonic c