300l indirect storage with internal and external heat exchanger connected to a 15kW heat pump DHW tank built with a circulation pump The energy department

Bolly® PDC Heat Pump - Revolutionary heat exchanger technology

The Bolly® PDC heat pump boasts a unique heat exchanger technology that revolutionizes hot water production and heating. This patented system is specially designed for heat pump installations and offers many advantages.

Principle of operation:

The Bolly® PDC heat pump is based on the exchange and stratification system. The heated water is partially pushed into the tank from above in proportion to the temperature reached during the heat exchanger. The fresh water coming from the lower part of the tank goes into the heat exchanger. This process results in perfect thermal stratification and ensures the immediate availability of hot water.

Highlights:

• Increased efficiency: COP can be up to 30% higher than of a conventional heat pump.
• Instant hot water: The heat exchanger module fills the upper part of the storage with hot water, so water at the desired temperature is immediately available.
• Reduced energy waste: Only part of the tank needs to be heated, so less energy is wasted .
• Increased comfort: The temperature remains constant and hot water production is faster.
• Environmentally friendly: The Bolly® PDC heat pump consumes less energy, thus reducing carbon dioxide - emissions.
• Longer life: The heat pump switches on and off less, so it will last longer to hold.

The Bolly® PDC heat pump is an ideal choice:

• Those who want to save energy
• For whom comfort is important
• Those who are environmentally conscious
• Those who need a longer-lasting heat pump

Storage capacity: 300l
Actual capacity: 291l
Weight: 60 kg
Diameter with insulation: 650 mm
Height with insulation : 1680 cm
Tilt height (R2): 1810 cm
Maximum tank pressure: 10 bar/90°C
Maximum pressure of heat exchanger: 10 bar/110°C
Insulation: non-removable hard polyurethane foam
Energy efficiency class: A

This type of tank is also available in 500 and 800 liter versions (with energy class A, B, C), if you have any questions, please contact our customer service!

Further parameters in the pictures and downloadable on data sheet.

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Bolly® PDC heat exchanger module - Hot water in minutes

The Bolly® PDC heat exchanger module revolutionizes hot water production. The module loads the heat output into the DHW storage tank from above, so it can provide hot water at the right temperature in minutes. The amount of available hot water depends on the operating time, the temperature of the cold water and the heat output of the generator.

The main feature of the Bolly® PDC heat exchanger modules is that they are able to direct the heat output upwards into the DHW storage, thus providing users with hot water at an optimal temperature after a short period of operation. In this way, the amount of available hot water depends on the actual operating time, the initial temperature of the cold sanitary water and the heat output of the generator, thus guaranteeing flexibility and efficiency.

Providing ideal operating conditions for hydraulic heat pump generators, Bolly® PDC modules ensure the optimal temperature on the primary inlet (55 °C) and on the return side (5 ° C deltaT). The presence of a thermostatic mixer allows users to fine-tune the performance and efficiency during the heating phase.

The operation with the mixer in position "2" is particularly interesting, where the primary temperature is 55 °C, while the DHW production is 50 °C, regardless of the cold water temperature. This means that the power exchanged remains constant until the storage volume is heated, regardless of the initial storage temperature.

The selectable powers of the Bolly® PDC heat exchanger modules (300, 500, 800 kW) provide wide applicability and a suitable choice for all users. These modules are highly efficient and reliable, so they prove to be an ideal choice for meeting domestic hot water needs and contribute to increasing comfort and energy efficiency.