Hexonic has introduced asymmetric brazed plate heat exchangers to its offer. The company's engineers designed a smaller exchanger while maintaining the current power of the device. The basic application of the LA21AS exchanger is heating applications - residential heating substations and gas boilers .
Asymmetric brazed plate heat exchangers are designed primarily for heating applications – residential heating substations and gas boilers. The special channel layout ensures maximum heat exchange efficiency on the side with higher flow rate, with minimal pressure drop in the secondary circuit. The biggest advantage of asymmetric heat exchangers is their compact size and the possibility of using pumps with smaller
power in heating installations. In many cases the efficiency of asymmetric heat exchangers can be up to 18% higher compared to standard brazed plate heat exchangers.
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Modern plate design in asymmetric exchangers
The asymmetric plate design allows for independent optimization of the flow of both fluids for savings and maximum thermal efficiency.
The unique design of the plate allows operation in conditions where one of the media has a much larger flow rate.
Main advantages of the asymmetric exchanger:
- Compact size
- Up to 18% higher efficiency
- More capacity
- Reduced refrigerant demand
- Greater heat exchange efficiency
- Possibility of using pumps with lower power
- Low carbon footprint
Main advantages of the asymmetric exchanger plate:
- Corrugated cover plate - additional heating channel
- Smaller water pressure drops - secondary side
- Increased maximum water flow - secondary side
- Greater flow turbulence - primary side
The asymmetric heat exchanger is distinguished primarily by its compact size and the possibility of using pumps with lower power in central heating installations . The smaller size of devices with asymmetric plates allows for their wide application, especially where there is not much space.
Compared to standard brazed plate heat exchangers, the efficiency of asymmetric exchangers can be up to 18% higher – says Wojciech Miciak, Head of Hexonic's Research and Development Department. - The design of the asymmetric plate enables independent optimization of the flow of both fluids, thanks to which users can enjoy maximum thermal efficiency and ultimately save a lot on heating. The asymmetric design of the plate also allows operation in conditions in which one of the media has a much higher flow rate. The special arrangement of the exchanger channels ensures high efficiency on the refrigerant side with minimal pressure drop in the secondary circuit. Therefore, we assume that the basic purpose of the LA21AS exchanger will be gas boilers and residential heating substations – adds Wojciech Miciak.
Where are asymmetric exchangers used?
Residential heating substation
A residential substation, also called a mini-substation, residential station or logoterm, is a compact device providing thermal service in a single residential premises. It transfers heat from a local boiler room or from a heating substation supplied from the municipal heating network to the premises. This solution gives residents of multi-family buildings individual control over the way they use heating and prepare domestic hot water.
The heat exchange process in mini heat exchangers takes place using brazed plate heat exchangers. In this application, asymmetric brazed plate heat exchangers from the L series are used.
Gas boilers
Gas boilers are heating devices that are characterized by high efficiency.
and efficiency. We distinguish several types of boilers.
Dual-function gas boilers
They are designed so that one unit can
heat the building and provide domestic hot water (DHW) heated in a flow system. In the event of a demand for hot water, the boiler will switch to the mode of heating water drawn from the draw-off point, after a while returning to heating the central heating water (CH).
Single-function gas boilers
The basic task of single-function boilers is to heat water in the installation.
what To use this type of boiler for heating domestic hot water, it is necessary to equip
it into a storage heater. The coil located in the heater,
supplied with hot water from the boiler, it maintains the set water temperature.
Both types of boilers can be equipped with a function for recovering heat from exhaust gases, which reduces operating costs. This phenomenon is called condensation, and the boilers are called condensing boilers.
The boiler's operation is possible thanks to the compact heat exchanger placed inside. It is most often an asymmetric brazed plate exchanger. It provides high comfort of use and excellent efficiency of the entire system. Its compact size allows for the limitation of the dimensions of the entire boiler.