TPi November 2018

Products & developments

Efficient solutions for water heating and air conditioning

Wieland Thermal Solutions presented its new products at this year’s Mostra Convengno Expocomfort in Milan, Italy, including the medium-high finned tubes of the GEWA-D brand, made of carbon steel for energy-efficient water heating and solar supply. Solutions for greater efficiency in heat pump systems and a special heat exchanger for boat air conditioning were also exhibited. As a further innovation, highly enhanced titanium tubes were presented that offer reliability in all water qualities and enable higher energy efficiency and a more compact design for shell-and-tube heat exchangers. With the carbon-steel version of the GEWA-D finned tube, Wieland Thermal Solutions offers an energy-efficient way of optimising buffer tanks in solar, heat pump or heat recovery applications. Due to the large outer surface of the finned tube, the heat exchanger has a compact design and enables the energy content of the tank to be maximised. There are no additional costs for the joining technology, as the customer-specific heat exchangers can be welded directly to the steel tank. The finned tubes made of steel can also be used for other applications where heat has to be transferred, such as solid-fuel boilers. Wieland Thermal Solutions recommends direct condensation for efficient water heating in heat pump systems, where the domestic water is heated directly in the hot-water tank by a double-wall safety heat exchanger. Due to the direct contact with the water in the storage tank, the WRKS type heat exchanger operates with small temperature differences, and heat losses are avoided.

WRKS safety heat exchanger for direct condensation in the heat pump storage tank

Compact coaxial heat exchanger made of aluminium-titanium

is individually scalable and reliably withstands high pressures. Wieland Thermal Solutions developed a complex, highly enhanced surface for this material, which is claimed to significantly increase heat transfer performance. This enables particularly compact and efficient shell-and-tube heat exchangers using titanium tubes. For the design of shell-and-tube heat exchangers, the innovative titanium tubes were integrated into the ThermalS design software, which can be made available to Wieland Thermal Solutions

The double-wall finned tube of the WRKS ensures the protection of drinking water against contamination in the event of damage. The GEWA- safe tubes are based on a double-wall tube system with tiny internal channels to promptly detect leaks. The safety solution also corresponds to drinking water protection according to DIN EN 1717 for heat pump systems. With the corrosion-resistant, lightweight and compact coaxial heat exchanger based on a combination of aluminium and titanium, Wieland Thermal Solutions is launching a product that can withstand demanding seawater qualities and offers a small installation footprint. The heat exchanger, which can be used for heating and cooling,

customers free of charge. Wieland Group – Germany

GEWA-D finned carbon steel tube as an alternative for water heating

info@wieland.com www.wieland.com

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TUBE PRODUCTS INTERNATIONAL November 2018

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