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Milk Cooling Tank Compatible with Revised F-Gas Regulation Introduced by Wedholms

05-08-2024 12:00 PM CET | Food & Beverage

Press release from: Industrial News Service

Milk Cooling Tank Compatible with Revised F-Gas Regulation Introduced by Wedholms

Milk Cooling Tank Compatible with Revised F-Gas Regulation Introduced by Wedholms

• Wedholms is introducing the first milk cooling tank in the European market to use CO2 as refrigerant in a standard cooling system of the direct expansion cooling type

• Natural refrigerants, such as CO2, will be required under the revised F-gas Regulation, signed into EU law on March 11 this year

• From January 2025, all new self-contained refrigeration equipment, except chillers, installed in the EU must use refrigerants with a GWP (Global Warming Potential) value of less than 150

The first milk cooling tank in the European market to use CO2 as refrigerant in standard cooling systems of the direct expansion cooling type has been introduced by Wedholms. The tank is compatible with the revised F-gas Regulation that will be mandatory in the European Union from January next year.

The DFC 953 range of milk cooling tanks is available for robotic milking with 1-8 robots and with capacity ranging from 3,200 litres to 30,000 litres.

Synthetic refrigerants, such as hydrofluorocarbons, are currently being phased out by the European Union. According to the revised F-gas Regulation, recently signed into EU law, all new self-contained refrigeration equipment, with the exception of chillers, installed from January 2025 must use refrigerants with a GWP (Global Warming Potential) value of less than 150. Existing systems may still be used and repaired for the remainder of their economic life. However, effective from 2032, refrigeration systems using refrigerants with a GWP value above 750, apart from chillers, can no longer be refilled during maintenance and service.

From 2027, further restrictions on the maximum amount of synthetic refrigerants that can be placed in the EU market will be introduced, capping the amount at around 20 million tonnes CO2 equivalent per year. This will increase the price of synthetic refrigerants, making milk cooling tanks with outdated technology more costly to purchase and operate, thus incentivising investments in milk cooling tanks using technology that is more modern and environmentally sustainable.

"Refrigerants that are environmentally friendly are being introduced across the board and milk cooling tanks is no exception. Refrigeration is an essential process in the farming and dairy industries and we need to use processes that work in harmony with the natural environment that we depend on," says Stefan Gavelin, managing director of Wedholms.

Early refrigerants back in favour

The phasing out of harmful refrigerants is a process that has been ongoing for nearly 40 years. During the 1980s, the first evidence of holes in the ozone layer started to emerge. Since then, successive regulatory regimes have heralded new product generations of refrigerants, each less harmful than the previous one.

Early refrigeration systems, back in the 1800s, used natural refrigerants such as CO2, ammonia or hydrocarbons. However, these refrigerants were not practical to use with the manufacturing technology and safety practices used at the time. In the 1930s, freon was introduced, providing effective refrigeration at low pressure while also improving safety.

Freon started to be phased out by the ratification of the Montreal protocol in the 1980s, due to its high ozone depletion potential. Since then, there has been a shift of focus back towards natural refrigerants again. CO2 has a GWP of 1 and an ozone depletion potential of 0, making its environmental impact neutral.

"We are coming full circle, with natural refrigerants once again becoming the norm. CO2 refrigeration requires a high operating pressure, but thanks to technological advancements, such systems have, over the last decade, become viable for both commercial and industrial use, in many different applications."

"At Wedholms, we have chosen to work with CO2 as refrigerant. Ammonia is toxic as well as corrosive; hydrocarbons, such as propane, are flammable. CO2 have none of these disadvantages. In addition, it is readily available in large quantities and at low cost," says Gavelin.

CO2 an effective refrigerant

CO2 is a very effective refrigerant. Its unique properties, both as a vapour and a fluid, ensure high energy efficiency, reducing operating costs significantly. This also enables the use of small components and small diameter lines, minimising the footprint of components and reducing the cost of parts and repairs.

The high energy content of compressed CO2 produces heat as a by-product of the process. This is recovered by the DFC 953 system and used to provide hot water for auxiliary systems.

Direct expansion cooling is the most common type of cooling system. It works on the principle that the temperature of the gas is lowered when the pressure is reduced and the gas expands. The cold gas absorbs heat from inside an enclosed space and releases its heat content on the outside.

Compatible with all milking robots

The compressor of the DFC 953 range of milk cooling tanks operates with frequency control, running at exactly the speed required by the process. A small batch with 20 litres of milk is refrigerated, to exactly the right temperature, just as effectively as a larger ones of 200 litres, avoiding formation of ice in the tank.

The DFC 953 range of milk cooling tanks is compatible with all robot milking machines. A variety of adapter kits is available.

The control system provides a wide range of options for efficient agitation and temperature control as well as advanced alarm functions.

A home consumption button allows users to obtain milk for their own needs.

Thorough cleaning is provided by a spray head, designed to eliminate calcium deposits and bacteria growth across the entire inside of the tank with a powerful water jet.

Press contact
Stefan Gavelin

President & CEO

Mobile: +46 73 390 24 88

P.O. Box 1002 / Visitors: Wahlströms väg 5
SE - 611 29 Nyköping

About Wedholms:

For over 145 years, Wedholms has been a Swedish company with a worldwide view. Wedholms traces its origins to entrepreneur Carl August Wedholm, who founded a company in 1879 in Nyköping, Sweden to manufacture high-quality milk cans. Today, Wedholms has multiple operating units covering manufacturing, engineering, sales and service. The product range consists of milk cooling tanks and silos as well as related aftermarket services. The company's vision is to become a global leader in energy efficient, sustainable milk cooling solutions.

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