TÜV SÜD Industrie Service GmbH has installed a new CO2 test rig at its Center of Competence for Refrigeration and Air Conditioning. By introducing the new equipment, the technical services provider is responding to growing demand for testing procedures for refrigeration components using CO2 (R744) as refrigerant. TÜV SÜD operates Europe’s largest independent laboratory for refrigeration and air-conditioning technology in Olching near Munich.
“When combined with our existing test chambers, our new CO2 test rig fulfils all requirements of the standards EN 327 (Forced convection air cooled refrigerant condensers) and EN 328 (Forced convection unit air coolers for refrigeration)”, says Andreas Klotz, Head of the Center of Competence (CoC) for Refrigeration and Air Conditioning of TÜV SÜD Industrie Service GmbH. In addition, the CO2 test rig can be also used for measurement of retail refrigeration units with or without internal expansion valve and condensing units. The rig can handle gas coolers ranging from approx. 10 to 100 kW up to maximum pressures of approx. 100 bar. “We can adjust further pressure and output ranges in line with customers’ concrete requirements”, explain Mirko Herrmann and Martin Breuher from the CoC for Refrigeration and Air Conditioning. The measurement range for forced-convection unit air coolers extends from 3 to 40 kW at air intake temperatures from +10°C to -34°C. Even at evaporation temperatures of -40°C, the upper refrigerating capacity threshold of 40 kW can still be achieved.
It was a particular challenge to achive an optimised connection of the test samples at the test rig taking in account the wide range of speficied values. To meet market requirements for low-pressure products such as forced-convection air coolers and retail refrigeration units, the rig has three pressure levels of 25 bar, 38 bar and 53 bar. When developing the test rig, the experts at TÜV SÜD paid special attention to convenient operation and use. The rig features interfaces for visualisation and programming and for documenting measurement results and transferring them to the measurement program. Its pipework is made of stainless steel throughout to maximise safety. The rig was also designed as a mobile unit for enhanced flexibility.
Laboratory for refrigeration and air-conditioning technology
Olching near Munich is home to Europe’s largest independent laboratory for refrigeration and air-conditioning technology, operated by TÜV SÜD Industrie Service GmbH and covering an area of 8,500 square metres. A major focus of the laboratory’s operations comprises testing of equipment for temperature-controlled transport of foods and pharmaceutical products and for maintaining logistics cold chains. Further services include testing of refrigeration equipment such as retail refrigeration units, ventilation systems and fittings. The tests supplied by the experts at TÜV SÜD ensure that equipment and components conform to the requirements of applicable national and international standards and regulations for safe, fault-free and energy-efficient operation.
For more information about the services available from the Center of Competence for Refrigeration and Air Conditioning of TÜV SÜD Industrie Service GmbH, visit www.tuev-sued.de/climate.
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Press-contact: Dr Thomas Oberst