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Optimising transcritical systems for warm climates is a major challenge for the CO2 commercial refrigeration industry. Torben Hansen of Advansor presented five solutions to remove flash gas in hot climates and improve performance of CO2 transcritical systems.
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BLDC water loop systems represent an emerging market in commercial refrigeration. Diego Malimpensa from Carel Industries discussed the viability of this technology advancement with propane and CO2 natural refrigerant systems citing field experiences.
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In his presentation, Venugopal Kandi of Emerson Climate Technologies discussed the viability of hydrocarbons refrigerants in commercial refrigeration applications and the number of components available for such applications, such as the ATEX certified fully hermetic R290 scroll compressor. Kandi also highlighted barriers still to be overcome in order to realise the full potential of hydrocarbons in commercial refrigeration applications.
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Vincente Guilabert presented a case study on Huayi Compressor Barcelona’s new U range R290 low back pressure compressor solution whereby the compressors were able to achieve maximum efficiency in a light commercial ice cream freezer.
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Frigo-Consulting is working to improve the efficiency of CO2 transcritical systems using ejector technology. Erik Wiedenmann presented two installations in Switzerland where energy consumption of the systems were reduced thanks to the improved technology.
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Parallel Session: Commercial Refrigeration Applications 2 |
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Udo Görner, Technical Director at Epta Duetschland, presented EPTAKLIMA solution with optimised efficiency for cooling, heating and air conditioning. The solution is green, competitive, efficient and cost saving for supermarkets and hypermarkets. Based on experiences with this application in Europe, the concept is applicable and beneficial everywhere within CO2 equator. Cost advantages of the system compared with conventional systems are currently under monitoring.
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Danfoss’ Torben Funder-Kristensen covered a range of topics in his presentation, including the 100-year evolution of ejectors, the pitfalls of F-Gas regulation (focus on refrigerants rather than system efficiency), booster and parallel compression, gas and liquid ejectors and the role of educating technicians in furthering system efficiency.
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In his presentation, Embraco’s Marek Zglizynski highlighted the company’s use of hydrocarbons for ultralow temperature cascades applications. Used mainly in the medical and pharmaceutical industry, specifically for lab purposes, the systems must operate in temperatures of -70°C to -90°C. Zglizynski also highlighted Embraco’s special compressor series for ultralow cascade systems (R170), with a special valve design and optimised torque electric motor.
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Christian Heerup of the Danish Technological Institute explained the application of condensing units using CO2 in response to F-Gas and ECO design directives. He said F-Gas regulations targeting small commercial systems were having an impact but that with the successful adoption of CO2 now in supermarkets, scaling down systems sizes and reducing costs are now a necessity.
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