BOCHUM, Germany - GEA Refrigeration Technologies has approved its semi-hermetic GEA Bock HG and HA compressors for operation with the refrigerant R407F, a more efficient refrigerant, the company said.
Laboratory tests showed that the use of R407F results in a significant increase in the energy efficiency of a system, according to GEA. Even though tests with R407F in deep freezing showed a lower refrigerating capacity than R404A, the power input of the systems also decreased at the same time by about 22 percent.
The new hydrofluorocarbon (HFC) R407F can be compared to R22 in many respects, but requires less system adaptations at retrofittings than other R22 alternatives and has a comparable higher energy efficiency at a significantly lower GWP (compared to other HFC’s), as tests by GEA Refrigeration Technologies have showed.
A disadvantage of R407F – and therefore a parallel to R22 – are the high discharge end temperatures that complicate the use of classic suction gas-cooled semi-hermetic compressors in deep freezing and usually require the use of a cooling fan as well as liquid injection.
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