BITZER HS.95 optimised for low-GWP refrigerants

The HS.95 is one of BITZER’s semi-hermetic screw compressor series with four delivery volume stages in the range of 700 to 1,015 m³/h at 50 Hz, which was developed for use in large commercial and industrial applications. These compressors can be operated with low-GWP refrigerants such as R449A, R448A, R455A and R454C.

Increased efficiency
The new and bigger models of the tried-and-tested HS screw compressor series offer significant efficiency improvements of motors and mechanics, enabling a better system efficiency in full and part load operations than ever before. They are designed for a wide application range like refrigeration, air conditioning, heat pump and marine systems and can be used both in single and parallel compressor systems. In parallel operation systems with for example four compressors, system displacements of 4,060 m³/h can be reached easily.

Intelligent capacity control
The HS.95 capacity control can be performed both with the stepless mechanical capacity control CR or with external frequency inverters. The integrated double-slider technology provides the opportunity to combine Vi (Internal Volume Index) and CR capacity control. The slider position detection SPI (Slider Positioning Indicator) reports the position of the two CR and Vi sliders to the IQ module at all times. The IQ module constantly knows the exact operating conditions of the system due to the on-board high and low pressure sensors and automatically adjusts the Vi to its optimum position. This setting causes a yearly efficiency increase of the HS.95 compressor up to 10 per cent compared to compressors without continuous Vi adjustment, depending on the load profile over the year.

When operating with external frequency inverter, there is a special drive mode in which the double slider is used as a single slider purely for Vi control, thus combining the advantages of speed control and automatic Vi adjustment for maximum system efficiency.

Compressors with volume flows of 910 m³/h and 1,015 m³/h are already available for order, whilst preparations are under way to launch the compressors with volume flows of 700 m³/h and 805 m³/h.

As an independent specialist for refrigeration and air conditioning technology, BITZER is present all over the world: with products and services for refrigeration, air conditioning and process cooling as well as transport, BITZER ensures optimum temperature conditions for trade in goods, industry processes and indoor climate control – always considering highest possible energy efficiency and quality. BITZER is represented all over the world with 72 sites in 37 countries, including its sales companies and production facilities. Trade and service partners included, the BITZER network of manufacturing, development and sales extends to almost all countries in the world. In 2019, 3,800 employees generated a turnover of €808 million; expenditure for research and development totalled €46 million.

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