Modular chillers

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  • Highlighted products
  • Case studies
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Reduced installation and running costs in chillers

Core component of the HVAC system, a chiller cools the water or brine used to cool and dehumidify air in buildings or industrial processes. It's a factory-assembled unit that cools the water or brine using an evaporator, and has an internal or a remote condenser with appropriate controls. The condenser can be either water-cooled or air-cooled. A chiller based on such a design has a variety of applications, from space cooling to process purposes. 

A typical modular chiller unit uses tandem fixed-speed compressors to provide some part-load capability for the modular system. These units share the same water system to provide cooled or heated water to the building.

Danfoss offers the option of using only one variable speed compressor instead of a fixed-speed tandem in order to better match the capacity requirement of the modular chiller unit.

Why choose Danfoss variable speed compressors for modular chillers?

For the end user:

  • Using the Danfoss inverter compressor solution, the unit will have much better seasonal energy efficiency, providing energy savings all year round. The energy saving potential in both heating and cooling modes is illustrated in the graph below as a function of ambient temperature:

For the OEM:

  • By using one inverter compressor, the design of the unit can be simplified to provide continuous capacity output over the full speed range. The manufacturer can provide flexible options to the end user such as:
    • Full variable speed solution, where all units use variable speed compressors to achieve the best efficiency and modulation.
    • A solution using a combination of variable-speed compressors with other fixed-speed compressor modules, allows a good improvement in energy efficiency whilst remaining cost competitive. 
  • Cost reductions can be achieved because fewer components may be needed, such as multiple fixed-speed compressors, relays, and pressure switches; the amount of piping required will also be less.
  • Modular chiller units using Danfoss variable speed compressor solutions also provide the opportunity for manufacturers to offer an alternative to VRF units.
  • VZH variable speed chiller designs also give manufacturers the opportunity to offer innovative and differentiated solutions which can improve product and brand image, instead of units using traditional on-off compressor technology.

What other benefits are there for your customers when they choose Danfoss inverter compressors?

  • Reduced installation costs: thanks to the more reactive adaptation to cooling demand, the manufacturer or the installer has the possibility of eliminating or downsizing buffer water tanks, with a significant cost saving and reduction in footprint
  • Lower sound level: under part-load conditions, especially during the night, chillers using a variable speed solution will have lower sound levels than traditional on-off compressor systems in both running and start-up periods
  • Short pay-back period: the pay-back period with this innovative technology can also be as little as 2 years for the end customer
  • Lower environmental impact: reduced impact on the environment with R410A refrigerant

The most important benefits for customers

  • Energy savings
  • Reduced installation costs 

Highlighted products

  • if (isSmallPicture) { Danfoss VRJ inverter scroll compressor } else if (isBigColumns) { Danfoss VRJ inverter scroll compressor } else { Danfoss VRJ inverter scroll compressor }
    Inverter scrolls - VRJ

    Danfoss inverter scroll compressor solutions for commercial air conditioning and process-cooling applications. R410A, single units. VSH: first-generation commercial inverter scroll compressors with frequency converter CDS302. VZH: second-generation commercial inverter scroll compressors with frequency converter CDS303. VRJ: first high-tier residential inverter scroll compressors with frequency converter CDS801.

  • if (isSmallPicture) { Danfoss VSH inverter scroll compressor } else if (isBigColumns) { Danfoss VSH inverter scroll compressor } else { Danfoss VSH inverter scroll compressor }
    Inverter scrolls - VSH

    Danfoss inverter scroll compressor solutions for commercial air conditioning and process-cooling applications. R410A, single units. VSH: first-generation commercial inverter scroll compressors with frequency converter CDS302. VZH: second-generation commercial inverter scroll compressors with frequency converter CDS303. VRJ: first high-tier residential inverter scroll compressors with frequency converter CDS801.

  • if (isSmallPicture) { Inverter scrolls - VZH - Danfoss } else if (isBigColumns) { Inverter scrolls - VZH - Danfoss } else { Inverter scrolls - VZH - Danfoss }
    Inverter scrolls - VZH

    Danfoss inverter scroll compressor VZH offers effectiveness and reliability. Over 30% energy savings is possible in rooftops, chillers, close controls etc.

  • if (isSmallPicture) { Reciprocating inverter -  VTZ - Danfoss } else if (isBigColumns) { Reciprocating inverter -  VTZ - Danfoss } else { Reciprocating inverter -  VTZ - Danfoss }
    Reciprocating inverter - VTZ

    Danfoss reciprocating inverter compressors avoid oversized and short cycling systems. The compressor automatically adapts to the current load. By combining an efficient Danfoss Maneurop® reciprocating compressor with a Danfoss Drive, the company provides an innovative and intelligent package that utilizes variable-speed technology to ensure superior efficiency across the entire operating range for precision cooling.

  • if (isSmallPicture) { Turbocor® - TG - Danfoss } else if (isBigColumns) { Turbocor® - TG - Danfoss } else { Turbocor® - TG - Danfoss }
    Turbocor® - TGS

    Danfoss Turbocor model TGS oil free compressors are available in 5 different models ranging from 40 tons to 150 / 140 kW to 540 kW utilizing ultra-low GWP R1234ze or R515B.

Case studies

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