Abbess is up to the task of designing and manufacture of low temperature refrigeration and liquid chiller units to fit a wide range of needs in science and industry.
Our cascade liquid chiller systems are the most flexible closed loop cooling systems that Abbess currently offers. These systems eliminate the high running cost of liquid nitrogen systems and offers precise control across a wide range of temperatures from 150C to -96C. The thermal load can be a thermal plate, finned heat exchanger or a recirculating thermal fluid.
Our liquid chiller systems can be used for a variety of applications:
- Chillers for laboratory devices
- Liquid Chromatography
- Mass Spectrometers
- Genetic sample storage (genomics preservation)
- Large and/or multi-zone insect growth chambers
- Laboratory freezers
The Abbess Instruments Cascade Liquid Chiller System consists of two refrigeration compressors working together to cool an evaporator to temperatures as low as -96C. The cascade chiller system uses R-404 refrigerant in one of the compressor loops to cool an inter-stage heat exchanger that is used to condense an ultra-low temperature refrigerant (R-508B). The ultra-low temperature refrigerant is circulated by the second low stage compressor and vaporized in an evaporator to cool the given heat load. These evaporators can be customer supplied or custom built by Abbess to meet your specific needs. Our most common application is to use a heat exchanger at the evaporator to cool a sealed bath of heat exchange fluid which can then be easily piped to the application’s heat load such as:
- Thermal plates
- Thermal shrouds
- Cold fingers
- Storage coolers
- Storage cabinets
The Abbess -96C Cascade Liquid Chiller System is capable of:
- Temperatures ranging from 150C to -96C oil temperatures
- 4200 Watts of peak useful cooling at 80C peak
- 2700 Watts of useful cooling from 100C to -25C
- 750 Watts of useful cooling from -25 to -86C
Faster ramp rates can be accomplished by pre-cooling a sealed bath of Novec or silicone oil (-96C) or propylene glycol to (-50C) and then pumping the cooled fluid through the heat load. A precooled fluid also allows for better gradients across the load, more versatile plumbing configurations and simple system installation. Pre-cooling the 20 gallons of oil to -96C takes about 4 hours but allows the system to cool a 36 pound(16.3 Kg) aluminum plate from 100C to -96C in about 1 hour.
Our liquid chiller systems come in a variety of sizes and configurations to fit your application.
Chiller and vacuum systems can also be custom configured at sizes ranging from 1 horsepower to 34 horsepower systems and can be designed to operate at low (-40C) and ulta-low (-96C) temperatures. These chillers can be used in conjunction with our vacuum systems to provide space simulation profiles or they can be custom made to provide cooling for a variety of other applications such as medical storage and freeze drying. These systems are entirely customizable and can be sized to cool your product, environment or working fluid to specific temperatures at various rates. Abbess chiller systems can be configured with air or fluid heat rejection with redundant heat rejection options available. Our systems have been proven to be reliable and low maintenance in NASA simulation systems for years and have earned a reputation for quality, performance and, control that is simply unmatched.
Flexible Control and Diagnostic Capabilities
Abbess offers a variety of control and diagnostic packages that can fit your specific application and budget. These control systems could be as basic as a simple thermostatic control or as advanced as a data logging touch screen PC interface capable of integrated system diagnostics. Stand-alone PID Temperature controllers can also be utilized for simple, precise thermal control and profiling.