Trigeneration/ Absorption Chillers

Absorption Chillers

Absorption Chillers

Powered by waste heat sources such as exhaust gases, flash steam or hot water, Absorption Chillers are a popular alternative to regular compressor chillers where electricity is unreliable, costly, or unavailable, or where surplus heat is available from a Cogeneration System, Solar or a Boiler.

Trigeneration produces onsite electricity, heating and cooling, delivering environmental and energy savings for over 20 years. We design full turnkey solutions across industries, assuring customer’s satisfaction and peace of mind.

Shuangliang Eco-Energy Systems is a world leading manufacturer of Absorption Chillers with approximately 15% of the world’s market share.  First established in 1982, Shuangliang currently has over 25,000 Lithium Bromide Absorption Chillers in operation around the world.

RANGESizes range from 100 kWr to 11,000 kWr depending on the waste heat available to power the Absorption Chiller. We customise the units according to the site thermal needs.

Simons Green Energy are exclusive distributors of Shuangliang Chillers in Australia.


Produces chilled water for air conditioning cooling, process cooling or inlet air cooling depending on each facility’s requirements.

Fuel Sources: Absorption Chillers are powered by cleaner sources such as waste heat, steam or natural gas.

Consumes far less electricity than conventional air conditioning methods

Flexible design options allows for multiple firing configurations

Helium Pressure Testing

Anti-Corrosion Coating

Dedicated, Automatic Vacuum System

How does an Absorption Chiller work?

Absorption Chillers use two working fluids; Lithium Bromide Salt (LiBr) and a Refrigerant, in this case, water.  The operating principle of an Absorption Chiller is similar to a standard HVAC chiller, except that the electrical energy required to operate a standard chiller through the use of a large pump, is replaced by a generator and an absorber.

Both chambers in the chiller are under vacuum (the top chamber at 1/10 standard atmospheres and the bottom at 1/100 atmospheres), which reduces the boiling point of the water. The absorption chiller also relies on the large amount of heat liberated from the combination (chemical reaction between) of LiBr, which is highly hydrophilic, and Water.

The cooling cycle explained in a step by step process:

1. Generator

Dilute and warm solution enters the higher pressure chamber and is sprayed over a heat exchanger containing the heat source (hot water).  Heat is transferred to the solution and the dilute solution boils, liberating refrigerant vapour and creating a hot concentrated solution.

2. Condenser

The refrigerant vapour created moves to the right, where it is condensed back to a liquid on the cool heat exchanger containing cooling water.

3. Evaporator

The liquid refrigerant enters the low pressure chamber which is under high vacuum.  Due to the vacuum, water in this environment boils at 3.5 degrees.  The liquid refrigerant is sprayed over pipes containing 12 degree (building cooling) water.  The refrigerant boils and reduces the building cooling water to 6 degrees.  This cooling water is then circulated through the building to assist in cooling the building.  The refrigerant vapour liberated from the evaporation moves right to the Absorber.

4. Absorber

The hot concentrated solution (orange) that has transferred its heat to the dilute fluid (pink) enters the absorber and is sprayed into the water vapour saturated atmosphere.  The concentrated solution absorbs the refrigerant vapour creating a dilute solution, which liberates heat to the cooling water that is passing through a heat exchanger in this area.

Sizes Available

    Fuel Sources

    • Exhaust gas (Multi energy) Chillers / Heater
    • Hot water fired Chillers
    • Steam fired Chillers
    • Natural gas fired Chillers/Heaters

    Other Technologies