Absorption Chillers – Trigeneration

Shuangliang Eco-Energy Systems is a world leading supplier of Absorption Chillers with a market share of around 15% of the world’s market. Established in 1982, Shuangliang currently has over 20,000 Lithium Bromide Absorption Chillers in operation around the world.

What is an Absorption Chiller?

An absorption chiller is a refrigerator that uses a heat source (e.g., Cogeneration System, Solar, Natural Gas, Biogas) to provide the energy needed to drive the cooling system. These chillers are a popular alternative to regular compressor refrigerators where electricity is unreliable, costly, or unavailable, where noise from the compressor is problematic, or where surplus heat is available (e.g., Cogeneration System, Solar, Boiler).

What is Trigeneration?
Trigeneration is the combination of a Cogeneration system and an Absorption Chiller which converts gas into electricity, heating and cooling. The waste heat from the Cogeneration system is converted into chilled water for air conditioning, refrigeration or other cooling purposes.
On site electricity generated by a Cogeneration and Trigeneration system is cheaper and cleaner than coal-fired grid-supplied electricity. Cogeneration and
Trigeneration thereby provides substantial cost savings, significantly improved energy efficiency and up to 50% lower carbon emissions.
Range
  • 100 kWr – 6950 kWr Absorption Chillers
  • Absorption Chillers Configurations
    • Exhaust gas (Multi energy) Chillers / Heater
    • Hot water fired Chillers
    • Steam fired Chillers
    • Natural gas fired Chillers/Heaters
Benefits
  • Produces chilled water for air conditioning or other cooling requirements
  • Consumes far less electricity than conventional air conditioning methods
  • Absorption Chillers are powered by cleaner sources such as waste heat, steam or natural gas.
  • Reduces carbon emissions

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Shuangliang’s Lithium Bromide Absorption Chillers are available in the following configurations:

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

Shuangliang absorption chiller

  • Manufacturing
  • Commercial and Residential Buildings
  • Universities
  • Hospitals
  • Clubs and Aquatic Centres

 

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