What Is Gas Absorption?

Gas absorption heat pumps are an innovative, high efficiency solution for heating and domestic hot water generation.


Gas Absorption Heat Pumps

Gas absorption heat pumps provide energy-efficient gas-powered heating and cooling systems for commercial, industrial and residential buildings. They can both heat and cool the air in a building, as well as heat the water.

They use the freely-available, plentiful natural energy from the ground, the air and from water and turn it into a higher or lower temperature for building heating or cooling, and for water heating.

The most common heating technologies are typically gas boilers and electric heat pumps. Gas absorption heat pumps combine the benefits of both these systems to provide a reliable, cost-effective and constant energy source.

They are fired by natural or propane gas and don’t use any refrigerants that might be harmful to the environment. Using the earth’s natural renewable energy, they can supply chilled water for cooling in summer and hot water for heating in the winter. They even save space because they are suitable for installation outdoors.

Gas absorption heat pumps achieve a lower carbon footprint and reduce costs. By utilising the free energy found in the environment, they can provide up to 65% additional heat. The highly efficient gas condensing burner, cuts operational costs due to the lower price of gas.

How do gas absorption heat pumps work?

The process is simple. The heat pump extracts heat from the source using a gas burner that employs the generator-absorber heat exchange cycle. Then, for the refrigeration cycle, the pump uses a water and ammonia solution, whereby the ammonia is the refrigerant and the water is an absorber.

Here is the process broken down into stages:

  • Robur gas absorption heat pump process 1
  • Robur gas absorption heat pump process 2
  • Robur gas absorption heat pump process 3
  • Robur gas absorption heat pump process 5
  • Robur gas absorption heat pump process 7

What are the benefits of Gas Absorption?

Gas absorption systems:

  • Improve the energy efficiency class of a building
  • Can be installed outside, saving space
  • Have zoning capabilities
  • Need a smaller electric service
  • Have a low electric consumption
  • Are environmentally friendly
  • Have low running costs
  • Reduce CO2 emissions
  • Do not use compressors

Why Robur?

  • Robur Gas Absorption Heat Pumps can supply hot water up to 140°F (60°C)
  • They can be easily retrofitted to integrate with existing installations
  • They are fully weatherproof
  • They are capable of producing heat, with stable operation, in temperatures as low as -20°F
  • Defrosting takes only a few minutes, with negligible energy requirements
  • They operate quietly
  • They have a long life, being very reliable due to having very few moving parts

ESS is the sole UK provider of Robur Heat Pumps

To find out how they can be of benefit for your building project, please get in touch.

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Gas absorption heat pump - air source