Absorption machines: STANDARDS & TECHNOLOGY

For over 30 years, CNIM has been using proprietary technology for its heat pumps and absorption cold machines. Our equipment meet high levels of quality and performance.

Our teams are here to advise you in your energy efficiency and to find the best solution adapted to your challenges and your environment.

CNIM’s absorption equipment is designed for energy producers, network operators (heating or cooling), the oil, gas, chemical and petrochemical sectors, the process industries and the maritime companies.

Industrial companies are looking for ways to improve their production processes, reduce their consumption of energy and limit their environmental impacts. By converting low-temperature heat rejection into usable energy, CNIM’s absorption machines reduce the consumption of fossil fuels in industrial production processes. The result is an optimization of the commissioning and operation of their equipment, a reduction in running costs and a lowering of greenhouse gas emissions.

STANDARDS for quality & performance

  • High quality standards (Llyod’s, Bureau Veritas, PED, ASME)
  • Adapted to very demanding environments ((ATEX, maritimized units)
  • Long life time & low operating costs
  • Tailored solutions
Our References


Absorption Machines use thermal energy (steam, hot water, …) as their primary energy source. Mechanical or electrical energy is only required for a couple of small pumps which usually consume about 1% of the cooling load.

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1.            In the evaporator, the liquid refrigerant is colder than the incoming water: it captures the heat from it until it evaporates.

2.            In the absorber, the refrigerant vapor is captured by the LiBr solution. It returns to the liquid state and dilutes the LiBr solution (which then loses its absorption capacity). The heat of absorption is released in the LiBr solution, which in turn transfers it to the cooling fluid.

3.            In the generator, the heat source transfers its heat to the dilute LiBr solution. The refrigerant picks up the heat and evaporates again. The newly concentrated LiBr solution is reinjected into the absorber.

4.            In the condenser, the refrigerant vapor issued from the generator gives its heat to the water which arrives in the exchanger. Thus, the refrigerant liquefies and returns to the evaporator. It captures again the heat of the water, evaporates and thus starts the loop again.

Absorption machines, a green & economic alternative to conventional compression machines

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For more information on absorption technology and our machines, contact CNIM experts.

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