Absorption Refrigeration Plants

Capacity Range

We deliver absorption refrigeration plants with refrigeration capacities from 200 kW up to several MW. Have a look at our ‘References‘.

Capacity: 500 kW

Temperature: -13°C

Heat input: Hot Water

Food storage, UK

Refrigeration Temperature

Our plants can produce cooling temperatures down to -60°C, depending on the operating conditions (see page ‘Operating Conditions’).

Scope of Supply

We deliver every scope of supply, from just engineering (see page Engineering, Service) or components (see page ‘Delivery of Components‘) to complete turn key delivery.

Depending on the customer requirements our delivery comprises:

  • Prefabricated modules in a steel frame with heat-exchangers, vessels, pumps, piping, valves and instrumentation inside.
  • Cooling towers, evaporative coolers, or dry coolers.
  • Electrical panel with PLC inside for automatic operation and scada.
  • Thermal Insulation.
  • Cabling.
  • Supervision of works on site during mounting.
  • Commissioning of the plant and instructions for the operators.
  • Support for authorizations and approvals from notified body or governmental authorities.

Heat Pumps

Ammonia absorption machines can also work as heat pumps (AHP). By means of a high level heat input (e.g. 180°C, or direct firing), heat is extracted from a low temperature heat source (e.g. 0°C) and used to increase the water temperature of e.g. a central heating system from 45°C to 55°C. Colibri b.v. has delivered several heat pumps for domestic heating with capacities in the range of 500 kW. (Look at the picture on our page Engineering, Service)

scheme ammonia absorption heat pump cycle
Scheme absorption heat pump cycle, click to expand.

Heat Transformers

Heat transformers (AHT) are another type of ammonia absorption machines. They use medium level waste heat (e.g. 80°C) to provide high level heat (e.g. > 100°C). At lower temperatures, heat rejection to cooling water or ambient air is required. The components used for such machines are the same as those used in heat pumps.

scheme absorption heat transformer working principle
Scheme absorption heat transformer cycle, click to expand.

Kalina Cycle

In a Kalina Cycle a low temperature heat source can be used to produce electricity. The main difference to a Rankine cycle is working fluid, which is an ammonia-water mixture. Except from the turbine all other components are similar to what is used in an ARP and can be delivered from colibri b.v..