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Absorption chillers are becoming more compact
21.06.2012

Air-conditioning and cooling buildings with heat

The economic and ecological success of heating networks and large-scale solar thermal systems very much depends on a reliable heat output during the summer months. This makes the cooling and air-conditioning of buildings using thermally operated chillers an increasingly interesting market. The new BINE-Projektinfo brochure “Cooling with heat” (07/2012) presents a new generation of particularly compact absorption chillers with small outputs for cooling, air conditioning and heating operations.

In addition to their weight and dimensions, the new plants also impress though their improved utilisation of existing heat. This increases the temperature difference in the circuits of the respective driving heat systems. The researchers developed two units with 50 and 160 kW cooling capacities. The smaller one has been tested in practice in a building since 2011, whereas the larger one is currently beginning the practical testing. The single-stage systems use water as the cooling medium and lithium bromide as the absorber, and can generate cold water temperatures as low as 5°C. Both plants are modularly designed using twin-container systems and can be easily disassembled and reassembled on site. The chiller can also work as a heat pump during the winter months. This enables district heating to be used more efficiently.

A wide-ranging field test is starting in autumn 2012, which is particularly aimed at gaining knowledge about the system network. Fifteen installations throughout Germany will be monitored for five years in order to gain data that will enable the systems to be optimised and launched on the market at a later date. The project forms part of the EnEff:Wärme research programme conducted by the German Federal Ministry of Economics and Technology.

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Air-conditioning and cooling buildings with heat

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