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Air-conditioning and cooling buildings with heat

Absorption chillers are becoming more compact

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 5C. 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.

Press contact Uwe Milles presse(at)bine.info

About BINE Information Service

Energy research for practical applications

The BINE Information Service reports on energy research topics, such as new materials, systems and components, as well as innovative concepts and methods. The knowledge gained is incorporated into the implementation of new technologies in practice, because first-rate information provides a basis for pioneering decisions, whether in the planning of energy-optimised buildings, increasing the efficiency of industrial processes, or integrating renewable energy sources into existing systems.

About FIZ Karlsruhe

FIZ Karlsruhe - Leibniz Institute for Information Infrastructure is a not-for-profit organization with the public mission to make sci-tech information from all over the world publicly available and to provide related services in order to support the national and international transfer of knowledge and the promotion of innovation. Our business areas: - STN International - the world's leading online service for research and patent information in science and technology - KnowEsis - innovative eScience solutions to support the process of research in all its stages, and throughout all scientific disciplines - Databases and Information Services - Databases and science portals in mathematics, computer science, crystallography, chemistry, and energy technology FIZ Karlsruhe is a member of the Leibniz Association (WGL) which consists of 87 German research and infrastructure institutions.

idw :: 14.08.2012