30 May 2005

LOW-ENERGY COOLING TECHNOLOGIES— IEA ENERGY CONSERVATION IN BUILDINGS AND COMMUNITY SYSTEMS


The aim of IEA ECBCS Annex 28 was to investigate the feasibility and provide design
tools/guidance on the application of alternative cooling strategies to buildings. Outputs from the
Annex include a review of the technologies, early design guidance, detailed design tools, and case
study descriptions. The scope was limited to the technologies included in the Annex. The information
provided reflects the state of the technologies in a country or countries that participated in the Annex
and should not be taken as representative of the situation on a world wide basis.
Ten countries participated in the Annex. The technologies varied from night cooling through natural
ventilation and slab cooling to desiccant cooling and aquifers. This paper presents some of the
buildings that illustrated the various cooling technologies through demonstrated case studies. The case
study buildings are located in countries with different climatic conditions. The temperatures and
relative humidity of the outside air gives different prerequisites for the studied technologies. The
suitability of a technical alternative is thus often dependent on the location of the building.