The draft of the European prestandard 17 52, entitled "Ventilation for buildings – Design criteria for the indoor environment" is intended to be a flexible tool for assisting the designer in providing a proper indoor environment for people in ventilated buildings. It specifies how the quality of the indoor environment, comprising the thermal environment, the air quality and the acoustic environment can be expressed.

Dynamic simulation of a seawater-cooled chilling system is performed by using the dynamic models of centrifugal chillers, heat exchangers, seawater and chilled water networks, cooling coil, actuator, sensor, variable-speed pump and DDC controller ofBEMS. The on-line control strategies for the central chilling system are tested and evaluated by using them to control the living chilling system under different AHU dynamic loads in four seasons.

In France, air conditioning of offices is often required especially in areas with high noise levels and in the Mediterranean climates. Evaporative cooling systems appear able to give a cost effective solution to the growing demand for summer comfort: hence, the CSTB and Gaz de France are currently conducting a joint research on the efficiency of such systems. On the basis of a comfort criteria, this have been done by computer simulations taking into account different kinds of systems, buildings, and climatic areas.

This paper deals with the thermal performance of an earth to air heat exchanger for cooling and heating purposes. The cooling system consists of an earth tube buried in the ground through which ambient air is propelled and cooled by the bulk temperature of the natural ground. Fresh or indoor air can be circulated inside the tube. A new, more accurate, transient, implicit, numerical model based on the coupled and simultaneous transfer of heat and mass into the soil and the pipe has been developed.

The Weidmuller hq at West Malling, built in 1994, uses the Swedish passive cooling system Termodeck. We examine the results of in-use system performance tests.