This paper focuses on car park fire safety, more particularly on fire and smoke (and heat) dynamics. The first part deals with the choice of design fire, based on recent full-scale car fire experiments with modern cars and different set-ups. Different aspects of smoke and heat control (SHC) systems are then discussed from the perspective of smoke (and heat) dynamics. The focus is mainly on the effect of horizontal mechanical ventilation, a popular technique, on the smoke and heat, generated by the fire source. Some fundamental differences from (longitudinal) mechanical ventilation in tunnels are described. Possible effects of water (sprinklers, water mist or from a fire brigade intervention), as well as some possible routes for further research, are briefly commented.

This paper presents the results of fullacale 6res in two private motor vehicles conducted under instrameated calorimeter hoods for the Channel Tunnel Safety Unit, Department of Transport. Measurements of beat release rate, temperatures and other parameters of fire severity are given. The results were used for the amesment of the specffition and design of the shuttle wagons and in the subsequent computer modelling alealptiow to analyse the impact of such a lire witbin a shuttle wagon. The fires were well ventilated and allowed to develop f d y before 6refigbthg intervention. Of the two tests the first b d for 17 min with the gas temperature in the rig reaching 1250"~ and with a peak total beat output of at least 7; MW before bepg extinguished be otber burned for 57 mia, witb gas temperatures reaching 1125°C and a peak beat output of 45 MW.

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