Heat protection element.

摘要

A heat protection element includes an impermeable intermediate layer (1), e.g. of refractory, heat-insulating material, an inner cooling layer (8) with liquid passages (5,6,7) through which, in use, a cooling liquid flows adjacent the inner surface of the intermediate layer, an outer, porous cooling layer (4) adjacent the outer surface of the intermediate layer and pipework (17) communicating with the passages (5,6,7) and arranged to direct the cooling liquid to a plurality of points on the outer porous layer (4).