Heat exchanger

摘要

A heat exchanger for the cooling of water by an airstream comprises a plurality of generally parallel hollow wall members forming vertical passages to be traversed by the cooling air, each wall member consisting of an envelope of thin plastic sheet material provided at the top with an inlet for hot water which is allowed to flow down on the inner shell surfaces in a continuous film of liquid. The envelope opens at the bottom into a pool of water and is sealed against the atmosphere to enable the maintenance therein of air under pressure inflating it against a reinforcing external grid of tensioned cables or the like.