Double fluid circuit heat exchanger - has spiral parallel tubes of primary fluid inside container for secondary fluid

摘要

The heat exchanger has a primary circuit of several tubes (5,6,7). These carry the primary fluid and are in parallel and fitted spirally inside a cylindrical cover (1) containing the secondary fluid. The cover is an annular cylinder. Each of the tubes is in contact with the adjacent tube which describes a spiral of greater diameter or with the outer cover wall, and also with another adjacent tube of smaller diameter spiral or the inner cover wall. The secondary fluid flows inside the cover in a direction virtually parallel to the spirals.