Heat exchange units

A heat exchange unit, suitable for performing heat exchange between first and second fluids at different temperatures, comprising an exchange apparatus provided with a tube bundle, crossed internally by said first fluid, containing means of said second fluid, suitable for housing said exchange apparatus in such a way that at least one portion of said tube bundle is externally surrounded by said second fluid;

• wherein said exchange apparatus comprises a connection means structurally separate from said containing means and to which one end of said tube bundle is operatively connected;
• a collection tank arranged at the end of the tube bundle operatively connected to the connection means;
• and a separating means interposed between said collection tank of the tube bundle and said containing means suited to guaranteeing a fluid seal between said collection tank and said containing means;
• wherein said collection tank comprises a box-shaped structure that is fluid tight relative to said second fluid and said collection tank encloses said connection means;
• wherein said separating means comprises a separation frame, solidly fixed to the collection tank;
• and wherein the exchange apparatus rests on a portion of said containing means weighing it down with its weight and wherein the exchange apparatus is supported by the containing means without further links.