Leak detection for coaxial heat exchange - has outer, intermediate and inner coaxial tubes with longitudinal fins projecting radially inwards

摘要

The tube-in-tube heat exchanger comprises three coaxial tubular members fitted one within the other with manifolding at each longitudinal end of the exchanger for the circulation of fluid. A fluid is provided in the intermediate tubular member such that a leak is either the outer or inner tubular members can be detected. Each of the tubular members has integral radially inwardly projecting fins in its bore, the fins of the outer member being in good thermal contact with the intermediate member whose fins, in turn, are in good thermal contact with the inner member such that an effective heat flow path is provided.