Refrigerant to water heat exchanger

Abstract

A heat exchanger having at least one inner conduit comprising of a second tubular member coaxially disposed within a first tubular member, wherein the second tubular member outer surface is in contact with the first tubular member inner surface. Each of the first and second tubular members is composed of a material with an approximately 0.015 inch maximum wall thickness.

What is claimed is: 
     
         1 . A method for constructing a heat exchanger from a first refrigeration tube, and a second refrigeration tube, the method comprising:
 (a) inserting the first refrigeration tube, including a first inner surface, a first outer surface, and having a first diameter into a second refrigeration tube, including a second inner surface including continuous enhancements formed longitudinally therein, a second outer surface, and having a second diameter; and   (b) expanding the first refrigeration tube within the second refrigeration tube to bring the first outer surface into contact with the enhancements of the second inner surface, thereby forming an inner conduit.   
     
     
         2 . The method of  claim 1  further comprising inserting the inner conduit into an outer conduit. 
     
     
         3 . The method of  claim 1 , wherein step (b) comprises placing an object in the interior of the first refrigeration tube, and mechanically driving the object through the entire length of the first refrigeration tube. 
     
     
         4 . The method of  claim 2 , wherein the object comprises a steel ball attached to a rod. 
     
     
         5 . A method for constructing a heat exchanger from a first refrigeration tube, and a second refrigeration tube, the method comprising:
 (a) inserting the first refrigeration tube, including a first inner surface, a first outer surface, including continuous enhancements formed longitudinally therein, and having a first   diameter into a second refrigeration tube, including a second inner surface, a second outer surface, and having a second diameter; and   (b) expanding the first refrigeration tube within the second refrigeration tube to bring the enhancements of the second outer surface into contact with the first inner surface, thereby forming an inner conduit.   
     
     
         6 . The method of  claim 5  further comprising inserting the inner conduit into an outer conduit. 
     
     
         7 . The method of  claim 5 , wherein step (b) comprises placing an object in the interior of the first refrigeration tube, and mechanically driving the object through the entire length of the first refrigeration tube. 
     
     
         8 . The method of  claim 7 , wherein the object comprises a steel ball attached to a rod.