HEAT EXCHANGER HAVING A COMPACT DESIGN

摘要

Disclosed is a heat exchanger having an economizer configured as a ring of tubes in a periphery of the heat exchanger. The heat exchanger includes a cylindrical flue collector and a manifold at either end of the cylindrical flue collector. The manifold has a plurality of chambers. The manifold can be made of steel or plastic and governs fluid flow rate and direction within a ring of tubes. At least two rings of heat exchanging tubes, an outer ring and an inner ring, are within the cylindrical flue collector. The rings of tubes are concentric with respect to each other.

主权项

1. A heat exchanger comprising:
a cylindrical flue collector; a manifold at either end of the cylindrical flue collector, the manifold having a plurality of chambers; and an inner ring of heat exchanging tubes and an outer ring of heat exchanging tubes within the cylindrical flue collector, wherein the rings of tubes are concentric with each other, sets of heat exchanging tubes being in fluid communication a respective chamber, the sets of heat exchanging tubes having alternating fluid flow direction and configured within the rings of tubes so that fluid flows through all of the sets of tubes and flows around the entire circumfry of each set before outletting from the ring of tubes; wherein the outer ring is an upstream ring of tubes configured to preheat water flowing therethrough; and wherein the inner ring is downstream of the outer ring and configured to transfer additional heat to water flowing therethrough.