Heat transfer system

Claim 1

A HEAT EXCHANGER WHEREIN HEAT IS TRANSFERRED FROM A RELATIVELY HOT GAS SUPPLIED EXCLUSIVELY FROM OUTSIDE OF SAID HEAT EXCHANGER TO A RELATIVELY COOL FLUID WHICH ENTERS THE HEAT EXCHANGER IN LIQUID STATE AND LEAVES THE HEAT EXCHANGER IN SUPERHEATED STEAM STATE, COMPRISING: DUCT MEANS HAVING AN INLET PORTION RECEIVING THE HOT GAS AND HAVING AN OUTLET PORTION FOR DISCHARGING THE GAS, AND TUBULAR CONDUIT MEANS PLACED IN SAID DUCT MEANS AND HAVING A PLURALITY OF SECTIONS CONNECTED IN SERIES RELATION FOR CONDUCTING THE RELATIVELY COOL FLUID THROUGH SAID DUCT MEANS, A FIRST OF SAID SECTIONS BEING PLACED IN SAID OUTLET PORTION OF SAID DUCT MEANS AND PASSED FIRST BY SAID FLUID IN LIQUID STATE, MEANS FOR PUMPING SAID FLUID IN LIQUID STATE AT VARIABLE FLOW RATES INTO SAID FIRST SECTION, ONE OF SAID SECTIONS FORMING A FINAL SUPERHEATER AND BEING PLACED IN SAID INLET PORTION OF SAID DUCT MEANS AND PASSED LAST BY SAID FLUID IN SUPERHEATED STEAM STATE, ONE OF SAID SECTIONS FORMING AN EVAPORAOR WHEREIN THE FLUID IS EVAPORATED, ONE OF SAID SECTIONS FORMING A PRELIMINARY SUPERHEATER PRELIMINARILY SUPERHEATING THE STEAM BEFORE THE STEAM ENTERS SAID FINAL SUPERHEATER, SAID SECTION FORMING AN EVAPORATOR BEING PLACED IN SAID DUCT MEANS UPSTREAM WITH RESPECT TO THE FLOW OF THE HEATING GAS IN SAID DUCT MEANS, OF SAID SECTION FORMING A PRELIMINARY SUPERHEATER.