HEAT EXCHANGER FOR FUEL CELL POWER PLANT REFORMER

摘要

A heat exchanger (2) uses the heat from processed fuel gas (10, 24) from a reformer for a fuel cell to superheat steam (40, 56), to preheat raw fuel (58, 70) prior to entering the reformer and to heat a water-steam coolant mixture (28, 38) from the fuel cells. The processed fuel gas temperature is thus lowered to a level useful in the fuel cell reaction. The four temperature adjustments are accomplished in a single heat exchanger with only three heat transfer cores. The heat exchanger is preheated by circulating coolant and purge steam from the power section during startup of the latter.