System for fuel cells

Claim 1

A FUEL CELL SYSTEM COMPRISING: A FUEL CELL MODULE ADAPTED TO RECEIVE AND REACT AMMONIA AND AN OXIDANT TO PRODUCE ELECTRIC CURRENT AND A HEATED EXHAUST PRODUCT CONSISTING ESSENTIALLY OF UNREACTED AMMONIA, NITROGEN AND WATER; AN OXIDANT SUPPLY OPERATIVELY CONNECTED TO SAID MODULE AND SUPPLYING OXIDANT THERETO; AN AMMONIA SUPPLY; A COMPRESSOR; A FIRST HEAT EXCHANGER HAVING FIRST AND SECOND INDEPENDENT CONDUITS PASSING THERETHROUGH, SAID FIRST CONDUIT BEING CONNECTED AT ONE END IN SERIES WITH SAID MODULE AND RECEIVING SAID HEATED EXHAUST PRODUCT THEREFROM, SAID FIRST CONDUIT BEING CONNECTED AT THE OTHER END THEREOF IN SERIES WITH SAID COMPRESSOR, SAID SECOND CONDUIT BEING CONNECTED AT ONE END THEREOF IN SERIES WITH SAID AMMONIA SUPPLY AND BEING ADAPTED FORM CONNECTION, AT THE OTHER END THEREOF, TO A SECOND HEAT EXCHANGER; A SECOND HEAT EXCHANGER HAVING FIRST AND SECOND INDEPENDENT FLUID CONDUITS PASSING THERETHROUGH, SAID FIRST CONDUIT OF SAID SECOND EXCHANGER BEING CONNECTED AT ONE END THEREOF TO SAID OTHER END OF SAID SECOND CONDUIT OF SAID FIRST HEAT EXCHANGER AND AT THE OTHER END THEREOF, TO SAID MODULE AND SUPPLYING WARM AMMONIA VAPOR THERETO; SAID SECOND CONDUIT OF SAID SECOND HEAT EXCHANGER BEING CONNECTED AT ONE END THEREOF IN SERIES WITH SAID COMPRESSOR AND AT THE OTHER END THEREOF TO SAID AMMONIA TANK; MEANS OPERATIVELY ASSOCIATED WITH SAID FIRST HEAT EXCHANGER FOR WITHDRAWING CONDENSED WATER THEREFROM; AND MEANS OPERATIVELY ASSOCIATED WITH SAID AMMONIA TANK FOR VENTING NITROGEN THEREFROM.