Binary cycle engine heat recovery system

Claim 1

IN A SYSTEM FOR RECOVERING WASTE HEAT FROM MACHINES HAVING A LIQUID COOLANT AND HOT EXHAUST GASES; THE STEPS OF: COOLING THE MACHINE WITH THE LIQUID COOLANT AT TELATIVELY LOW PRESSURE AND TEMPERATURE, AND PRODUCING SOME VAPOR FROM THE COOLANT; CONDENSING THE VAPOR IN SEPARATED HEAT EXCHANGE RELATION WITH A SECOND FLUID IN LIQUID PHASE, THE SECOND FLUID, AT PRESSURES NORMALLY EXISTING IN THE COOLANT DURING OPERATION OF THE MACHINE, HAVING A BOILING POINT SUBSTANTIALLY LOWER THAN THE TEMPERATURES NORMALLY EXISTING IN THE COOLANT DURING OPERATION OF THE MACHINE, WHEREBY IT WOULD NORMALLY VAPORIZE AT SUCH TEMPERATURES, AND SAID SECOND FLUID AT THE HIGH PRESSURE NEEDED FOR OPERATION OF APPARATUS AS HEREINAFTER SET FORTH, HAVING A RAISED BOILING POINT AT LEAST APPROXIMATELY AS HIGH AS THE TEMPERATURES NORMALLY EXISTING IN THE COOLANT DURING OPERATION OF THE MACHINE; MAINTAINING THE PRESSURE OF THE SECOND FLUID AT SAID HIGH PRESSURE WHEREBY ITS BOILING POINT IS AT SAID RAISED VALUE, AND HENCE IT CONTINUES TO BE AT LEAST IN SUBSTANTIAL PART LIQUID DURING CONDENSATION OF THE COOLANT; RETURNING THE CONDENSED LIQUID COOLANT TO THE MACHINE; EVAPORATING THE HEATED SECOND FLUID BY HEAT EXCHANGE WITH EXHAUST GASAES FROM THE MACHINE, PRODUCING VAPOR AT SAID HIGH PRESSURE; AND PASSING THE VAPORIZED SECOND FLUID THROUGH APPARATUS AND THEREIN WITHDRAWING HEAT ENERGY FROM THE FLUID.