Absorption refrigeration apparatus and method

Claim 1

A METHOD OF OPERATING AN ABSORPTION REFRIGERATION SYSTEM OF THE TYPE INCLUDING AN EVAPORATOR, AN ABSORBER, A GENERATOR, AND A CONDENSER CONNECTED TO PROVIDE A CLOSED REFRIGERATION CIRCUIT; MEANS FOR CONDUCTING RELATIVELY DILUTE SOLUTION FROM SAID ABSORBER TO SAID GENERATOR, MEANS FOR CONDUCTING RELATIVELY CONCENTRATED SOLUTION FROM SAID GENERATOR TO SAID ABSORBER, COMPRISING THE STEPS OF SUPPLYING A HEATING MEDIUM TO THE GENERATOR IN HEAT EXCHANGE WITH THE SOLUTION THEREIN; VARYING THE SUPPLY OF SAID HEATING MEDIUM IN RESPONSE TO THE COOLING LOAD; CIRCULATING A RELATIVELY FIXED QUANTITY OF COOLING WATER IN A CLOSED CIRCUIT TO SAID ABSORBER AND CONDENSER IN SERIES FLOW; CONTROLLING THE TEMPERATURE OF THE COOLING WATER IN SAID COOLING WATER CIRCUIT IN RESPONSE TO THE TEMPERATURE OF COOLING WATER ENTERING THE ABSORBER TO MAINTAIN THE TEMPERATURE AT SOME PREDETERMINED VALUE; MEASURING THE TEMPERATURE OF THE RELATIVELY CONCENTRATED SOLUTION CONDUCTED FROM SAID GENERATOR TO OBTAIN AN APPROXIMATE INDICATION OF THE CONCENTRATION OF SAID SOLUTION; AND RAISING SAID PREDETERMINED TEMPERATURE VALUE OF SAID COOLING WATER AS SAID SOLUTION TEMPERATURE DROPS.