AN A320 FLT CREW; DISPATCHED WITH ONE PACK INOP; LOSES THE SECOND PACK IN CRUISE. THEY DECLARED AN EMERGENCY AND RETURNED TO DEP ARPT.

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DISPATCHED WITH #1 PACK INOP. AT CRUISE ALT; LOST #2 PACK. ECAM MESSAGE PACK #1 AND #2 FAILURE. EMER DSCNT TO 10000 FT; DONNED MASKS; NOTIFIED ATC; ADVISED FLT ATTENDANTS. EMER DSCNT TO 10000 FT CABIN ALT MAX AT 13500 FT. NO MASKS IN BACK DEPLOYED. OVERWT LNDG IN ZZZ1 (RETURNED TO ZZZ1) CFR TRUCKS TO MEET ACFT; LANDED LONGEST RWY. LANDED 7600 LBS OVERWT UNEVENTFUL LNDG. THIS WAS THE SECOND EMER DECLARED IN 3 DAYS. LOST HYDS OUT OF ZZZ2 2 DAYS PRIOR AND DIVERTED TO ZZZ3 WITH OVERWT LNDG. FO AND MYSELF FRAZZLED ON ARR BACK TO ZZZ1. COULD NOT BELIEVE 2 EMERS DECLARED IN 3 DAYS. UPON DISCUSSION WITH FO; WE THOUGHT IN THE INTEREST OF SAFETY WE SHOULD NOT CONTINUE ON TO ZZZ4; IN A NEW ACFT; WHERE WE WOULD BE LNDG AT XA00 OR XB00 IN THE MORNING. BOTH OF US WERE UP IN ZZZ3 ON OUR LAYOVER AT XA00 AM AND KNEW BY THE TIME WE WOULD LAND IN ZZZ4 WE WOULD BE EXHAUSTED; ESPECIALLY AFTER THE PRECEDING EVENTS. TALKED TO FLT DUTY MGR WHO ADVISED US THAT A SYS CTLR WAS VERY UPSET WE WERE NOT CONTINUING ON TO ZZZ4. I WAS SHOCKED WE WERE NOT GETTING A 'JOB WELL DONE' BUT BEING CHASTISED FOR LEAVING THE PAX IN ZZZ1. SPOKE TO ASSIST CHIEF PLT IN ZZZ1 WHO WAS EXTREMELY SUPPORTIVE AS WELL AS THE ZZZ4 CHIEF PLT WHO WAS EXTREMELY SUPPORTIVE. CALLED SYS SCHEDULER IN ZZZ1 TO EXPLAIN SAFETY OF MY CREW AND PAX IS MY #1 PRIORITY AND I WAS SORRY FOR THE SITUATION BUT ONCE AGAIN I WAS EXHAUSTED AND IN NO FRAME OF MIND TO CONTINUE ON TO ZZZ4.