▁by ▁engine ers ▁in ▁the ▁design ▁work ▁associated ▁with ▁power ▁plants ▁( f oss il ▁or ▁nuclear ), ▁compress ors , ▁steam ▁tur b ines , ▁re fr iger ation ▁systems , ▁and ▁air ▁condition ing ▁equipment ▁to ▁visual ize ▁the ▁working ▁cycles ▁of ▁therm od ynamic ▁systems . ▁ ▁The ▁Mol lier ▁diagram ▁( h – s ▁chart ) ▁of ▁ent hal py ▁of ▁mo ist ▁air ▁versus ▁its ▁water ▁v apor ▁content ▁( h – x ▁diagram ) ▁is ▁equivalent ▁to ▁the ▁Psych rom et rics ▁Chart ▁commonly ▁used ▁in ▁the ▁USA ▁and ▁Britain . ▁ ▁Education ▁and ▁career ▁ ▁After ▁att ending ▁G ymnasium ▁( gram mar ▁school ) ▁in ▁Tri est , ▁he ▁comm enced ▁studies ▁in ▁mathematics ▁and ▁physics ▁at ▁the ▁University ▁of ▁Gra z ▁( A ust ria ), ▁continu ing ▁at ▁the ▁Techn ical ▁University ▁of ▁Mun ich . ▁He ▁presented ▁his ▁first ▁publications ▁as ▁an ▁outside ▁lect urer ▁for ▁The oret ical ▁Mechan ics . ▁After ▁a ▁short ▁st int ▁in ▁Gött ingen , ▁he ▁succeeded ▁Gustav ▁Ze un er ▁in ▁ 1 8 9 7 ▁as ▁Professor ▁of ▁Mechan ical ▁Engineering ▁at ▁the ▁Techn ischen ▁Hoch schule ▁Dresden . ▁His ▁ 1 9 0 4 ▁publication ▁New ▁Graph s ▁for ▁Techn ical ▁Th erm od ynam ics ▁greatly ▁simplified ▁calculations ▁involving ▁therm od ynamic ▁processes . ▁His ▁New ▁T ables ▁and ▁Di agr ams ▁for ▁Water ▁V apor , ▁first ▁published ▁in ▁ 1 9 0 6 , ▁appeared ▁in ▁six ▁further ▁ed itions