I am interested in knowing how PV ELITE treats the heat exchanger with varying temperature along its length. For a case with one fixed tubesheet at 500 deg C and another floating tubesheet at 300 deg C, I would like to know the correct way of feeding data in PV elite to analyse as per UHX of ASME Section VIII dIV. 1

Note: ASME allows to have different design temperatures for different parts

See my reply to your duplicate post in other forum.