ASME PTC 12.1 PDF

Description

This Code provides determination of performance of all horizontal & vertical closed feedwater heaters except those with partial pass cooling zones.
Code provides procedures, direction, guidance determining performance closed feedwater heaters regard following: (a) terminal temperature difference (ttd), saturation corresponding steam inlet pressure outlet temperature; (b) drain cooler approach (dca), (c) tube side (feedwater) loss heater; (d) shell desuperheating zone, cooling zone. applies horizontal vertical except partial pass zones. designs zones submerged zones, channel-up designs, only portion passes zones; therefore, two flow streams different profiles. heater designed accomplish heat transfer fluids. design based specific operating condition includes flow, temperature, pressure. constitutes point found manufacturer's specification sheet. not feasible expect test will conducted point. necessary predict adjusting parameters conditions. methods calculating predicted presented code. values shall compared measured values.