Feed water heaters are used for heating up main condensate and feed water. This helps to increase the overall plant thermal cycle efficiency. Design of the feed water heaters are based on thermodynamic calculations, using custom made software, and internationally recognized design standards.
Design according to EN standards, ASME code, AD Merkblatt, HEI Standard, TEMA Standard
Heater layout
- Horizontal
- Vertical
- Water chamber upwards
- Water chamber downwards
Internal surfaces arrangement
- De-superheating zone
- Concurrent flow
- Countercurrent flow
- Concurrent and countercurrent flow
- Drain sub-cooling zone
- Full flow pass or partial flow pass for horizontal heaters
- Flooded or non-flooded for vertical heaters
- Condensing zone
Standard design of heat exchangers
LP heaters
- Longitudinally welded stainless steel
- Tube to tubesheet joint – expanded only
HP heaters
- Low alloy steel seamless tubes
- Tube to tubesheet joint – expanded and welded