Feedwater Heating Condensers and Heat Recovery Exchangers

Feedwater Heating Process Duty

Effective feedwater heating depends on approach temperature, scaling, oxygen control and pressure containment. The exchanger must match the full operating envelope, including startup, peak load, turndown and upset conditions.

The exchanger is rated for cold feedwater and available heat source, including peak load, turndown and utility variation. Condensation temperature, noncondensables, pressure drop and drainage are evaluated together.

Thermal Design Requirements

Reliable sizing requires vapor composition, flow rate, pressure, inlet temperature, target outlet condition, cooling-medium data, allowable pressure drop, fouling expectations and all startup, normal, turndown and upset cases. Sensible cooling, latent heat, temperature glide, noncondensables and condensate subcooling are evaluated together.

Common Heat Exchanger Types

Shell & Tube - U-Tube offers handles thermal expansion, removable bundle option, steam service durability. Plate Exchanger - Gasketed Plate & Frame offers close temperature approach, expandable surface area, compact water heating. Final selection depends on pressure, temperature, fouling, cleanability, utility availability, plot space and required approach temperature.

Process and Operating Benefits

Stable heat removal maintains the required outlet state and supports predictable pressure, separation and production performance.

Materials, seals, surface finish and cleaning access are selected for the process chemistry and operating environment.

Materials and Construction

Materials are selected for steam purity, condensate chemistry, dissolved oxygen, scaling tendency and design pressure. Tube-side velocity, erosion allowance, venting and complete drainage are addressed to protect long-term thermal performance.

Controls and Maintenance

Stable performance depends on coordinated coolant or fan control, noncondensable venting and unrestricted condensate drainage. Temperature, pressure and differential-pressure trends help identify fouling, flooding or utility limitations before recovery efficiency and production capacity are affected.