Consider condensation, drainage and non-condensable gases as one process.
The original JINCHEN guidance allows condensation on either side. Vapour flow, connection size, pressure drop and condensate handling determine the assignment. A condensate film forms on the heat-transfer surface and influences the thermal calculation.
Provide steam pressure, superheat if present, cooling-medium conditions and the expected condensate outlet condition. For vent service, identify air or other non-condensable gases and define how they leave the system.
A mixed vapour may condense over a temperature range. Composition and the fraction to be recovered are needed to calculate the duty. Materials must be selected for the vapour, condensate and cooling medium, including trace contaminants.
The existing JINCHEN marine project documents titanium construction for seawater and mixed-gas condensation. This is a specific material selection, not a claim that one material is suitable for every seawater duty.
Shell volume can be considered for condensate collection. Specify vapour inlet, condensate outlet, cooling connections and level-control requirements. Integrated receivers and gas-removal connections require project review.
Explore the process objective and engineering questions for each duty. These are application guidance, rather than customer project references.
Condense reactor or column overhead vapour and remove latent heat into a cooling circuit.
Identify mixture composition, condensing temperature glide, non-condensable gases, vacuum conditions and condensate drainage. Allowable vapour pressure drop may control the channel and connection arrangement.
Condense the lower-temperature refrigerant while evaporating the higher-temperature refrigerant in a separate circuit.
Both sides undergo phase change. Review refrigerant charge, distribution, liquid level, oil management and pressure differential in normal operation and shutdown. The cascade temperature approach affects both stages.
Selection includes sensible cooling and latent heat removal. Vapour pressure loss, condensate drainage and non-condensable gases affect the usable temperature difference and surface performance.
Define the condensing pressure and the required liquid outlet condition separately. Vapour pressure loss changes the local saturation temperature; non-condensable gases can reduce effective heat transfer and require a venting strategy. If subcooling is needed, include its sensible duty and confirm how condensate remains in contact with the effective surface.
Provide both fluids, flow rates, inlet and outlet temperatures, operating and design pressures, allowable pressure drop and material requirements. For an existing installation, include the nameplate and arrangement drawing.