Gas volume, pressure drop and the possibility of condensation drive the configuration.
Gas-side heat transfer often involves a larger volumetric flow than liquid service. The existing JINCHEN application guidance generally places the gas on the shell side, where the shell and nozzle dimensions can be adapted. The final side assignment is confirmed during selection.
State gas composition, pressure, discharge temperature and flow reference conditions. If cooling creates condensate, include the expected liquid phase and the drainage requirements in the system specification.
Process gas heaters, boil-off gas duties and gas heat recovery require the full operating envelope. Include minimum flow and start-up conditions as well as the nominal point. Available pressure drop is especially important where the gas-side driving pressure is limited.
Indicate the saturation condition and the required temperature margin. If a stream crosses a phase boundary, the duty must be treated as a phase-change process rather than a simple single-phase temperature reduction.
Explore the process objective and engineering questions for each duty. These are application guidance, rather than customer project references.
Remove compression heat before the next stage or condition the suction gas using water, glycol or a compatible cooling circuit.
Review gas composition, pressure loss, dew point and liquid carryover. Cooling can cause condensation, so the exchanger and downstream separator must be considered together.
Warm cold vapour before downstream handling, using a suitable heating utility.
Define the full inlet-temperature range, utility control, startup sequence and differential thermal expansion. Low-temperature toughness and avoidance of local freezing require project-specific review.
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.