Circulation, liquid level and vapour space are central to a stable evaporation system.
The existing JINCHEN application description generally locates evaporation on the shell side, where shell volume and nozzle sizes can accommodate the generated vapour. Plate-side evaporation is considered where justified by the process.
Liquid enters the lower part of the exchanger and a two-phase stream exits toward an external drum or receiver. Natural circulation depends on the available static head and system pressure losses; the exchanger must be assessed with the connected piping and vessel.
The plate pack is submerged in liquid held inside the shell, and vapour leaves from above. Liquid inventory and level control are part of the design. This arrangement is relevant to kettle-type reboilers and steam-generation duties.
The vapour outlet condition and permissible liquid carryover determine separation requirements. Combined evaporator concepts integrate heat transfer and separation within a shell; the arrangement and operating range need project-specific confirmation.
State the refrigerant, oil content, operating pressure, evaporating temperature and secondary-fluid properties. Include freezing risk, minimum load and the required outlet condition rather than selecting from nominal capacity alone.
Explore the process objective and engineering questions for each duty. These are application guidance, rather than customer project references.
Cool a water or glycol circuit through refrigerant evaporation. Flooded and direct-expansion systems require different feed and separation arrangements.
For flooded duty, review circulation and liquid level. For direct expansion, review inlet distribution and outlet superheat. Check freezing risk, minimum flow, part-load stability and oil return in both cases.
Use a heating utility to boil a process liquid or generate a secondary vapour stream.
Review boiling pressure, liquid inventory, vapour disengagement and circulation. Kettle-type integration or an external separator is a system design choice, not an assumed option for every model. Confirm the available configuration during selection.
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.