| 01 | Candidate A | Industrial chillers
Continuous-duty process cooling | Shell-and-tube or brazed-plate design, selected according to refrigerant, water quality, and operating pressure. | Cooling capacity, evaporating temperature, entering and leaving fluid temperatures, pressure drop, fouling factor, refrigerant type, and design pressure. | Verify: ISO 9001 certificate, pressure-vessel compliance, welding procedure qualification, material certificates, and factory test records. | Request tube or plate material traceability, hydrostatic or pneumatic test procedure, dimensional inspection records, and sample inspection reports. | Choose when lifecycle reliability and stable operation are more important than the lowest initial price. |
| 02 | Candidate B | Commercial HVAC
Comfort cooling and packaged systems | Compact brazed-plate, plate-and-frame, or shell-and-tube evaporator with service access appropriate to the system design. | Rated capacity at stated conditions, water-side pressure loss, minimum flow rate, refrigerant compatibility, approach temperature, and sound or vibration requirements. | Verify: Product drawings, pressure ratings, applicable CE or other destination-market documentation, and refrigerant safety information. | Check brazing or welding consistency, leak-test method, cleanliness standard, insulation arrangement, and packaging protection. | Prioritize verified performance data at the exact operating point rather than catalog capacity alone. |
| 03 | Candidate C | Cold storage
Food and temperature-controlled logistics | Direct-expansion evaporator coil, liquid cooler, or flooded evaporator selected for low-temperature operation. | Coil face area, fin spacing, defrost method, refrigerant circuiting, air volume, frost allowance, operating temperature, and drain-pan design. | Verify: Food-contact or hygiene-related material declarations where relevant, refrigerant compatibility, pressure testing, and corrosion-resistance documentation. | Inspect fin uniformity, tube expansion or brazing quality, coil cleanliness, drainability, and protective coating consistency. | Use wider fin spacing and suitable defrost provisions where heavy frost or frequent door opening is expected. |
| 04 | Candidate D | Data centers
High-availability cooling systems | Chilled-water coil, refrigerant-to-water heat exchanger, or redundant modular evaporator arrangement. | Part-load efficiency, waterside pressure drop, allowable temperature rise, redundancy requirement, control range, leak detection, and maximum allowable downtime. | Verify: Quality plan, pressure-test records, material traceability, factory acceptance test procedure, and documentation for critical spare parts. | Assess production capacity, change-control procedure, serial-number traceability, inspection hold points, and after-sales response process. | Select suppliers able to support identical replacement units and documented configuration control. |
| 05 | Candidate E | Industrial process
Chemical, plastics, and machinery cooling | Shell-and-tube, welded plate, or plate-and-frame evaporator suitable for process fluid characteristics. | Fluid composition, viscosity, solids content, corrosion risk, design pressure, design temperature, heat duty, cleaning method, and allowable pressure drop. | Verify: Material compatibility statement, corrosion allowance, welding qualifications, pressure-vessel documentation, and non-destructive testing scope. | Request PMI or material verification where necessary, weld inspection records, surface-finish data, and replaceable seal specifications. | Pay particular attention to chemical compatibility and cleanability; nominal heat-transfer area alone is insufficient. |
| 06 | Candidate F | Marine and coastal use
Salt-air or seawater-exposed installations | Titanium, Cu-Ni, stainless-steel, or coated construction selected according to seawater chemistry and galvanic-corrosion risk. | Seawater temperature, chloride level, flow velocity, corrosion allowance, galvanic isolation, design pressure, and sacrificial-anode requirements. | Verify: Material certificates, corrosion-resistance data, coating system specification, pressure testing, and applicable marine project documentation. | Review weld quality, tube-sheet protection, coating thickness, passivation records, and packaging for long-distance transport. | Material selection and corrosion control should be evaluated before comparing purchase price. |
| 07 | Candidate G | Heat pump systems
Reversible heating and cooling applications | Refrigerant-to-water plate or shell-and-tube evaporator designed for bidirectional or seasonal operating conditions where applicable. | Heating and cooling duties, refrigerant mass flow, oil return, pressure drop in both modes, freeze protection, minimum water flow, and transient conditions. | Verify: Pressure rating for all operating modes, refrigerant compatibility, design calculations, safety documentation, and test conditions. | Check flow distribution, freeze-resistance provisions, brazing or welding quality, and performance at both rated and part-load conditions. | Confirm that the evaporator is designed for the full operating envelope, not only one nominal cooling point. |
| 08 | Candidate H | OEM integration
Custom chillers and equipment packages | Custom evaporator assembly with dedicated connections, mounting points, sensors, insulation, and control interfaces. | Interface drawings, connection standards, envelope dimensions, center of gravity, tolerances, refrigerant circuit details, and prototype validation requirements. | Verify: Drawing revision control, engineering-change process, prototype test report, inspection plan, and agreed documentation format. | Evaluate engineering communication, 3D modeling capability, sample approval process, first-article inspection, and production repeatability. | Best suited to buyers needing design flexibility and controlled customization rather than an off-the-shelf unit. |
| 09 | Candidate I | Budget-sensitive projects
Standard equipment with repeat orders | Standard shell-and-tube or brazed-plate evaporator using established dimensions and commonly available materials. | Confirmed duty point, pressure drop, standard connection sizes, lead time, minimum order quantity, spare-part availability, and warranty terms. | Verify: Certificate validity, standard test report, product data sheet, warranty exclusions, and destination-country import requirements. | Request a pre-shipment inspection plan, random sampling method, packing list, corrosion protection, and replacement-part pricing. | Compare total cost of ownership, including freight, commissioning, maintenance, and replacement risk. |
| 10 | Candidate J | Export-oriented supply
Projects requiring international documentation | Evaporator selected from a documented product range with export packing, multilingual manuals, and destination-market support. | Performance map, pressure and temperature limits, connection standards, unit weight, customs classification information, spare-parts list, and commissioning requirements. | Verify: Current certificates, declaration documents where applicable, serial-number records, inspection reports, and shipment documentation capability. | Assess export experience, packaging standard, container loading plan, technical support response time, and claim-handling procedure. | Prefer suppliers that provide complete and consistent technical files before purchase-order confirmation. |
