INDUSTRY COMPONENT

Evaporator Coil

Evaporator coil is a heat exchanger component in cooling systems that absorbs heat from the surrounding environment through refrigerant evaporation.

Component Specifications

Definition
An evaporator coil is a critical component in refrigeration and air conditioning systems, typically constructed as a series of tubes or coils through which refrigerant flows. As low-pressure, low-temperature refrigerant enters the coil, it absorbs heat from the air or fluid passing over the coil's external surfaces, causing the refrigerant to evaporate and change from liquid to vapor phase. This heat absorption process cools the air or fluid, making evaporator coils essential for temperature control in industrial cooling applications.
Working Principle
The evaporator coil operates on the principle of phase-change heat transfer. Refrigerant enters the coil as a low-pressure liquid-vapor mixture. As air or fluid flows over the coil's finned surfaces, heat transfers from the warmer medium to the colder refrigerant, causing the refrigerant to completely vaporize. This phase change from liquid to gas absorbs significant latent heat, effectively cooling the air or process fluid. The now-gaseous refrigerant exits the coil to continue through the refrigeration cycle.
Materials
Copper tubes with aluminum fins (most common), aluminum tubes with aluminum fins, stainless steel for corrosive environments, copper-nickel alloys for marine applications. Fins typically 0.1-0.3mm thickness with 1.5-4mm spacing.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Fin Spacing1.5 to 4 fins per cm
Surface Area10 to 100 m² depending on capacity
Tube Diameter6.35mm to 15.88mm (1/4" to 5/8")
Temperature Range-40°C to 10°C
Operating Pressure100 to 500 psi
Refrigerant CompatibilityR134a, R410A, R407C, R22 (phasing out)

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 5149, ISO 9300, DIN 8975, ASHRAE 15

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Refrigerant leakage
  • Frost/ice accumulation
  • Corrosion damage
  • Reduced heat transfer efficiency
  • Compressor damage from liquid slugging
FMEA Triads
Trigger: Corrosion from moisture and contaminants
Failure: Tube perforation and refrigerant leakage
Mitigation: Use corrosion-resistant materials, apply protective coatings, maintain proper pH in water systems, implement regular inspection programs
Trigger: Poor airflow due to clogged fins
Failure: Reduced cooling capacity and frost formation
Mitigation: Install air filters, implement regular cleaning schedules, maintain proper fin spacing, monitor pressure differentials
Trigger: Mechanical vibration and stress
Failure: Tube fatigue cracking at connections
Mitigation: Proper coil mounting with vibration isolators, ensure adequate support spacing, avoid thermal stress through controlled startup

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±0.5°C temperature control, ±2% refrigerant charge accuracy, leak rate < 0.5 oz/year per ASHRAE standards
Test Method
Pressure testing per ISO 9300, leak detection with electronic detectors or bubble solution, thermal performance testing per AHRI 410

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Evaporator Coil

3 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Changzhou Vrcoolertech Refrigeration Co., Ltd.
Jiangsu, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Foshan Ever Heat Exchanger Co., Ltd.
Foshan, Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Miracle
Zhengzhou, Henan, CN
Listed on the company's own website · profile compiled by CNFX from public sources

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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Frequently Asked Questions

What causes frost buildup on evaporator coils?

Frost buildup typically results from low refrigerant charge, restricted airflow, or operating below design temperature. This reduces heat transfer efficiency and can lead to compressor damage if not addressed.

How often should evaporator coils be cleaned?

Industrial evaporator coils should be inspected quarterly and cleaned at least annually, or more frequently in dusty or contaminated environments. Regular cleaning maintains efficiency and prevents microbial growth.

Can evaporator coils be repaired if leaking?

Small leaks in copper tubes can often be brazed, but extensive corrosion or aluminum fin damage usually requires coil replacement. Professional assessment is recommended for leak repairs.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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