---
title: "Evaporator Coil"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:EVAPORATOR_COIL"
  data_integrity_hash: "7133367132b457a8d76e1efa70b12b00"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:EVAPORATOR_COIL"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/evaporator-coil.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/evaporator-coil"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.3-4.2 MPa (3-42 bar) refrigerant pressure, -40°C to 120°C surface temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 27.6
    unit: "MPa"
    consequence: "Thermal fatigue from cyclic stress exceeding copper's endurance limit (89 MPa at 10⁷ cycles) due to 35°C-85°C daily temperature swings"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Refrigerant undercharge below 70% of design mass causing 15°C superheat increase"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install liquid line sight glass with 85% fill indicator and sacrificial zinc anodes at tube-fin joints"
  - node_2:
      trigger: "Airflow reduction below 0.15 m³/s per kW cooling capacity"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement adaptive defrost cycle triggered by 2.5 kPa differential pressure across coil"
bom_nodes:
  tubing:
    type: "component"
    urn: "URN:CNFX:ME:TUBING"
    interface_type: "physical-logic-coupled"
  fins:
    type: "component"
    urn: "URN:CNFX:ME:FINS"
    interface_type: "physical-logic-coupled"
  headersdistributors:
    type: "component"
    urn: "URN:CNFX:ME:HEADERSDISTRIBUTORS"
    interface_type: "physical-logic-coupled"
  u-bendsreturn-bends:
    type: "component"
    urn: "URN:CNFX:ME:U_BENDSRETURN_BENDS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/evaporator-coil.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "a0316291acbd63f478908aa7771efd0897fc4f56d142714780d62868b6b172c9"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Evaporator Coil

## 1. Technical Definition
A heat exchanger component in a climate control system where refrigerant evaporates, absorbing heat from the surrounding air.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.3-4.2 MPa (3-42 bar) refrigerant pressure, -40°C to 120°C surface temperature**. Failure boundary: **Copper tube burst pressure 27.6 MPa (276 bar) at 20°C, aluminum fin yield stress 110 MPa at 150°C**, Mechanism: **Thermal fatigue from cyclic stress exceeding copper's endurance limit (89 MPa at 10⁷ cycles) due to 35°C-85°C daily temperature swings**.

### 2.1 Analytical Physics Model
Governed by the **LMTD Logarithmic Mean Temperature Difference**:

> **Primary Equation**: $Q = U \cdot A \cdot \Delta T_{lm}$  
> **Engineering Impact**: Sizing validation for pasteurization and cooling tunnels.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| U | Heat Transfer Coeff | Engineering Constant |
| A | Area | Engineering Constant |
| \Delta T_{lm} | LMTD | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Refrigerant undercharge below 70% of design mass causing 15°C superheat increase | 8 | Localized dry-out with 200°C hotspot formation and copper-aluminum galvanic corrosion at 0.5 mm/year | Install liquid line sight glass with 85% fill indicator and sacrificial zinc anodes at tube-fin joints |
| Airflow reduction below 0.15 m³/s per kW cooling capacity | 8 | Frost accumulation exceeding 5 mm thickness with 40% heat transfer reduction | Implement adaptive defrost cycle triggered by 2.5 kPa differential pressure across coil |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Refrigerant Recovery System**, **Tube Bending Machine**, **Leak Detection System**  
**Downstream Applications**: Residential Air Conditioners, Commercial Refrigeration Units, Automotive HVAC Systems  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What are the main advantages of copper-aluminum evaporator coils in industrial applications?
**A**: Copper-aluminum evaporator coils offer excellent heat transfer efficiency, corrosion resistance, and durability. Copper provides superior thermal conductivity while aluminum reduces weight and cost, making them ideal for demanding industrial climate control systems.

### Q: How do I select the right evaporator coil for my machinery cooling system?
**A**: Consider your system's refrigerant type, required cooling capacity (BTU/hr), operating pressure, space constraints, and environmental conditions. Consult manufacturer specifications for tubing diameter, fin spacing, and material compatibility with your existing HVAC components.

### Q: What maintenance is required for industrial evaporator coils?
**A**: Regular cleaning to prevent fouling, inspection for corrosion or leaks, checking refrigerant levels, and ensuring proper airflow. In manufacturing environments, additional protection may be needed against chemical exposure or particulate contamination.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Evaporator Coil](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/evaporator-coil)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: EVAPORATOR_COIL | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: e1651740
