Cooling Coil for High-efficiency Freezer Rooms

Product Overview

The Cooling Coil is a key component in air conditioning and refrigeration systems, responsible for absorbing heat from air or fluids through refrigerant evaporation. Its design—featuring serpentine tubes and corrugated fins—maximizes heat transfer surface area while minimizing pressure drop. Suitable for low-temperature cooling (-10°C to 25°C) and dehumidification applications, it is engineered to adapt to varying airflow rates and environmental conditions, ensuring consistent system performance.

Product Features

High Heat Transfer Efficiency

The coil’s enhanced fin design (louvered or wavy patterns) increases heat exchange area by 35% compared to flat fins. With a heat transfer coefficient of 3,200 W/(m²·K), it effectively reduces air temperature by 8–15°C in a single pass, depending on airflow velocity (2–5 m/s).

Material Versatility

Available in copper tubes with aluminum fins, stainless steel (304/316) for corrosive environments, or titanium for marine applications. The fin thickness ranges from 0.08mm to 0.15mm, balancing durability and thermal performance.

Dehumidification Capability

When operating below the dew point temperature (typically 10–12°C), the coil removes 10–20 liters of moisture per hour from air in commercial HVAC systems, improving indoor air quality. The drain pan design (slope ≥5°) ensures efficient condensate removal.

Pressure Drop Optimization

The tube layout (parallel or series circuits) is engineered to achieve a pressure drop of ≤0.07 bar at nominal airflow, reducing fan energy consumption by 12–15% compared to standard coils.

Anti-Frost Design

For low-temperature applications (≤0°C), an electric defrosting element (50–500W) can be integrated, activating when frost thickness exceeds 3mm to maintain airflow.

Applications

Commercial Air Conditioning: Used in split AC units and ducted systems for offices, hotels, and hospitals.

Refrigerated Transport: Installed in truck refrigeration units to preserve food during transit (temperature range: -20°C to 5°C).

Industrial Dehumidification: Applied in printing facilities and electronics manufacturing to control humidity (30–50% RH).

Data Centers: Cools server rooms by removing sensible heat (equipment-generated heat) to maintain 18–27°C operating temperatures.

FAQ

Q: How does airflow rate affect cooling coil performance?

A: Higher airflow (4–5 m/s) increases heat transfer but raises pressure drop, while lower airflow (2–3 m/s) reduces energy use but may cause condensate pooling. The optimal range is 3–4 m/s for most HVAC applications, balancing efficiency and operation costs .

Q: What causes coil frosting, and how to prevent it?

A: Frost forms when coil surface temperature drops below 0°C in humid conditions. Prevention measures include adjusting refrigerant flow rate and installing frost sensors that trigger defrost cycles. In critical systems, a hot gas bypass can be added to maintain minimum coil temperature.

Q: What is the service life of a cooling coil?

A: With proper maintenance (annual cleaning, fin straightening), copper-aluminum coils last 8–12 years in standard environments. Stainless steel coils extend to 15–20 years in coastal or industrial areas with high airborne contaminants.