Category: Industrial Dehumidifier

In today’s world, cold storage are the backbone of various industries. It helps to preserve goods by storing them in a controlled temperature climate. But, high humidity inside the cold room can be a spoiler. We will understand here why a cold storage dehumidifier is essential. However, as straightforward as their function might seem, managing a cold storage environment is anything but simple. Here comes the role of a cold room dehumidifier.

Professionals often face a significant challenge within these icy confines: controlling humidity levels. Humidity in cold rooms, or the amount of moisture in the air, is a fluctuating factor heavily influenced by various conditions like external temperature, the frequency of door openings, and even the quality of room insulation. When not managed properly, it can disrupt the balance these rooms strive to achieve, resulting in product damage and infrastructural complications.

But why is there such a prevalent humidity issue in these cold environments? This blog will help you understand the science behind high humidity challenges in cold rooms. Also, it will suggest innovating cold storage dehumidifier solutions to control humidity.

Why is there high humidity in cold rooms? 

By their very design, cold rooms are meant to keep temperatures low, preserving the products’ integrity. However, high humidity within these spaces might seem paradoxical. After all, one would assume cold rooms to be dry. The possible reasons of high moisture and why we need cold storage dehumidifier are as follows:

• Incomplete Air Circulation:

Cold rooms, especially when packed with products, sometimes suffer from stagnant spots where air doesn’t circulate efficiently. This lack of circulation can result in pockets of higher humidity, as the moisture isn’t evenly distributed and removed.

• Release of Moisture from Stored Products:

Certain products, especially perishable items like fruits and vegetables, naturally release moisture over time. As this moisture is released within the confined space of a cold room, it can contribute to elevated humidity levels unless adequately managed.

• Inadequate Insulation and Vapor Barriers:

A well-insulated cold room is essential not just for maintaining temperature levels but also for preventing humidity spikes. Poor quality insulation will increase humid air infiltration from outside and lead to condensation. A cold room dehumidification system can be an effective tool in avoiding condensation.

• Routine Operations:

Tasks like cleaning, where water might be used, or introducing new products can inadvertently introduce additional moisture to the room. If this moisture isn’t managed or removed promptly, it can lead to a steady rise in humidity over time.

Why is there a need for dehumidification in Cold Rooms?

Cold rooms, though primarily designed for temperature control, often face challenges from excessive humidity. While maintaining a relaxed environment is paramount, balancing humidity is equally crucial. Below are the compelling reasons that underline the importance of dehumidifiers in cold rooms:

Prevention of Mold and Mildew Growth:

One of the foremost concerns arising from unchecked humidity is the growth of mold and mildew. High humidity fosters the growth of mold and mildew, which can contaminate products. At the same time, high moisture inside the cold room can damage infrastructure.

Avoiding Ice Formation:

Excessive humidity in cold rooms can lead to frost and ice accumulation. This process will make the floor slippery and compromise safety. Ice formation also affects the efficiency of cooling devices. 

Preserving Product Quality:

When storing items, especially perishable goods, moisture becomes an enemy. An overly humid environment can accelerate product degradation or decay, shortening their shelf life and leading to unwarranted losses.

Optimizing Energy Efficiency:

Excessive humidity in cold storage demands more from refrigeration systems, leading to increased energy consumption. Humidity can force refrigeration systems to work harder than necessary. A dehumidifier for a cold storage room eases the strain on cooling devices by drying rooms. 

Ensuring Structural Integrity:

Constant exposure to high humidity can erode and damage the cold room’s structure, including walls, floors, and ceilings.

Maintaining Operational Consistency:

Equipment and machinery within cold rooms can malfunction or operate sub-optimally in high humidity conditions. Cold room dehumidification system ensures the durability of machines and reduces downtime.

Understanding the role of dehumidifiers in Cold Rooms.

A dehumidifier is a device that can extract water or humidity from the air and make space dry. In other words, it can lower the humidity in the room. Compressor-based dehumidification systems work on the condensation principle. First, it draws humid air and cools it to the due point when moisture is converted into water. Then dry air is released in the space, and condensate water is stored in the tank or drained out through the hose pipe.

The reality is that cold rooms, despite their primary cooling function, can become hubs for excessive humidity for reasons ranging from warm air intrusion to the natural moisture release of stored products. A cold storage dehumidifier plays a pivotal role in such situations.

A dehumidifier is a frontline defense against escalating humidity levels in a cold room. By continuously extracting moisture from the air:

In a cold room environment, the role of a dehumidifier cannot be overstated, as it plays a critical part in maintaining the room’s overall functionality and safety. It actively prevents the formation of ice and frost.

Ice formed can make the floor slippery and increase the probability of accidents. Also, it overloads HVAC devices. Furthermore, a cold room dehumidifier creates a dry climate that prevents the formation of mildew and mold. When a cold room dehumidification system provides drier conditions, it decelerates decay. Hence, it helps to retain the freshness of perishable items.

Dehumidifiers help make the air in cold rooms healthier. It is also observed that controlled humidity workplaces help improve employees’ efficiency. Even though some people might think dehumidifiers are just extra equipment, they play a big role in cold rooms. By controlling moisture and saving lots of financial losses. This keeps the room and everything in it in good shape for longer.

Which is the best dehumidifier for Cold Storage Rooms? Desiccant or Condensation?

When it comes to cold storage rooms, the primary concern is temperature and moisture control. Two prominent types of cold room dehumidification systems are frequently considered for such environments: desiccant and condensation (or refrigerant) dehumidifiers. But which one is better suited for cold storage rooms?

Desiccant Dehumidifiers:

These devices use a desiccant material, like silica gel, to absorb moisture from the air. The desiccant material attracts and captures the moisture as the humid air passes through the unit.

Advantages of Desiccant Dehumidifiers in Cold Storage:

Effective in Low Temperatures: Desiccant rotor dehumidifiers work efficiently even at lower temperatures. They don’t rely on cooling the air to remove moisture, making them especially suitable for cold storage rooms.

• Less Frost Formation: Since they don’t cool the air to condense moisture, there’s minimal risk of frost or ice formation inside the unit.
• Consistent Performance: Their performance remains relatively constant across various temperatures and humidity levels.

Condensation (Refrigerant) Dehumidifiers:

These dehumidifiers work by cooling the air below its dew point. Once the air is cooled, moisture condenses into water, collected in a tray, or drained away.

Challenges of Condensation Dehumidifiers in Cold Storage:

• Reduced Efficiency at Low Temperatures: They tend to be less effective as temperatures drop, making them less suitable for icy environments.
• Potential for Frost Formation: The cooling mechanism can lead to frost buildup inside the unit, especially if the room is cold.

For cold storage rooms, desiccant silica gel dehumidifiers often emerge as the preferred choice. Their ability to function efficiently in low temperatures and the reduced risk of frost formation suits them for such environments. While condensation dehumidifiers have their advantages in other settings, desiccant models tend to have the edge regarding cold storage.

Additional tips for humidity control in cold rooms

Using a cold room dehumidifier to control humidity can tend to high CAPEX and running costs. So, in addition to the cold storage dehumidification system, we need to incorporate additional strategies to reduce operating costs. Here are some practical tips to ensure optimal humidity levels and safeguard the longevity and quality of stored items:

Regular Maintenance: Cold room systems need regular checks and maintenance like any other machinery. Preventive maintenance at equal intervals helps to keep components clean & efficient.

Seal Gaps and Leaks: Any small openings or cracks can let warm, moist air seep into the cold room. Ensure doors are sealed tightly and inspect walls, roofs, and floors regularly for potential gaps. Using weather stripping or insulating foams can be effective in sealing these gaps.

Optimize Air Circulation: Ensure that the cold storage room has adequate ventilation. Proper air circulation helps evenly distribute cold air and prevent moisture buildup in specific areas.

Monitor Humidity Levels: Invest in a good quality hygrometer to closely monitor the humidity levels in cold rooms. Awareness of the moisture levels can help take timely corrective actions.

Limit Door Openings: Warm air from outside can enter every time the door opens, raising the room’s humidity. Educate staff to minimize door openings and close doors swiftly after use. Installing plastic strip curtains can also be a barrier against warm air ingress.

Use Moisture Absorbent Materials: While desiccant or cold temperature dehumidifiers use this principle on a larger scale, placing more miniature desiccant packs (like those containing silica gel) in strategic locations can offer supplementary moisture absorption.

Opt for Insulated Walls and Floors: Using insulated materials for walls and floors can reduce condensation. 

Regularly Defrost Freezers: If the cold room has integrated freezing sections, ensure regular defrosting. It prevents ice buildup, which can affect humidity levels when it starts to melt.

Educate Your Staff: Awareness is key. Ensure that everyone working in and around the cold room understands the importance of humidity control and its role in maintaining it.

Review and Update: The needs of a cold room can change over time based on its usage, stored items, and external conditions. Regularly review and update your humidity control strategies to adapt to changing needs.

Summary.

High humidity in cold rooms and cold storage can harm the stored items and the infrastructure. While desiccant and condensation dehumidifiers offer solutions, desiccant dehumidifiers often have the edge for specific cold conditions. Nonetheless, it is essential to understand the requirements of each cold storage room and select a dehumidification solution accordingly. Effectively controlling humidity marks progress in extending the shelf life of stored goods while guaranteeing the durability and performance of your cold storage setups.

For further information on cold storage dehumidifiers, please get in touch with us.