What is frozen cold storage? Advantages and disadvantages of frozen cold storage

The widely used industrial refrigeration systems include industrial ice machines and freezers. In terms of operating principles, these two refrigeration systems work relatively similarly. However, there are still differences between them.

With cold storage, they are cooled by forced air convection thanks to the wind freezer system, while today's ice makers often use both water and air. In the article below, Tan Long will learn more about the system What is cold storage? ok

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What is a cold storage system?

What is a cold storage? A cold storage is a storage system that uses very low temperatures to preserve foods, pharmaceuticals and agricultural products for long periods of time. The freezing process helps prevent the growth of microorganisms and slows down the decomposition process, ensuring product quality and safety. Cold storage usually maintains temperatures from -18°C to -30°C, meeting the needs of preserving perishable items, maintaining the freshness and nutritional value of the products.

Classification of current cold storage

Cold storage Freezing is a storage system designed to preserve products at very low temperatures, helping to prevent spoilage and maintain food quality for a long time. Freezing cold storage plays an important role in the food industry, especially for products such as meat, seafood, vegetables and other frozen foods.

Quick freezing cold storage

Quick freezing cold storage is a type of cold storage that can cool products to very low temperatures in a short time, usually from -30°C to -40°C. This temperature helps the water crystals in the product freeze very quickly, minimizing damage to the cell structure of the food. Quick freezing cold storage is often used in food processing plants to freeze products before long-term storage.

Deep freezer cold storage

Deep freezers usually maintain temperatures between -50°C and -60°C and are used for products that need to be stored for a long time without losing quality. High-end foods or products that require high quality are often stored in deep freezers. This helps prevent oxidation and protect products from bacterial invasion.

Conventional cold storage

Conventional freezers have temperatures ranging from -18°C to -25°C, suitable for short- to medium-term food storage. This type of storage is often used in supermarkets, convenience stores and restaurants. Conventional freezers help maintain food quality without deep freezing, suitable for products such as vegetables, fresh meat and seafood.

Mobile freezer cold storage

Mobile cold storage is a flexible type of warehouse, suitable for transporting or temporarily preserving food for a short time. Mobile cold storage usually has a temperature of -20°C to -30°C, suitable for distributing food from factories to retail points while maintaining product quality.

Advantages and disadvantages of using frozen cold storage

Using frozen cold storage has specific advantages and disadvantages as follows:

Advantages of frozen cold storage

• Preserving food quality for a long time: Freezing cold storage helps preserve the nutrients and structure of food for a long time. When frozen at very low temperatures, bacteria and mold cannot grow, preventing product spoilage.
• Minimize product loss: Cold storage minimizes the risk of damage during transportation and storage. This helps businesses save costs and optimize product preservation processes.
• Increase shelf life: With low temperatures, food stored in frozen cold storage can extend its shelf life to several months or even years, suitable for products that require long-term preservation such as meat, seafood and vegetables.
• Save storage space: Cold storage allows for the storage of a variety of foods in a single space, thanks to its ability to maintain a stable temperature. Businesses do not need to invest too much in individual storage facilities.

Disadvantages of cold storage

• High investment cost: To install a cold storage facility, businesses need to invest in refrigeration systems, insulation, and necessary electronic equipment. The initial cost is often high, and maintaining the cold storage is also costly.
• High energy consumption: Cold storage requires continuous operation to maintain low temperatures. This results in high energy consumption, affecting the operating costs of the business.
• Regular maintenance required: Cold storage systems require regular maintenance to ensure efficient operation and prevent breakdowns. Maintenance costs and time can be a burden on businesses.
• Environmental impact: Cold storage facilities use refrigerants that can have an impact on the environment if not handled properly. This poses safety and environmental compliance challenges.

Applications of cold storage

Cold storage is a system for preserving food and goods at extremely low temperatures, helping to extend storage time and maintain product quality. With the ability to cool quickly and maintain a stable temperature, cold storage has become an important tool in many different fields.

Food preservation

Freezers are most commonly used in the food industry. They help preserve meat, seafood, vegetables, and processed products at low temperatures to prevent bacterial growth, maintain flavor and nutritional value. Food processing plants, supermarkets, restaurants, and manufacturing facilities all use freezers to ensure food is always fresh and safe for consumers.

Storage and preservation of pharmaceuticals

In the medical and pharmaceutical industries, cold storage facilities help preserve temperature-sensitive pharmaceuticals, vaccines, and biological products. Many pharmaceuticals need to be stored at very low temperatures to avoid changes in quality and effectiveness. Cold storage facilities ensure stable temperatures, meeting the strict storage standards of the pharmaceutical industry.

Preservation of plant varieties and agricultural products

Cold storage is also used to preserve plant varieties, seeds, and special agricultural products. These products often require low temperatures to extend their shelf life and prevent quality loss due to oxidation. Thanks to cold storage, agricultural products can maintain their quality, supporting cultivation and providing a stable food supply.

Industry and manufacturing

Some industries also use cryogenic cold storage to store materials and chemicals that require low temperatures. For example, in high-tech manufacturing, some components and materials need to be stored at a stable temperature to ensure quality and shelf life. Cryogenic cold storage is the ideal solution for these special storage requirements.

Logistics and transportation industry

Cold storage is an important tool in the cold chain, especially when transporting goods that require low temperature storage. Logistics and shipping companies use cold storage to temporarily store goods before delivering them to distribution locations. This helps ensure that the goods maintain their quality throughout the transportation and delivery process.

Cold storage operating process

The cold storage operation process includes basic steps from preparation to maintenance, to ensure the system operates efficiently, safely and stably.

Preparation before operation

Before operating, it is necessary to thoroughly check the equipment in the cold storage freezer to ensure that they are operating properly. This step includes checking the refrigeration system, ensuring that components such as the compressor, fan, and temperature sensor are working properly. If any problems are detected, they must be fixed immediately before starting to use.

Set the right temperature

Setting the temperature for the cold storage is an important step. Depending on the type of food and storage requirements, the temperature is usually set from -18°C to -60°C. Make sure the temperature parameters are set correctly to meet the storage requirements of the product and avoid food quality loss.

Sort and store products

After setting the temperature, proceed to arrange and store the products in the warehouse. The products should be placed in a suitable location, avoiding blocking the ventilation and not placed against the warehouse wall to avoid obstructing the cold air flow. Each type of product should be fully labeled for easy control and retrieval when needed.

Temperature monitoring and control

During operation, temperature monitoring is essential. Cold storage systems often have sensors to continuously monitor temperature. Temperatures need to be checked and recorded periodically to ensure that products are always stored at optimal temperatures. If temperature differences are detected, timely adjustments need to be made.

Cold storage cleaning

Regular cleaning of cold storage is an important step to keep the warehouse clean and safe. The interior surfaces of the warehouse, storage shelves and equipment need to be cleaned to remove bacteria and accumulated odors. The cleaning process must comply with food safety regulations to ensure the warehouse is always in the best condition.

Regular equipment maintenance

Cold storage is a continuous operation system, so it needs regular maintenance. This includes checking and cleaning components such as compressors, fans, pipes and temperature sensors. Regular maintenance helps prolong the life of the equipment and minimizes the risk of failure during operation.

Things to note when using frozen cold storage

To use the frozen cold storage effectively and safely, there are some points to note as follows:

Check temperature regularly

Temperature is the most important factor in a cold storage facility. Temperatures should be checked regularly to ensure that the system maintains the correct temperature for the product. If the temperature is not low enough, food can spoil and lose quality.

Ensure ventilation

Freezers require good ventilation to maintain air circulation and prevent condensation. Effective ventilation helps maintain stable temperatures and prevents ice from forming on product surfaces.

Arrange food properly

When storing food in a cold storage freezer, it is recommended to arrange the products so that there is space between them to allow the cold air to circulate evenly. Avoid piling up food as this can hinder the freezing process and reduce the preservation efficiency.

Ensure regular cleaning

Cold storage needs to be cleaned regularly to remove bacteria and prevent odors from developing. Regular cleaning helps keep the cold storage clean and ensures food safety.

Check electrical system

Cold storage requires a stable power source to operate. Therefore, check the electrical system periodically and have backup measures in case of power outages. This helps the cold storage maintain safe temperatures and preserve food effectively.

Make sure the warehouse door is closed

To avoid heat loss and save energy, keep the cold storage door closed when not in use. Frequent opening or failure to close the door can reduce the internal temperature and affect the quality of food preservation.

How much does it cost to invest in a cold storage facility?

Below are the factors that affect the cost of investing in cold storage and some specific cost levels.

Warehouse size and capacity

The size and capacity of a cold storage facility is the biggest factor affecting the cost. Small cold storage facilities with a capacity of several tens to several hundred cubic meters will cost less than large-scale facilities of up to several thousand cubic meters. Therefore, the cost can range from several hundred million to billions of VND depending on the size.

Refrigeration and temperature systems

The refrigeration system in a cold storage facility requires advanced and modern technology to maintain low temperatures from -18°C to -60°C, depending on the type of storage (quick freezing, deep freezing, or conventional freezing). The more complex the system, the higher the cost. An advanced refrigeration system can cost from several tens to hundreds of millions of VND.

Material quality and insulation

Insulation materials and technology are important factors that affect the performance and durability of cold storage. Insulation materials such as PU (Polyurethane) insulation panels or high-grade insulation materials help maintain stable temperatures, reduce electricity costs, but also increase initial investment costs. The cost of these materials often ranges from several tens of millions to more than one hundred million VND.

Installation and maintenance costs

Installation and maintenance costs are also factors to consider when investing in a frozen cold storage. The installation process requires high technical skills and must ensure safety standards. In addition, cold storage needs to be periodically maintained to ensure the efficiency and longevity of the system. Installation and maintenance costs can range from a few million to tens of millions of VND.

Management and monitoring system

A cold storage facility needs a temperature monitoring and management system to detect and handle problems promptly. The cost of this system usually ranges from a few million to tens of millions of VND, depending on the technology and features provided by the system.

See also:

• What is cold storage? Classification and application of cold storage
• What is the structure of cold storage? Benefits of installing cold storage
• Instructions on how to make the most effective cold storage