Types Of Freezers Used In Food Industry Pdf

Industrial freezers remove heat from the surface of a food as rapidly as possible.

Types of freezers used in food industry pdf.

The development of small portable freezers has made it possible to transport items in danger of spoiling without the mess and inconvenience of a cooler filled with ice. Freezing is a method of food preservation which has been used by humans for thousands of years. To help decide which type of freezer to buy consider these features. Food preservation food preservation industrial freezers.

You can choose the type that suits your requirements. Cryogenic freezers use liquid nitrogen or liquid carbon dioxide as the refrigeration medium and the freezers may be batch cabinets straight belt freezers spiral conveyors or liquid immersion freezers. Air blast tunnel or plate freezers are common within the food industry and offer several advantages to food producers including flexibility ease of operation and economy of operation for large pro duction volumes. Modern air blast freezers use space efficient and energy efficient vertical air flow via prod uct lines.

Fricke in encyclopedia of food sciences and nutrition second edition 2003. While cryogenic freezers represent a low initial investment they have a. How to defrost a freezer 1. As a rule of thumb you ll need 1 5 cubic feet of space per person.

Typically the refrigerant when used in a freezer is converted from liquid to gas and then back again. This is what causes the food in a freezer to freeze. Organize the food in the freezer into food groups so you can find them easily. Turn the freezer off.

Chest freezers are also called reach in freezers. These phase cycles allow it to cool the inside of the freezer keeping the space at the desired temperature. Different types of food freezing technology. Place heavier items to the bottom of freezer.

The rate at which heat is removed from a food during freezing depends on how fast heat can travel within the food and how efficiently it can be liberated from the surface of the food into the surrounding atmosphere. Portable freezers may use ac or dc power or both and some even come with cords that allow them to be powered through a car s cigarette lighter outlet. Freezers are useful and long lasting home appliances. There are five types of freezers available.

In the past freezing food was as simple as surrounding it with a block of freshly carved ice to keep its core temperature lowered. They are the most common types of freezers that are used commercially.