diet Post

Refrigerating Foods and the Process of Preservation

The primary objective of using a refrigerator is to protect perishable food. If commodities such as vegetables and fruits are not stored at recommended temperatures, they become prey to discharge of water, decay caused by bacteria or chemical reactions. This leads to the loss of nutritional value of the produce in question. These conditions also persist in items such as meat, pre-cooked meals, fish, dairy products, baked goods, and beverages. Here is a list of queries on the internal structure and working of a refrigerator. 1. How does refrigeration help? Fermentation and ripening are results of internal chemical reactions and bacterial growth. This causes the food to rot and become moldy. Storing food at a low temperature can slow down these reactions and bacterial growth to a large extent. 2. What are the basic components of a refrigerator? Compressor Heat exchanging pipes (outside the unit) Expansion valve Heat exchanging pipes (inside the unit) Refrigerant (a liquid that creates the cold temperatures inside the refrigerator by evaporation) 3. What are the components of refrigeration? There are five steps to the cycle: Generator – Generates ammonia gas Separator – Ammonia gas is separated from the water Condenser – Hot ammonia gas is converted to liquid ammonia by way of cooling Evaporator – Liquid ammonia evaporates to become a gas that forms the cool temperature in a refrigerator Absorber – Ammonia gas is absorbed into the water 4.