Thursday, December 6, 2007
Chances are, he's in your house right now. He's big. He's cold. And he knows where you keep your food. As a matter of fact, he is where you keep your food. He's your refrigerator. And he's in for a surprise.
Today, a century after the refrigeration cycle revolutionized the concept of food storage, the refrigerator is gearing up for a makeover. Modern science and engineering principles are combining in the latest refrigerators, and they're on their way to a kitchen near you in the not-too-distant future.
The refrigerator is an important instrument of food preservation for modern society. The refrigeration cycle is the chemical process that drives the refrigerator and generally consists of four main steps: 1) compression of ammonia refrigerant; 2) cooling of ammonia refrigerant; 3) expansion of ammonia refrigerant; and 4) drawing in of heat from the core of the refrigerator. Many variations on this process exist as manufacturers find new ways to improve the temperature-control aspects of the refrigerator.
My comments:
Refrigerators are really complicated .Its not what I thought as only a machine that stores food.Refrigerators are really very important to our daily lives .We must really thank the person who invented the refrigerator.
11:51 AM
