COOLING APPLICATIONS IN LIFE
Refrigeration helps to raise the living standards of people of all countries. Advances in refrigeration related in recent years are the result of joint work in which technical, related presonal, engineers, scientists and otroas people have contributed their skills and knowledge. The foundations on which new substances and materials are provided by science are built. This knowledge is applied to the field of Refrigeration by those who design, manufacture, install and maintain refrigeration equipment. After it has become useful through subsequent planned research, development and practical application.
The principle of cooling has no limits. The more jobs that are common and easily recognized is in food preservation. Almost all the products found in the home, on the farm, trade, industry, laboratories or are affected somewhat by cooling. Therefore cooling is a fact an essential convenience in modern life.
This first unit describes the history of cooling in the course of the ages and around the world. The first experiments with ice making machines and refrigeration indentifican. Also several applications of modern cooling systems are included to show the scope and the huge importance of this basic principle,
TO). BRIEF HISTORICAL OUTLINE `` COLD OUT OF THE MEN``
The history of ice is as far back as historical records. Coming the caveman from the Stone Age knew what ice was, I had no idea about the use of it for precervar food. After thousands of years, the Chinese learned that ice improved the taste of babidas. Then, they cut ice in the winter, packed with straw and brushwood and sold during the summer. The ancient Egyptians found that could cool the water in porous pitchers depocitàndola placed on the roofs of the houses to sunset. The night breezes evaporating moisture right through the walls of the pitcher infiltrating, cooling the water in this.
The Greeks and Romans carrying snow from mountain tops to conical straw trenches and then covered them with branches covered with a thatched roof.
With the progress of civilization the people how he learned to cool drinks and food for disfritarlos better. This increased knowledge the use of ice and snow.