Different types of refrigerants pdf

This article is about cooling of air. Air conditioning units outside a building. Air conditioning can be used in both domestic and commercial environments. Electric refrigerant-based AC units range from small units that can cool a different types of refrigerants pdf bedroom, which can be carried by a single adult, to massive units installed on the roof of office towers that can cool an entire building.

In common usage, though, “air conditioning” refers to systems which cool air. Since prehistoric times, snow and ice were used for cooling. This practice was replaced by mechanical ice-making machines. The basic concept behind air conditioning is said to have been applied in ancient Egypt, where reeds were hung in windows and were moistened with trickling water. The evaporation of water cooled the air blowing through the window. This process also made the air more humid, which can be beneficial in a dry desert climate.

He hoped to eventually use his ice-making machine to regulate the temperature of buildings. He even envisioned centralized air conditioning that could cool entire cities. Though his prototype leaked and performed irregularly, Gorrie was granted a patent in 1851 for his ice-making machine. Though his process improved the artificial production of ice, his hopes for its success vanished soon afterwards when his chief financial backer died and Gorrie did not get the money he needed to develop the machine.

According to his biographer, Vivian M. Gorrie died impoverished in 1855, and the dream of commonplace air conditioning went away for 50 years. This novel system used a compressor to force the refrigeration gas to pass through a condenser, where it cooled down and liquefied. The liquefied gas then circulated through the refrigeration coils and vaporized again, cooling down the surrounding system.