Basic Refrigeration and Air Conditioning by P.N. Ananthanarayanan
Refrigeration, Heating and Air Conditioner Company proudly serving New Jersey
Air conditioning can be used in both domestic and commercial environments. This process is most commonly used to achieve a more comfortable interior environment, typically for humans and other animals; however, air conditioning is also used to cool and dehumidify rooms filled with heat-producing electronic devices, such as computer servers , power amplifiers , and to display and store some delicate products, such as artwork. Air conditioners often use a fan to distribute the conditioned air to an occupied space such as a building or a car to improve thermal comfort and indoor air quality. Electric refrigerant-based AC units range from small units that can cool a small 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. The cooling is typically achieved through a refrigeration cycle , but sometimes evaporation or free cooling is used. Air conditioning systems can also be made based on desiccants chemicals which remove moisture from the air. Some AC systems reject or store heat in subterranean pipes.
Air conditioners use refrigeration to chill indoor air, taking advantage of a remarkable physical law: When a liquid converts to a gas in a process called phase conversion , it absorbs heat. Air conditioners exploit this feature of phase conversion by forcing special chemical compounds to evaporate and condense over and over again in a closed system of coils. The compounds involved are refrigerants that have properties enabling them to change at relatively low temperatures. Air conditioners also contain fans that move warm interior air over these cold, refrigerant-filled coils. In fact, central air conditioners have a whole system of ducts designed to funnel air to and from these serpentine, air-chilling coils. When hot air flows over the cold, low-pressure evaporator coils , the refrigerant inside absorbs heat as it changes from a liquid to a gaseous state.
For an air conditioning system to operate with economy, the refrigerant must be used repeatedly. For this reason, all air conditioners use the same cycle of.
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In other words, refrigeration means artificial human-made cooling  . Heat is removed from a low-temperature reservoir and transferred to a high-temperature reservoir. The work of heat transfer is traditionally driven by mechanical means, but can also be driven by heat, magnetism , electricity , laser , or other means. Refrigeration has many applications, including, but not limited to: household refrigerators , industrial freezers , cryogenics , and air conditioning. Heat pumps may use the heat output of the refrigeration process, and also may be designed to be reversible, but are otherwise similar to air conditioning units.
Audience: This program is excellent for the training of maintenance mechanics and electricians as well as multi-craft training needs. Request A Demo. Prerequisites : This program is designed for persons who are familiar with the principles of refrigeration theory, the basic operation of air conditioning and refrigeration systems, the proper use of hand tools and good safety practices. This program focuses on the principles involved in the refrigeration process, including methods of heat transfer, how substances change phase, and the relationship between pressure and temperature. It also shows the basic components of a refrigeration system and explains their functions. Description : This comprehensive DVD training program covers vapor compression equipment designs and refrigerants.
If we are interested in learning how a refrigeration system works, it is helpful to understand from the Ph Pressure Enthalpy chart perspective. It makes our life easier. Yeah, it seems complicated at first, but it will be easier to understand once I explain the refrigeration cycle diagram section by section. It is important to understand the basic refrigeration cycle, it help us to comprehend what is going on within the air conditioner units. The refrigeration cycle tells us if there is air in the air conditioner units, what to repair after troubleshooting the refrigeration system, if there is enough air conditioner Freon, or if the filter is dirty. We could know the entire thing by knowing the pressure and temperature of the evaporator, condenser, and compressor. Once we have found the pressure and temperature, we plot in the Ph charts to determine what and where sub-cooled and superheat take place in the Ph charts.