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Jumat, 23 Agustus 2013

Unique Content Article: Working With Air Conditioning PA Technicians

Working With Air Conditioning PA Technicians


by Celina Heath


In the recent past, most key player in the refrigeration industry have been put under increasing pressure by regulations governing commercial coolants. Licensing restriction have become more stringent, and all air conditioning PA contractors must maintain a certificate of compliance. Efforts to import Ozone Depleting Substances are likely to be opposed and there is a timetable outlining the process of clearing HCFCs from the market.

The ambient climatic condition will affect the efficiency of most natural processes. As a result of the wide variations in temperatures, pressure and humidity, it is paramount that artificial systems be installed to maintain them within a desired range. A well tuned system will do its work all year round to cushion the controlled environments from atmospheric variations in the atmosphere.

The refrigeration principle is one of the most important aspects of a modern air conditioning system. The idea is to maintain the temperature of the target environment lower than that of the surrounding atmosphere. Because of the restricted volume in this space, there is a relatively higher rate of localized moderation of the target environment.

A classical example of this principle is in the preservation of groceries in the household refrigerator. Biologically, food spoilage is brought about by the proliferation of bacteria or fungi colonies that release digestive enzymes which break down organic matter to give off offensive odors. The essence of storing perishables in the deep freezer is to retard the metabolism in bacteria associated with food spoilage. Due to the proportions of scale between the fridge and the room in which it is placed, heat exchange effects are magnified in the refrigerator.

The goal of a HVAC system is to perform an exchange of ambient temperature between the target enclosure and a larger air mass. Developers have tested and released many varieties of the refrigeration system. A draft of air is drawn from within and blown over the coiled conduits that convey the coolant and then driven back to the room. Water is the most readily available coolant but is not sufficient for systems that have strict temperature constraints.

The property of gases loosing heat when it is suddenly expanded is used in vapor compression cycles. By this means, heat can be moved against the natural gradient from a cold enclosure to a warm room. The liquid draws heat of vaporization from the controlled process and is then compressed before being pumped to a condensation unit to liquefy it. This cycle is then repeated for as long as the system is in operation.

Some of the most popular commercial coolants are the R11, R12, R21 and R22 classes suited to the above systems. It must be appreciated that each product comes with its own specifications for operating pressures and auxiliary equipment to be employed. Among the factors that will influence the choice made by a client include cost of equipment and the availability of skilled labor for maintenance.

To assess the efficiency of an installation, air conditioning PA have defined various test parameters. The chiller tonnage is a direct measure of the cooling effect that is also used to estimate the specific power consumption for the system. The overall efficiency is indicated by a parameter known as the coefficient of performance.




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New Unique Article!

Title: Working With Air Conditioning PA Technicians
Author: Celina Heath
Email: nathanwebster335@live.com
Keywords: home improvement, construction, contractors, improvement,
Word Count: 546
Category: Home Improvement
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