Air Conditioning: A Case Study Report

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1. Introduction
For this study report, it will discuss about the air-conditioning system nowadays. It will explain how a central air-conditioning system works, and also compare two types of air-conditioning system: air-cooled conditioning system and water-cooled conditioning system.

2. Air-conditioning Basics
Air conditioners use refrigeration to chill indoor air. When a liquid converts to a gas, it absorbs heat. Air conditioners exploit this feature by refrigerants to evaporate and condense over and over again in a cycle. The refrigerants that have properties enabling them to change state at relatively low temperatures. Air conditioners also contain fans that can make air flow.

When hot air flows over the cold, low-pressure evaporator, the
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Why air-cooled conditioning still be used
Air-cooled chillers are particularly well suited for facilities that have the following characteristics.

Smaller cooling loads
Due to the available product capacities, air-cooled chillers are typically used in applications that require 300 tons of cooling or less. However, many industry experts agree that with cooling loads as low as 200 to 250 tons, water-cooled chiller options should also be considered because they may provide a more cost-effective solution if other factors do not rule them out. For mid-size Buildings, which cooling load is about 200-400 tons, air cooled systems may offer first cost incentive to sacrifice energy efficiencies of water-cooled systems.

Spaces used to install equipment
Due to the size of the building, there are different space requirement of air-cooled air-conditioning system and water-cooled air-conditioning system. For the water-cooled air-conditioning system, it requires a mechanical room and cooling tower, which need a lot of space. If the building has enough spaces to install them, air-cooled air-conditioning system will be an alternative.

Significant hours with high temperatures and
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This may make it difficult to justify the expense of water and water treatment required for a water-cooled chiller.

Lack of trained maintenance staff
Water-cooled chillers require constant and careful maintenance of their cooling towers. Without an on-site staff or hired contractors trained to accomplish this task, the performance of the cooling system can be significantly compromised. It's much easier for facilities without trained staff or the funds to hire contractors to maintain the performance of an air-cooled chiller.

Smaller capital budgets
Air-cooled systems generally have a lower first cost than water-cooled systems. This will be potential application for air-cooled chillers include offices, schools, small malls, and medical centers.

10. Conclusion
In conclude, as the mentioned above, there are several advantages and disadvantages for both air-conditioning system. In practice, it depends on the situation and factors, like space, cost, surrounding environment, as consideration to choose the best system for particular

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