What is a good method of removing moisture from air before it goes into the air receiver?

Cooling the air before it enters the air receiver is an effective method for removing moisture. This process is rooted in the principles of thermodynamics and the behavior of gases. When air is cooled, its capacity to hold moisture decreases, leading to condensation. As the temperature falls, the water vapor in the air transforms from a gaseous state to liquid water, allowing for effective moisture removal.

Using cooling systems, such as air dryers or chilled surfaces, helps to achieve this condensation and extract water. This method is widely applied in industrial settings where dry air is essential for system performance and to prevent corrosion or damage to equipment.

Heating the air would actually increase the moisture-holding capacity, potentially leading to more humidity upon cooling down again. Pressurizing the air may not directly remove moisture; although it densifies the air, it does not reduce moisture content effectively. Increasing the velocity of the air can influence particle movement but does not inherently remove moisture. Thus, cooling is the most logical and effective method among the given options to ensure that moisture is removed before air moves into the air receiver.