English 
فارسی 
You probably know that chillers are divided into two categories according to their condenser structure: air-cooled and water-cooled chiller categories. In this article, we will take a closer look at choosing cool air chillers and what to look for when buying a cool air chiller. Cool air chillers are made of compression units that work with copper pipes and aluminum fins by reducing the temperature of high temperature refrigerant gas using ambient air. However, cool air chillers have many features within them. Depending on the area used and the work situation to be done, the decision to choose a cool air chiller will also change. For this reason, when choosing a cool air chiller, you must consider many factors.
In terms of general characteristics, air-cooled chillers are less efficient than water-cooled chillers. However, in some cases, cool air chillers are preferred.
Now the question arises that when choosing and buying a cool air chiller, what points should be considered ?!
Criteria to consider when choosing a cool air chiller!
1- Minimum chiller capacity
When choosing a cool air chiller, the characteristics of the area used and the capacity of the device used are taken into account. Where the area used is very cold and the temperature difference between day and night is very large, cool air chillers are preferred. However, in such cases, it should be considered whether to use devices with a minimum capacity or not. If there are low capacity appliances, it makes sense to prefer air-cooled chillers.
2- The effect of height on the performance of the cool air chiller
The height factor is the next thing you should pay attention to when buying a cool air chiller. In cool air devices, the capacity decreases with increasing altitude. So you have to consider this factor thoroughly.
3- Chiller control type
If you are going to choose a cool air chiller, you should also consider how to control the chiller. Because devices that are easily controlled promise more efficient work and performance.
4- Resistance to air temperature
In cold air devices, the remaining capacity of the device is reduced by 1% per 1 ° C. This is an important point that will greatly affect your choice. At the same time, this change also affects the compressor and increases the power drawn by the compressor by 1%.
5- Selecting a cool air chiller based on the pressure applied to the device
It is necessary to protect the devices as much as possible against high pressure, whether the air is cool or the water is cold. For this purpose, the amount of condenser air flow must be high. At the same time, low and medium pressure refrigerants should be preferred.
6- Low evaporator pressure drop
Again, in the group of air-cooled chillers, the values of evaporator pressure drop should not exceed 60 kPa as much as possible, and in the group that prefers the lowest steam pressure drop as much as possible.
7- Physical size of the chiller
The size of the chiller plays an important role at this stage. If you have a small business, keep in mind that chillers are often smaller in size than cold water chillers. In such cases, cool air chillers are generally preferred because they take up little space.
8- The amount of noise caused by the activity of the device
The issue of cool air chiller noise should also be considered. In places where noise is important, groups whose sound pressure does not exceed 75dBA at a distance of 5 meters in open space should be selected, and groups with low noise levels should be preferred.
9- Special permits for cool air chillers to choose from in special places
Sheet metal parts and pieces Groups that are installed on the beach and exposed to the atmosphere of salinity and corrosion must have the relevant certificates to protect the external and internal components of the chiller. For example, if possible, a copper tube or copper fin should be selected.
10- Number of compressors
The number of compressors of the selected chiller group and the number of refrigerant circuits must be written in the specifications.
When you consider the points to consider when buying a cool air chiller, you get cool air chiller systems that you can use for years with the same functionality and get maximum performance.
