Chiller Systems: What You Should Know

Chillers are important in cooling machinery and products. Ideally, a chilled liquid or water circulates through system equipment, creating a favorable environment.

Chillers are an essential HVAC component with a wide application. These systems can provide a comfortable environment in restaurants, hospitals, and sporting arenas. Besides, industrial and manufacturing plants depend on chillers to cool products and machinery.

Refrigerant circulates through the chillers system to facilitate heat transfer from the interior to the exterior. Now, the transfer of heat entirely depends on the physical state of refrigerant.

How chillers work

Chillers utilize the principle of vapor absorption, providing a continuous flow of the coolant to the cold side of a process. The cooler side usually has water at 50°F (10°C).  The coolant flows from a facility, e.g., machinery, where it absorbs heat. Its destination is usually cold water.

Industrial water chiller in Bangladesh uses a vapor compression mechanical refrigeration system. This refrigeration system joins the process water system via an evaporator.

Typically, the refrigerant spreads via an evaporator, compressor, condenser, and expansion device. Each component experiences a thermodynamic process.

Simply put, an evaporator of a water-cooled chiller in Bangladesh serves as a heat exchanger. It captures heat and transfers it to the flowing coolant. During heat transfer, refrigerant evaporates, i.e., changes into a vapor. Meanwhile, the temperature of the process coolant reduces.

From the evaporator, the refrigerant flows to the compressor. The compressor ensures that:

  • Evaporator pressure remains low – to absorb heat correctly.
  • Increases pressure of the outgoing refrigerant vapor – to retain high temperature for efficient heat release when it reaches the condenser

When the refrigerant changes from vapor to liquid, it gives up latent heat carried away by a cooling medium.

Water chiller or air-cooled chiller, which one works for you?

The difference between the two systems is simply the medium of cooling. So, you choose between air-cooled and water-cooled chillers.

There are lots of both versions in Bangladesh. Let’s see how they differ:

  • Air-cooled: these versions resemble automobile radiators. Ideally, they have a motorized blower that forces air across the grid of refrigerant lines. The majority works at or below 95°F (35°C).
  • Water-cooled: Water cooled chiller in Bangladesh is a popular option. Water cools their condensers. These systems are efficient for medium and large installations. However, there must be a sufficient supply of water.

With lots of options in the market, you might consider checking the water chiller price in Bangladesh.


They come in different sizes and models. This way, you can set a reasonable budget.

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