What is the difference between heat exchanger and chiller?

What is the difference between heat exchanger and chiller?

The main difference between a heat exchanger and a chiller is in the design. While a chiller system has a refrigeration unit that cools its circulating chiller fluid, a heat exchanger lacks a refrigeration unit and achieves temperature regulation through direct fluid heat transfer.

What is the purpose of a heat exchanger for a chiller system?

As chillers are required to reject heat to complete the vapor-compression cycle, a condenser heat exchanger is used which allows heat to migrate from the refrigerant gas to either water or air. Heat transfer has the greatest single effect on chiller performance.

Does a chiller have a heat exchanger?

Chillers incorporate two types of heat exchangers – evaporator and condenser. In an evaporator, refrigerant enters as a low pressure liquid/vapor mixture and exits as a low pressure gas. The change of state from liquid to gas occurs at a constant temperature and absorbs energy.

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What is a chilled water heat exchanger?

Chilled water is often used as a cooling medium instead of regular cooling water in difficult condensation services. This means a compact heat exchanger can perform required cooling with cooling water of a much higher temperature than a shell-and-tube condenser.

What is the difference between heat exchanger and evaporator?

Evaporator is the machine inside the air conditioner. Heat exchanger is the machine outside the air conditioner. If heating, exchange the internal and external machines.

Is evaporator a heat exchanger?

An evaporator, like condenser is also a heat exchanger. In an evaporator, the refrigerant boils or evaporates and in doing so absorbs heat from the substance being refrigerated.

What is a chiller system?

What Is a Chiller? An industrial chiller is a refrigeration system used to lower the temperature of machinery, industrial spaces, and process fluids by removing heat from the system and transferring it somewhere else.

How does a chiller HVAC system work?

The HVAC chiller works by changing the physical form of the refrigerant to move the heat from one place to the other. During the process, the chiller turns from liquid to gas and once it releases heat it returns to a liquid stage.

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What is the difference between cooler and chiller?

As nouns the difference between chiller and cooler is that chiller is something that chills, especially a machine that produces cold air, either for air conditioning, to prepare chilled foods etc while cooler is (countable) anything which cools.

What is the purpose of using a heat exchanger between condenser and evaporator?

Clarification: Heat exchanger between the condenser and the evaporator is used to sub-cool the refrigerant. Heat exchanger acts as a liquid sub-cooler. Refrigerant discharging from the condenser is sub-cooled by the low-temperature ammonia vapour in the evaporator.

What is the difference between a water chiller and glycol chiller?

Conversely, water has a better ability to retain and conduct heat from an associated process than a glycol mixture can. As a result, the efficiency of heat transfer for a water chiller will be higher than that of a glycol chiller. Overall, operators need to consider the ambient temperatures for the siting environment before choosing a chiller type.

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Are exchangers used for heating or cooling?

Exchangers may be used for either heating or cooling, however, in the industrial sector, particularly within plants and refineries, they are overwhelmingly used for cooling. Let’s dive a little deeper into what they are, why they are needed, how they work, and how they are classified.

How does an antifreeze chiller work?

For many chiller types, ethylene glycol is mixed with water at a ratio of 60/40. This higher percentage of glycol boosts the mixture’s antifreeze properties significantly. This is useful in cases where rapid cooling is required. In these situations, a process can be cooled to very low temperatures without freezing the coolant within its piping.

Can water be used as Chiller fluid?

The use of water as chiller fluid is an economical one as in most cases the water can be easily sourced with minimal costs. Alternatively, purified (deionized water, reverse osmosis) water can be used in a water-based chiller to achieve a higher cooling efficiency.