1.30 Classification of heat exchanger , application and salection

Classification of heat exchanger :- A heat exchanger used in all kind of industry like chemical industry, pharmaceutical industry, oil and gas , refinery and petrochemical industry. a type of heat exchanger play different different role on industry.

Heat exchangers are an essential part of many industrial and mechanical processes. They allow for the transfer of heat from one fluid to another, making it possible to maintain or control temperatures in a wide range of applications. There are many different types of heat exchangers available, each with its own unique design and application.

what is heat exchanger

A heat exchanger is nothing but mechanical equipment which used in chemical industry for exchange of heat from one fluid to another fluid.

Classification of Heat Exchangers

Heat exchangers can be classified based on their construction, flow arrangement, and heat transfer mechanism. Based on construction, there are two main types: shell-and-tube heat exchangers and plate heat exchangers.

A heat exchanger can classifie as,

1. Shell and tube heat exchanger
2. Plate type of heat exchanger
3. air cooled heat exchanger
4. Double pipe heat transfer equipment

Shell and tube heat exchanger

Shell-and-tube heat exchangers consist of a shell (or casing) with a bundle of tubes inside. One fluid flows through the tubes while the other flows around them in the shell.

There are different types of shell and tube heat exchanger available in market like,

1. one pass shell and tube heat exchanger
2. two pass shell and tube Heat Exchanger
3. multi pass Shell and tube heat exchanger
4. floating type of shell and tube heat transfer equipment
5. fix tube type of tube and shell

plate heat exchanger

Plate heat exchangers, on the other hand, consist of a series of plates with fluid channels between them ( Classification of heat exchanger). The fluids flow through these channels, with heat transfer occurring across the plates.

Air cooled heat exchanger

Flow arrangement refers to how the fluids flow through the heat exchanger.

There are three main types:

1. parallel flow,
2. counterflow
3. crossflow.

In parallel flow, both fluids enter the heat exchanger at the same end and flow in the same direction.

In counterflow, the fluids enter at opposite ends and flow in opposite directions ( Classification of heat exchanger ).

Crossflow occurs when the fluids flow perpendicular to each other.

Heat transfer mechanism refers to how heat is transferred between the fluids. There are three main mechanisms: conduction, convection, and radiation. In heat exchangers, convection is the primary mechanism, with heat being transferred from one fluid to another through the use of a heat transfer surface.

Application of Different Types of Heat Exchangers

Different types of heat exchangers are used in different applications depending on factors such as fluid properties, temperature range, and space constraints. For example, shell-and-tube heat exchangers are commonly used in large-scale industrial applications such as oil refineries and chemical plants, where they can handle high temperatures and pressures. Plate heat exchangers, on the other hand, are often used in HVAC systems and small-scale industrial processes due to their compact size and efficient heat transfer.Classification of heat exchanger.

When to Use Types of Heat Exchangers

When selecting a heat exchanger, it is important to consider factors such as fluid properties, flow rates, pressure drops, and temperature ranges. For example, if the fluids have very different properties or if there is a large temperature difference between them, a shell-and-tube heat exchanger may be more appropriate. Plate heat exchangers may be better suited for applications with low to medium temperatures and where space is limited.

Selection of Types of Heat Exchangers

When selecting a heat exchanger, it is important to consider factors such as performance, efficiency, and cos It is also important to ensure that the heat exchanger is compatible with the fluids being used and that it meets any relevant safety and environmental regulations. Consulting with a heat exchanger manufacturer or engineer can help ensure that the right type of heat exchanger is selected for a specific application.

Some Important Questions and Answers on Heat Exchangers

Q: What is a heat exchanger?

A: A heat exchanger is a device that allows for the transfer of heat from one fluid to another.

Q: What are the different types of heat exchangers?

A: The two main types of heat exchangers are shell-and-tube heat exchangers and plate heat exchangers. They can be classified based on construction, flow arrangement, and heat transfer mechanism.

Q: What are the applications of different types of heat exchangers or Classification of heat exchanger?

A: Different types of heat exchangers are used in a wide range of applications, from large-scale industrial processes to small-scale HVAC systems.

Conclusion

A heat exchanger (. Classification of heat exchanger ) is widely used in all kind of industry for different different applications like condensation, evaporation, boiling, cooling or heating. A heat exchanger is typically mechanical equipment which used to transfer between two fluids. Classification of heat exchanger as shell and tube heat exchanger, plate type heat exchanger,air cooled heat exchanger , double pipe types of heat transfer equipment. Salection of types of heat exchanger is very important role of a chemical or process design engineer.

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