Question: What Is The Difference Between Co Current Heat Exchanger And Counter Current Heat Exchanger?

Where does parallel flow heat exchanger used?

However, there are applications where parallel flow has its benefits, such as when limiting the transfer of heat is recommended.

In gas processing parallel heat exchangers are used when it’s important to limit heat transfer or control the temperature to prevent freezing or crystalization or hydrate formation..

How the flow rate affects the heat exchanger performance?

On the other hand, an increase in the heat transfer coefficient is observed if the area is maintained constant. Doubling the mass flow rate will result in a 92% increase in the heat transfer coefficient. However, there is a concomitant increase in the pressure drop, proportional to the mass flow rate raised to 0.95.

Why is a countercurrent heat exchanger more efficient?

Counter flow heat exchangers are inherently more efficient than parallel flow heat exchangers because they create a more uniform temperature difference between the fluids, over the entire length of the fluid path. … For example, one fluid may make 2 passes, the other 4 passes.

What affects heat exchanger efficiency?

Heat exchanger efficiency is highly affected by the velocity of the operating fluid so it is recommended that the flow rate should be increased from time to time. The increased turbulence works to retard fouling tendencies that otherwise impact heat exchanger performance and impede the flow of fluids.

Which type of heat exchanger has more heat transfer for the same area?

Each of the three types of heat exchangers (Parallel, Cross and Counter Flow) has advantages and disadvantages. But of the three, the counter flow heat exchanger design is the most efficient when comparing heat transfer rate per unit surface area.

How does a cross flow heat exchanger differ from a counter flow one? How does a cross-flow heat exchanger differ from a counter-flow one? … In a counter flow heat exchanger, the hot and cold fluids enter the heat exchanger at opposite ends and flow in opposite direction. But in case of cross flow heat exchanger, the two fluids usually move perpendicular to each other.

How can you make a heat exchanger more efficient?

In general, the most efficient way to install a heat exchanger is to flow the fluid in a countercurrent arrangement (so that if the coolant travels from left to right and the hot fluid travels from right to left), and for shell and tube heat exchangers, The agent should enter the lowest inlet position (as shown above) …

What is a counter flow heat exchanger?

A counter-flow heat exchanger is one in which the direction of the flow of one of the working fluids is opposite to the direction to the flow of the other fluid. In a parallel flow exchanger, both fluids in the heat exchanger flow in the same direction.

Which heat exchanger is best?

Plate exchanger is the most efficient due to turbulent flow on both sides. High heat-transfer coefficient and high turbulence due to even flow distribution are important. However, a plate heat exchanger regenerator is restricted to low viscosities. With high viscosities, a special tubular may be required.

What is the difference between heater and heat exchanger?

While in heat exchangers a service fluid heats a process fluid without both having direct contact with each other, in electric heaters only the fluid to be heated is in the process. Here, heating is made by means of tubular heating elements immersed directly in the process fluid.

How do you calculate effective heat exchanger?

The effectiveness (ϵ) of a heat exchanger is defined as the ratio of the actual heat transfer to the maximum possible heat transfer. Qmax is the minimum of these two values i. e.