What is the function of a baffles?

Baffles serve two functions: Most importantly, they support the tubes in the proper position during assembly and operation and prevent vibration of the tubes caused by flow-induced eddies, and secondly, they guide the shell-side flow back and forth across the tube field, increasing the velocity and the heat transfer …

What affects pressure drop in heat exchanger?

“Higher velocities lead to higher pressure drops.” Pressure drop is related to the flow rate of the fluids within the shell and tube heat exchanger. Therefore, to increase the pressure drop to ensure the exchanger is as efficient as possible, the designer may take measures to allow for greater shell-side velocity.

What is the role of the baffles in a shell and tube heat exchanger How does the presence of baffles affect heat transfer and the pumping power requirements?

Baffles are panels that are placed in the shell and tube heat exchanger. The reason for placing baffles is to increase the heat transfer coefficient between the fluids. Baffles provide higher turbulence in the flow of fluid and thus the heat transfer coefficient increases.

What is the purpose of the baffles in a shell and tube heat exchanger?

Baffles play a crucial role in regulating shellside fluid flow and improving heat transfer between shellside and tubeside process fluids.

What is the function of baffles in hydraulic system?

Baffles work to efficiently separate the return flow from the inlet flow. Additionally, baffles help the reservoir fluid circulate which promotes heat dissipation from the fluid.

What causes pressure drop?

Pressure drop is defined as the difference in total pressure between two points of a fluid carrying network. A pressure drop occurs when frictional forces, caused by the resistance to flow, act on a fluid as it flows through the tube. Low velocity will result in lower or no pressure drop.

What is pressure drop in heat sink?

Heat sink pressure drop curves and fan curve with flow operating points. At a given volumetric air flow rate those heat sinks with more fins and shorter fins experience a higher air velocity in the heat sink channels and exhibit a higher pressure drop.

What do baffles do in a boiler?

“Baffles”, turbulators, retarders or whatever name people choose to call them by are basically a set of steel plates that keep the heat inside the boiler for as long as possible and ensure the maximum amount of contact possible between the water jacket and the heat produced by combustion.

What is the function of baffles Mcq?

A baffle is designed to support tube bundles and direct the flow of fluids for maximum efficiency.

What are the functions of a hydraulic tank?

Beyond its most rudimentary role of providing fluid storage, the main functions of the hydraulic tank are to dissipate heat and allow contaminants to settle out of the fluid.

Do you need baffles on a valve cover?

Registered. You will definitely want baffles in front of all exits. These can be part of the device you attach, or they can be part of the valve cover.

How to reduce the shell side pressure drop of a baffle?

Reducing the baffle cut to below 20\% to increase the shell side heat transfer coefficient or increasing the baffle cut beyond 35\% to decrease the shell side pressure drop usually leads to poor designs.

How does a heat transfer baffle work?

Has alternating outer rings and inner disks which directs the flow radially across the tube field. They all very effective in pressure drop to heat transfer conversion. In this type of baffles the shell side fluid follows through the clearance between the tube outside diameter and the baffle hole diameter.

Can baffles be used in a shell and tube exchanger?

It is very common to use baffles in the shell side of shell and tube exchanger. They cause the shell side fluid to go across the tubes. This causes ‘cross flow’ conditions and promotes the overall heat transfer. But at the same time, the shell side fluid has to overcome the additional obstacles in the form of the tube bundle.

Why do we use baffles in the support intervals of tubes?

The support intervals can be shorter where flow-induced vibrations occur in certain operations. Supporting the tubes using baffles also prevents mechanical vibrations that can result in tubes touching each other and giving rise to leakages and failures mainly near tube sheets