Why is counter flow heat exchanger better in terms of heat transfer?

Why is counter flow heat exchanger better in terms of heat transfer?

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.

How do you calculate the heat transfer of a heat exchanger?

4.0 – HEAT EXCHANGERS CALCULATIONS:

1. The main basic Heat Exchanger equation is: Q = U x A x ΔTm =
2. The log mean temperature difference ΔTm is: ΔTm =
3. (T1 – t2) – (T2 – t1) = °F.
4. T1 = Inlet tube side fluid temperature; t2 = Outlet shell side fluid temperature;
5. ln (T1 – t2) (T2 – t1)

Which heat exchanger flow type is the most efficient Mcq?

Counter flow heat exchangers

Does steam flow from top to bottom or from bottom to top inside a heat exchanger?

In steam heated converters, the water to be heated circulates through the tubes and steam circulates in the shell surrounding the outside of the tubes. This results in condensate draining to the bottom of the heat exchanger shell as the steam gives up its latent heat (Figure 1).

What are the benefits of the baffles in a shell and tube heat exchanger?

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 …

Why is the counterflow arrangement considered as the most efficient heat exchanger configuration?

The diagram above shows a Shell and Tube Heat Exchanger. In the counter flow setup, the fluids are travelling along the heat exchanger in opposite directions. This distributes the heat more evenly across the heat exchanger and allows for maximum efficiency.

What is the function of baffle plate?

The main roles of a baffle in a shell and tube heat exchanger are to: Hold tubes in position (preventing sagging), both in production and operation. Prevent the effects of steam starvation, which is increased with both fluid velocity and the length of the exchanger. Direct shell-side fluid flow along tube field.

Is a baffle plate necessary?

Without the baffle plate in the way, stoves wouldn’t be able to produce as much heat because all of the warm air would be rapidly lost up the flue. Baffles can also typically be removed from wood burning and multi fuel stoves because they can be damaged over time, causing them to warp and sag.

Where does the baffle plate go?

The simplest way to describe a baffle plate, which is placed at the top of the fire chamber, is a deflector shield which reflects heat back into the combustion chamber. This ensures that as much heat as possible is retained in the stove and emitted into the room in a controlled manner.

How does a baffle work?

How do Baffles Work? Baffles work by disrupting the flow pattern and providing top to bottom flow. By ensuring that top to bottom flow is achieved in addition to swirling flow, baffles are able to prevent this from happening.

Does removing baffles hurt engine?

It is possible to damage your engine by removing baffles from your exhaust. It is possible to damage your engine by removing baffles from your exhaust. Removing baffles from the exhaust provides for a freer flowing exhaust, causing your exhaust to become louder and flow more air or flow air faster.