Quick Answer: Which Heat Exchanger Is More Effective?

Is boiler a heat exchanger?


You need heat exchanger to extract heat from boiler.

Simply put, heat exchanger is a device where you just need to transfer heat from one fluid medium to anothor, whereas, Boiler is a a steam generation machines which needs bunch of heat exchanger for its operation.

So, boiler is definitely not a heat exchanger!.

What is the difference between heater and heat exchanger?

Heat exchangers can be designed both for heating and for cooling. 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.

How many types of heat exchangers are there?

twoThere are two main types of regenerative heat exchangers—static heat exchangers and dynamic heat exchangers.

Which heat exchanger is most efficient?

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.

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.

Does turbulence increase heat transfer?

A turbulent flow increases the amount of air resistance and noise; however, a turbulent flow also accelerates heat conduction and thermal mixing.

What is the basic difference between 1 1 and 2/4 heat exchanger?

1–2 HX means 1 shell and 2 pass HX same with 2–4 HX as 2 shell and 4 pass. In a single shell HX the shell is horizontally divided into 2 segments where the tube inverts as a u-tube to pass from both the segments of the shell.

Is condenser a heat exchanger?

A condenser unit used in central air conditioning systems typically has a heat exchanger section to cool down and condense incoming refrigerant vapor into liquid, a compressor to raise the pressure of the refrigerant and move it along, and a fan for blowing outside air through the heat exchanger section to cool the …

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

Now for same mass flowrate and same inlet and outlet conditions of temperature the LMTD OF COUNTER FLOW HEAT EXCHANGER WILL BE MORE COMPARED TO PARALLEL FLOW HEAT EXCHANGER as the flow is in opposite direction. Hence the area for counter flow heat exchanger will be LESS compared to parallel flow heat exchanger.

Which one is more efficient a tubular heat exchanger or a shell and tube heat exchanger?

It depends on the heat transfer coefficient and the required heat transfer area. For more rate of heat transfer shell and tube heat exchanger will be preferred. If the required surface area is small than tubular heat exchanger will be preferred.

How do I choose a heat exchanger?

The following criteria can help in selecting the type of heat exchanger best suited for a given process:Application (i.e. sensible vapor or liquid, condensing or boiling)Operating pressures & temperatures (including startup, shutdown, normal & process upset conditions)More items…

How can you increase the effectiveness of a heat exchanger?

Here are 5 proven industry practices to boost heat exchanger performance and maintain process efficiency:Online and Offline Cleaning. … Maintaining Heat Exchanger. … Periodic Cleaning. … Cleaning the PHE Manually. … Minimizing the Fouling Factor. … Analyzing and Addressing Issues in Heat Exchanger Efficiency.

Why are heat exchangers important?

Within industrial plants and factories heat exchangers are required to keep machinery, chemicals, water, gas, and other substances within a safe operating temperature.

Does heat transfer increase with flow rate?

In other words, the rate of heat transfer is directly proportional to mass flow rate. If you increase the flow rate, you will then increase the rate of heat transfer.

What are the two types of heat exchangers?

There are two main types of regenerative heat exchangers—static heat exchangers and dynamic heat exchangers.