Logarithmic mean temperature difference for single pass counter flow Calculator

Category	Physics ↺
Physics	Heat and Mass Transfer ↺
Heat-And-Mass-Transfer	Heat exchanger ↺
Heat-Exchanger

✖Entry temperature of hot fluid is the temperature of the hot fluid at entryⓘ Entry temperature of hot fluid [T1]			+10% -10%
✖Exit temperature of cold fluid is the temperature of the cold fluid at exitⓘ Exit temperature of cold fluid [t2]			+10% -10%
✖Entry temperature of cold fluid is the temperature of the cold fluid at entryⓘ Entry temperature of cold fluid [t1]			+10% -10%
✖Exit temperature of hot fluid is the temperature of the hot fluid at exitⓘ Exit temperature of hot fluid [T2]			+10% -10%

✖Logarithmic mean temperature difference is the log of mean of the temperature valuesⓘ Logarithmic mean temperature difference for single pass counter flow [ΔTm]

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Nishan Poojary

Shri Madhwa Vadiraja Institute of Technology and Management (SMVITM), Udupi

Nishan Poojary has created this Calculator and 400+ more calculators!

Anshika Arya

National Institute Of Technology (NIT), Hamirpur

Anshika Arya has verified this Calculator and 400+ more calculators!

< 10 Other formulas that you can solve using the same Inputs

Mass flow rate of cold fluid

Mass flow rate of cold fluid=(Effectiveness of Heat Exchanger*Smaller value /Specific heat of cold fluid)*(1/((Exit temperature of cold fluid-Entry temperature of cold fluid)/(Entry temperature of hot fluid-Entry temperature of cold fluid))) GO

Specific heat of cold fluid

Specific heat of cold fluid=(Effectiveness of Heat Exchanger*Smaller value /Mass flow rate of cold fluid)*(1/((Exit temperature of cold fluid-Entry temperature of cold fluid)/(Entry temperature of hot fluid-Entry temperature of cold fluid))) GO

Mass flow rate of hot fluid

Mass flow rate of hot fluid=(Effectiveness of Heat Exchanger*Smaller value /Specific heat of hot fluid)*(1/((Entry temperature of hot fluid-Exit temperature of cold fluid)/(Entry temperature of hot fluid-Entry temperature of cold fluid))) GO

Specific heat of hot water

Specific heat of hot fluid=(Effectiveness of Heat Exchanger*Smaller value /Mass flow rate of hot fluid)*(1/((Entry temperature of hot fluid-Exit temperature of cold fluid)/(Entry temperature of hot fluid-Entry temperature of cold fluid))) GO

Effectiveness when mccc is the minimum value

Effectiveness of Heat Exchanger=(Mass flow rate of cold fluid*Specific heat of cold fluid/Smaller value )*((Exit temperature of cold fluid-Entry temperature of cold fluid)/(Entry temperature of hot fluid-Entry temperature of cold fluid)) GO

Effectiveness when mhch is the minimum value

Effectiveness of Heat Exchanger=(Mass flow rate of hot fluid*Specific heat of hot fluid/Smaller value )*((Entry temperature of hot fluid-Exit temperature of cold fluid)/(Entry temperature of hot fluid-Entry temperature of cold fluid)) GO

Entry temperature of cold fluid

Entry temperature of cold fluid=Entry temperature of hot fluid-(Heat exchanged/(Effectiveness of Heat Exchanger*Smaller value )) GO

Entry temperature of hot fluid

Entry temperature of hot fluid=(Heat exchanged/(Effectiveness of Heat Exchanger*Smaller value ))+Entry temperature of cold fluid GO

Effectiveness ( NTU method)

Effectiveness of Heat Exchanger=Heat exchanged/(Smaller value *(Entry temperature of hot fluid-Entry temperature of cold fluid)) GO

Heat exchanged (NTU method)

Heat exchanged=Effectiveness of Heat Exchanger*Smaller value *(Entry temperature of hot fluid-Entry temperature of cold fluid) GO

< 2 Other formulas that calculate the same Output

Logarithmic mean temperature difference

Logarithmic mean temperature difference=Heat exchanged/(Correction factor*Overall heat transfer coefficient*Area) GO

Logarithmic mean of temperature difference

Logarithmic mean temperature difference=heat flow rate/(Area*Overall Heat Transfer Coefficient) GO

Logarithmic mean temperature difference for single pass counter flow Formula

Logarithmic mean temperature difference=((Entry temperature of hot fluid-Exit temperature of cold fluid)-(Entry temperature of cold fluid-Exit temperature of hot fluid))/ln((Entry temperature of hot fluid-Exit temperature of cold fluid)/(Entry temperature of cold fluid-Exit temperature of hot fluid))
ΔTm=((T1-t2)-(t1-T2))/ln((T1-t2)/(t1-T2))

More formulas

Heat exchanged GO

Correction factor in heat exchanger GO

Overall heat transfer coefficient GO

Area of the heat exchanger GO

Logarithmic mean temperature difference GO

Heat exchanged (NTU method) GO

Entry temperature of hot fluid GO

Entry temperature of cold fluid GO

Mass flow rate of hot fluid GO

Specific heat of hot water GO

Mass flow rate of cold fluid GO

Specific heat of cold fluid GO

Location factor at distance X of heat exchanger GO

Convective heat transfer coefficient of storage type heat exchanger GO

Heat transfer surface area for unit length of matrix in storage type heat exchanger GO

Specific heat of fluid in storage type heat exchanger GO

Mass flowrate of the fluid in storage type heat exchanger GO

Time factor of a storage type heat exchanger GO

Convective heat transfer coefficient of storage type heat exchanger given time factor GO

Heat transfer surface area for unit length given time factor GO

Time taken for the heat transfer GO

Specific heat of matrix material GO

Mass of solid per unit length of the matrix GO

What is Heat exchanger?

A heat exchanger is a system used to transfer heat between two or more fluids. Heat exchangers are used in both cooling and heating processes. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, petroleum refineries, natural-gas processing, and sewage treatment. The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air. Another example is the heat sink, which is a passive heat exchanger that transfers the heat generated by an electronic or a mechanical device to a fluid medium, often air or a liquid coolant.

How to Calculate Logarithmic mean temperature difference for single pass counter flow?

Logarithmic mean temperature difference for single pass counter flow calculator uses Logarithmic mean temperature difference=((Entry temperature of hot fluid-Exit temperature of cold fluid)-(Entry temperature of cold fluid-Exit temperature of hot fluid))/ln((Entry temperature of hot fluid-Exit temperature of cold fluid)/(Entry temperature of cold fluid-Exit temperature of hot fluid)) to calculate the Logarithmic mean temperature difference, The Logarithmic mean temperature difference for single pass counter flow formula is defined as the log of mean difference of temperature values of the fluids flowing in counter in single pass. Logarithmic mean temperature difference and is denoted by ΔTm symbol.

How to calculate Logarithmic mean temperature difference for single pass counter flow using this online calculator? To use this online calculator for Logarithmic mean temperature difference for single pass counter flow, enter Entry temperature of hot fluid (T1), Exit temperature of cold fluid (t2), Entry temperature of cold fluid (t1) and Exit temperature of hot fluid (T2) and hit the calculate button. Here is how the Logarithmic mean temperature difference for single pass counter flow calculation can be explained with given input values -> NaN = ((60-25)-(10-30))/ln((60-25)/(10-30)).

FAQ

What is Logarithmic mean temperature difference for single pass counter flow?

The Logarithmic mean temperature difference for single pass counter flow formula is defined as the log of mean difference of temperature values of the fluids flowing in counter in single pass and is represented as ΔTm=((T1-t2)-(t1-T2))/ln((T1-t2)/(t1-T2)) or Logarithmic mean temperature difference=((Entry temperature of hot fluid-Exit temperature of cold fluid)-(Entry temperature of cold fluid-Exit temperature of hot fluid))/ln((Entry temperature of hot fluid-Exit temperature of cold fluid)/(Entry temperature of cold fluid-Exit temperature of hot fluid)). Entry temperature of hot fluid is the temperature of the hot fluid at entry, Exit temperature of cold fluid is the temperature of the cold fluid at exit, Entry temperature of cold fluid is the temperature of the cold fluid at entry and Exit temperature of hot fluid is the temperature of the hot fluid at exit.

How to calculate Logarithmic mean temperature difference for single pass counter flow?

The Logarithmic mean temperature difference for single pass counter flow formula is defined as the log of mean difference of temperature values of the fluids flowing in counter in single pass is calculated using Logarithmic mean temperature difference=((Entry temperature of hot fluid-Exit temperature of cold fluid)-(Entry temperature of cold fluid-Exit temperature of hot fluid))/ln((Entry temperature of hot fluid-Exit temperature of cold fluid)/(Entry temperature of cold fluid-Exit temperature of hot fluid)). To calculate Logarithmic mean temperature difference for single pass counter flow, you need Entry temperature of hot fluid (T1), Exit temperature of cold fluid (t2), Entry temperature of cold fluid (t1) and Exit temperature of hot fluid (T2). With our tool, you need to enter the respective value for Entry temperature of hot fluid, Exit temperature of cold fluid, Entry temperature of cold fluid and Exit temperature of hot fluid and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Logarithmic mean temperature difference?

In this formula, Logarithmic mean temperature difference uses Entry temperature of hot fluid, Exit temperature of cold fluid, Entry temperature of cold fluid and Exit temperature of hot fluid. We can use 2 other way(s) to calculate the same, which is/are as follows -

Logarithmic mean temperature difference=Heat exchanged/(Correction factor*Overall heat transfer coefficient*Area)
Logarithmic mean temperature difference=heat flow rate/(Area*Overall Heat Transfer Coefficient)

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