Number of Transfer Units for Plate Heat Exchanger Calculator

✖Outlet Temperature of Fluid is temperature that it attained after passing through a heat exchanger.ⓘ Outlet Temperature [T_Outlet]			+10% -10%
✖Inlet Temperature is the temperature of fluid before entering into a heat exchanger.ⓘ Inlet Temperature [T_Inlet]			+10% -10%
✖Log Mean Temperature Difference is the logarithmic temperature difference averaged between 2 fluid streams exchanging heat.ⓘ Log Mean Temperature Difference [ΔT_LMTD]			+10% -10%

✖Number of Transfer Units is a dimensionless parameter used to characterize the heat transfer performance of Heat Exchanger.ⓘ Number of Transfer Units for Plate Heat Exchanger [NTU]

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Formula

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Number of Transfer Units for Plate Heat Exchanger

Formula

`"NTU" = ("T"_{"Outlet"}-"T"_{"Inlet"})/"ΔT"_{"LMTD"}`

Example

`"1.199999"=("345K"-"298K")/"39.1667K"`

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Number of Transfer Units for Plate Heat Exchanger Solution

STEP 0: Pre-Calculation Summary

Formula Used

Number of Transfer Units = (Outlet Temperature-Inlet Temperature)/Log Mean Temperature Difference
NTU = (T_Outlet-T_Inlet)/ΔT_LMTD
This formula uses 4 Variables

Variables Used

Number of Transfer Units - Number of Transfer Units is a dimensionless parameter used to characterize the heat transfer performance of Heat Exchanger.
Outlet Temperature - (Measured in Kelvin) - Outlet Temperature of Fluid is temperature that it attained after passing through a heat exchanger.
Inlet Temperature - (Measured in Kelvin) - Inlet Temperature is the temperature of fluid before entering into a heat exchanger.
Log Mean Temperature Difference - (Measured in Kelvin) - Log Mean Temperature Difference is the logarithmic temperature difference averaged between 2 fluid streams exchanging heat.

STEP 1: Convert Input(s) to Base Unit

Outlet Temperature: 345 Kelvin --> 345 Kelvin No Conversion Required
Inlet Temperature: 298 Kelvin --> 298 Kelvin No Conversion Required
Log Mean Temperature Difference: 39.1667 Kelvin --> 39.1667 Kelvin No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

NTU = (T_Outlet-T_Inlet)/ΔT_LMTD --> (345-298)/39.1667

Evaluating ... ...

NTU = 1.19999897872427

STEP 3: Convert Result to Output's Unit

1.19999897872427 --> No Conversion Required

FINAL ANSWER

1.19999897872427 ≈ 1.199999 <-- Number of Transfer Units

(Calculation completed in 00.004 seconds)

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Home » Engineering » Chemical Engineering » Process Equipment Design » Heat Exchangers » Basic Formulas Of Heat Exchanger Designs » Number of Transfer Units for Plate Heat Exchanger

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< 25 Basic Formulas Of Heat Exchanger Designs Calculators

Pressure Drop of Vapor in Condensers given Vapors on Shell Side

Go Shell Side Pressure Drop = 0.5*8*Friction Factor*(Length of Tube/Baffle Spacing)*(Shell Diameter/Equivalent Diameter)*(Fluid Density/2)*(Fluid Velocity^2)*((Fluid Viscosity at Bulk Temperature/Fluid Viscosity at Wall Temperature)^-0.14)

Shell Side Pressure Drop in Heat Exchanger

Go Shell Side Pressure Drop = (8*Friction Factor*(Length of Tube/Baffle Spacing)*(Shell Diameter/Equivalent Diameter))*(Fluid Density/2)*(Fluid Velocity^2)*((Fluid Viscosity at Bulk Temperature/Fluid Viscosity at Wall Temperature)^-0.14)

Tube Side Pressure Drop in Heat Exchanger for Turbulent Flow

Go Tube Side Pressure Drop = Number of Tube-Side Passes*(8*Friction Factor*(Length of Tube/Pipe Inner Diameter)*(Fluid Viscosity at Bulk Temperature/Fluid Viscosity at Wall Temperature)^-0.14+2.5)*(Fluid Density/2)*(Fluid Velocity^2)

Tube Side Pressure Drop in Heat Exchanger for Laminar Flow

Reynolds Number for Condensate Film Outside Vertical Tubes in Heat Exchanger

Go Reynold Number = 4*Mass Flowrate/(pi*Pipe Outer Diameter*Number of Tubes*Fluid Viscosity at Bulk Temperature)

Reynolds Number for Condensate Film Inside Vertical Tubes in Condenser

Go Reynold Number = 4*Mass Flowrate/(pi*Pipe Inner Diameter*Number of Tubes*Fluid Viscosity at Bulk Temperature)

Number of Tubes in Shell and Tube Heat Exchanger

Go Number of Tubes = 4*Mass Flowrate/(Fluid Density*Fluid Velocity*pi*(Pipe Inner Diameter)^2)

Shell Area for Heat Exchanger

Go Shell Area = (Tube Pitch-Pipe Outer Diameter)*Shell Diameter*(Baffle Spacing/Tube Pitch)

Stack Design Pressure Draft for Furnace

Go Draft Pressure = 0.0342*(Stack Height)*Atmospheric Pressure*(1/Ambient Temperature-1/Flue Gas Temperature)

Number of Transfer Units for Plate Heat Exchanger

Go Number of Transfer Units = (Outlet Temperature-Inlet Temperature)/Log Mean Temperature Difference

Equivalent Diameter for Triangular Pitch in Heat Exchanger

Go Equivalent Diameter = (1.10/Pipe Outer Diameter)*((Tube Pitch^2)-0.917*(Pipe Outer Diameter^2))

Equivalent Diameter for Square Pitch in Heat Exchanger

Go Equivalent Diameter = (1.27/Pipe Outer Diameter)*((Tube Pitch^2)-0.785*(Pipe Outer Diameter^2))

Viscosity Correction Factor for Shell and Tube Heat Exchanger

Go Viscosity Correction Factor = (Fluid Viscosity at Bulk Temperature/Fluid Viscosity at Wall Temperature)^0.14

Pumping Power Required in Heat Exchanger Given Pressure Drop

Go Pumping Power = (Mass Flowrate*Tube Side Pressure Drop)/Fluid Density

Heat Exchanger Volume for Hydrocarbon Applications

Go Heat Exchanger Volume = (Heat Duty of Heat Exchanger/Log Mean Temperature Difference)/100000

Heat Exchanger Volume for Air Separation Applications

Go Heat Exchanger Volume = (Heat Duty of Heat Exchanger/Log Mean Temperature Difference)/50000

Provision for Thermal Expansion and Contraction in Heat Exchanger

Go Thermal Expansion = (97.1*10^-6)*Length of Tube*Temperature Difference

Number of Tubes in Eight Pass Triangular Pitch given Bundle Diameter

Go Number of Tubes = 0.0365*(Bundle Diameter/Pipe Outer Diameter)^2.675

Number of Tubes in Six Pass Triangular Pitch given Bundle Diameter

Go Number of Tubes = 0.0743*(Bundle Diameter/Pipe Outer Diameter)^2.499

Number of Tubes in Four Pass Triangular Pitch given Bundle Diameter

Go Number of Tubes = 0.175*(Bundle Diameter/Pipe Outer Diameter)^2.285

Number of Tubes in One Pass Triangular Pitch given Bundle Diameter

Go Number of Tubes = 0.319*(Bundle Diameter/Pipe Outer Diameter)^2.142

Number of Tubes in Two Pass Triangular Pitch given Bundle Diameter

Go Number of Tubes = 0.249*(Bundle Diameter/Pipe Outer Diameter)^2.207

Number of Tubes in Center Row Given Bundle Diameter and Tube Pitch

Go Number of Tubes in Vertical Tube Row = Bundle Diameter/Tube Pitch

Number of Baffles in Shell and Tube Heat Exchanger

Go Number of Baffles = (Length of Tube/Baffle Spacing)-1

Shell Diameter of Heat Exchanger Given Clearance and Bundle Diameter

Go Shell Diameter = Shell Clearance+Bundle Diameter

Number of Transfer Units for Plate Heat Exchanger Formula

Number of Transfer Units = (Outlet Temperature-Inlet Temperature)/Log Mean Temperature Difference
NTU = (T_Outlet-T_Inlet)/ΔT_LMTD

What is Plate Heat Exchanger?

A Plate Heat Exchanger (PHE) is a type of heat exchanger used to transfer heat between two fluids, without the fluids coming into direct contact with each other. It consists of a series of closely spaced metal plates with channels or gaps between them. The fluids flow through these gaps, and heat is exchanged between them through the plates.

What is Significance of NTU in Heat Exchanger?

The NTU (Number of Transfer Units) is a crucial parameter used to analyze and design heat exchangers, including plate heat exchangers. It quantifies the effectiveness of the heat exchanger and provides valuable information about the heat transfer performance.
It simplifies the analysis and design process, making it easier to understand and optimize heat exchanger performance.

How to Calculate Number of Transfer Units for Plate Heat Exchanger?

Number of Transfer Units for Plate Heat Exchanger calculator uses Number of Transfer Units = (Outlet Temperature-Inlet Temperature)/Log Mean Temperature Difference to calculate the Number of Transfer Units, The Number Of Transfer Units For Plate Heat Exchanger formula is defined as a dimensionless parameter that characterizes the heat transfer performance of Heat Exchanger. It determines the effectiveness of heat exchanger. Number of Transfer Units is denoted by NTU symbol.

How to calculate Number of Transfer Units for Plate Heat Exchanger using this online calculator? To use this online calculator for Number of Transfer Units for Plate Heat Exchanger, enter Outlet Temperature (T_Outlet), Inlet Temperature (T_Inlet) & Log Mean Temperature Difference (ΔT_LMTD) and hit the calculate button. Here is how the Number of Transfer Units for Plate Heat Exchanger calculation can be explained with given input values -> 1.566667 = (345-298)/39.1667.

FAQ

What is Number of Transfer Units for Plate Heat Exchanger?

The Number Of Transfer Units For Plate Heat Exchanger formula is defined as a dimensionless parameter that characterizes the heat transfer performance of Heat Exchanger. It determines the effectiveness of heat exchanger and is represented as NTU = (T_Outlet-T_Inlet)/ΔT_LMTD or Number of Transfer Units = (Outlet Temperature-Inlet Temperature)/Log Mean Temperature Difference. Outlet Temperature of Fluid is temperature that it attained after passing through a heat exchanger, Inlet Temperature is the temperature of fluid before entering into a heat exchanger & Log Mean Temperature Difference is the logarithmic temperature difference averaged between 2 fluid streams exchanging heat.

How to calculate Number of Transfer Units for Plate Heat Exchanger?

The Number Of Transfer Units For Plate Heat Exchanger formula is defined as a dimensionless parameter that characterizes the heat transfer performance of Heat Exchanger. It determines the effectiveness of heat exchanger is calculated using Number of Transfer Units = (Outlet Temperature-Inlet Temperature)/Log Mean Temperature Difference. To calculate Number of Transfer Units for Plate Heat Exchanger, you need Outlet Temperature (T_Outlet), Inlet Temperature (T_Inlet) & Log Mean Temperature Difference (ΔT_LMTD). With our tool, you need to enter the respective value for Outlet Temperature, Inlet Temperature & Log Mean Temperature Difference and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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