Heat Exchanger Thermal Rating

How to Use this Calculator ?

Shell Side Stream

Tube Side Stream

Mass Flowrate (kg/h)

Enter either shell or tube side flow and '0' for the other flow

For all properties refer to component property section on the website in advanced feature.

*= compulsory field

Cp (Kj/KgK) *

Inlet temp (C) *

Outlet temp (C) *

Shell Side Inputs

Tube Side Inputs

Fluid Details at avg conditions

Density (kg/m3)

ID (mm)

Viscosity (cP)

Od (mm)

Wall Viscosity (cP)

L (mm)

K (W/mK)

No of tubes *

Shell ID (mm)

* (If you want programme to calculate , enter 1 )

Baffle spacing (mm)

Passes

Fouling factor (m2.K/w)

Dist between tubes OD (mm)-square pitch

Density (kg/m3)

Visc (cP)

Service	Fouling Factor
water	0.0002-0.0004
Air	0.0004
Kerosene	0.0002
MEA	0.0004

Visc wall (cP)

k (W/mK)

n-0.4 for fluid heating

n-0.33 for fluid cooling.

Fouling factor (m2.K/W)

For your reference Typical U(W/m2K)

Service	Fouling Factor
Liquid/Liquid
Liquid/Gas
Gas/Gas

Estimated U (w/m2K) for fouled service

Output

Calculated U (W/m2K) for fouled service.

Iterate by changing estimated U till calculated % excess area designed is satisfactory i.e within 5%.

% excess area designed

Duty (kW)

Area (m2)

LMTD

F (-) (Cross flow correction fctor

Required UA (W/K)

Shell Side Details

Tube Side Details

Shell side h(W/m2K)

Tube side h(W/m2K)

Min shell dia recommended

Number of tubes

Tube dp (Pa)

Tube velocity m/s

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