Property Estimation Joback Method

Property Estimation Joback Method

The Joback method is a group contribution method which calculates thermophysical and transport properties as a function of the sum of group parameters. It uses a very simple and easy to assign group scheme. This article shows how to calculate properties using Joback Method in an excel spreadsheet. Example Estimate properties for 1-Butanol based on …

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Heat Exchanger Rating (Bell-Delaware Method)

Heat Exchanger Rating (Bell-Delaware Method)

In Bell Delaware method, the fluid flow in the shell is divided into a number of individual streams. Each of these streams introduces a correction factor which is used to correct heat transfer coefficient and pressure drop across the shell. This article gives step-by-step guidance on doing heat exchanger rating analysis based on Bell-Delware method. …

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LMTD Correction Factor Charts

LMTD Correction Factor Charts

Heat transfer rate in the exchanger is represented by q = U * A * F * LMTD here F (< 1) is interpreted as a geometric correction factor, that when applied to the LMTD (Log Mean Temperature Difference) of a counter flow heat exchanger, provides the effective temperature difference of the heat exchanger under …

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Estimating Binary Interaction Parameter for Peng Robinson EOS

Estimating Binary Interaction Parameter for Peng Robinson EOS

This article shows how to estimate binary interaction parameter (BIP) used in Peng Robinson (PR) Equation of State (EOS) from experimental data by regression in excel spreadsheet. Example Determine binary interaction parameter used in Peng Robinson EOS for a mixture of acetone and chloroform from Tx-y experimental data available at 101.33 kPa. Obtain pure component …

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Simple Multicomponent Distillation

Simple Multicomponent Distillation

This article shows application of Thiele and Geddes method to solve simple multi-component distillation problem in excel spreadsheet based on θ method of convergence. Antoine equation is used to calculate equilibrium constant Ki. Ki = exp(Ai – Bi / (T + Ci))/P where, Ai, Bi & Ci are Antoine equation constants for a component i, …

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Double Pipe Heat Exchanger Design

Double Pipe Heat Exchanger Design

This article shows how to do design for Double Pipe Heat Exchanger and estimate length of double pipe required. Determine Heat Load Obtain flowrate (W ), inlet, outlet temperatures and fouling factor for both hot and cold stream. Calculate physical properties like density (ρ), viscosity (μ), specific heat (Cp) and thermal conductivity (k) at mean …

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Flash Calculation (Raoult’s Law)

Flash Calculation (Raoult’s Law)

This article shows step by step procedure to do Bubble Point, Dew Point and Flash Calculation based on Raoult’s Law. Bubble Point Calculation Bubble point of a system is the temperature at which liquid mixture begins to vaporize. Obtain process parameters Get liquid mixture molar composition ( Xi ) and Pressure (P) of the system. …

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Heat Exchanger Analysis

Heat Exchanger Analysis

Heat Exchanger Analysis based on Effectiveness (ε) – NTU method is done when inlet temperatures are known and outlet temperatures are to be determined. Obtain Process Parameters Get process stream mass flowrate (M), specific heat (Cp) and inlet temperature (T). Obtain the heat transfer area (A) and overall heat transfer coefficient (U) for the given …

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