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Thermodynamic Model for Relating Volumetric to Mass Flow Rate for Natural Gas

Sahari, Siti Aishah (2005) Thermodynamic Model for Relating Volumetric to Mass Flow Rate for Natural Gas. Universiti Teknologi Petronas. (Unpublished)

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Abstract

This project presents a method of measuring mass flow rate of natural gas using a reliable Equation of State (EOS) to eliminate the use of expensive coriolis meter. Natural gas is an alternative vehicle fuel that has long been proposed as a way to provide significant air quality benefits over petroleum fuels. Unlike gasoline or diesel gas that can be measured in volumetric flow rate, natural gas needs to be measured in mass flow rate. Only coriolis meter is available in the market that can give the reading in mass per unit time while the other flow meters give the volumetric reading. However, the high cost of coriolis meter has led to the research of finding another alternative to measure mass flow rate of natural gas. The method considered in the study is to have the volumetric flow rate measured, prior to converting it to mass flow rate using a suitableEquationof State (EOS). In orderto complete this project, there are four critical stages involved. The first stage is to conduct several experiments using a Test Rig Dispenser to obtain Pressure-Volume- Temperature (PVT) relation of natural gas. These data are then being used for the purpose of performing computation of errors for the tested EOSs. Errors for all of the EOSs are then compared to determine the EOS that gives the smallest error percentage. After that, another stage to validate the obtained EOS is done. In this stage, the EOS is used along with PVT data to compute mass flow rate of the natural gas dispensed. This mass flow rate from the computation is then being compared to the measured value of coriolis meter. From the results of dynamic experiment, it is observed that ideal gas law gives smallest error percentage followed by SRK, Lee-Kesler, Peng-Robinson, Van der Waals and Virial equation of state. However, from the static experiment, SRK gives the smallest error followed by Lee-Kesler Plocker, Peng-Robinson, Van der Waals, Virial, and ideal gas equation. The static experiment gives more accurate result since all thermodynamic properties are taken at their steady state condition.

Item Type: Final Year Project
Academic Subject : Academic Department - Chemical Engineering - Environment
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Users 2053 not found.
Date Deposited: 02 Oct 2013 15:59
Last Modified: 25 Jan 2017 09:46
URI: http://utpedia.utp.edu.my/id/eprint/8127

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