Optimization And Development Of Regenerative Exergy System For Gas Wellhead Facilities To Produce Electrical Energy
In this article the application of a turbo expander in a gas well has been studied technically economically and thermodynamically for the purpose of recycling the wasted exergy in a chock valve, reducing the gas pressure as well as generating huge amount of electrical power through a generator are among the advantages of applying an expansion turbine instead of chock valve. On the other hand this method is a clean method of energy production since no fuel is consumed for and no environmental pollution is caused through this method. In this thesis two software HYSYS and GAMS have been applied to calculate the productivity power in various pressure ranges and mass flow rate in different years of extractions when expansion turbine are used. Considering the necessary power of an infrastructure this system of calculation helps to determine the maximum life span of an expansion turbine in a gas well. This project is aimed at technical and economical planning and optimization of a mechanical package to recycle the pressure exergy of a gas well inlet chock valve in order to generate the electrical power both for the consumption of the infrastructure itself and for selling the extra amount.In administrating this project not only would the gas wells of the country become needless of electrical power but also the super flues amount at electricity could be sold to the national electricity network. Financial studies indicate that the capital returning period in this project for pressure range of 1850 – 4850 psig and mass flow rate of 21.2 kg/s at prices of 1600 $ per kilowatt hour and 0.12 $ per kilowatt hour for constructing a power station and the value of generated electricity respectively is estimated almost 3.5 years which economically appears really fascinating for the purpose of investment.
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