Abstract:
Today natural gas has been attracting significant attention by the world since its combustion
release small amount of greenhouse gases compared to other fossil fuel. Natural gas is a mixture
of heavy and light hydrocarbon with small amount of impurities but mainly composed by
Methane. The separation of desirable product and byproduct take place in a gas processing plant
or facility. During these activities not all processed gas is exported to the consumer rather a
considerable amount of natural gas is typically consumed by natural gas processing plants in
order to power gas turbines for the generation of electricity and mechanical power within the
facility. Worldwide energy efficiency in industry plays key roles in improving energy security,
environmental sustainability and economic performance. Hence, in this thesis the main aim was
to enhance the efficiency fuel gas consumption through installation of a compressor booster to
control the suction pressure of the low-pressure compressor and the study has been conducted
based on a case study in a gas processing facility. A protype of gas compression at gas
processing plant was built and its flowsheet model has been designed and simulate in Aspen
HYSYS. The fuel gas consumption data for the gas plant main fuel gas user (LP and HP
compressor and gas turbine generator) has been collected. Parametric studies were performed
and variables like pressure, flowrate, work, pressure ratio and fuel gas quantity were analyzed on
both sides (simulation and collected data). The collected data analysis results were shown that
LP compressor unit was the main contributor to the total fuel gas consumption and excess total
fuel gas consumption respectively where it is consuming ~ 9500GJ/day and ~ 3000GJ/day fuel
gas respectively. The analysis of simulated results as well as of the collected ones have indicated
that a high compression ratio above ~3 the driving force to excess of fuel gas consumption and
the use of small compressor as a booster significantly enhance the efficient of fuel gas since it
reduced the fuel gas flow rate 430.7 Kgmol/h up to 400.5kgmol/h.
