نوع مقاله : مقاله پژوهشی
نویسندگان
1 شیراز، دانشگاه صنعتی شیراز
2 شیراز، دانشگاه صنعتی شیراز، بخش مهندسی شیمی
3 عمان، دانشگاه سلطان قابوس
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In common natural gas pressure reducing stations, gas heaters and throttle valves are used for pre-heating and pressure reducing. The gas heaters are used to prevent the hydrate formation after the station because of temperature reduction. In this work, in addition to study the existence of gas heaters in common stations, four substitute methods are presented and together with the commonly used method are simulated for 5 hot-climate cities in Fars province, i.e., Darab, Lar, Lamerd, Mohr and Farashband. These four methods are comprised of: 1- Use of an expansion turbine in place for the throttle valve, 2- Use of an expansion turbine for pressure reduction and an electric heater instead of the gas-burning heater, 3- Use of a vortex tube for the throttle valve, 4- Use of an evaporation-condensation cycle instead for the gas-burning heater. Heating loads and gas consumption for the commonly used method and suggestive methods are compared. Furthermore, the work gained through the use of the expansion turbine was calculated and reported. The expansion turbine and vortex tube need most and least heating loads and gas consumptions for preheating, respectively. The expansion-condensation cycle need lower heating load because of its higher efficiency in comparison of the direct gas-burning heater
کلیدواژهها [English]
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