کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
646581 884567 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
System thermodynamic performance comparison of CO2-EGS and water-EGS systems
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
System thermodynamic performance comparison of CO2-EGS and water-EGS systems
چکیده انگلیسی


• Comparing the performance of CO2-EGS and water-EGS for various conditions.
• Presenting the scope of applications for these two kinds of EGS systems.
• Cooling after compression before the CO2 is injected improves CO2-EGS performance.
• There is an optimum recoverable thermal energy content for CO2-EGS.

CO2 may be a better heat transmission fluid than water for Enhanced Geothermal Systems (EGS). The advantages and disadvantages of these two kinds of EGS are the focus of this study. The water and CO2-EGS system models including simple subsurface heat transfer and flow models and a surface energy conversion system model were designed based on the reservoir grade and the ambient temperatures. The results indicate that the operating parameters including the injection pressure, turbine outlet pressure and reservoir stimulated area should be optimized to match the actual CO2-EGS conditions. CO2-EGS produce more power than water-EGS for reservoirs with low recoverable thermal energies due to less irreversible losses compared to ORC or flash cycles for water-EGS. However, high resistance losses caused by high mass flow rates degrade the CO2-EGS performance; thus, the water-EGS has better performance than CO2-EGS for larger energy content reservoirs.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 61, Issue 2, 3 November 2013, Pages 236–244
نویسندگان
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