تحلیل انرژی و اگزرژی یک سامانۀ تولید چندگانۀ نوین مبتنی‌بر گازسازی زیست‌توده برای تولید همزمان برق، آب شیرین، حرارت و هیدروژن

نوع مقاله : مقاله پژوهشی

نویسندگان

1 مهندسی سیستم‌های انرژی، دانشکدۀ مهندسی مکانیک، دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران

2 گروه مهندسی مکانیک، دانشگاه صنعتی همدان، همدان ، ایران

3 گروه مهندسی مکانیک، دانشگاه صنعتی همدان، همدان، ایران

چکیده

در این پژوهش، تحلیل انرژی و اگزرژی بر یک سامانۀ تولید چندگانۀ نوین و یکپارچه، مبتنی‌بر گازسازی زیست‌توده انجام شده است. هدف این سامانه، تولید همزمان برق، آب شیرین، آب گرم و هیدروژن با آلایندگی کمتر، ازطریق گازسازی خاک‌ارۀ چوب کاج به‌عنوان سوخت زیستی است. سامانه شامل گازساز، گرم‌کن آب، الکترولایزر غشایی، چرخۀ رانکین ارگانیک با رکوپراتور، واحد نمک‌زدایی تبخیری و توربین گازی برای تولید برق است. نتایج نشان می‌دهد بازده انرژی و اگزرژی سامانه به‌ترتیب 80 و 55/42 درصد بوده و تخریب اگزرژی کل برابر 4065 کیلووات است. بیشترین سهم اتلاف اگزرژی مربوط به گازساز با 48 درصد و توربین گازی با 34 درصد است. مقایسه با مطالعات مشابه نشان می‌دهد بازده انرژی سامانۀ پیشنهادی در سطح بالاتری قرار دارد. افزایش فشار سیال عامل چرخۀ رانکین ارگانیک تا 5800 کیلوپاسکال با کاهش تخریب در مولد بخار، توان خالص را تا 3379 کیلووات و بازده انرژی را تا 45 درصد افزایش می‌دهد. همچنین، افزایش دمای هوای ورودی به محفظۀ احتراق تا 1300 درجۀ سلسیوس، توان خالص را به 3508 کیلووات و بازده اگزرژی را به 46 درصد می‌رساند.

کلیدواژه‌ها

موضوعات


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