کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11027974 | 1666144 | 2018 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Development and experimental investigation of an oil-free twin-screw air compressor for fuel cell systems
ترجمه فارسی عنوان
توسعه و بررسی تجربی یک کمپرسور هوا دوتایی پیچ برای سیستم های سوخت سلولی
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کلمات کلیدی
منبع هوا، سیستم سلول سوختی، بدون روغن، بدون چربی، کمپرسور دوقلو،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Compressor in air supply circuit influences flow rate of oxygen in cathode of polymer electrolyte membrane (PEM) fuel cell systems. In this paper, an air-cooled dry oil-free twin-screw compressor for fuel cell systems was developed and adopted successfully in a type of truck with fuel cell system. Extensive experimental investigations including the recording of p-V indicator diagram were carried out to study the performance of the prototype compressor. Rotation speed of the female rotor varied from 5000â¯rpm to 10,000â¯rpm, and discharge pressure from 0.14â¯MPa to 0.22â¯MPa. It was found that the volume flow rate decreases almost linearly with the reduction of rotation speed and this is beneficial to the fuel cell systems under part-load. Between speed of 7000â¯rpm and 10,000â¯rpm at a given discharge pressure, the variations of isentropic efficiency and specific power are very limited. This indicates the twin-screw compressor can operate efficiently in a wide range of power output from the fuel cell systems. Under the design conditions with discharge pressure of 0.2â¯MPa and female rotor rotation speed of 9000â¯rpm for a fuel cell output of 50â¯kW, the volumetric efficiency and isentropic efficiency of the prototype compressor developed are 70% and 55% respectively. And the mechanical efficiency and the polytropic process index regarding to discharge temperature are 80% and 1.58. These values can be used in the design of other air-cooled dry oil-free twin-screw compressors for similar applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 145, 25 December 2018, Pages 755-762
Journal: Applied Thermal Engineering - Volume 145, 25 December 2018, Pages 755-762
نویسندگان
Yongning He, Linfen Xing, Yeqiang Zhang, Jun Zhang, Feng Cao, Ziwen Xing,