Vehicle fuel cell with low specific speed centrifugal compressor design(b)
Fuel cell air pressurization system specific requirements are: compact size, quality, lightweight, air supply free of oil and gas pollution, low noise, maintain low-cost, low-cost and high hp ev088aa, hp 417066-001 efficiency [3]. Current volumetric air compressor in the fuel cell system widely used, the most typical are screw-type compressor; but its difficult with the turbo-matching, it can not be recycled exhaust energy, achieve further energy saving. Exhaust energy recovery, at present only through the turbine and centrifugal compressor matching to achieve. Centrifugal compressor also has a fast response, long life and the many advantages of high efficiency, is considered the most promising future of one of the hp f4486b, f4486a ways supercharger.
Fuel cell system is currently not sufficient to drive turbine exhaust energy Driven Compressor job, so an auxiliary power source is essential. Ultra-high-speed (about 60000r.min-1) motors can be used as an effective auxiliary power source of one of the hp cgr-b1870ae, bta0302001 options. Honeywell is developing a super high-speed motor auxiliary drive high specific speed centrifugal turbocharger [4]. This makes high-pressure compressor application of fuel cell air pressurization system is more compact in response to speed up. However, the application of ultra-high-speed motor, there are many questions, such as high cost, maintenance complex, the stability of the poor, require special cooling measures, and there is a high-speed rotating shaft handle complicated issues such as load balance, hindering the commercialization of fuel cell engine, which so that the promotion of fuel cell vehicles become a problem [5].
Ordinary high-speed (about 20000r.min-1) motors are ultra-high-speed motor to avoid the above hp pavilion zd7000 battery, hp pp2182d disadvantage. However, if the centrifugal compressor is still more than conventional high-speed design, compression ratio can reach 1.1 ~ 1.2 [6], fuel cell system can not satisfy the demand for the supercharger. Therefore, we must design and development of a new centrifugal compressor to make it in the same rotational speed and flow conditions, the compression ratio substantially improve, that is, design of low specific speed centrifugal compressor. In low-speed conditions than the design of high efficiency, wide operating range of centrifugal compressor is a great challenge, both hp laptop battery at home and abroad rarely have the relevant information for reference.