Air supply systems are essential subsystems in proton exchange membrane (PEM) fuel cell systems. Compressors are the key devices of air supply techniques that greatly influence the characteristics of fuel cells. The simulation and experimental researches on a small centrifugal compressor with high rotation speed have already been introduced within this paper. Firstly, the input parameters of membrane compressor are obtained based on the productivity energy and operating stress of PEM fuel cells. Then, a prototype of little centrifugal compressors applied in PEM fuel cells is designed, simulated with all the computational liquid dynamics (CFD) method, and analyzed in actual working conditions. Lastly, the simulator outcomes show that the internal stream in compressors impacts the overall performance strongly. The discharge pressure from the simulator is close for the test data in the analyzed operating problems, and also the maximum error is less than 6Percent.
These days, energy and ecological problems have strongly drawn the interest of researchers during these areas. Various clean energy technologies have been recommended and studied. As one extremely efficient and clear power technologies, the polymer electrolyte membrane layer (PEM) fuel cell has been studied in recent years. The significant applications of PEM energy cellular material give attention to transportation, dispersed/fixed, and transportable power generation.1 As well as the PEM energy cell will become by far the most appealing selection for energy era today.2
The air provide system is one from the vital subsystems in PEM energy cell systems.3 The air provide system characteristics provide an essential impact on the performance of PEM fuel cell techniques. Manage methods as well as the effect on the energy cell output of the air provide system had been researched.4-7 In air supply systems, compressors are definitely the key gadgets that considerably impact the air supply system and also the qualities of fuel cells.
Based upon their operating principles, 2 kinds of compressors can be used in the PEM fuel cellular material, that is, positive displacement compressor and powerful compressor.
For positive displacement compressors, attach and scroll compressors were mainly chosen and looked into in the PEM energy cell system. Thinking about the working atmosphere requirements of PEM energy cellular material, the compressed air needs to be oil-free or with water. Therefore, the oil-totally free and water-administered attach compressor was investigated to be used within a 50 kW PEM fuel cell system.8, 9 The isentropic efficiency of the prototype compressor is 55Percent, having a release stress of .2 MPa as well as a speed of 9000 rpm. The water-injected scroll compressor was investigated to get a 30 kW PEM energy cell with 5000 rpm.10-12 Qin et al.13 researched the working stress influence on the performance of a 20 kW PEM fuel cell system based on the experimental overall performance of oxygen compressor. The final results show that the ideal system operating stress is all about 1.2 atm. The stress of air can be improved as much as 2 club effortlessly by screw and browse compressors. However the rotation velocity of the attach and scroll compressors can not be very high (generally lower than 10,000 rpm), which leads to the big volume and weight. Therefore, they are not appropriate for mobile devices really well.
As powerful compressors, centrifugal compressors are most likely best suited for PEM energy cells because they have such characteristics as high-speed (related to the smaller sized volume and lighter weight), low sound, higher efficiency, and dependability. Hence, many scientific study has analyzed centrifugal compressors in different factors.
Many researchers target the operation of centrifugal compressors in energy cell techniques to enhance the effectiveness of PEM energy cellular material and the balance of centrifugal compressors. Empirical models14, 15 of centrifugal compressors were introduced, and the available models were assessed using the experimental data. The powerful model of a centrifugal compressor able to system simulation within the digital tested computational environment was presented,16 which provided different compressor losses. Plus it can be employed to practically any centrifugal compressor and fuel cell system. A semi-mechanised and semi-imperial air supply system model based upon centrifugal air compressors was recognized to get a 150 kW PEM energy cell motor.3, 5 Experimental and simulation outcomes show that this air supply system has great accuracy and celerity for that air compressor control. A vehicle fuel cell system employing a two-phase turbo-compressor for air supply was investigated, and the results show which a two-stage turbo-compressor having a turbo-expander can considerably affect overall system energy and efficiency.17 Hu et al.18, 19 analyzed the optimization of velocity response of air compressor for hydrogen fuel cell car considering the transient current. Along with a new velocity regulation manage method (the transient current injection manage technique) was recommended.
Surge and stall are definitely the vital characteristics from the centrifugal compressor.20, 21 Azizi et al.22 analyzed the stall/rise of the multiple-stage compressor in a hybrid solid oxide fuel cell-gas turbine system. The results show that the compressor provides a sustained air flow price throughout the moderate stall/rise occasion. Godard et al.23 analyzed the surge characterization of a centrifugal compressor for fuel cell, and the compressor surges suddenly without any pre-stall exercise in a higher rotation speed. An agglomerate model is introduced, as well as a fuel cell system model such as a dynamic compressor is applied. The results suggest that this oxygen focus is most strongly impacted by the rise development of the compressor.24 Laghrouche et al.25 recommended a load governor according to constrained extremum looking for PEM energy cell o2 starvation and compressor rise protection, as well as the scheme was confirmed by experiment. A fuzzy reasoning manage solution was recommended for that compressor group supplying an inlayed 5 kW PEM fuel cell system.
A number of research target the style, overall performance optimisation, and new bearings of psa oxygen generator. A nonlinear autoregressive moving typical with exogenous inputs design for the air compressor of PEMFC system was recognized,26 and features a small fitted mistake. Wan et al.14 investigated the improved empirical guidelines style way of iugjby compressors in PEM fuel cell car programs. As well as the water-moisturized having for high-speed centrifugal compressors was analyzed by Ren et al..27, 28 The performance of centrifugal compressors for a energy cell was improved utilizing sleek optimisation and information exploration techniques.29
A number of these studies on centrifugal compressors used in PEM fuel cellular material are concerned with all the operating overall performance and manage strategies for centrifugal compressors in PEM fuel cell systems. This research presents the architectural guidelines of any little high-speed centrifugal compressor for PEM energy cells, as well as the main factors affecting the overall performance of compressors are talked about. The overall performance of any compressor is evaluated by the CFD method. Which is confirmed by the ways of experiment. The final results of this paper can be the references for the R&D of little higher-speed centrifugal compressors.