The micro-emulsification diesel oil with water dopant of 5%, 10% and 15% was prepared using the NAA micro-emulsification compound developed by the authors. The engine bench testing was carried out on the 485QB diesel ...The micro-emulsification diesel oil with water dopant of 5%, 10% and 15% was prepared using the NAA micro-emulsification compound developed by the authors. The engine bench testing was carried out on the 485QB diesel engine. From the testing results of velocity, loading and exhaust gas, it can be seen that the power decreases and the fuel consumption increases using the micro-emulsification diesel oil. But based on the actual fuel consumption, the use of emulsification diesel with water dopant of 10% can get the effect of oil saving; while with water donant of more than 15% , it doesnt work evidently. The investigation shows that using the micro - emulsification diesel oil, we can reduce the exhaust gas pollution and receive better environment benefit.展开更多
A thimble zirconia oxygen sensor electrolyte and their interface were observed with was prepared with YSZ. The surfaces of the Pt electrode, a scanning electron microscope （SEM）.The sensor was examined with engine b...A thimble zirconia oxygen sensor electrolyte and their interface were observed with was prepared with YSZ. The surfaces of the Pt electrode, a scanning electron microscope （SEM）.The sensor was examined with engine bench test to evaluate the essential performance. The basic function such as electromotive force output and response time was discussed. The oscillograph trace was also obtained and analyzed with four different frequencies. The experimental results reveal that the oxygen sensor has high performances meeting the demands of practical applications..展开更多
As one of the important ways to utilize hydrogen energy,fuel cells are receiving more and more attention and research from countries and institutions.To meet the practical needs of testing the performance of high-powe...As one of the important ways to utilize hydrogen energy,fuel cells are receiving more and more attention and research from countries and institutions.To meet the practical needs of testing the performance of high-power fuel-cell systems and simulate the actual application environment as much as possible,a fuel-cell system test bench is usually used to test the system performance,in which the cooling-temperature control of the test bench has a great impact on the results of the performance of the fuel-cell system.This paper studies the cooling-temperature control strategy of a 150-kW-class fuel-cell engine test platform,proposes a new test-bench cooling-system structure with a thermostat and heat exchanger as the main heat-dissipation components,and compares and analyzes the impact of coordinated thermostat and heat-exchanger control on the fuel-cell system test performance.The test results show that the control strategy of the coordinated operation of a thermostat and heat exchanger can maintain the steady-state error to within±0.3℃and maintain the temperature variation to within±1.5℃during the loading-condition test,so as to avoid the limitation of system output performance due to excessive cooling-temperature fluctuation and ensure that the fuel-cell engine performance-test process is carried out smoothly and efficiently.展开更多
文摘The micro-emulsification diesel oil with water dopant of 5%, 10% and 15% was prepared using the NAA micro-emulsification compound developed by the authors. The engine bench testing was carried out on the 485QB diesel engine. From the testing results of velocity, loading and exhaust gas, it can be seen that the power decreases and the fuel consumption increases using the micro-emulsification diesel oil. But based on the actual fuel consumption, the use of emulsification diesel with water dopant of 10% can get the effect of oil saving; while with water donant of more than 15% , it doesnt work evidently. The investigation shows that using the micro - emulsification diesel oil, we can reduce the exhaust gas pollution and receive better environment benefit.
文摘A thimble zirconia oxygen sensor electrolyte and their interface were observed with was prepared with YSZ. The surfaces of the Pt electrode, a scanning electron microscope （SEM）.The sensor was examined with engine bench test to evaluate the essential performance. The basic function such as electromotive force output and response time was discussed. The oscillograph trace was also obtained and analyzed with four different frequencies. The experimental results reveal that the oxygen sensor has high performances meeting the demands of practical applications..
文摘As one of the important ways to utilize hydrogen energy,fuel cells are receiving more and more attention and research from countries and institutions.To meet the practical needs of testing the performance of high-power fuel-cell systems and simulate the actual application environment as much as possible,a fuel-cell system test bench is usually used to test the system performance,in which the cooling-temperature control of the test bench has a great impact on the results of the performance of the fuel-cell system.This paper studies the cooling-temperature control strategy of a 150-kW-class fuel-cell engine test platform,proposes a new test-bench cooling-system structure with a thermostat and heat exchanger as the main heat-dissipation components,and compares and analyzes the impact of coordinated thermostat and heat-exchanger control on the fuel-cell system test performance.The test results show that the control strategy of the coordinated operation of a thermostat and heat exchanger can maintain the steady-state error to within±0.3℃and maintain the temperature variation to within±1.5℃during the loading-condition test,so as to avoid the limitation of system output performance due to excessive cooling-temperature fluctuation and ensure that the fuel-cell engine performance-test process is carried out smoothly and efficiently.
