The tilt angle of the small scale existing solar power plants is 60 degree and it is 45 degree for the megawatts(MW)class solar power plant in Mongolia.However,the PV module which is installed with 45 degree accumulat...The tilt angle of the small scale existing solar power plants is 60 degree and it is 45 degree for the megawatts(MW)class solar power plant in Mongolia.However,the PV module which is installed with 45 degree accumulates lots of snow during the winter.Currently,all solar PV systems installed in Mongolia are fixed the direction and tilt angles.According to the previous research result,the tilt angle of those systems was not suitable for using especially in the winter.The PV module which is installed with 60 degree does not accumulates snow even during the autumn and spring.According to the National Aeronautics and Space Administration(NASA)solar radiation database,solar irradiance for equator facing is largest at 32-degree tilted angle during the summer,47-degree during the spring and autumn,at 62-degree during the winter.The results of this paper show,the tilt angle of the PV module should be adjusted at least twice a year.For instance,the tilt angle will be adjusted at the 32-degree from 15th March to 24th August,at the 62-degree from 25th August to 15th March.In this case,the annual total energy output will be increased up to 30%than present production.展开更多
Photovoltaic(PV)system’s performance is significantly affected by its orientation and tilt angle.Experimental investigation(indoor and outdoor)has been carried out to trace the variation in PV performance and electri...Photovoltaic(PV)system’s performance is significantly affected by its orientation and tilt angle.Experimental investigation(indoor and outdoor)has been carried out to trace the variation in PV performance and electrical parameters at varying tilt angles in Malaysian conditions.There were two experimental modus:1)varying module tilt under constant irradiation level,2)varying irradiation intensity at the optimum tilt set up.For the former scheme,the irradiation level was maintained at 750 W/m^(2),and for the later arrangement,the module tilt angle was varied from 0 o to 80 o by means of a single-axis tracker.Results show that under constant irradiation of 750 W/m^(2),every 5 o increase in tilt angle causes a power drop of 2.09 W at indoor and 3.45 W at outdoor.In contrast,for the same condition,efficiency decreases by 0.54%for indoor case and by 0.76%at outdoor.On the other hand,for every 100 W/m^(2)increase in irradiation,solar cell temperature rises by 7.52℃at indoor and by 5.67℃at outdoor.As of module electrical parameters,open-circuit voltage,short-circuit current,maximum power point voltage and maximum power point current drops substantially with increasing tilt angle,whereas fill factor drops rather gradually.Outdoor experimental investigation confirms that the optimum tilt angle at Malaysian conditions is 15 o and orienting a PV module this angle will maximize the sun’s energy captured and thereby enhance its performance.展开更多
文摘The tilt angle of the small scale existing solar power plants is 60 degree and it is 45 degree for the megawatts(MW)class solar power plant in Mongolia.However,the PV module which is installed with 45 degree accumulates lots of snow during the winter.Currently,all solar PV systems installed in Mongolia are fixed the direction and tilt angles.According to the previous research result,the tilt angle of those systems was not suitable for using especially in the winter.The PV module which is installed with 60 degree does not accumulates snow even during the autumn and spring.According to the National Aeronautics and Space Administration(NASA)solar radiation database,solar irradiance for equator facing is largest at 32-degree tilted angle during the summer,47-degree during the spring and autumn,at 62-degree during the winter.The results of this paper show,the tilt angle of the PV module should be adjusted at least twice a year.For instance,the tilt angle will be adjusted at the 32-degree from 15th March to 24th August,at the 62-degree from 25th August to 15th March.In this case,the annual total energy output will be increased up to 30%than present production.
基金The authors would like to acknowledge the financial support from University of Malaya,Impact Oriented Interdisciplinary Research Grant(Project:IIRG015B-2019)to carry out this research.
文摘Photovoltaic(PV)system’s performance is significantly affected by its orientation and tilt angle.Experimental investigation(indoor and outdoor)has been carried out to trace the variation in PV performance and electrical parameters at varying tilt angles in Malaysian conditions.There were two experimental modus:1)varying module tilt under constant irradiation level,2)varying irradiation intensity at the optimum tilt set up.For the former scheme,the irradiation level was maintained at 750 W/m^(2),and for the later arrangement,the module tilt angle was varied from 0 o to 80 o by means of a single-axis tracker.Results show that under constant irradiation of 750 W/m^(2),every 5 o increase in tilt angle causes a power drop of 2.09 W at indoor and 3.45 W at outdoor.In contrast,for the same condition,efficiency decreases by 0.54%for indoor case and by 0.76%at outdoor.On the other hand,for every 100 W/m^(2)increase in irradiation,solar cell temperature rises by 7.52℃at indoor and by 5.67℃at outdoor.As of module electrical parameters,open-circuit voltage,short-circuit current,maximum power point voltage and maximum power point current drops substantially with increasing tilt angle,whereas fill factor drops rather gradually.Outdoor experimental investigation confirms that the optimum tilt angle at Malaysian conditions is 15 o and orienting a PV module this angle will maximize the sun’s energy captured and thereby enhance its performance.
