Zhongyuan solar energy street light case studies

Performance requirements: LED solar street light. Lamp high 5, 24 v input voltage, power is 50 w, work 8 h a day. Ensure to provide lighting for rainy days 3 days. Try to design LED solar street light. 1 solar cells choose the annual average sunshine in the central plains

performance requirements: led solar street light. Lamp high 5, 24 v input voltage, power is 50 w, work 8 hours a day. To ensure that the lighting for three consecutive rainy days. Try to design led solar street light. 1 solar cells select annual average sunshine time is 4 in the central plains. h。 Street lamp power consumption: ( 50/24) * 8 = 16. 67 ( Ah) Battery charging current always: ( 16. 67 * 1 05) / ( 4 * 0 85) = 5. 15 ( A) 0. 05 is a combination of solar energy battery components system loss coefficient, 0. 85 is the battery charging efficiency. Solar battery pile of total power test 5. 15 * 34. 8 = 179. 22 ( West) Choose two pieces of Pm = 90 w solar panels in parallel. The best working voltage is 34. 8 volts, the best working current is 3. 88 2. Battery to choose battery capacity: 16. 67 * ( 3 + 1) = 33. 34 ( Ah) Choose 24 v - 40 ah maintenance-free lead-acid batteries. 3. The controller select intelligent controller. According to the requirement of the zhengzhou street lamp system, adjust the overall traffic signal controller parameters of the controller, protect street lamp battery, etc. 4. Reference data: solar cell Angle 35. 730 + 70 = 42. 750 solar cell stack direction is south to west, and the horizon into 42. An Angle of 750 degrees. 5. The wind resistant design for light according to the conditions of construction area, street lamp system assembly and design light pole wind resistance.