The power p which causes the water to rise in the cylinder is p=Q/t=cmΔt/t=(4.2*10 to the third power × 0.6×1)/(2×60)= 21w
The radiant power p′ reaching the area 3×10-2m2 of the upper layer of the earth's atmosphere is p`=ptotal×p/η=p×4лR cube/s=4.4 ×10de21 power w
Solar street lights power How to calculate
Solar panel power calculation method
1. First, calculate the number of watt hours consumed each day (including power loss). inverter): If the inverter conversion has 90% efficiency, then when the output power is 100W, the actual output power required should be 100W/90% = 111W if used for 5 hours per day, power consumption is 111 W*5; hours = 555Wh.
2. Second, calculate the solar panel: based on the effective daily sunshine duration of 6 hours, and taking into account the efficiency of the charge and loss during the charging process, the output power of the solar panel should be 555Wh/ 6h/70%=130W. 70% of this energy corresponds to the actual power used by the solar panel during charging.
The power of solar street lights is determined based on the output power of the solar panel. A solar panel is a device that converts solar energy into electrical energy. It is made up of several solar cells. The output power of each solar cell is generally between 0.5 watts and 5 watts.
The formula for calculating the power of solar street lights is: power = output power of solar panels × number of solar panels.
First, the output power of the solar panel must be determined. This can be obtained by looking at the information on the specifications or label of the solar panel. Generally speaking, the puiThe output voltage of the solar panels will be clearly displayed on the label.
Second, the number of solar panels must be determined. The power of solar street lights is directly proportional to the number of solar panels, so the number of solar panels should be determined according to the actual situation. Generally speaking, the greater the power of solar street lights, the number of solar panels increases accordingly.
Finally, the power of the solar street light can be obtained by substituting the output power and the quantity of the solar panels into the power calculation formula.
It should be noted that the power of solar street lights is not the biggest, the best, but should be determined according to the actual use environment and needs. Too much power may result in wasted energy, and too little power may not meet lighting needs.Therefore, when choosing solar street lights, you should consider the actual situation and choose the appropriate power.