Objectives: Solar DC fan for street vendors: Make survey of product available in market and design solar operated DC fan system in affordable cost for street vendors, shopkeeper
Project description: Solar fan composed of DC fan, solar panel, regulated circuit or charge controller and there may also be a battery . The DC fan directly operates on solar panel. This solar fan is useful for street vendors, shopkeeper.
Steps: i) First I make survey of DC fan which is available in market. From this survey I get it the cost of dc fan is high because of battery.
Lovely Solar Fan DC 12Volt – 24Watt 12″ SanChi Table Fan
Operate on DC 12 Volt, 50Watts Solar Panel/ 7AH Battery/ 3 Ampere
Lovely Solar Fan DC 12Volt – 20Watt, 12″ A-One Table Fan (Double Speed, Red & Grey)
1. Operate on only DC 12 Volt – Solar Panel/Battery/Adapter (not on Electricity), Use minimum 50Watts Solar Panel/ 7AH Battery/ 3 Ampere Adapter | Product Specification:- Brand – Lovely Solar Fan | Model – A-One Table | Power – 20 Watt | Current – 1.3 – 1.8 Amp. | Voltage – DC 12 Volt
BalRama 12 Volt DC/15 Watt/1.4 Amp/6 Inch Auto Rotate + On/Off Switch + Wiring Set Portable Electric Oscillating Fan for Car, Auto, Caravan, Boat, Truck, Buses, Vehicle, Truck, Automobile Cooling Fan Clip On Fan Steel Metal Body Oscillating Automotive 6” Car Interior Fan (12 V)
ii) I design a solar system for 12v, 1A dc fan. a) Determine power consumption demands Power= Voltage * Current = 12 * 1= 12W Total appliance use = (12 W x 6 hours) = 72W-hr Total PV panels energy needed= 72 * 1.3 ( the energy lost in the system) = 93.6 W/day b) Size the PV panel Total Wp of PV panel capacity needed = 93.6/ 5 = 18.72 Wp Number of PV panels needed = 18.72 / 20 = 0.936 Actual requirement = 1panel So this system should be powered by at least 1 panel of 20 Wp PV panel. c) Charge controller PV module specification Pm = 20 Wp Vm = 18 V, I = 1.1A Solar charge controller rating = (1 strings x 1.1 A) x 1.3 = 1.43 A So the solar charge controller should be rated 2 A at 12 V or greater.
iii) After that I take a REMI fan which is available in Ashram. It required 12V, 1A power.
iv) So I connected the fan directly to the 20 W solar panel but this fan does not continuously run so I require regulated power supply.
v) So I made regulated circuit by using capacitor 2200uF and Ic 7815. Take trials connecting before the fan.
a) In our campus 3 REMI fan available. But it is not working so I repair 2 out off 3 fans. Now it working good.
b) 5 fans is not in used because absence of suitable adapter