Design And Construction Of A Rechargeable Standing Fan

1.0 INTRODUCTION
The electric fan was one of the most important electric inventions of all time. The fan is a building block of other more advanced technologies. Fans are necessary in computers, lasers, large LED lights, petrol and electric automobiles, the space station and countless other things. The fan as used in this work allows humans to build giant or underground buildings. It would be hard to imagine a world without the electric fan!
The electric fan has blades similar to a water or steam turbine. A DC drives a rotating shaft. Sizes of fans have gotten much smaller and lighter over the years. As engineers improved the electric motor and blade design they figured out how to get more performance out of a design that uses less copper and steel.
Rechargeable standing fan can help maintain humidity levels, protect various rooms of your house from stagnant air, and even help you sleep better at night. And that’s just the beginning. The blades force air either in or out of the room you’re trying to cool or ventilate.

1.1 BACKGROUND OF THE PROJECT
Nigeria has two climatic seasons which are dry and wet season. The dry period is usually from November to March while the wet season is from April to October every year. One of the challenges associated with the dry season is thermal discomfort which can lead to increase sweating and dehydration as the relative humidity becomes low during this period owing to increase evaporation. At night, heat waves build up in homes owing to convection current. This has an adverse health impact on humans resulting from raised body temperature such as dehydration, heat cramps, heat oedema (swelling), heat synlope (fainting), heat rash, cardiovascular and respiratory diseases, amongst others (Wiley 2012).
The electric fan helps to reduce these adverse health impacts caused by heat waves by getting air to people occupying a building, office, residential complex, shops or public places. However, the problem of erratic power supply that has bedevilled the country for several decades has further aggravated health challenges caused by heat waves (source). There is however a Global clamour for alternative sources of energy or renewable energy. This would in no small way help militate against the challenge posed by erratic power supplies as more homes would have access to clean and cheap energy to tackle the menace of heat waves. The underlying challenge is that fans found in homes or public places are AC powered. It therefore becomes imperative to develop and fabricate an electric fan that is DC powered.
An electric fan is a machine used to create a flow within a fluid, typically a gas such as air (Cory, 2010). Electric fan gives personal thermal comfort as it is difficult to sleep comfortably in a hot weather without it. The fan known as the “Punkah” in India was first used in early 500BC (Moggyland, 2010). Schulyer Wheeler was however adjudged to have invented the first electric fan produced from two unshielded blades, powered by an electric motor and housed in a protective cage using the principle of home cooling (Finolex, 2012).
A typical electric fan is made up of blades, hub, motor, switch, guard, mount and a power cord and works on the principle of electromagnetic induction. Fans produce flows with high volume and low pressure. It circulates the air and provides the pressure required to push it. Missouri (2010) observed that the most important design consideration of an electric fan is that it must impact to the air stream a uniform velocity and pressure over its entire area. According to Wiley (2012), fans do not cool the ambient air but draw cooler air from outside especially when placed in an open space.
As earlier highlighted, to meet the yearning demand of renewable energy, there is therefore the need to develop an electric fan that is DC powered. In this work, a DC powered electric fan has been developed with the aid of a DC motor. The fan works on the principle of electromagnetic induction with the coil situated in the DC motor induced by the application of a direct current. The electric current from a DC source is connected to the motor’s electric terminals which feed electric power into the commutator through a pair of loose connector called brushes (Sinclair, 2000). The DC battery used for this work is a 12V lead acid batter which is rechargeable.

1.2 AIM/OBJECTIVE OF THE PROJECT
The aim of the work is to design and construct rechargeable standing fan which is powered by rechargeable battery when there is power outage.
At the end of this work the student involved shall be able to build a rechargeable standing fan. The project involves using mains power supply to recharge power standing fan. Rechargeable standing fan, charges with mains power supply, then the charged battery is used to run the fan when there is power outage.

1.3 SIGNIFICANCE OF THE PROJCET
After knowing in detail what a rechargeable standing fan is and how different useful it is to make appliances work at residential and industrial levels students should also know the advantages.
• Also use of rechargeable battery energy helps in saving money many people have started using solar based devices
• Rechargeable standing fan helps people who use limited amount of electricity.
• A rechargeable standing fan is more environmentally friendly.
• Though initially the installation may be costlier, in the long term it would turn out to be cheaper because it does not use power from the utility grid and may provide savings up to 30 percent on air conditioning costs.
• A cordless appliance offers much more mobility compared to conventional fanssolar standing fans are the best way and they are better than the normal electric ones. Also their maintenance does not cost much money

1.3 LIMITATION OF THE PROJECT
• Initially you need to shell out a lot of money for buying a battery and fan.
• It will work effectively and produce direct current only when the battery is fully charge.

1.4 APPLICATION OF THE PROJECT
1. Cool Down your Room (and yourself)
Perfect for more moderate climates, electric fans are a very inexpensive way to cool almost any room in your home. They can also be quite refreshing, as they circulate cool air throughout the room.
Portable air circulators are some of the best options for this type of use, as they are easy to move from room to room. Be sure to pay attention to the size of the room you want to cool, as some kinds work better in large rooms than others.
2. Deal with smokers
Whether you’re dealing with a small kitchen mishap or your cigar-smoke, an electric fan can be a savior. Use your pedestal or table fan to suck up the smoky air and blow it out an open window or door. Pointed in the right direction, it can act as an exhaust.
Once the room is cleared, turn it around to blow fresh air back into the room. You don’t even need smoke in the house for this trick – it works for any room that needs ventilating.
3. Sleep easier
It can be especially difficult to sleep on a warm summer night. Typically, you have to choose between the noisy air conditioner or the uncomfortable heat. A bedroom fan can be a great alternative, as it operates much quieter than an air conditioning unit and it significantly lowers room temperature.
In addition, the cool breeze can be relaxing while you try to fall asleep. Pedestal fans are usually the best type for the bedroom and the variety of remote controlled options available make these a great addition to your home. Ceiling fans are perfect for moderate bedroom cooling too, and installed over the bed, they’re quite effective.
4. Keep humidity in check
An electric air circulator can do more than just cool. Because they ventilate the room, maintaining proper humidty levels is easy. Too much humidity can damage your home. Blowing fresh air into the room can keep the humidity levels down in your home and keep indoor areas well-ventilated. The constant circulation of air helps keep the air in your home clean as well as dry. It’s a win-win all the way around.
5. Protect your bathroom
Keep bathroom moisture levels in check with an exhaust fan. Installing an exhaust fan in the bathroom protects the interior and keeps it looking new. It also helps keep paint from peeling, doors from warping and mold from accumulating on bathroom surfaces too.
The added circulation keeps the air dryer, and helps remove bathroom moisture generated from a hot shower. These bathroom exhaust fans help control bathroom odors and room stuffiness too.
6. Accentuate your room
A solar fan can be so much more than a functional appliance; it can also add decorative charm to your living environment. Decorative fans come in a variety of shapes and sizes and accentuate just about any room in your home. The color variety can certainly add a refreshing change of pace from the traditional models. Best of all, they work just as well as standard fans.

1.5 ADVANTAGESOF THE PROJECT
i. Smaller size; fans may add some height but may reduce width and depth
ii. Potentially better low-load efficiencies

1.6 PROBLEM OF THE PROJECT
i. Increased complexity and maintenance
ii. Increased cost as fan packages may cost more than just adding material in smaller units
iii. Additional energy losses and noise when fan motors are operated in higher loads.

1.7 BENEFITS OF THE PROJECT
Using a rechargeable fan has lots of benefits like:
1. Rechargeable fan makes room windy and breezy.
2. Rechargeable fan can improve the décor of the rooms while delivering reliable and efficient performance.
3. Rechargeable fan are cheaper as an initial investment than an ac fan. The power consumption of a rechargeable fan is also significantly lower than an ac fan which will reduce your power bills.
4. In case of power cut rechargeable fan can be very easily used with a regular battery backup as compared to an AC fan.
5. Rechargeable fan can act as a backup in case the there is a break down in the ac fan.
6. In countries like some part of Nigeria like sokoto state, Pests, flies and mosquitoes is a problem every family deals with. Rechargeable fan can help to get rid of such insects and pests.
7. Rechargeable fan has a huge variety to choose from compared to any other cooling appliance.

1.8 PROJECT WORK ORGANISATION
The various stages involved in the development of this project have been properly put into five chapters to enhance comprehensive and concise reading. In this project thesis, the project is organized sequentially as follows:
Chapter one of this work is on the introduction to this study. In this chapter, the background of a rechargeable standing fan with remote, significance of a rechargeable standing fan with remote, scope of a rechargeable standing fan with remote, objective of a rechargeable standing fan with remote, the need (benefit) of a rechargeable standing fan with remote, limitation and problem of a rechargeable standing fan with remote, advantages of a rechargeable standing fan with remote was discussed.
Chapter two is on literature review of a rechargeable standing fan with remote. In this chapter, all the literature pertaining to this work was reviewed.
Chapter three is on design methodology. In this chapter all the method involved during the design and construction were discussed.
Chapter four is on testing analysis. All testing that result accurate functionality was analyzed.
Chapter five is on conclusion, recommendation and references.