Tag Archive | "efficiency"

Quantum Dot or Nano Crystalline Solar Cells

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Quantum dot solar cells are basically nano crystalline cells. These cells used a thin layer of nano materials over the substrate. The substrate is usually made of silicon.

Efficiency of Quantum dot Solar cells

These cells are much more efficient than any other kind of cells. They can produce enormous energy from just a single photon of light. Photons are the packets of light. They can be considered as building blocks just like atom is the building block of matter.

Prediction of National Renewable energy laboratory 2005

In 2005 researchers and scientists predicted about the extra ordinary capabilities of this emerging technology. They also claimed to be able to achieve an efficiency of 65% with quantum dot or nano crystalline solar cells.

Formation of Nano crystalline or Quantum dot Solar cells

The formation of these solar cells includes following steps.

  • A silicon substrate is required first of all.
  • The silicon substrate can be obtained in any way through ingots or something else.
  • The cells are not totally made of nano material.
  • A thin coating of nano material has to be done over the substrate.

Spin coating

Recently, new and more advanced methods of developing nano crystalline or quantum dot solar cells have been established. Spin coating is the most important among these.

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Mono Crystalline Solar Cells

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Mono crystalline solar cells are the earliest form of solar cells. With the growing demand of energy in the world, the concept of renewable energy has attracted the attention of not only the scientists and researchers but also the consumers and common people.

How are mono crystalline solar cells formed?

There are several steps involved in their production and formation. But the basic outline of the procedure involves the following steps.

  • Cylindrical ingots of silicon are used for the preparation of these solar cells.
  • Ingots are long rectangular or oblong blocks of silicon.
  • Thin wafers are cut out of these oblong blocks of silicon.
  • The process of sawing is used the most frequently for cutting of the wafers.
  • Great care has to be taken since the wafers are extremely thin and the dimensions have to be very accurate.
  • Another important thing which is required is a rigid glass substrate.
  • The wafers of silicon are then deposited on the glass substrate.

Appearance of Mono crystalline Solar cells

These cells appear to be polka dotted. They have gaps at all corners of the cell this shape gives them a unique appearance. Among all kinds of solar cells, these cells are the most easy to recognize.

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Interesting Facts About Solar Power

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When it comes to buy a thing, you can try it after buying it and even post a review about it on internet for others. However, when it comes to transferring to Renewable power sources, most probably Solar power, one simply cannot go and try after buying it. It’s understood that transfer to renewable energy requires a lot of investment.

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Probably you already have read enough advantages of Renewable energies as well as how you can get your money back on investment. So, lets just keep this thing to some interesting facts about Solar Power because understanding some facts about Solar power will certainly help you in deciding whether to make that huge investment on Solar power or not.

Demand Of Solar Power Is Increasing By 25% Every Year!

No wonders Solar Power demand is increasing at this rate since it is the ecological renewable source of energy.

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Types And Advantages Of Solar Heating Systems

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Now you can power your house with green energy. It may sound expensive or difficult to convert normal home into sun-inspired home. But in fact, it is fairly simple and economical. These have countless benefits. Being environment-friendly, these are safer and not harmful for the atmosphere around.

Two methods of solar heating are “active” and “passive”.

Active solar heating

Specific equipment is required for active solar heating. Pumps and fans are needed to move or direct sun heat. There are two further classifications in it, which are air-based and liquid systems.

1.Air-based solar heating

In air-based solar heating systems, collectors are used. These trap air which absorbs and transfers heat from the sun. Air-based system can work on lower efficiency than liquid ones. Why is that so? The reason is that air cannot transfer heat efficiently like water can do.

Advantages of air-based solar heating

There is an advantage of air-based solar heating that these systems can warm up room directly. These can also function early in the morning and late in the day. Moreover, these are easy to build and install. These can be fixed outside so that more than one room in a house can be heated.

Air-based connectors are mostly installed on window frames, roofs and walls.

2.Liquid-based active solar heating

Liquid solar collectors are used in liquid-based systems. These trap and move heat. Most common are flat-plate collectors. A fluid, like water or antifreeze is filled. This liquid absorbs heat. This heated fluid is then transferred to heat exchanger or storage tank through mechanical collector such as pump.

Important considerations

While installing solar heating system, consider these important things first:

  • Its cost is affordable
  • Size is suitable to your particular needs
  • It is durable and long-lasting
  • Tank placement is absolutely accurate

When entire mechanism is properly installed, solar heat can be distributed with a central-forced air system, a radiant floor, and a baseboard or hot water radiator.

Passive solar heating

Another type is Passive solar heating system. It works by storing solar energy. It does not require any electrical or mechanical devices.

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Review Of SunPower Solar Systems

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The quest for renewable energy sources has continued through out the history. The pace further picked up during the last decade and now the companies are investing huge amounts in research and development of alternate energy sources. The capacity of solar power has been taken note of by the world community and efforts are being made to harness it. SunPower Solar Systems is one of the companies that joined the race to develop solar energy for domestic users.

History Of SunPower Solar Systems

SunPower Solar is a company with its manufacturing done at Philippines. It is a public sector company with its headquarters located at San Jose, California. The company aims at reducing the initial cost of installing the solar energy systems for the domestic users.

Technology Of SunPower Solar

SunPower Solar specializes in manufacture of solar panels and high quality photovoltaic cells. The company also produces good quality roof tiles which are capable for using the solar energy in optimum manner.

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Important Things about Solar Trackers

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Solar power energy is serving for a variety of purposes. In the past few years, more forms of solar power energy have become popular among green people. These consumers also directed towards ways by which they can keep the track of the performance and efficiency of their solar power system. One of the most popular ways to become more efficient when operating a solar power program is to utilize a tracking base. Following are the few important things about running a photovoltaic system:

Advantages of Tracking

Advantages of Tracking

You can enhance the energy production with the tracking because tracking-arrays get more sun power when it is at its peak. This allows the installation of a smaller array and reduces the required array footprint that is beneficial for sites that do not have much space available. Tracking array can also be beneficial for the kits with wide open solar access. The sun power that is received during early morning and late hours can be sufficient, especially during low summer times during which at most northern latitudes, the rise in the northeastern region and sets in the northwestern region.

Appropriate Applications of Tracking Array

Surplus power is only advantageous in the case when can easily sell it or store it for future use. In this case, a utility connected system with wide open sun window can be very beneficial option for a tracked array. It is because every kilowatt-hour will be utilized. Read the full story

Costs of Photovoltaic Cells

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Photovoltaic Cells are used in the solar power panels to produce electricity. The energy which is generated from the PV Cells is cheap and very powerful. PV Cells have completely changed and redirected the efforts of several experts who are dedicatedly working towards finding better means of power generation. Solar energy is very popular and many people use it. However, the costs associated with its implementation are high and stressful.

Solar Power Panels – PV Cells

Solar Power Panels – PV Cells

Many people completely decide to make a shift towards solar power. Despite any decision that people make, they are not able to completely movie towards solar energy. The solar power panels are expensive and contractors charge the people who install them on a regular basis. Many people often find their life savings to be invested in a solar power system. This aspect of solar power makes it unpopular among people as its initial costs are high.

The Upfront Costs

The up-front costs which are associated with Solar Power are of mediocre value. Many people find these costs to be affording and ultimately decide to give in the payment. Read the full story

Passive Solar Technique: Solar Direct Gain

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Solar energy systems are considered as the best alternative to the traditional ones. Solar energy is being converted into other forms of energy pretty successfully now-a-days. This is one of the most reliable and efficient thing to do. You are not required to spend a lot of money on fuel anymore. All you need is sunlight.

Applications of solar energy

Applications of solar energy

Solar energy is available all over the world, and you do not have to pay for it unlike other sources of energy. The function and efficiency of the devices that run on solar energy depends upon the amount of sunlight they are subjected to for the entire day. Lighting and heating are two of the most significant applications of solar energy systems.

Passive solar gain

If you are interested in getting a solar energy system for your house, you are recommended to get quality parts like solar panel, battery, etc. When it comes to heating, direct gain is the simplest technique regarding passive solar gain. You must be aware of the fact that the passive solar heating does not require too much maintenance. In fact this sort of heating needs the minimum amount of maintenance as compared to other techniques.

Active solar gain

On the other hand, the active solar heating totally relies on the mechanical devices for the transfer and distribution of heat, which makes it obligatory for the person to maintain the components well. Read the full story

Steps To Make Solar Power Generator

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Are you interested in making a solar generator within a budget of 350 USD? Then you have to follow the following instructions. The cost of the solar generator entirely depends upon the material that you use while construction. The solar generator will generate up to 100 watt-hour of electrical energy if the solar panel of 20 watt receives solar energy for more than five hours per day.

Important components of generator

Important components of generator

In this particular design that you are going to learn, we are going to use a rechargeable battery that can store more than 400 watt of energy.  First you have to pick a reliable solar panel that is rated at 12 volts. You can easily get such solar panel for less than 175 USD. You are suggested to get a charge controller of 4 amperes, which is readily available for 25USD. Battery is the most important factor of this design. Therefore, you should get a 32 amp-hour battery that is available for 60 USD.

Power inverter and installment of components

You can attain power inverters for less than 30USD. Next you are recommended to grab a voltage meter that is going to be used to monitor the load on solar generator. A wooden box or a plastic cooler are suggested to be used for the enclosing purposes. You have to drill a spot on the cooler to fit in the parts that are being discussed before.

Precise connections

The next step includes the connection of the insulated wires with the battery from the meter. Keep in mind that you have to connect the positive terminal first. Read the full story

Mostly Preferred Solar lighting

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These days world is searching for cheap energy sources, solar energy in among one of them. Advancement has come in the solar lighting technology and in the last few years this has developed its reliability widely. With the passage of time its usage in the public has increased and has developed its reliability in user circle.

Awareness

AwarenessAs the people are becoming more aware environment related issues, so they are trying to use to the products that are environment friendly. Thus the use of solar lighting has increased because it is environment friendly. The solar lights are available in all types of sizes, shapes and colors.

Applications of solar lights

There are many applications for these lights. Few of them are stated below

  • Street lights are used for illuminating roads, streets, parking lots.
  • Grow lights can be used in greenhouse operations without affecting your power bills.
  • For outdoor parties and dinners garden lights can be used.
  • Sign lights can be used for advertisement purpose and the companies will prefer this source because it is reliable source.
  • Security lights are use in an area having issues relating power and it is required when a reliable and cheap power source is needed.

Components of solar lighting effective in its working

To get a better idea of this technology you have to understand various components that are involved in the operation.

  • Run time – The run time depends upon all the components of the solar lighting system. The quality of these components mainly affects the run time.
  • Circuitry – This is the most important component of the solar lighting system. If the wiring is not done properly it will affect the efficiency.

LED

Now days in most of the solar lighting system LEDs are used. LED stands for light emitting diode. Read the full story

Residential Solar Panel Setup

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Most solar homes are constructed using the same basic building principals of solar homes. However, two solar homes are not necessarily exactly he same. There are certain elements that are necessary for increasing the efficiency of solar home, resourcefulness and utility so they can be called “solar homes”. Following are these important elements.

Orientation of Solar Homes

Orientation of Solar Homes

Orientation of solar homes is very important because sun is the empowering and guiding force behind all the setup of solar panels, so solar homes must be built in a style in which the can face and receive sufficient sunlight. It simple means that all the rooms that need frequent inhabitation must be located on the south side, so hey can absorb a considerable amount of sun heat.

Shading of Solar Homes

Shading of solar homes also holds great importance. Shading protects home during cozy temperatures. It is important for solar homes to have shading during the scorching summer times. Shading is required to be manifested in skylight coverings, window coverings, landscaping and trees. Read the full story