Science Horizons

Learn how solar energy is generated and discover hidden secrets of gaining from this powerful energy source.

How do we get solar energy and what exactly is this?

Solar energy, as the name itself suggests, is derived from the sun and is sourced from the radiant energy that is emitted by the sun. Solar energy thus obtained is transformed into various other useful forms of energy such as electricity, heat, light, mechanical and chemical power, and used for a most diverse range of purposes. The radiant energy is emitted through the rays of the sun which are primarily made up of radioactive waves. Of the entire amount of sun’s energy incumbent on the earth’s surface, the upper layers of the planet usually absorb around 70% of it through the various water bodies, landmasses and the atmosphere, while the rest is reflected back into space. Solar energy is an important alternative source of power for today’s world and is finding wider acceptance everywhere with every passing day. In this respect, it is of much importance to learn about all the pros and cons of solar energy.

What are the plusses and minuses of solar energy?

Solar energy applications are multiplying rapidly as it is being used in an increasing number of areas. Apart from the widespread domestic use of solar power, it is also being used extensively in various other fields such as agriculture, architecture, urban planning, solar lighting, solar thermal, solar chemical, solar vehicles, cooking and so on. Based on the application of solar power, it can be broadly divided into two classes – active solar power and passive solar power. The former stresses the use of solar panels and photovoltaic cells to capture and convert the sun’s energy into various forms of energy, while the latter is more concerned about reducing the dependence on active solar power and instead, directly use sunlight by citing buildings optimally to the sun, designing well-lit and well-illuminated spaces in the buildings and so on. Let’s face it, solar energy has become inseparably intertwined with our lives. However, much remains unknown about this wonderful source of power.

The advantages of using solar energy are far many than the handful of disadvantages that it might have. The sun, which is a gigantic storehouse of energy, can act as an excellent alternative source of energy. Modern science and technology has made it possible for us to tap into this vast resource and harness the sun’s energy to put it to various uses. Solar energy is for free, and once one has invested in setting up the system, there’s no recurring cost. As long as the sun shines, one can keep enjoying its energy for free without entailing high costs or endangering the environment. As the concern over gradually diminishing natural resources continues to grow, alternative sources of energy are being looked into with renewed enthusiasm. Moreover, this environment-friendly and ‘green’ source of energy is a boon to our already heavily polluted environment. Solar power has the ability to produce electricity at remote locations, for example, the satellite in the space is catered by high efficiency photovoltaic or solar cells that are not connected to any grid. This also supports installation of solar cells in rural or remote areas which is actually more economic than the usual high voltage wire installation. Recent advancements in solar power technology has made it possible to generate appreciable amounts of power even when the sun is not shining very brightly. What’s more, the energy produced during the day allows itself to be stored for use at night.

How to gain from solar energy?

Let’s take a look at some of the disadvantages of using solar power. The most serious complaint against its use is the high cost associated with it. Solar panels and other related equipment are usually quite expensive. Even the cheapest of solar power generators would easily cost one no less than a grand. Another problem of using solar power is the fact that most solar systems are not yet capable of generating sufficient amounts of electricity under less than optimal circumstances. In other words, a steady supply of bright sunlight for a fairly long stretch of time is something that is absolutely required by most solar systems today to be of any real use to us. Moreover, their performance can get seriously affected by the presence of pollutants in the air. In fact, few solar power systems today are able to give 100% output because of this reason. This is also the reason why installing a solar power generator at a remote locality usually makes better sense as it yields more output than in the city where the level of pollution is higher.

Solar power is really a great choice for reasons both financial as well as environmental. That is why so many people are enthusiastically considering installing a system in their homes. The best thing is that you can too. But for that you need to know where to put it up, how to install and wire it, where to get the parts and the batteries from and also the safety regulations that have to be followed. A step-by-step guide in this respect can be really helpful. You should seriously consider getting hold of one such good guide before you take the plunge into the wonderful world of solar power.

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Find out all that you wanted to know about solar energy heating system and discover the mechanism and advantages of using it.

Solar energy heating system: Meaning and significance

The rays of sunlight produce radiant energy. When this radiant energy is transformed into several other energy forms, it is called solar energy. When this solar energy is tapped, processed in order to convert it to generated heat (i.e. thermal power), the technique is called solar thermal energy. Several alternative purposes, like heating water, cooling the space, warming up the space as well as production of process heat, are served by the use of solar energy heating units. To raise the temperature of water, solar collectors are used in these solar heating cells. The modern, up-to-date techniques that are used ensure that these systems function at high levels of efficiency as well as deliver top-quality output. Since these solar heating systems are sophisticated and use the latest technology, they can even help users effectively get back a significant portion of their initial investments on the system.

Mechanism of working of a solar energy heating system

Flat plate collectors that are glazed and evacuated tube collectors form the principal components of a solar energy heating system that is meant to raise the temperature of water. These water heating systems are mainly used in domestic homes. However, in order to heat up water at swimming pools, plastic collectors that are unglazed are used. Methods of solar concentration are applied for process heating in industries and for other commercial purposes. Greater amount of solar energy is generated by larger number of solar collectors. In general, batteries, an inverter, as well as solar collectors (two or three) form the chief parts of any solar energy heating system. The radiant energy generated by the sun are captured and collected by the solar collector components. DC electrical power is generated from the solar energy, after the latter is captured and processed. Silicon is widely used as the semiconductor element that is used in a solar collector. As soon as the DC electric power is generated, it is directed to the inverter present. The latter transforms DC electric power to usable AC electric current, which, then, can be put to practical usage. The solar power heating systems that do not have the inverter are generally not desirably quick in delivering output. Often, the amount of functional electrical energy generated from the captured solar power is significantly more than what is immediately required by the end users. This is where the batteries come in handy. The excess electrical energy generated is stored in the batteries, so that this electricity can be used at a future date. If there still remains a significant amount of extra electrical power, it can be sold off to the owner of the company. Hence, users can also avail of a way to save money.

A charge controller is generally provided the batteries. It ensures that the batteries, and in turn, the entire solar power unit, keeps on functioning in the most efficient manner possible. Certain hardware, cables and testers are necessary for setting up the unit, and making the batteries work. Hence, these are also provided in a solar energy heating system, in addition to the main components of the latter. However, these solar energy systems might not be able to meet the entire power requirements of a home; nor is it compatible with the various electrical devices in a house. Still, for a practical demonstration of the actual working mechanism of a solar power generator, these units are ideal.

Advisability of using a solar heating system: A health perspective

There are a whole lot of advantages that can be enjoyed only if solar energy heating systems are used. Even if the surrounding air is rather cool, you can remain comfortable, provided adequate amounts of solar energy are available. Keeping the air temperature on the lower side also prevent electric bills from running too high. Other systems of heating often result in the spreading of dust particles, pet dander, viruses, dirt and different bacterial organisms all around a home, particularly during winter. Solar heating systems that use radiant energy do not cause any such harmful side effects, thereby keeping various potential diseases at bay. The solar power units also help in the human breathing tracts retaining adequate moisture, so that infections might not occur. There are no disturbing noises produced by the systems, since they do not have separate blowers. Economy of space is also guaranteed, since the solar heating systems do not require any major overhaul of the internal furniture of a house. Financial benefits from these solar power heating systems are much greater too, particularly when compared to traditional baseboard heating units or forced hot air systems. The solar power systems need not be kept outside the reach of kids either. Currently, a lot of organizations are coming into business, with each of them stating that their technology is indeed the best. The batteries of the system store excess energy, which can be used at night. Hence, the entire system need not work at night to keep a home comfortable. If you are able to get an insight into these systems, you are sure to wish to want such a unit. Usage of solar energy heating systems ensures that forthcoming generations get to enjoy a cleaner atmosphere. Hence, it is highly recommended that you should make use of these systems to meet your power requirements.

You should ideally consult a guide to get to know of the tremendous economic and ecology-related advantages that a solar energy heating system has to offer. Power can also be effectively saved and sold for money, by using these systems. A training manual would help you learn the steps for installing the system, the place where it should be set up for optimum results, and how to get free batteries as well as relatively affordable other components of the system. The requisite safety measures as well as the wiring techniques are also made clear. Get such a guide, and install your solar energy heating system, quickly and easily.

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Discover the crucial facts about solar power systems before going off grid!

Most people now are aware of the benefits of solar power systems, which can generate electricity from the rays of the sun. This widespread awareness is undoubtedly, mainly because of the ever-increasing popularity of these systems in all parts of the US, as well as in various other nations. Hence, an understanding of how these systems function should be an interesting study. The process, in which the solar power systems can trap, store and process energy to produce electricity, as also their method of working on a cloudy day when there is no sun in the sky, would form the main focus of this discourse.

The rays of the sun comprises of photons. These photons are trapped by the silicon wafers of the solar power systems and converted into DC electrical current. Once this DC power is changed into usable forms of 120 volt AC electrical power, this renewable current source can be directly plugged on to an electrical grid, or the electrical setup of a building. However, the various intricate hazards as also their advantages and disadvantages are not known by most and this can be a problem. Thus, when a person chooses one particular company for the installation of the system at his/her home or office, (s)he must be cautious and be aware of all relevant data. Ideally, the past records of the company, as also the quality of work rendered before should be looked into.

Different factors have to be kept under consideration, when one selects a solar power system. Such important factors include: i). the add-on features that come with a grid-tied solar system, ii). Chief parts of the system, iii). Monitoring the progress of the system, iv). The main factors of success, v). The ways to operate and properly maintain the unit.

Solar power systems that are grid-tied: This kind of system has a lesser cost than the other types. A grid-tied solar energy system is ideal for the processing and production of electric current at all times of the day. Without a grid, the system can work only as long as sunlight is available. As soon as evening sets in, it comes to a stop, and this is hardly desirable. Battery backups can be opted for, but they are too expensive. In fact, grid-tied solar energy systems offer the best solution to this problem. Users can easily get the power they require at night from the electricity that gets stored on the grid during the day. And if there is something extra, then it can even be sold off. And this gives an opportunity to recover some of the investments made initially.

Chief components of solar power systems: At the core of the solar power systems are the solar or photovoltaic cells. Generally, a ‘module’ is created by assembling several of these cells. Once some of these modules are attached together, we can create a solar panel. The panel then needs to be installed at such sites that receive abundant sunlight during most parts of the day, such as on the rooftop. Even those who are not experts have frequently seen these solar panels, which are rather prominent anyway. Hence, the panels can be said to be the point of introduction of people to solar power systems.

There are a number of other components too, apart from the panels. For generation of 120 volt AC current that would have the requisite cycles and would be usable, an inverter is used, through which the DC electrical power is passed. Wires are also used to keep all the different components of these systems attached. Clamps and stands, which are non-conducting in nature, are used to keep the panel in the recommended position, while, for installing the systems on top of roofs, racks are used. Make all these available and you can be sure that the system will work just fine.

Monitoring via the web: This allows people to keep a close eye on the way of working of the solar power systems. This monitoring can be done using different portable gadgets as well. Several web browsers are also used for this purpose.

Main factors of success: These factors are known very well by all established solar system companies. The factors include the direction in which the system needs to be placed for generating the maximum power. A close eye also needs to be kept on the climate, so that electricity could be generated efficiently. For example, if the morning in San Francisco is foggy, it indicates that electricity can be ideally generated during the mid-afternoon hours of the day. TV sets and computers that do not have power constitute ‘phantom loads’, if they are kept connected to the systems. For efficient working of the solar power systems, these ‘phantom loads’ need to be removed. If all these factors are considered in detail, it will be easier to take such measures that would go on to improve the efficiency levels of these systems.

Proper way to maintain the solar power system: The solar power system needs to be kept clean, and this cleaning should be done once in a year at least. If batteries are also present, they need to be replaced at intervals of 5 to 10 years.

Solar power systems can offer great benefits, and you can enjoy all of them once you have set up the system. But you must know the steps to install the system, and where you should put it up to get the best results. You should consult a guide, which would have all this information, and would also help you know from where to get the batteries for free, as well as purchase the other parts at low price. You will also get informed about wiring the system and the necessary safety precautions. Follow the instructions in the guide, and install a solar power system, and you will surely get good results.

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Learn what the advantages of solar energy are and how can you build solar power system at your home.

Solar energy, as the name suggests, is derived from the sun (and not, the moon). The benefits of solar energy to mankind are manifold. Until recently, solar energy could be made use of only during the day. However, with the advent of new technologies, solar energy can now be tapped and used even during the night. Here, we will be looking at some of the major benefits of solar power.

While it has always been customary to depend on the sun for heat and warmth, generation of electricity even during the night provides an added advantage of solar energy. It is pollution-free and eco-friendly in nature, and as such, is one of the most recommended sources of energy. In case the solar energy package has a battery backup or is grid-tied, it can also store the electricity, which then can be used at night. The benefits of solar energy, however, go beyond these factors.

If some amounts of electricity generated in this process remain unutilized, it can be made saleable by moving them to the utility or the grid. No upfront payment is required for this transfer of surplus electric power, and some money can be made out of it. Running costs are extremely low on solar energy, helping the consumers drastically cut down on their expenses on electricity. With no movable parts, the solar panel itself does not have any other additional costs too. Thus, there are three major benefits of using solar energy for generating electricity: a) reducing the electric bills of consumers by large amounts, b) helping users earn some cash by selling surplus amounts of electricity, and c) the extremely eco-friendly nature of solar energy.

Solar power systems help in keeping the environmental balance of the world intact. Traditional fossil fuel based energy sources generally release gases like carbon dioxide (CO2), sulfur dioxide (SO2), methane and nitrous oxide (NO) into the air. These gases, termed as greenhouse gases, contribute to global warming. Solar energy avoids the usage and release of these gases. Hence, it remains eco-friendly, and does not bring with it the risks of global warming. The harmful smog or acid rain, generated by the fossil fuel sources, is also not an issue when solar energy is used.

The sunlight is a freely abundant and renewable raw material for the functioning of the solar panels. Other required accessories can also be easily obtained. Irritating noises, so often a feature of other energy sources, are absent in solar packages. Battery banks, converters and control panels form parts of solar panels. Power models can be switched from solar panels to battery-run sessions, via the controllers provided. The solar energy systems generally come with sturdy trailers. Hence, they are extremely convenient when geologists start to explore virgin lands in search of minerals and oil. Due to the manifold benefits of solar energy, the latter is gradually being put to different uses, and that too, at separate, far-off places in the world.

Fossil fuel reserves are going down rapidly all over the world. The oil prices are also increasing at a high rate. All these factors have made the existence of vehicles that rely on internal combustion engines a difficult task. Hence, these vehicles are gradually being replaced by hybrid cars in the market. Experiments are also on regarding the developments of such cars which would run solely on solar power. Indeed, in the near future, it is envisaged that solar power driven cars would completely take over from the fossil-fuel driven engines. The harmful carbon monoxide released by the internal combustion engines can also be avoided by using solar energy. This would boost the overall cleanliness of the atmosphere.

Over time, the cost of using photovoltaic cells is going down. Hence, the process of harnessing solar energy is becoming cheaper, so that it is gradually being used even in such areas where conventional energy sources had held sway over the past years. According to experts, vehicles that use internal combustion are on their way out, with solar-powered vehicles taking their place. This would definitely lift the purity of the air surrounding us. Thus, solar energy holds out significant advantages over other conventional energy sources. Indeed, it is on its way to become one of the chief sources of power worldwide.

In view of the manifold advantages of solar energy, you are well-advised to make use of this energy source. However, you will need to learn the proper techniques to install and use solar power systems, using training manuals and such guides. Doubts regarding the wiring of the solar energy plants, the place to install solar plants, and the way to acquire batteries and other components of the system also need to be clarified. Relevant safety measures also need to be imbibed in the system. Once an individual has adequate information, (s)he can easily install solar electric systems in his/her home.

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The whole concept of generating power has already been revolutionized by the fixed solar power engines. In comparison with fossil fuel power generators and conventional energy sources, solar power of course provides environmentally friendly, pollution-free transformation of solar radiation into renewable electricity today. The mobile or portable systems use the same photovoltaic technology to provide A.C. current anywhere that the sun shines. They are truly innovative because you can, as the name suggests, take portable solar power systems wherever you go. It is a big step in freeing ourselves from conventional power systems. It can even be said that these power systems are changing not only how we generate and use power, but also the world in general.

The possibilities for using portable solar system are limited only by our imagination. Whether it is a matter of a trip to the Amazon forest or an expedition to the desert, portable power systems bring creature comforts within reach at the end of each day. There is no longer any need to remain within connecting distance of the national electrical grid.

Convenience for the user as well as protection of the environment are both key characteristics of portable solar systems. They do not require fuel, pollute the air, need maintenance or make any noise. Large or small, they can be carried or transported using appropriate vehicles.

Portable solar power with storage batteries can therefore provide for all electrical requirements whether users are camping out in African game reserves or providing help to distant third world countries. Base camps can therefore be provided with all modern conveniences and information technology.

It is the solar systems that use portable photovoltaic technology and with backup batteries that come closest to replacing the conventional power grid. Their ability to make power available in remote areas surpasses that of the grid. They are typically maintenance “free and require little if any intervention. The panels that trap the suns rays and generate electricity cover the internal wiring, charge controllers and battery and inverters. The solar radiation is therefore easily and efficiently changed into 120 volts A.C. electricity simply by pushing a button whenever the sun is shining.

Three major components for portable solar power systems mean that the design is both simple and effective. The photovoltaic panels generate electricity from the sun, and then run this through a charge controller into battery storage, to finally have the inverter use the power from the batteries to provide one hundred and twenty volts A.C. current in standard sign waveform whenever required. The batteries also store any surplus current that is produced so this can be used later for example when the sun is not shining or at night.

The major advantage of portable power generators, especially the smaller ones, is that they can be transported in private vehicles such as SUVs and cars to private homes. And that includes RVs, boats or even residential construction sites where grid power has not yet been installed in. They are equally useful for powering farm pumps or kitchen appliances.

Portable solar power generators producing solar electricity use the same principles as their fixed type counterparts. In the same way, protons striking the solar cell panels as part of the sunlight become absorbed by the panels and provide the energy to generate electricity. The PV panels for portables act in the same way as the fixed versions.

Generators using conventional, fossil-fuel energy sources such as propane and diesel, may see their days being numbered. Solar powered generators are fast replacing these rapidly aging machines wherever the use of clean, renewable and zero-cost energy has been recognized as a significant advantage.

There are considerable financial benefits as well as environmental ones for solar power. Knowing how to install and wire such a system can be both easy and safe when you have access to the right information. A good manual will also tell you where to get batteries and other parts inexpensively, sometimes even for free. All of this will let you put your solar power system into action efficiently and securely, while respecting all required safety precautions.

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