The characteristics and use of solar energy

These notes will be used to generate and answer questions throughout the unit and help them study for the end of unit test on energy. Some examples include radiant, thermal, electrical, and chemical. The Earth is too far away from the Sun for thermal energy, but the light or radiant energy causes thermal energy on Earth, which we feel as heat.

The characteristics and use of solar energy

Such temperatures are too low for efficient conversion to electricity. The efficiency of heat engines increases with the temperature of the heat source.

The practical effect of high efficiencies is to reduce the plant's collector size and total land use per unit power generated, reducing the environmental impacts of a power plant as well as its expense.

As the temperature increases, different forms of conversion become practical. Higher temperatures are problematic because different materials and techniques are needed. High temperatures also make heat storage more efficient, because more watt-hours are stored per unit of fluid. Commercial concentrating solar thermal power CSP plants were first developed in the s.

The principal advantage of CSP is the ability to efficiently add thermal storage, allowing the dispatching of electricity over up to a hour period.

With current technology, storage of heat is much cheaper and more efficient than storage of electricity. In this way, the CSP plant can produce electricity day and night. Reliability can further be improved by installing a back-up combustion system.

The back-up system can use most of the CSP plant, which decreases the cost of the back-up system. CSP facilities utilize high electrical conductivity materials, such as copperin field power cablesgrounding networks, and motors for tracking and pumping fluids, as well as in the main generator and high voltage transformers.

Copper in concentrating solar thermal power facilities. With reliability, unused desert, no pollution, and no fuel costs, the obstacles for large deployment for CSP are cost, aesthetics, land use and similar factors for the necessary connecting high tension lines.

Although only a small percentage of the desert is necessary to meet global electricity demand, still a large area must be covered with mirrors or lenses to obtain a significant amount of energy.

An important way to decrease cost is the use of a simple design. When considering land use impacts associated with the exploration and extraction through to transportation and conversion of fossil fuelswhich are used for most of our electrical power, utility-scale solar power compares as one of the most land-efficient energy resources available: In the Bureau of Land Management approved nine large-scale solar projects, with a total generating capacity of 3, megawatts, representing approximately 40, acres.

Quantifying the benefits of state and local energy policies. Learn about methods and tools analysts can use to quantify and compare the many benefits of energy efficiency and renewable energy policies and programs.. Visit our updated guide». Solar energy, radiation from the Sun capable of producing heat, causing chemical reactions, or generating total amount of solar energy incident on Earth is vastly in excess of the world’s current and anticipated energy requirements. Passive solar design takes advantage of a building’s site, climate, and materials to minimize energy use. A well-designed passive solar home first reduces heating and cooling loads through energy-efficiency strategies and then meets those reduced loads in whole or part with solar energy.

In contrast, inthe Bureau of Land Management processed more than 5, applications gas and oil leases, and issued 1, leases, for a total of 3. For low concentration systems and low temperatures tracking can be avoided or limited to a few positions per year if nonimaging optics are used.

The characteristics and use of solar energy

Therefore, it seems unavoidable that there needs to be a tracking system that follows the position of the sun for solar photovoltaic a solar tracker is only optional.

The tracking system increases the cost and complexity. With this in mind, different designs can be distinguished in how they concentrate the light and track the position of the sun.Solar thermal energy (STE) is a form of energy and a technology for harnessing solar energy to generate thermal energy or electrical energy for use in industry, and .

Kenya is faced with a rising demand in electricity resulting from a rapidly growing economy and an increasing population.

Being a tropical country, lying astride the equator, solar energy is one of the readily available renewable energy resource options to meet this need.

Is Solar the right solution for your needs?

Solar Power Home. The sun's radiaton delivers energy in abundance. Yet, technologies to harness that energy have been costly. However, with costs coming down and attractive incentives in many countries, solar provides great opportunities for developers, investors and consumers.

Solar energy is radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar heating, photovoltaics, solar thermal energy, solar architecture, molten salt power plants and artificial photosynthesis..

It is an important source of renewable energy and its technologies are broadly characterized as either passive solar or active solar depending on.

Solar energy depend on sunlight, so cloudy days don't generate as much power..

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Solar energy is only collected during daylight, so evening power needs to be stored in batteri es and in other ways.. Solar panels are expensive, but . Drilling Down in MAISY Databases.

MAISY databases are developed specifically to support energy use and energy-related analysis of user-specified, detailed customer segments (e.g., households in single family dwelling units with incomes less than $25,, small office buildings with electric space heating built before , and so on).

International Institute for Asian Studies