Solar thermal power generation -

Also known as focusing type solar thermal power generation (Concentrating Solar Power, CSP for short), by way of a large number of mirrors to focus solar direct light together, heating medium, high temperature and high pressure steam, steam driven turbine to generate electricity.

Overview

Using solar energy for more than 3,000 years of human history, but using solar energy as a source of energy and power, but less than 400 years of history. 　　Since the early 17th century in accordance with development and application status of solar energy utilization, development of solar energy utilization in the modern world generally is divided into 8 stages. Solar energy utilization in modern history, from 1615 France engineer Solomon, Tak · Cox invented the world's first solar powered water pump starting; 1901-1920 world solar energy at this stage the focus of the study, still is a solar power plant. But used of concentrated way diversification, and began used flat type set hot Manager and low boiling point workers quality; 1921-1945 years due to fossil fuel of large mining application and the outbreak has second times World War of effect, this stage solar uses of research development is low, participate in research work of number and research project and the research funds significantly reduced; 1946-1965 years this a stage, solar uses of research began recovery, strengthened has solar theory and based material of research, With substantial progress in all aspects of the solar energy 1966-1973, since solar energy technology is not yet mature at this stage, is still in its development phase, work world solar energy stagnation, slow development; 1973-1980 this period of the outbreak of war in the Middle East led to a Western country “ &rdquo the oil crisis, and making an increasing number of countries and people of insight to realize that, the current energy structure has to change, Should accelerate the transition to a new energy architecture, objectively, this stage was unprecedented during the great development of solar energy utilization; 1981-1991 years as world oil prices to decline significantly, and solar energy products prices, lack of competitiveness, solar energy utilization technology without major breakthrough; since 1992 is the eighth stage, in June 1992, the United Nations “ World Conference on environment and development ” in Brazil after the, Countries around the world to strengthen the research and development of clean energy technologies, the development and utilization of solar energy out of the trough, more and more attention to and strengthening of the State.

Concentrated type solar thermal power generation

Solar thermal power generation is usually called concentrating solar power, unlike the traditional power stations are, they are obtained through gather solar radiation heat thermal energy converted into high temperature steam to drive steam turbines to generate electricity. 　　Current solar thermal power generation by solar collection can be divided into (1) solar trough power; (2) solar thermal power Tower, (3) thermal power solar dish. Slot type system is uses throwing real column surface slot type reflection mirror will Sun focused to tube shaped of receives Manager Shang, and will tube of heat transfer workers quality heating produced steam, promote General turbine power; Tower type system is uses many of day mirror, will Sun hot radiation reflection to placed high tower Department of high temperature set hot Manager (Sun boiler) Shang, heating workers quality produced overheating steam, or directly heating set hot Manager in the of water produced overheating steam, driven turbine power unit power; disc type system uses surfaces concentrated reflection mirror, will incident Sun gathered in focus Department, Directly placed at the focus of Stirling engine generation. 　　These three types of solar thermal power generation technology has its own characteristics, strengths and weaknesses, some of which are listed in table 2-1. Table 2-13 development of concentrating solar power plants and their advantages and disadvantages

In these three systems, only trough power generation system to achieve commercialization. In the 10 years from 1981 to 1991, one after another in United States is being built in the Mojave Desert of California 9 trough solar thermal power station, an installed capacity of 353.8MW (a minimum installed capacity of 14MW, one of the biggest installed capacity of 80MW), with a total investment of us $ 1 billion, annual amount of 800 million KWh. As with other solar energy technologies solar thermal power generation technology, continuous improvement and development, but their degree of commercialization has not yet reached levels of water heaters and photovoltaic power generation. Immediately prior to the commercialization of solar thermal power generation is in, experts expect by 2020, solar thermal power generation to commercialization in developed countries, and gradually extended to developing countries.