Ioan Aurel CHERECHEȘ


35-61 ASPECTE PRIVIND UTILIZAREA ENERGIEI SOLARE Partea I

ASPECTS ON THE USE OF SOLAR ENERGY – Part I

Most human activities, the size, volume and quality of goods and services available to mankind are energy dependent, with energy playing a central role in human existence, being the most important resource. At present, fossil fuel carriers are the fuel of the world economy, and humanity is geared towards using abundant energy at a relatively low price. Alternative sources such as sun, wind, hydropower, wave energy, geothermal energy, bioenergy etc. it is practically not consumed, calling it renewable (alternative or unconventional sources). They produce far fewer emissions, reduce chemical, thermal, and radioactive pollution, and are available theoretically anywhere in the world. The sun is a real blessing, giving us in an hour – enough energy for all people to use it for one year. Every day, about 120,000 terawatts (TW) of electrical power is offered to us by the sun. That, while over a year, the world uses only 15 TW of energy. The paper analyzes some aspects regarding the use of solar energy: collectors, solar power stations, solar houses.

Keywords: solar energy, types of renewable energy, history, heat fluxes, energy radiation, solar collector, nuclear energy Cuvinte cheie: energie solară, tipuri de energii regenerabile, istoric, fluxuri termice, radiaţii energetice, colector solar, energie nucleară

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35-62 ASPECTE PRIVIND UTILIZAREA ENERGIEI SOLARE Partea a II-a

ASPECTS ON THE USE OF SOLAR ENERGY – Part II

Most human activities, the size, volume and quality of goods and services available to mankind are energy dependent, with energy playing a central role in human existence, being the most important resource. At present, fossil fuel carriers are the fuel of the world economy, and humanity is geared towards using abundant energy at a relatively low price. Alternative sources such as sun, wind, hydropower, wave energy, geothermal energy, bioenergy etc. it is practically not consumed, calling it renewable (alternative or unconventional sources). They produce far fewer emissions, reduce chemical, thermal, and radioactive pollution, and are available theoretically anywhere in the world. The sun is a real blessing, giving us in an hour – enough energy for all people to use it for one year. Every day, about 120,000 terawatts (TW) of electrical power is offered to us by the sun. That, while over a year, the world uses only 15 TW of energy. The paper analyzes some aspects regarding the use of solar energy: collectors, solar power stations, solar houses.

Keywords: solar energy, types of renewable energy, history, heat fluxes, energy radiation, solar collector, nuclear energy Cuvinte cheie: energie solară, tipuri de energii regenerabile, istoric, fluxuri termice, radiaţii energetice, colector solar, energie nucleară

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35-63 CONSIDERAȚII ASUPRA ENERGIILOR REGENERABILE – ENERGIA SOLARĂ

CONSIDERATIONS ON RENEWABLE ENERGY – SOLAR ENERGY

This paper briefly describes the main renewable energies on our planet. It also describes the solar energy used for the preparation of hot water and the heating of homes. Last but not least, the transformation of solar energy into electricity required for home appliances in a home such as telephones, lighting, television, etc.

Keywords: solar energy, electricity, hot water, solar panel Cuvinte cheie: energie solară, energie electrică, apă caldă, panou solar

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35-72 UNELE CONSIDERAȚII PRIVIND ACOPERIRILE METALICE ELECTROCHIMICE ȘI CHIMICE

SOME CONSIDERATIONS ON ELECTROCHEMICAL AND CHEMICAL METAL COVERINGS

This paper briefly presents electrochemical and chemical metallic coatings. Coatings of various parts with metallic layers is done especially for: Increasing the corrosion resistance, improving the appearance, increasing the superficial hardness, increasing the resistance to wear. Metallic coatings can be made: electrochemically, thermally, by spraying, chemically, by plating, amalgamation, by conversion, and by vacuum evaporation.

Keywords: metallic coatings, electrochemical coatings, chemical composition, nickel electrolytes, copper electrolytes Cuvinte cheie: acoperiri metalice, acoperiri electrochimice, compoziție chimică, electroliți de nichelare, electroliți de cuprare

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