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3rd Thermal and Fluids Engineering Conference (TFEC)

ISSN: 2379-1748

METHODS OF ENERGY EFFICIENCY IN COMPRESSED AIR, REFRIGERATION SYSTEMS AND THEIR FINANCIAL IMPACTS

Anderson Reis
Federal University of Pará (Brazil)

DOI: 10.1615/TFEC2018.ens.021552
pages 667-674


KEY WORDS: Energy, Efficiency , Industry, Engineering, Economy, Refrigeration, Compressed air, Air conditioning

Abstract

Energy efficiency, especially electric power, has become a goal since the oil shocks of the 1970s when it became clear that fossil reserves would not be cheap forever and their use causes damage to the environment. Another problem is for the year 2035 we need to produce 49% more energy than we currently produce. It was soon discovered that the same "energy service" (lighting, driving force and use that provides heating, environmental conditioning, electro-electronic equipment, etc.) could be provided with less energy expenditure, with repercussions economic, environmental, social and cultural. However, we can make great strides to overcome this challenge through methods to improve the energy efficiency of systems. Low cost and high return measurements can be applied as, for refrigeration, elaborate freezing curve identifying where the highest concentration of thermal load is located to adjust the production to avoid peak times where electricity is more expensive. For compressed air where 80% of the energy used to compress the air is converted into heat, this energy in the form of heat is often wasted for no purpose, however, this energy can be completely reused. These and other energy-saving opportunities generate great financial result. In practice, it has been shown that large energy saving rates are perfectly reachable. Making a financial analysis is notorious that one of the great benefits of energy efficiency is the positive influence on a country's economy.

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