Modern HVAC systems
Heating, ventilation and air conditioning (HVAC) help regulate the climate and maintaining indoor air quality of homes and commercial buildings. While sophisticated and reliable HVAC systems are in modern daily life together, do not always have distributed so far. However, the principles on which these systems operate in the long-known scientists and engineers. Even if progress in terms of reliability and cost efficiency of HVAC systems to further improveWe enjoy a very mature technology of this industry today.
The modern air conditioning system has been in constant development of their invention in 1902 by Willis Haviland Carrier was. The system was invented that carriers are used in a printing press to adjust the temperature and humidity, making the process used to work in a more consistent and reliable. Then it exploded the demand for commercial air conditioners and Carrier started his company. It 'wasNot until 1950, however, residential air conditioning was widespread.
Because many early air-conditioning systems use toxic and flammable gases, to generate cooling, its usefulness was limited, so that in 1228, Thomas Midgley, Jr., the first chlorofluorocarbons (CFCs) invented for use in systems refrigeration. This has been commonly known by the trade name of DuPont Freon, and greatly improves the safety and reliability of refrigeration and air conditioning. But in1970 scientific studies began to show that the release of CFCs into the air was to reduce levels of ozone in the stratosphere, which reaches a higher incidence of dangerous solar ultraviolet radiation on the Earth's surface. Because of the actions of the government have the use of CFCs and related chemicals have been limited and is expected to be completely dismantled until 2010. More recent non-ozone depleting refrigerants have been developed and are being phased in HVAC systemsthe market.
Our understanding of properly designed HVAC systems continued after the World Health Organization (WHO) has published a report in 1984, the Sick Building Syndrome (SBS). SBS has been found that lead from poor air quality and various solutions have been developed since then to prevent this condition from developing countries. Guidelines for HVAC systems properly maintained can help prevent SBS, in addition, the use of an air-air heat exchangers are used to increase theAmount of fresh outside air, which is housed in a building without sacrificing energy efficiency. The current recommendation of the American Society of Engineers Air Conditioning Heating, Refrigeration and Air is 8.4 air exchange within a period of 24 hours.
With energy costs put a research center under way to improve energy efficiency, HVAC systems. In an attempt to reduce the environmental impact of the design of new and existing buildings, the U.S. GreenBuilding Council promotes the respect of a series of guidelines known as Leadership in Energy and Environmental Design (Leeds). Energy-efficient HVAC systems are an important ingredient for a successful implementation of LEEDS standards.
Today we enjoy a safe, efficient and reliable air conditioning and ventilation technology. As part of our daily lives, these systems continue to be adapted to our needs of today's conclusion of scientists and engineers.
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