Xem 1-20 trên 32 kết quả Air motor
  • The Trane indoor make-up air handler product line is a packaged air, heating and cooling system, suitable for heating, cooling, ventilating and make-up air applications. These units are designed for indoor use only. Unit sizes range from 900 to 9,800 cfm (0.4-4.6 cu m/s) with 1/2 to 15 hp motor capabilities. These units are available with inputs from 100,000 Btu/h to 1,200,000 Btu/h (29.3 to 351.4 kW). Duct furnaces are AGA and CGA certified for safety and performance with a range of 100,000 Btu/h input to 400,000 Btu/h (29.3 to 117.1 kW) input per duct furnace.

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  • Lead-acid starter batteries are used in land, sea, and air vehicles. Batteries for vehicles are discussed in this chapter. The production of starter batteries approaches 60 million pieces. About 16 million pieces are used for motor vehicle production and about 38 million pieces keep the vehicles ready for operation as back-up batteries. A considerable number of imported and exported pieces play a part in this market. With these numbers Europe achieves about two-thirds of the U.S. production. ...

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  • Source: HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONS SECTION 9 AIR AND GAS COMPRESSORS AND VACUUM SYSTEMS Estimating the Cost of Air Leaks in Compressed-Air Systems 9.1 Selecting an Air Motor for a Known Application 9.4 Air-Compressor Cooling-System Choice for Maximum Coolant Economy 9.10 Economics of Air-Compressor Inlet Location 9.14 Power Input Required by Centrifugal Compressor 9.16 Compressor Selection for CompressedAir Systems 9.18 Sizing Compressed-Air System Components 9.24 Compressed-Air Receiver Size and Pump-Up Time 9.26 Vacuum-System Pump-Down Time 9.

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  • AIR AND GAS COMPRESSORS AND VACUUM SYSTEMS Estimating the Cost of Air Leaks in Compressed-Air Systems 9.1 Selecting an Air Motor for a Known Application 9.4 Air-Compressor Cooling-System Choice for Maximum Coolant Economy 9.10 Economics of Air-Compressor Inlet Location 9.14 Power Input Required by Centrifugal Compressor 9.16 Compressor Selection for CompressedAir Systems 9.18 Sizing Compressed-Air System Components 9.24 Compressed-Air Receiver Size and Pump-Up Time 9.26 Vacuum-System Pump-Down Time...

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  • Since the introduction of the first industrial robot UNIMATE in a General Motors automobile factory in New Jersey in 1961, robots have gained stronger and stronger foothold in the industry. In the meantime, robotics research has been expanding from fix based robots to mobile robots at a stunning pace. There have been significant milestones that are worth noting in recent decades.

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  • A fiber rope consits of strands made up of from fiber yarns twisted and layed into rope form. A strand is made by twisting yarns and a rope is made by twisting trands.

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  • The forces and moments the vehicle receives from the surrounding air depend more on the shape of the body than on the characteristics of the chassis. A detailed study of motor vehicle aerodynamics is thus beyond the scope of a book dealing with the automotive chassis. However, aerodynamic forces and moments have a large influence on the longitudinal performance of the vehicle, its handling and even its comfort, so it is not possible to neglect them altogether.

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  • Since the introduction of the first industrial robot UNIMATE in a General Motors automobile factory in New Jersey in 1961, robots have gained stronger and stronger foothold in the industry. In the meantime, robotics research has been expanding from fix based robots to mobile robots at a stunning pace. There have been significant milestones that are worth noting in recent decades. Examples are the octopus-like Tentacle Arm developed by Marvin Minsky in 1968, the Stanford Cart crossing a chair-filled room without human assistance in 1979, and most recently, humanoid robots developed by Honda....

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  • The usual approach of epidemiological studies is to measure the association between at least one specific pollutant (e.g. PM, NOx, CO or O3) and health outcomes. These specific components are usually highly correlated with other pollutants and are considered indicative of the complex pollutant mixture. It is unclear how much the associations reported in epidemiological studies represent the independent effects of specific pollutants.

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  • In addition to affecting air quality and natural environmental degradation, transportation can also play a key role in the degradation of urban environments. The delays and frustrations caused by urban traffic congestion can reduce human productivity and quality of life, thus possibly reducing the potential gross domestic or gross regional product. The noise produced by various types of motor vehicles, as well as the excessive use of horns–a fact of life in cities in many developing countries–raises the level of ambient noise, increases stress and reduces the quality of life.

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  • We are experiencing rapid growth rate of urbanization, motorization and industrialization. Our overwhelming dependence on fossil fuel to drive our daily life and economic activities has led to releasing of various green house gases and air pollutants into the atmosphere resulting in degrading of the quality of air in the urban areas and global problem of climate change. Degrading of the quality of air in the urban areas has put at risk the lives of millions of people under direct threat due to health impacts associated with air pollution.

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  • Almost all motorized transportation today involves the combustion of fossil fuels, which produces energy to be transformed into motion. This combustion is the reaction of the hydrogen and carbon present in the fuels with oxygen in the air to produce–in the ideal world–water vapour (H2O) and carbon dioxide (CO2). Neither of these products is damaging to human health.

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  • Many of the costs associated with motor vehicle use, for instance, are external. Examples include the costs of congestion, and noise, water and air pollution. If users had to pay the full cost of road transport, including external costs, they might choose different forms of transport or decide to travel less. Economic assessments of policy options must consider all costs and benefits of a proposal, including ‘external’ effects, such as air emissions. Failure to do so could mean that costs or benefits are significantly underestimated and the analysis is biased.

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  • Benzene is a colourless, liquid, flammable, aromatic hydrocarbon that is a component of petrol, or may result from incomplete combustion of fuels. Benzene, a natural component of crude oil, is emitted from a range of industrial and combustion sources. The major source of benzene is motor vehicles—both vehicle exhaust (contributing approximately 75% to 80% of emissions) and evaporative emissions (including evaporation losses from motor vehicles and evaporation losses during the handling, distribution and storage of petrol).

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  • Primary pollutants are those in which the substance emitted is itself hazardous. Some primary pollutants also produce other dangerous substances after undergoing chemical reactions in the atmosphere, and these are known as secondary pollutants. Primary pollutants include the following substances. Particulates This includes dust, smoke, aerosols and haze - any finely divided airborne solid material.

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  • Field data are being integrated into well-developed and tested models to better understand and characterize aerosol pollution in Mexico City. The spatial, temporal, size, and chemical characteristics of specific emissions sources are needed to allow their contributions to PM concentrations to be distinguished from each other and to provide accurate inputs to air quality models.

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  • For instance, in developing countries in particular, we would expect those in urban areas to utilize cars, motor cycles and buses to a greater extent than those in rural areas. Similarly, agricultural products are transported to the cities, often from places far away—see Parikh and Shukla (1995) who provide an early analysis of the effect of urbanization on energy use and greenhouse gas emissions in developing countries. We agree with O’Neill and Chen (2002, p.

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  • Operation of the ultrasonic transducers is based on the echo-sounding principle. Short ultrasonic pulses are sent out by the ultrasonic transducer, reflected from objects in the vicinity and received again by the ultrasonic transducer. The ultrasonic transducer sends the period of time required between sending the ultrasonic pulse and receiving the first echo to the PDC unit which, in turn, calculates the distance to the nearest object from this period of time. Ultrasonic waves propagate at different speeds in gases, liquids and solids.

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  • Mechatronics is an interdisciplinary branch of mechanical engineering, electrical engineering and software engineering that is concerned with integrating electrical and mechanical engineering to create hybrid systems. In this way, machines can be automated through the use of electric motors, servo-mechanisms, and other electrical systems in conjunction with special software. A common example of a mechatronics system is a CD-ROM drive. Mechanical systems open and close the drive, spin the CD and move the laser, while an optical system reads the data on the CD and converts it to bits.

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  • Discussion Questions & Answers: Cf: F & O (2005) and F, O, & F (2002) Q1. Why should a tax on gasoline provide a larger incentive to reduce air emissions from motor vehicles than an annual tax on owning a vehicle? Answer: The answer depends upon the magnitude of the fuel tax relative to the vehicle tax. A fuel tax targets the three components of emission reduction (i.e. a) number of vehicles on the road; b) miles per vehicle; and c) emissions per mile). On the other hand, an annual tax affects only the marginal decisions to put a car...

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