Assessment of the environmental impact of Electric Vehicles Essay

Assessment of the environmental impact of Electric Vehicles - Essay Example Source: Shim et al, 2009, Electric car-Tesla Roadstar Structure and Layout of the two vehicle systems In an electric engine the numbers of components is fewer in number and are simpler in configuration. If one were to trace back the line of components starting from the tyres, the wheel axle connected to the tyres is driven by a motor. Similar to controlling speeds by regulating the quantity of fuel, the accelerator controls the voltage input into the motor which thereby controls the speed of the vehicle. The whole setup is powered by a battery and which can be charged from an external power source by simply plugging on to it. (Markel Tony, 2007) Compared to the IC engine which had power sources taken from the same shaft drive it is essential that power for operating the air conditioner and water pump are taken from individual separate motors. The battery should be connected to the motor using a controller so that large starting torques is avoided. (Electric and Plug-in Hybrid Vehicle s, 2010) This can also bring a certain amount of automation in the working of the motor in regulating speed and bringing forth forward or backward motion. It also protects the motors from being subjected to high loads. A number of batteries are arranged in two slots and must be capable of generating 300V DC. (Basic Electric Car Engine Overview, 1999) The Internal combustion on the other hand has a number of components that are required for its efficient working. A four stroke combustion cycle in an Internal Combustion engine follows the Otto Cycle. (Basic Electric Car Engine Overview, 1999) The combustion and the power thus generated takes place in an enclosed space. This cycle has four strokes which namely are 1. Intake stroke- As the piston contained in the engine begins its downward stroke, the inlet valve opens admitting fresh air that has been mixed with gasoline in a certain ratio, into the system. 2. Compression- The cylinder moves up and compresses the air thereby increasing both its density and temperature. 3. Combustion – A spark plug located at the top introduces a spark into this charged mixture. The leads to the downward motion of the piston creating the power stroke. 4. Exhaust- The piston moves back upward thereby expelling the burnt gases outside providing space for fresh intake. Electric vehicles and aerodynamics It is true that the number of components of an electric car is lower than a traditional car and the profile of the electric car can be readily modified to increase its aerodynamic efficiency. However a point of concern is the weight of the batteries that would otherwise increase drag and lower aerodynamic efficiency. By installing an effective nose grille at the front of the car, the air that remains stagnated in the frontal region of the car around the motor and gearbox is rerouted to flow past these areas and thereby reduce drag. The La Chevrolet Malibu has shutters in the lower grille region that are controlled electronicall y and automatically. (Industry, Research and Energy, 2010) As the speed of the vehicle increases the shutters close to allow the air at high speeds to flow past the vehicle. This reduces drag and also gives an impetus to the aerodynamic quality of the vehicle. Fuel efficiency is also increased. (Markel Tony, 2007) In the Honda Civic which has a Hybrid variant has aerodynamic hubcaps that are fixed to the rear end spoilers. This has lead to a reduction of aerodynamic drag from 0.3 to 0.27. The overall effect of

Explain the Significance of the Four Marks of the Church - One, Holy, Essay

Explain the Significance of the Four Marks of the Church - One, Holy, Catholic and Apostolic - Essay Example Through the guidance of the Holy Spirit, the Church has continued to fulfill the marks, and only faith can recognize that the Church received these manifestations from God. The â€Å"One† mark of the Church shows that the Church of the apostles was one. Paul wrote that there is only one body and spirit in (Eph. 4:4-5), and he linked the unity to the Church’s common Eucharistic bread in (1 Cor. 10:17). The Bible says that the Church is the bride of Christ (Eph. 5:23-32) and has only one source. Jesus also promised from the outset in (John 10:16) that there would be one flock, and one shepherd. The Catechism also notes that the Church is one with three reasons namely; first, source of the Church is Holy Trinity, which is a the great unity of three heavenly persons; Father, Son, and the Holy Spirit; the second being the founder of the Church, Jesus Christ, who came to reunite through the blood in the cross for all mankind; and the third, â€Å"soul,† the Holy Spirit that is in the souls of the faithful, unites all the faithful into one communion of believers, and guides the Church. The â€Å"oneness† of the Church is visible in Catholics who are united in their Creed and other teachings, the sacramental celebrations, and the hierarchical arrangement that are based on the apostolic succession that are handed and preserved through the Sacrament of Holy Orders (Brian 2008). The Body of Christ Himself is the Church, and so is whole one, and one as Christ’s Body is whole one. The Church of Christ teaches only one set of doctrines that are taught by the apostles (Jude 3). The unity in the belief in which the Scripture calls all to adhere to (Phil. 1:27, 2:2). The Christian Church is united in faith, worship, and succession from the apostles themselves. The unity manifestation is hard to clutch today with centuries of old divisions and the existence of many Christian denominations spread across the world. Mass is conducted in the same w ay all over the world in terms of prayers, readings, structure, and everything except in difference of language by Catholics who have the same belief, and are offered by a priest who is united by his bishop who is united by the holy Father, the pope. Although, some dissent from official doctrines, the Church understands them (John 16:12-13) and it does not misunderstand them to mean contrary to want they meant before. Diversity is found in the oneness, in that the faithful has different vocations and different gifts, although they work together to continue with the mission of the Lord. The different cultures and traditions enrich the Church in their expressions of faith. Charity must saturate through the Church, for members to continue being together in unity. Example of the Catechism of the Catholic Church states that; The Church is one that recognizes one Lord, which confesses one faith, the Church born of one Baptism; it forms only one Body, given life by one Spirit, for the sake of one hope, at whose fulfillment all divisions will be overcome. Churches of all denominations have continued to emphasize the fundamental unity showing that there is only one faith, one Lord and One God. â€Å"Holy† as a mark of Church signifies the Church of the apostles as the Lord Himself as the source of all holiness. This shows that all things that the church has from the all-holy God himself and everything are holy. However,