What has not been said of Electric Vehicles? A Google search of ?EV? results in 71,900,000 hits. Talk of hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), and all-electric vehicles (EV) have given society both hope and confusion.
Depending on what you read and hear, it?s highly questionable if EVs are truly gaining traction. If gaining traction means slowly nudging forward towards the industry?s overzealous market projections, then one could say the industry is growing. But overall, it is safe to say EV sales have been disappointing and well short of expectations.
Customers are caught between a rock and a hard place between the cost, range, and recharging time of EVs and the need to reduce greenhouse gas emissions and curb climate change, which is here and now and getting worse before our eyes. Yet, sometime in the future, in one form or another, EVs have to be successful. Our future depends on it.
Today, the lines are drawn between the technologists who developed the advanced battery technologies powering EVs, the environmentalist who look at EVs as a salvation to global warming and a cleaner environment, the marketers who see EVs as the next major paradigm shift and a huge market opportunity, and finally the consumers who a sit on the sidelines knowing that EVs pose many economic and unanswered questions.
Anyone, other than those in the O&G industry, would be foolish to support the ongoing use of fossil fuels in the transportation sector. Those against finding a cleaner and more economical solution are as illogical as a member of the NRA still supporting retail sales of assault weapons with +30 cartridge magazines.
One item needs to be cleared up, that is EVs claim of zero-emissions. In of themselves, battery powered vehicles do not emit pollutants. However, electrons flowing out of rechargeable batteries are generated at the utility level primarily from greenhouse emitting coal and natural gas, see following chart. So from a life cycle perspective, EVs are not zero-emitting vehicles.
The hope that clean sources of energy from solar, wind, hydro and geothermal will replace dirty fossil fuels to generate electricity remains bleak in the near and not too distant future. U.S. net electricity generation from renewable and clean sources of energy showed only a 2% increase from 1993 to 2011 and is projected to increase only another 3% by 2040. Without exception, a sad state of affairs!
Related Article: GM Experiences Record Sales for Eco-Friendly Cars
Safety of EVs remains another concern. Long battery runtimes have been achieved by packing more active material into a cell by making the electrodes and separator thinner. This enabled a doubling of energy density since lithium-ion was introduced in 1991. Battery developers are not foolish and have engineered-in safety systems, which prevent them from getting too hot or over-charged. The lithium-ion cells have to be pushed to extreme lengths to get them to overheat, break or explode?lengths well beyond their safety limits. The concern stems from the limited time EVs have been in the field. Testing technology under pristine or controlled conditions is one thing, operating in everyday situations by the general public is entirely an entirely different matter.
According to UL?s report Powering the New Generation of Electric Vehicles, ?Beyond the technical sophistication of electric-powered vehicle propulsion, EVs require a complex system of electrical and electronic components to support the recharging of the vehicle?s on-board batteries. On the other side, an electrical system is required to provide the requisite power to recharge EVs. These on-board and off-board systems and components must be designed to integrate seamlessly with one another to ensure a safe, convenient and trouble-free experience for consumers. On-board and off-board charging systems typically include some or all of the following individual components?: EV on-board and off-board components?:
Related Article: Solar and Big Oil Join Forces in Middle East
On the Utility side, an article ?Utilities Conflicted Over Electric Cars? stated:
??.. electric car charging at 120-v will draw about 1500 watts of power, similar to a large microwave oven, or small air conditioner. Both the LEAF and VOLT will also charge at 3300 watts (240-v) potentially exacerbating the concern.
??.. By itself this draw will have a negligible effect on the grid. What the electric companies fear, however, is clustering of EV owners within certain neighborhoods, potentially taking own local transformers.?
??.. ?nightmare scenario? is described as a hot summer afternoon when a cluster of EV owners come home to their neighborhood, turn on their air conditioners, microwaves plasma screen TVs, and plug in their electric cars all at the same time.?
??.. doubling the load of a conventional home, It?s a big problem.?
?The utility infrastructure was built for something completely different. Neighborhood concentrations pulling new EV loads at 6 p.m. on still-hot afternoons could be disastrous for local distribution grids.? That?s one reason he?s hoping to see continued, and expanded, federal incentives to build out infrastructure for electric vehicle (EV) charging. Targeted charging technology would let utilities ?talk? to chargers and spread out the demand and underpin the incentives to integrate an array of ?smart? technology across the electricity system.?
Another form of EVs that is starting to emerge is hydrogen fuel-cell vehicles. (FCV). FCVs run on hydrogen gas rather than gasoline. Fuel cells convert hydrogen gas stored onboard with oxygen from the air into electricity to drive the electric motor that propels the vehicle. ?FCVs have greater range and shorter refueling times than battery-powered ones and can be used in large vehicles like trucks and SUVs. But the processes used for extracting and transporting hydrogen can be energy intensive and rely on fossil fuels. Besides the high price of FCVs, one major barrier to wide-spread adoption of fuel-cell cars is the need for a network of refueling stations, which according to analysts cost upward of $1 million each to build. But hydrogen-powered cars cannot exist without hydrogen filling stations, and vice versa.?
In closing, society needs EVs but EVs must deliver what society needs. The goods are just not ready. More time is needed to develop an EV that gives consumers what they value and what they can afford.
Shakespeare said it best some 410 years ago in Hamlet ?What feast is toward in thine eternal cell, You?. Are here arriv?d,?. High on a stage be placed to the view; And let me speak to the yet unknowing world, How these things came about?. Of accidental judgments?. And, in this upshot, purposes mistook Fall?n on th? inventors? heads: all this can I (?EV?) Truly deliver.
By. Dr. Barry Stevens
Source: http://oilprice.com/Alternative-Energy/Renewable-Energy/Are-EVs-Ready-to-Meet-Societys-Demands.html
insanity workout mass effect 3 launch trailer yelp huntsville al channel 2 news adrienne bailon yelp stock
কোন মন্তব্য নেই:
একটি মন্তব্য পোস্ট করুন