Not for love of money, but of Humanity. "Greater is he who works for the good of all, then he who works for the good of himself only" ~ Matthew 25:40: "The King will reply, 'I tell you the truth, whatever you did for one of the least of these brothers of mine, you did for me.'"- (NIV). I live in Singapore where the Emperor must not be disturbed.

Friday, April 1, 2011

Hybrid electric vehicles and steam/gas turbines.

View Post ponpokku (31-03-2011, 08:51 PM) wrote:
Re: encouraging environmentally-friendly lifestyle

i'm very ill-informed on hybrids fyi...
Hybrids conserve energy by turning unwanted kinetic energy (car movement when brake applied) into electrical energy (dynamo applied to sap motion of car), stored as 'chem energy' in battery and reused to drive electric motor when accelerator is applied again.
Equally ill-informed on calorie counts, just jokin, have replied to you at 31Mar2011 [link]: [GPGT] Travel on bicycle is good for the environment.
kekeke, u still didnt get the point? where does the electricity comes from? power station. power station burns what? oil, coal, gas, with oil being the most efficient. now power station burns oil to spin turbine (mechanical, deemed very inefficient by u), into electrical (household/electric car hub, again power loss) to chemical (car batteries, again power loss), then electrical to mechanical (engines, still power loss, plus friction and etc), how can it be more efficient tan simple oil to merchanical in a car?
anyone who learns physics will know output = (input - loss), output definitely lower. now how can ur 4 lvl losses output be greater than 1 level loss output?
i once saw something like this posted by a greenie on the net:
u all should buy less raw meat from supermarts and help cut down global meat consumption. it is good for the environment. be like me, i eat only canned meat.
i was like OMFG, where did the canned meat came from?
Oh deary me, did you even read to the end of my post you quoted, it contains a link to my post to yourself on the other thread, post titled 'For your own health sake, please correct your food calorie related misconceptions.' in the thread titled '[GPGT] Travel on bicycle is good for the environment'.[link].
FYI, its the one containing a picture of Ms Donna Simpson whose brains weigh little in proportion to her body size:

So you are wrong on the calorie counts and wrong again on the definition of 'Hybrid vehicles', the problem I see with you is that despite your activity in participating in these forums, you just don't seem to have the decency of fully reading post made in response to your comments.

FYI, the Wikipedia page on 'Hybrid electric vehicle' as these cars are known is found at where it is mentioned: "A hybrid electric vehicle (HEV) is a type of hybrid vehicle and electric vehicle which combines a conventional internal combustion engine (ICE) propulsion system with an electric propulsion system... Modern HEVs make use of efficiency-improving technologies such as regenerative braking, which converts the vehicle's kinetic energy into battery-replenishing electric energy, rather than wasting it as heat energy as conventional brakes do."

This concurs with my mention to you that the source of kinetic energy used to recharge the battery is actually unwanted kinetic energy dissipated, but for the engagement of the dynamo, would have been converted to heat energy and dissipated through the brake/ ventilation system.

The main source of energy remains the car's internal combustion engine in most cases, as mentioned in the adjacent thread, '[GPGT] Travel on bicycle is good for the environment'[link] "Even when aided with turbochargers and stock efficiency aids, most engines retain an average efficiency of about 18%-20%." [wiki: 'Internal combustion engine'].

On the other hand, "Combined cycle gas turbine plants are driven by both steam and natural gas. They generate power by burning natural gas in a gas turbine and use residual heat to generate additional electricity from steam. These plants offer efficiencies of up to 60%." [wiki: Electricity generation>Turbines]

Thus the case for completely electricity driven cars.

In any case, the Honda Insight (2000) [wiki] is noted to have a highway/ city rating of 4.4 L/100 km, a gasoline consumption rate way below that of any solely petrol driven car.


At/ related:
01Apr2011: encouraging environmentally-friendly lifestyle

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