Home |
Search |
Today's Posts |
#121
|
|||
|
|||
Was: Moss/Lichen on roof, now we are into pollution.
IMM wrote:
"The Natural Philosopher" wrote in message ... Performance with lithium polymer cells is more than adequate - in fact it is stupendous. Distribution of energy exists in the national grid. Overnight charging would actually improve power staion efficiency as it happens when other electrical uses are low, so power stations run continuosly - much better for efficiency. The only unknown to me is the energy cost and lifetime of battery production and recycling. But I doubt it is worse than making e.g aluminium for car engines, or steel for transmissions. The cars are simpler too - all wheel drive with motors integarted into the hubs, no need for gearboxes by and large, or transmissions. In short its a simpler beast. One enormous battery pack, 4 motors and a bit of power electronics. That replaces engine, cooling system, transmiision, axles - in short most of the heavy bulky bits. No maintenance, apart from replacing defective cells and so on. No oil changes, or plug changes. Performance with most of te weight slung low under the cahssis, and a motor on every wheel, with de facto traction control - its a rally drivers dream come true. No gears to go, no clutch to go. And easy access to better than 800bhp if you need it, or the ability to trickle along at 90% efficiency at much lower power levels. £00 miles + range on an overnight charge. How about heating the car in winter? This would be a traditional electric element, which consumes a lot of power from batteries. The car would probably need a layer of insulation to keep heat in and heat out in summer. Do the batteries produce enough heat to heat the cars cabin? Oh, I am sure it ouuld be triple insulated to latest building standards and heat by dint of the sun shining on it... --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.558 / Virus Database: 350 - Release Date: 02/01/2004 |
#122
|
|||
|
|||
Was: Moss/Lichen on roof, now we are into pollution.
IMM wrote:
"The Natural Philosopher" wrote in message ... As you may know, I have a little hobby. Flying electric model aircraft. Up to tow years ago there was no way to even approach the power and energy densities of a tank of fuel. There is now. And its tipped the balance so that applied to cars, it comes out damn near equal overall in terms of power and range to weight of a tank of petrol and what is needed to make it turn the wheels.. I can buy all I need to use this technology NOW. So, electric cars are "equal" to petrol right now in range and performance. They CAN be. One allegedly is. Apart from the zero emissions at point of use (brilliant as cities are cleaned right up), what else is there to tip the balance? Generating more electricity (very dirty procedure at present) at power stations is going to produce more emissions. Cleaning this up is an expensive nightmare, not to mention the electrical distribution system for re-charging vehicles. Yes, but the alternatives are worse. At least the potential to generate electricty from non fossil sources exists: hydrogen cars still need hydrogen, and have neither the range, nor indeed the possibility to generate the hydrogen cheaply except by electricity. The battery wins over the hydrogen car. Period. Whatever is dirty in a power statin is dirtier in a car. If you can go froim fuel to power in a car at a certain level ofeffciency, then certainly you can go from fuel to power, and electricity at least as efficiently and at least at same level of pollution in a power station. In fact its possible to do better when the weight limitations of car engines are removed. Otherwise we would have to look at biofuels - methanol, biodiesl etc. - and hope that the economics of production make more sense. I don;t think they do. --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.558 / Virus Database: 350 - Release Date: 02/01/2004 |
#123
|
|||
|
|||
Was: Moss/Lichen on roof, now we are into pollution.
Franz Heymann wrote:
"The Natural Philosopher" wrote in message ... Martin Brown wrote: Solar power works reasonably at latitudes below about 45 degrees, but it is quite frankly a complete non-starter at latitudes 55N and above. Unless you count biomass conversion in forests for indirect fuel generation. Agreed. Horses for courses. However tide power is not impossible either. Not an easy one tho. If only we could get fusion power working... Fusion power is going to turn out to be a great deal filthier than fission power. I don't think so. The fisson products would all be relatively short lived isoptopes, and teh main product is helieum. Non radioactve helieum Its only the vast amounts of radiation intereacting with the shielding that would cause some radioactive compounds to be generated. Fission power is the cleanest and least polluting energy source ever produced on earth. Yes, I tend to agree with you. The number of deaths per kilowatt hour which occur in the extraction and processing of fossil fuels is a lot higher than the corresponding number for the extraction of uranium I would not be surprised. The pollution of the atmosphere by fossil fuel stations is vastly worse than the pollution caused by nuclear power stations. That is certainly true. The radioactive contamination by a nuclear station is negligible, despite the protestations of the anti-nuclear lobby. And even that contamination is largely caused by irresponsible practices. Yes, the arguments are kind of curious:- "We mustn't use nuclear power because the waste it generates might after a few hundred years cause a little environmental change in certain deep caves or the bottom of the ocean, so we had better stick to natural gas and oil and coal, which are running out, are absolutely known TO BE causing MAJOR environmental impact, and WILL DEFINITELY affect the WHOLE HUMAN RACE in a few years, extremely adversely". The real reason is probably to limit the suppies of enriched uranium in case some gets into the wrong hands... Franz |
#124
|
|||
|
|||
Was: Moss/Lichen on roof, now we are into pollution.
IMM wrote:
"Franz Heymann" wrote in message ... "The Natural Philosopher" wrote in message ... Franz Heymann wrote: So with a large area of Thermolux you might get to 200% more easily than with other panels? Please, please understand that there is no such concept as "efficiency per square foot" in either engineering or in physics. Efficiency is usually simply the ratio between the output power and the input power of a system. Actually that is not totally so. Efficency is a term that can be applied to more things than power. For example, one could define the efficiency of a roof in terms of the amount of water that runs off versus the total amount that falls on it. One can define an efficient business as one that has the highest sales value, or margin value, per employee. Efficiency is a measure of the efficacy against a theoretically perfect system, That is the beginning of a circular argument. of something doing the job it is designed to do. As normally measured by how much it produces of the desired output versus how much input it needs. If we for example take solar energy, it is not menaingful to say that e.g. civering every roof in lonbdon with a .3% efficient solar panel is inefficient, if the cost of so doing would actually be less than building and running an equivalent power station over the same . timescales. One could argue that in terms of various resources one or the other is more efficient. The power station takes up less space, but uses more fossil fuel. The electric panel is inefficient in overall thermodynamic terms, but maybe more efficient in the actual use of sunlight, since we don't have to wait a couple of million years for the trees to turn back into oil...The power station has far less labour content involved, but perhaps uses more materials. uppose fo an instant that we cracked fusion power. Who cares about efficiency, since the actual waste products - helium and heat - are totally insignificant in a global context. At that point electcity would become the cheapest form of energy, subject to no taxes at all probably, and we would all be driving electric cars, and heating our houses electrically, immediately :-) Thanks for the homily. I agree that in general usage, "efficiecy" is bandied around with gay abandon. However, the discussion about solar panels was a scientific/engineering one. To talk about "efficiency per unit area" in such a context is pure nonsense. What balls! I reserve a part of a roof of 20ft x 10ft, 200 squ foot. I put in flat plate collectors, I get n volume of solar heated hot water on a certain isolation at a certain time of year. I put in the same 200 squ foot Thermomax solar collectors. I get n x 2 volume of hot water on the same isolation and certain time of year. For each squ foot of roof the Themomax is 100% more efficient. Is that clear? I could use 400 squ foot of flat plate collector on the roof, twice the area, and produce the same volume of solar hot water as the Thermomax solar collectors which takes up half as much square footage. The area is "very" important in this instant. Is that clear? Yes, but efficiency is independent of that IMM. Thats tantamount to saying a 5oKw boiler is twice as efficient as a 25Jw one. Because it takes up the same floor space. --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.558 / Virus Database: 350 - Release Date: 02/01/2004 |
#125
|
|||
|
|||
Was: Moss/Lichen on roof, now we are into pollution.
IMM wrote:
"Franz Heymann" wrote in message ... The radioactive contamination by a nuclear station is negligible, despite the protestations of the anti-nuclear lobby. If every power staionin the world was nuclear we would be in big trouble getting rid of the waste. Might cost less than trying to get rid of all the CO2 tho. And even that contamination is largely caused by irresponsible practices. The human element. When it breaks down, big, big problems. Best forgot nuclear as cleaner, lower tech alternatives are around right now. The biggest single disaters have been caused by other things. Earthquake in Iran, 30,000 dead. Smilar erahquake in San francisco with modern building regs, 3 dead. How many died at Bhopal. Non nuclear accident. How many die in coal mines. Non nuclear accidents. How many did Saddam Husseing gas and kil. Non nuclear accident, and, if he had no oil to sell, because we wre all nuclear, how many would he have been ABLE to kill? How many die on oil platforms every year. Non nuclear. How many die when monsoons fail, or bangladesh gets flooded (again) Strong evidnce to link with fossil fuel burning. In short, the Nuclear power scenario stacks up to one or two accidents - five mile island and chernobyl. Chernobyl was probably no more expensive than an oil tanker sinking in terms of clean up. Fve mile island - I forget, but it hasn't ruined the country. --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.558 / Virus Database: 350 - Release Date: 02/01/2004 |
#126
|
|||
|
|||
Was: Moss/Lichen on roof, now we are into pollution.
Rod Hewitt wrote:
"IMM" wrote in : How about heating the car in winter? This would be a traditional electric element, which consumes a lot of power from batteries. The car would probably need a layer of insulation to keep heat in and heat out in summer. Do the batteries produce enough heat to heat the cars cabin? Last I heard, it sounded as if 'they' were going to add a small petrol burner to provide heating. Apparently this was the most efficient/sensible option, at least in the early days of such vehicles. Perhaps we will get SEDBUK ratings on them as well as mpg equivalents? The total power needed to run our car at - say - 30 mph, is about 5kW. At least 5% of that is likley to be wasted as heat - say 250W. That is potentially available to heat the car without losing anything. I would not think that more than another 2-300W would be needed to heat the car in any circumstances. So yes, there is enough energy. Maybe the heater and/or aircon would knock the range down 20%, but it does that on a normal car anyway. Rod |
#127
|
|||
|
|||
Was: Moss/Lichen on roof, now we are into pollution.
IMM wrote:
"Rod Hewitt" wrote in message .. . "IMM" wrote in : How about heating the car in winter? This would be a traditional electric element, which consumes a lot of power from batteries. The car would probably need a layer of insulation to keep heat in and heat out in summer. Do the batteries produce enough heat to heat the cars cabin? Last I heard, it sounded as if 'they' were going to add a small petrol burner to provide heating. Apparently this was the most efficient/sensible option, at least in the early days of such vehicles. Perhaps we will get SEDBUK ratings on them as well as mpg equivalents? A car has no insulation, as they produce so much waste heat the engines can provide enough even in the coldest conditions. Adding insulation, bonded to the cars sheet metal around the cabin, would improve matters. The drive motors and batteries produce heat, so this must be available for use. Yes. Cars ARE in fact insulated very well. You only need to take a ride in e.g. my old series III landrover woith nowt but a sheet of aluminium between you and the elements to see how MUCH insulation a modern car has by comparison. Most cars have something like 1/4" of fibre and carpet on teh floors, the rear seats line that part of the car, and the doors usually have a 2-4" aiorgap in them. Dreaughts are of necssity totally absent by and large, and roofs are normally lined with headlining and again about 1/4" of insulation. some cars even have double glazed windows. Even with a U value of about 5 - equivalent to a totally single glazed car, and a square meterage area of - what - 16 sq meters of cabin, that is 80W per degree C differential, so AT WORST for -5 outside and 25C inside, it only needs 2.4Kw to heat it. In practice that is a fairly ludicrous U vcale, becaseu teh glass is thicker than window glass, and most of the cabin is well insulated. Lets face it, a lining of 15mm celotex is not going to cost very much. And there is going to be a wedge of batteries and electronics under the floor kicking out a hundred watts. Getting heat from the motors - if thse are ouboard on the wheels - is not so easy, but even there, if wound with pipe istead of solid wire, the heat could be removed bu circulatng coolant through them.. --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.558 / Virus Database: 350 - Release Date: 02/01/2004 |
#128
|
|||
|
|||
Was: Moss/Lichen on roof, now we are into pollution.
On Wed, 14 Jan 2004 01:09:00 +0000, The Natural Philosopher
wrote: IMM wrote: "The Natural Philosopher" wrote in message ... Eh? Last report was september 2003? http://www.acpropulsion.com/ACP_Bib_results.pdf "AC PROPULSION INC. Dedicated to Creating Electric Vehicles that People Want to Drive www.acpropulsion.com September 29, 2003 San Francisco FOR IMMEDIATE RELEASE tzero Earns Highest Grade at 2003 Michelin Challenge Bibendum...." Pity the background does people's eyes in, which makes it difficult to read. I'll give one a miss. How can a plain white PDF file do your eyes in? Well he has been talking about "the laying on of hands" and Wankel engines in the last few days......... ..andy To email, substitute .nospam with .gl |
#129
|
|||
|
|||
Was: Moss/Lichen on roof, now we are into pollution.
"The Natural Philosopher" wrote in message ... IMM wrote: "The Natural Philosopher" wrote in message ... Eh? Last report was september 2003? http://www.acpropulsion.com/ACP_Bib_results.pdf "AC PROPULSION INC. Dedicated to Creating Electric Vehicles that People Want to Drive www.acpropulsion.com September 29, 2003 San Francisco FOR IMMEDIATE RELEASE tzero Earns Highest Grade at 2003 Michelin Challenge Bibendum...." Pity the background does people's eyes in, which makes it difficult to read. I'll give one a miss. How can a plain white PDF file do your eyes in? I have acrobat 6 and it has checkers on the background. --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.558 / Virus Database: 350 - Release Date: 02/01/2004 |
#130
|
|||
|
|||
Was: Moss/Lichen on roof, now we are into pollution.
"Andy Hall" wrote in message ... On Wed, 14 Jan 2004 01:09:00 +0000, The Natural Philosopher wrote: IMM wrote: "The Natural Philosopher" wrote in message ... Eh? Last report was september 2003? http://www.acpropulsion.com/ACP_Bib_results.pdf "AC PROPULSION INC. Dedicated to Creating Electric Vehicles that People Want to Drive www.acpropulsion.com September 29, 2003 San Francisco FOR IMMEDIATE RELEASE tzero Earns Highest Grade at 2003 Michelin Challenge Bibendum...." Pity the background does people's eyes in, which makes it difficult to read. I'll give one a miss. How can a plain white PDF file do your eyes in? Well he has been talking about "the laying on of hands" and Wankel engines in the last few days......... LOL. Boiled beef and carrots, boiled beef and carrots.... --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.558 / Virus Database: 350 - Release Date: 02/01/2004 |
#131
|
|||
|
|||
Was: Moss/Lichen on roof, now we are into pollution.
IMM wrote:
"Rod Hewitt" wrote in message .. . "IMM" wrote in : A car has no insulation, as they produce so much waste heat the engines can provide enough even in the coldest conditions. Adding insulation, bonded to the cars sheet metal around the cabin, would improve matters. The drive motors and batteries produce heat, so this must be available for use. And also add to the cost and weight... Insulation should not add that much weight. Cost? Mass production will bring that down. I doubt that any heat would be available from motors if they are fitted into the wheel hubs. If they are. Most electric cars have one motor. There may be problems supplying enough electrical power for the demisters, seat heaters (oops, well I have a Saab), and other things (maybe needing a heater for the screen/headlamp wash and other currently unnecessary/rarely fitted devices). Cars are full of unnecessary crap which add cost and weight affecting fuel consumption, such as rev counters. Why does anyone need to know how much the engine is revving in a normal road car? Beats me. I know when it is revving, I hear and feel it. If it is revved too much the management system cuts it out. True. Fashion accessory. An electric window on the drivers side is unnecessary too IMHO its mandatory. Its the window you use the most in paying for parking tickets, and pulling them out of silly little slots only to feed them into other sily little slots later...not to mention tossing coins into teh darford crossing machines. The ability to get it down, and up, quickly, without doing more than touch a button is essential. , as are electric sunroofs, which are a British fascination. The French don't want to know them. Did you know IMM that it has been calculated that the weight, ad cost, of winding handles exceeeds teh weight, and cost, of electrically driven windows and sunroofs? No. I don't suppose you do. Or that the loss in power due to aerodynamic compromise of an open window in hot weather is greater than the loss due to using a modern efficient aircon? No, I don't suppose you do. Or that the losses in colling an engine via teh viscous fan exceed the losses in blowing hopt airt into te caboin in winter? You probably could work tat one out.. Why isn't the a/c an absorption system using waste engine heat, instead of taking power off the crank, reducing mpg? Because its low grade power, and would need a HUGE HEAVY installation to get colling out of it. Its time you enlisted in a snotty uni and learnt basic engineering. --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.558 / Virus Database: 350 - Release Date: 02/01/2004 |
#132
|
|||
|
|||
Was: Moss/Lichen on roof, now we are into pollution.
"The Natural Philosopher" wrote in message ... IMM wrote: "Franz Heymann" wrote in message ... "The Natural Philosopher" wrote in message ... Franz Heymann wrote: So with a large area of Thermolux you might get to 200% more easily than with other panels? Please, please understand that there is no such concept as "efficiency per square foot" in either engineering or in physics. Efficiency is usually simply the ratio between the output power and the input power of a system. Actually that is not totally so. Efficency is a term that can be applied to more things than power. For example, one could define the efficiency of a roof in terms of the amount of water that runs off versus the total amount that falls on it. One can define an efficient business as one that has the highest sales value, or margin value, per employee. Efficiency is a measure of the efficacy against a theoretically perfect system, That is the beginning of a circular argument. of something doing the job it is designed to do. As normally measured by how much it produces of the desired output versus how much input it needs. If we for example take solar energy, it is not menaingful to say that e.g. civering every roof in lonbdon with a .3% efficient solar panel is inefficient, if the cost of so doing would actually be less than building and running an equivalent power station over the same . timescales. One could argue that in terms of various resources one or the other is more efficient. The power station takes up less space, but uses more fossil fuel. The electric panel is inefficient in overall thermodynamic terms, but maybe more efficient in the actual use of sunlight, since we don't have to wait a couple of million years for the trees to turn back into oil...The power station has far less labour content involved, but perhaps uses more materials. uppose fo an instant that we cracked fusion power. Who cares about efficiency, since the actual waste products - helium and heat - are totally insignificant in a global context. At that point electcity would become the cheapest form of energy, subject to no taxes at all probably, and we would all be driving electric cars, and heating our houses electrically, immediately :-) Thanks for the homily. I agree that in general usage, "efficiecy" is bandied around with gay abandon. However, the discussion about solar panels was a scientific/engineering one. To talk about "efficiency per unit area" in such a context is pure nonsense. What balls! I reserve a part of a roof of 20ft x 10ft, 200 squ foot. I put in flat plate collectors, I get n volume of solar heated hot water on a certain isolation at a certain time of year. I put in the same 200 squ foot Thermomax solar collectors. I get n x 2 volume of hot water on the same isolation and certain time of year. For each squ foot of roof the Themomax is 100% more efficient. Is that clear? I could use 400 squ foot of flat plate collector on the roof, twice the area, and produce the same volume of solar hot water as the Thermomax solar collectors which takes up half as much square footage. The area is "very" important in this instant. Is that clear? Yes, but efficiency is independent of that IMM. Thats tantamount to saying a 5oKw boiler is twice as efficient as a 25Jw one. It is not. Solar collectors produce hot water. Some produce more than others for the same area, hence more efficient for a given area. --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.558 / Virus Database: 350 - Release Date: 02/01/2004 |
#133
|
|||
|
|||
Was: Moss/Lichen on roof, now we are into pollution.
"The Natural Philosopher" wrote in message ... IMM wrote: "Franz Heymann" wrote in message ... The radioactive contamination by a nuclear station is negligible, despite the protestations of the anti-nuclear lobby. If every power staionin the world was nuclear we would be in big trouble getting rid of the waste. Might cost less than trying to get rid of all the CO2 tho. And even that contamination is largely caused by irresponsible practices. The human element. When it breaks down, big, big problems. Best forgot nuclear as cleaner, lower tech alternatives are around right now. The biggest single disaters have been caused by other things. Warped logic. Two wrongs don't make a right. What you are saying is that the odd nuclear disaster affecting millions of people is acceptable ...... because other disasters have been worse. Earthquake in Iran, 30,000 dead. Smilar erahquake in San francisco with modern building regs, 3 dead. Lets make a nuclear disaster and all join in. The earthquake was a human failure. They knew it was am earthquake zone. How many die when monsoons fail, or bangladesh gets flooded (again) Strong evidnce to link with fossil fuel burning. Fossil fuel burning can be drastically reduced by simple low tech means. In short, the Nuclear power scenario stacks up to one or two accidents - five mile island and chernobyl. And Windscale in 1958...and others around the world. Chernobyl was probably no more expensive than an oil tanker sinking in terms of clean up. 100,000s are suffering long term effects from the fall out. Fve mile island - I forget, but it hasn't ruined the country. --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.558 / Virus Database: 350 - Release Date: 02/01/2004 |
#134
|
|||
|
|||
Was: Moss/Lichen on roof, now we are into pollution.
"The Natural Philosopher" wrote in message ... Franz Heymann wrote: "The Natural Philosopher" wrote in message ... Martin Brown wrote: Solar power works reasonably at latitudes below about 45 degrees, but it is quite frankly a complete non-starter at latitudes 55N and above. Unless you count biomass conversion in forests for indirect fuel generation. Agreed. Horses for courses. However tide power is not impossible either. Not an easy one tho. If only we could get fusion power working... Fusion power is going to turn out to be a great deal filthier than fission power. I don't think so. The fisson products would all be relatively short lived isoptopes, and teh main product is helieum. Non radioactve helieum Its only the vast amounts of radiation intereacting with the shielding that would cause some radioactive compounds to be generated. Fission power is the cleanest and least polluting energy source ever produced on earth. Yes, I tend to agree with you. The number of deaths per kilowatt hour which occur in the extraction and processing of fossil fuels is a lot higher than the corresponding number for the extraction of uranium I would not be surprised. The pollution of the atmosphere by fossil fuel stations is vastly worse than the pollution caused by nuclear power stations. That is certainly true. If all power stations were nuclear around the world the waste would pile up and be a huge problem in the future. Silly idea and should be forgotten. The radioactive contamination by a nuclear station is negligible, despite the protestations of the anti-nuclear lobby. And even that contamination is largely caused by irresponsible practices. Yes, the arguments are kind of curious:- "We mustn't use nuclear power because the waste it generates might after a few hundred years cause a little environmental change in certain deep caves or the bottom of the ocean, so we had better stick to natural gas and oil and coal, which are running out, are absolutely known TO BE causing MAJOR environmental impact, and WILL DEFINITELY affect the WHOLE HUMAN RACE in a few years, extremely adversely". The real reason is probably to limit the suppies of enriched uranium in case some gets into the wrong hands... Franz --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.558 / Virus Database: 350 - Release Date: 02/01/2004 |
#135
|
|||
|
|||
Was: Moss/Lichen on roof, now we are into pollution.
"The Natural Philosopher" wrote in message ... IMM wrote: "The Natural Philosopher" wrote in message ... As you may know, I have a little hobby. Flying electric model aircraft. Up to tow years ago there was no way to even approach the power and energy densities of a tank of fuel. There is now. And its tipped the balance so that applied to cars, it comes out damn near equal overall in terms of power and range to weight of a tank of petrol and what is needed to make it turn the wheels.. I can buy all I need to use this technology NOW. So, electric cars are "equal" to petrol right now in range and performance. They CAN be. One allegedly is. Apart from the zero emissions at point of use (brilliant as cities are cleaned right up), what else is there to tip the balance? Generating more electricity (very dirty procedure at present) at power stations is going to produce more emissions. Cleaning this up is an expensive nightmare, not to mention the electrical distribution system for re-charging vehicles. Yes, but the alternatives are worse. At least the potential to generate electricty from non fossil sources exists: hydrogen cars still need hydrogen, and have neither the range, nor indeed the possibility to generate the hydrogen cheaply except by electricity. The battery wins over the hydrogen car. Period. Whatever is dirty in a power statin is dirtier in a car. If you can go froim fuel to power in a car at a certain level ofeffciency, then certainly you can go from fuel to power, and electricity at least as efficiently and at least at same level of pollution in a power station. In fact its possible to do better when the weight limitations of car engines are removed. Otherwise we would have to look at biofuels - methanol, biodiesl etc. - and hope that the economics of production make more sense. I don;t think they do. Deserts are waiting to be farmed. --- -- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.558 / Virus Database: 350 - Release Date: 02/01/2004 |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Moss/Lichen on roof | United Kingdom | |||
Moss/Lichen on roof (was:victorian/edwardian houses or new houses?) | United Kingdom | |||
Moss/Lichen on roof (was:victorian/edwardian houses or new houses?) | United Kingdom | |||
[IBC] Air pollution (Lichen or knot) | Bonsai |