Wednesday, December 29, 2010

Privacy Policy for considerpossibleglobalwarming.blogspot.com

Privacy Policy for considerpossibleglobalwarming.blogspot.com

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Monday, December 27, 2010

LATEST MILEAGE NEWS

LATEST MILEAGE NEWS

Mileage of the Beetle and drag reducer have been significantly increased by lowering rolling resistance of the car's tires. Currently, mileage is close to 65 miles per gallon at 65 miles per hour.

This car is now about as good as it gets. Further steps available to reach even higher fuel economy are:

1. Adding an electric drive (e.g., hybrid conversion)
2. Redesign the car body for lowest drag
3. Incorporate an improved engine.

I am beginning to work on all of these. These steps are much harder than the past modifications to the Beetle. I hope to be able to report on progress later this year.

Ernie Rogers

New engine cycle is 60% efficient

Analysis of a new engine design is complete! Here are some facts about it:

1. Utilizes a new thermodynamic cycle

2. Will run on most fuels interchangeably with very low emissions

3. Initial design is a compact engine, 130 hp

4. Over 60% efficient over most of its operating range

5. Which means it can help to stop global warming!

We are now looking at ways to fund construction of the small prototype engine. Any suggestions or offers of assistance are welcome. I may be reached at Ernsdesk@aol.com

The engine design is built around a new "thermodynamic cycle." This is a simplified model of how the engine works, which ignores all the messy details of a real engine such as friction, heat loss, and inertia. The cycle is described as a sequence of operations on a captive ideal gas. The new engine cycle is a combination of two old cycles, the Atkinson (or Miller) cycle and the Diesel cycle: the Atkinson-Diesel cycle.

Oh, no, you can't use this ideal cycle formula to design the exact engine and determine its efficiency, but it gives direction to the analysis. A separate program is used for the actual engine design.

I wanted to post the complete description of the cycle and derivation of the cycle efficiency here, but the equations didn't come over in the document. Send me an email if you would like a copy of the complete Atkinson-Diesel cycle description.

Three Laws of Car Fuel Economy

Okay, the price of car fuel is going through the roof. What are we going to do about it? Drive less?--That's a very good way to stop global warming. Not a good way to be at Aunt Martha's picnic this weekend.

We could get a super-efficient car (like mine--gets 65 mpg) or get a super-efficient engine (like the one under development--see the full theory at http://www.ernsblog.com/), but you would probably miss the picnic. How about some ways to really cut the cost of gasoline TODAY?

That brings me to a new set of rules. You might say they are Rogers' Laws of Car Fuel Economy. These were mostly known before. They may not actually work for everybody's car, depending on how the car was engineered. A well-engineered car should follow the rules to a "T."

Here are the rules. By following them, you should be able to cut your fuel costs by 20% or more, starting today!

Three Laws of Car Fuel Economy
Ernest Rogers May, 2008

1. In highway driving, for each 5 mph that you slow down, your mileage will increase by 10%.
_______

2. For any trip with a present average speed of (mph) and fuel consumption of (mpg), if you speed up to save time, the extra fuel you will use can be estimated by—

Extra gallons = (mph /mpg) x (minutes saved /35)

In words, if you divide your normal speed by your usual mpg, then multiply by minutes you want to save (by speeding up) and divide by 35, that’s the amount of extra fuel you can expect to use. It is a handy rule to see the fuel cost for speeding to save time.
_______

3. Very efficient drivers use pedals less and can get 30% better mileage than inefficient drivers.

CAN WE BUILD MORE EFFICIENT ENGINES?

Stop global warming

Yes, I think we can. The present internal combustion engine was mostly developed in a time when fuel cost and efficiency were not imperatives. We need to go back to the early days of engine devleopment and reassess the way designers handled branches in the design road. We may have overlooked some better choices way back when the discovery of oil in Oklahoma and Texas seemed to say that there would be cheap gasoline forever.

One of these early branches in the road was a choice between four-stroke cycle engines and two-stroke cycle engines for automobiles. At the time, we used carburetors to feed fuel to the cylinders. In this context, the four-stroke engine is a far better choice. (More efficient and less polluting.)

But, the trend today is toward injection of fuel directly into the cylinders. With this modern option, the two-stroke cycle actually provides a far more efficient engine. Here are some other choices that need to be reviewed:

1. Engines are only designed for either gasoline or diesel, and nothing else.
2. Compression ratios are lower than one would choose for best efficiency.
3. Engine design principles are not based on a need to reduce weight.

Some people are looking at the exciting possibilities still left to be explored. A possible outcome may be radically new engine types in the near future.

Ernie Rogers

Schwarzenegger to Obama cabinet: Water... please!

From: Peter Henderson, Reuters

Schwarzenegger to Obama cabinet: Water... please!

SAN FRANCISCO (Reuters) - California Governor Arnold Schwarzenegger has demanded that President Barack Obama's cabinet rethink federal policy that would divert water from parched farms and cities to threatened fish, his administration said on Wednesday.
California's rivers used to brim with salmon and sturgeon, but a massive system of canals diverted water that fed farms and cities, now suffering through a third year of drought.
Schwarzenegger has gained credibility as an environmentalist for his push to curb greenhouse gases but he argued that federal plans to save fish will worsen a water crisis that has cost farmers more than $700 million and caused mandatory rationing in cities of the most populous state.
Article continues

Global Salmon Study Shows 'Sustainable' Food May Not Be So Sustainable

From: Science Daily

Popular thinking about how to improve food systems for the better often misses the point, according to the results of a three-year global study of salmon production systems. Rather than pushing for organic or land-based production, or worrying about simple metrics such as "food miles," the study finds that the world can achieve greater environmental benefits by focusing on improvements to key aspects of production and distribution.
For example, what farmed salmon are fed, how wild salmon are caught and the choice to buy frozen over fresh matters more than organic vs. conventional or wild vs. farmed when considering global scale environmental impacts such as climate change, ozone depletion, loss of critical habitat, and ocean acidification.
he study is the world's first comprehensive global-scale look at a major food commodity from a full life cycle perspective, and the researchers examined everything -- how salmon are caught in the wild, what they're fed when farmed, how they're transported, how they're consumed, and how all of this contributes to both environmental degradation and socioeconomic benefits.
Article continues: http://www.sciencedaily.com/releases/2009/11/091124152803.htm