Monday, May 31, 2010

Fan Calculations - Measure Airflow with CFM

With one formula, you can find what fan is right for your home. This is the formula for fan CFM: Cubic feet per minute, more commonly known as CFM is calculated by the following formula: air speed (feet per minute) X area (square feet)=CFM. Not everyone is going to take a look at CFM, but for those who do it is a helpful tool. In simpler words than that of the formula, it is the amount of air a fan moves.

The amount of air depends on some other factors as well, such as the diameter and shape of the blades, speed at which the blades turn (revolutions per minute or rpm), horsepower (hp) of the motor, and overall fan design. These combined factors establish the air moving capacity of a fan. Fan capacity is measured in terms of the cubic feet, and again, this is how CFM (cubic feet per minute is determined.)

CFM and RPM are the two most important things to look for in a fan, so that you are guaranteed correct and effective operation. If you only know the RPM, and not the CFM, or vice versa, you should feel confident in your fan purchase. As long as you know one of the calculations, you are ensured of a well-working fan. However, if you are not satisfied with these calculations, this is not the only criteria one can use for evaluating fan performance.

One of the main qualifications, second to rpm and CFM measurement is noise level or decibel rating, followed by the next qualification of vibration. Look for fan noise levels rated in sones or decibels. Check these if the CFM or RPM still leave you unsettled about your fan choice.

A standard measurement of airflow indicates how many cubic feet of air passes by a stationary point in one minute. The higher the number, the more air is being forced through the system. The volumetric flow rate of a liquid or gas in cubic feet per minute equals the CFM, and one CFM equals approximately 2 liters per second.

Fan manufacturers base their measurements on a standard measurement with clean, dry air at a density of 0.075 pounds mass per cubic foot, barometric pressure at sea level of 29.92 inches of mercury, and a temperature of 70°F. These standard measurements are used to determine SCFM: Standard Cubic Feet Per Minute.

With the use of CFM and RPM, you can make a more educated choice when choosing your home ceiling, exhaust, or table fan, and know what you are getting!

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Sunday, May 30, 2010

How a Power Inverter Can Save You Money Over a Gasoline Generator

It is based on using an inverter in home emergency purposes rather than a completely built unit that would power an entire house. These units often require large battery banks with an external source of power such as sun or wind generators to keep the batteries charged. Nor will it cover large gasoline, diesel, or propane generators that are connected to the fuse box of a house and power an entire house.

What it will be covering are small home generators that usually have a 3-5 gallon gas tank and a 2- 6 HP engine. These are run outside the house and power certain appliances inside the house via an electrical cord attached to the generator. The electrical power inverter we will be discussing will be powered by a single car battery which will require recharging every one to two hours by running the engine of the car.

Studies have shown that a V-6 automobile engine uses approximately 0.5 gallons of gas for every 90 minutes it is run. What this translates out to is that if you were to run a 750 watt inverter, you would have to recharge a 120amp battery every 2 hours by idling the car for 10 minutes. This means that you could get 36 hours of use from a 750 watt inverter on one gallon of gasoline. This equals a $3.00 fuel price every 24 hours if gasoline is priced at $4 a gallon.

A 4400 watt gasoline generator uses about 3.2 gallons of gasoline for every 8 hours of service. This comes out to 9.6 gallons of gas for a 24 hour period or around $38 for 24 hours of use.

If you are using a smaller generator such as a 1000 watt model, which in most cases is more practical, you would be using 1.2 gallons every 5-8 hours depending on the load. This comes out to $5 every 8 hours ,or $15 for every 24 hour period.

Now for the power inverter numbers. If you were using a 750 watt power inverter, which would be enough to power a laptop, small tv, dvd player, satellite dish box, and a lamp it would use 0.2 gallons for every 8 hours or 0.6 gallons for every 24 hours. for a cost of $2.40.

In summary the cost of running a 4400 watt generator for 24 hours is $38 and a 1000 watt generator for 24 hours is $15 and the cost of the inverter for 24 hours is $2.40

I feel many people do not use power inverters in emergencies just because they aren't familiar with them. They're easier to hook up then a generator. You just have to clip it on to your battery, plus the savings is substantial if you have a power outage for an extended period of time. For more information on this subject and the products come visit http://www.inverterssavegas.com

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Saturday, May 29, 2010

How To Entertain A Thought

After studying scores of great thinkers like Leonardo Da Vinci, I think I've stumbled upon what really set them apart from the rest of the folks living (and thinking) at the same time.

It's remarkably simple. They learned how to entertain a thought.

Aristotle said, "It is the mark of an educated mind to be able to entertain a thought without accepting it."

Hmmm. To entertain a thought without accepting it.

We need to do that. Everyone needs to learn how to be good host or hostess to new ideas. In fact, our goal should be to become the Martha Stewart of mental entertaining!

What if you treated a new thought like a guest?

It's easier to think about mental entertaining if we put together a to-do list, just like Martha. Here it is:

#1 Make the first move.
First of all, you issue an invitation. Nothing fancy. You don't have to make any major investment or lifelong commitment. You're simply inviting this person in.

It's the same with initiating the entertainment of an idea. You might see a quote on the side of a bus somewhere, and decide you'd like to explore that concept more deeply. Or, maybe you find yourself bumping into the same topic all the time, and so you make up your mind to learn more about it. Either way, you need to be ready to initiate the process. Don't hide--you won't meet new ideas if you scurry away whenever the doorbell rings.

#2 Prepare.
Uh-oh. Your house is a mess. You'd better do some cleaning. You're not really trying to impress, but hey, you could certainly do some sprucing up and get the place looking neat and inviting.

Prepare for a new thought in the same way. Make some space in your mind to think about something new. According to Deepak Chopra, the well-known author on health and longevity, the average human has 60,000 thoughts a day. Pretty impressive? Well, here's the kicker: 57,000 of those are the same ones you had YESTERDAY! Now that's some serious clutter! Get rid of a few of those dusty old thoughts and make room for new ones.

#3 Offer a warm greeting.
When your new guest arrives, be warm and inviting. After all, you're hoping to start a friendship. Put your best foot forward.

It's the same with an idea. If you face it with skepticism, fear or detachment, you won't be entertaining it for long. You'll be eyeing your watch, yawning, or looking for a way to end the discussion early. You've got to be open and full of anticipation to prepare an environment in which new ideas will be explored and integrated fully. Just as it's no fair making lame excuses or having your friend call to interrupt the visit, it's also cheating to cut out too soon when it comes to entertaining an idea.

#4 Make introductions.
This is the big one. You would certainly introduce your guest to everyone at the party, with a special effort to connect them to those with whom they may have something in common.

Any new idea you consider will be more likely to be welcomed if you actively and intentionally introduce it to your other ideas and interests. Look for unusual and inspired pairings. How does it fit? Where does it fit? DOES it fit? You won't know until you try.

Picture Leonardo Da Vinci's mental entertaining. His new idea, Human Flight, arrives, and immediately Leo sets about introducing him to others. "Human, meet my good friend, Engineering, and his lovely wife, Fabric Design. Oh, and have you met Bird Anatomy? She lives just around the corner from you. Oh, Dr. Entomology has arrived! Listen, Dr. E is absolutely brilliant, but a bit hard of hearing. Ask her about her recent work on the wings of insects! Now, you all make yourselves comfy and I'll go get some more wine."

What happened at that party? Leonardo threw these ideas together, and BAM! What emerged was the idea for a perfectly designed parachute as well as a remarkable helicopter--hundreds of years before the Wright brothers started building their flying machines! Talk about a soaring success! Don't you wish you'd been there?

#5 Offer the best seat in the house.
You usually sit in that nice chair there by the fireplace, but when a special guest comes over, you graciously offer it.

When you are entertaining a new thought, give it the consideration it deserves. Every time you think a new thought, your brain is actually creating a new neural pathway. It's like a jungle in there, full of nerve endings and ganglia and all kinds of connections. Help it along. Make it comfortable.

Once you've considered an idea, that pathway is there. All you have to do to keep it "live" is to keep going down that path often enough to clear the trail, but not so often that it becomes a rut.

#6 Listen, inquire, and show interest.
Ask questions. Dig a little deeper. Find the connections to other people, places, and activities. Learn as much as you can about your new idea.

#7 Relinquish control.
Just like when you introduce guests to each other, you should not try to control the outcome. Some guests might hate each other on sight, while others click instantly. People might argue, or a married guest might sneak off to a back room with someone other than their partner. Anything can happen!

That's not up to you. You're having this party to offer an opportunity for people to connect. Make introductions, insert a few comments, smile and acknowledge everyone, but for the most part, just let things happen. Don't direct the flow of ideas.

#8 Leave room for future possibilities.
Even if you decide this guest of yours is insufferable, you don't want to burn any bridges. Be gracious, and be glad you were excellent enough to offer the invitation.

You're not going to like every idea that comes your way. And you might not find any other interest or idea that connects with it initially. That's fine. You need to develop the ability to recognize useful concepts and distinguish valuable and valid ideas from those lacking a strong foundation. That's what critical thinking is all about.

But you also need to file that idea away so that you can look it up if and when you DO meet a likely candidate for another gathering of thoughts.

There is a great deal of room for different styles of mental entertaining. Maybe you're best at dealing with only two ideas at a time, or maybe you want to throw a huge bash and welcome all comers.

Entertain in whatever style suits you. Tete-a-tete or bacchanal--it doesn't matter, as long as it's happening.

Learn how to entertain a thought. With a little effort, you'll become a perfect host or hostess to new ideas that come your way. And guess what? You'll have no hangover, no cleaning up, and no regrets.

Party on!

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