Thank you Dave Russell for giving me this love! He just passed away on February 1, 2022. He is so missed!
A fan is a powered machine used to create a flow of air. A fan consists of a rotating arrangement of vanes or blades, generally made of wood, plastic, or metal, which act on the air. The rotating assembly of blades and hub is known as an impeller, rotor, or runner. Usually, it is contained within some form of housing, or case. This may direct the airflow, or increase safety by preventing objects from contacting the fan blades. Most fans are powered by electric motors, but other sources of power may be used, including hydraulic motors, handcranks, and internal combustion engines.
Mechanically, a fan can be any revolving vane, or vanes used for producing currents of air. Fans produce air flows with high volume and low pressure (although higher than ambient pressure), as opposed to compressors which produce high pressures at a comparatively low volume. A fan blade will often rotate when exposed to an air-fluid stream, and devices that take advantage of this, such as anemometers and wind turbines, often have designs similar to that of a fan.
Typical applications include climate control and personal thermal comfort (e.g., an electric table or floor fan), vehicle engine cooling systems (e.g., in front of a radiator), machinery cooling systems (e.g., inside computers and audio power amplifiers), ventilation, fume extraction, winnowing (e.g., separating chaff of cereal grains), removing dust (e.g. sucking as in a vacuum cleaner), drying (usually in combination with a heat source) and providing draft for a fire. Some fans may be indirectly used for cooling in the case of industrial heat exchangers.
While fans are effective at cooling people, they do not cool air, but rather work by evaporative cooling of sweat and increased heat convection into the surrounding air, due to the airflow from the fans. Thus, fans may become less effective at cooling the body if the surrounding air is near body temperature and contains high humidity.
History
The punkah (a.k.a fan) was used in India about 500 BCE. It was a handheld fan made from bamboo strips or other plant fiber, that could be rotated or fanned to move air. During British rule, the word came to be used by Anglo-Indians to mean a large swinging flat fan, fixed to the ceiling and pulled by a servant called the punkawallah.
Mechanical revolving blade fans are made in a wide range of designs. They are used on the floor, table, desk, or hung from the ceiling (ceiling fan).
They can also be built into a window, wall, roof, chimney, etc. Most electronic systems such as computers include fans to cool the circuits inside, and in appliances such as hair dryers and portable space heaters and mounted/installed wall heaters. They are also used for moving air in air-conditioning systems, and in automotive engines, where they are driven by belts or by a direct motor. Fans used for comfort create a wind chill by increasing the heat transfer coefficient but do not lower temperatures directly. Fans used to cool electrical equipment or in engines or other machines do cool the equipment directly by forcing hot air into the cooler environment outside of the machine.
There are three main types of fans used for moving air, axial, centrifugal (also called radial) and cross flow (also called tangential). The American Society of Mechanical Engineers Performance Testing Code 11 (PTC)[ provides standard procedures for conducting and reporting tests on fans, including those of the centrifugal, axial, and mixed flows.
If you want to read a lot more, go here:
https://en.wikipedia.org/wiki/Fan_(machine)
- 2 tablespoons hot sauce
- 4 frozen breaded chicken breasts
- 1 tablespoon light brown sugar
- 1 teaspoon cayenne pepper
- 1/2 teaspoon chili powder
- 1/2 teaspoon paprika
- 1/2 teaspoon garlic powder
- 4 tablespoons butter, melted
- 4 slices white bread
- 4 slices Colby jack cheese
- 8 slices bread & butter pickles
- Brush hot sauce on both sides of chicken breasts and place on a baking sheet. Cook according to package directions.
- Meanwhile, in a small bowl, combine brown sugar, cayenne pepper, chili powder, paprika, garlic powder, and melted butter; mix well. Top bread slices with cheese and a chicken breast. Generously brush chicken with spice mixture and place back in oven for 2 to 3 minutes to melt cheese. Remove from oven, top with pickle slices, and serve.
****When it comes to selecting the chicken, we liked a buttermilk breaded variety, but you can use whatever floats your boat. Prefer batter dipped tenders? Go for it!
HOW TO OBSERVE
- Look for a community garden in your area.
- Organize a seed and perennial plant swap with neighbors and friends.
- Join a garden club. There isn’t one near? Start one!
- Visit your local nursery or garden center—you will be amazed and excited by all the beautiful options
1 comment:
Happy, happy Gardening Day!
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