what is ultrasound refrigeration?
549531
the cold stuff they put on your tummy to make to ultra sound take pictures
223267
I assume you are talking about a central chiller plant setup. This is common on large campuses. There are a few high capacity centrifical or recepricating compressor water chillers that chill water and it is stored in large tanks to expand system capacity or ofset high peak deman energy costs. The chilled water is sent to buildings and used to cool them in a device not unlike a car radatior.
161386
Probably ultrasonic....
710637
The compressor of your Refrigerator is not designed to keep cool a large space such as your room. So once you keep it open, the compressor will get overloaded and it will be spoiled. Take care.
361656
There are various brands but probably the most common in use in hospitals is AquaSonic (link to company website below.)\n\nThe gel facilitates the transmission of sound waves from the ultrasound probe to (and thence through) the skin. If there is air under the probe, the waves are reflected off it and you can't image the tissue underneath. Even a tiny air bubble will distort the wave/reading. The technical explanation (from Wikipedia):\n\n"Ultrasonography (sonography) uses a probe containing one or more acoustic transducers to send pulses of sound into a material. Whenever a sound wave encounters a material with a different acoustical impedance, part of the sound wave is reflected, which the probe detects as an echo. The time it takes for the echo to travel back to the probe is measured and used to calculate the depth of the tissue interface causing the echo. The greater the difference between acoustic impedances, the larger the echo is. The difference between gases and solids is so great that most of the acoustic energy is reflected, and so imaging of objects beyond that region is not possible."\n\nIt's a water-based gel (probably rather like KY). Most companies have proprietary formulae so I can't say exactly what they're made of. The second link is a rather neat discussion of different types of gel.
1158457
First of all, the "laser" tape measures that they sell at Home Depot are not laser based at all.  They use ultrasonic reflectometry.  The laser is a simple pointer.  The measurement is made by an ultrasonic pulse that reflects off of a flat surface and the distance is calculated by the time it takes from the start of the pulse to the time of return of the reflected pulse.  This time is divided by the speed of sound in air (1130 f/s @ 70 degrees F) to give the distance.  The resolution of these intruments is +/- ~1".
180987
It is the process of disrupting biological materials by use of sound wave energy.\n\nSonication is basically a process by which sound waves are passed through a medium - either directly or indirectly as in a water bath.  We, where I work, use it to quickly dissolve solute in solvent... ie. reagent grade vitamins into Mother, stock and working standard solutions.\n\nThe links below are of Sonicators.
22212
Its bound into a CloroFloroCarbons used in the "Freons"\n\nThe Freons are special molicules that are realitivly safe (Unless your an Ozone layer) and have BOILING points below the temprature you want to achieve.  Basicly There is a pump inside a air conditioner that compresses the gas until it becomes liquid where it gives off its heat *feel the back side of an air conditioner* then it goes through a tiny little tube and boils inside the tubes on the front side of the air conditioner *the one on the back is called a condenser, the one on the Front is called a evaporator based on if the freon is condensing or evaporating in it*
109470
This ain't my forte, but here goes.\n\nAdiabatic expansion is like what my freezer and air conditioner use to cool things off.  They take a pressurized gas and let it expand, which drops its temperature.  Then they let this low-temperature stuff suck up the heat in my Ben & Jerry's or in my house.  If you've ever discharged a CO2 fire extinguisher or used a can of compressed air to clean your computer, the CO2 is so cold it condenses the water in the atmosphere or the air on your computer is very cold.\n\nIsothermal means the temperature stays the same.  So if your gas expanded and it didn't get colder, something else went on to provide the heat to keep the temperature the same.  \n\nMaking heat is work, in physics terminology, so the isothermal expansion required more work than the adiabatic expansion.
484705
Mr. Slim is a split-ductless air-conditioning system. If you are familiar with a central system, you have the basic idea of what a split system is: an outdoor condensing unit and an indoor evaporator unit. The basic difference between the two is that with the central system the evaporator unit is typically found in the attic and has ductwork branched off to the different rooms in your house. With Mr. Slim the evaporator is actually in the room being air-conditioned. The indoor unit has a quiet fan that blows across a cold aluminum coil while in the air-conditioning mode. The indoor unit is usually a wall-mounted type, and this unit is connected directly to the outdoor unit by copper tubing and control and power wiring. In the outdoor unit a compressor cycles refrigerant to and from the indoor and outdoor units, and the room air is cooled or heated based on the direction the refrigerant flows between the two.\n\nMore detailed explanation:\nMr. Slim employs the same mechanical components as any basic air-conditioning system whose interactions cause the process of evaporation to occur. Mr. Slim is a split-ductless design, which simply means the indoor unit is separated from the outdoor unit and is connected by a gas and a liquid refrigerant line. The outdoor unit is considered the hot-side during the air-conditioning process. The cold-side unit is located indoors. In the heating process the compressor reverses this operation, and the heat energy is evaporated in the outdoor unit. Then the indoor unit collects this heat energy while a fan blows air over the indoor coil and distributes the warm air into the room.\n\nAir-conditioning Basics:\nThe process of air-conditioning is dictated by simple physics. Through the evaporation process heat is absorbed by the aluminum fan coil in the indoor evaporator unit and is removed from the room by the gaseous refrigerant. The heated refrigerant (pressured by the compressor) flows into the outdoor unit’s aluminum coils. Here a large fan blows across this coil to discharge the heat energy. The liquid refrigerant is cooled by this process and is cycled back to the indoor unit where a fan blows across it and distributes the cool air into the room.\n\nMost air-conditioning systems have four mechanical components:\n1. a compressor\n2. an expansion valve or metering device\n3. an evaporator coil\n4. a blower\n5. a chemical refrigerant
522180
I do not know but I will guess.  Ultrasound is high frequency sound waves that bounce off atoms (which most machines have receptors in order to "read" and produce a picture).  Mist is created when water molecules have enough kinetic (moving) energy in order to break the energy that keeps water molecules attracted (hydrogen bonds).  The ultrasound must be imparting enough kinetic energy to the water molecules at the top layer of the fountain to allow them to escape the bonds hold them to the other water molecules.  Sounds cool.
1128521
gas cools down if it expands suddenly.\n\nsimilar principle is used in AC and refrigerators.
440412
It is generally a good idea to refrigerate all antibiotics in ampules or pills if the temperature is likely to get above 30 deg C. It can do no harm and greatly increases shelf life for most medications.
162237
Most refrigerators use a refrigerant that evaporates to remove heat then recompresses the refrigerent and removes heat (outside) to condense it and repeat the cycle.  Perhaps you could use your weight in the heels of your shoes to recompress the refrigerant.  Also check the ammonia refrigerant process which uses the absorbtion of heat, however, breathing an amonia leak could quickly end your project.  Also study the thermocouple (thermocouple pile) effect that can be used to reject heat, however you might have to do a lot of work just to carry the pile around.\n\nOf course, we all use our own body heat to cool us on a very hot day.  Sweat forms on our skin and evaporation carrys away the latent heat of evaporation from our skin.  You could use artificial sweat (water or a mist of water) and circulating air to remove heat, however, that may not be very effective on a humid day and a suit may actually trap excess heat which we constantly lose by radiation when skin temperature is higher than ambient.  Good luck.
500828
Commercial refrigerators are designed to maintain an interior cabinet temperature between 36 and 40°F while freezers maintain temperatures between -2 and 2°F.
751183
A refrigerator (often called a "fridge" for short) is an appliance for the storage and preservation of perishable food; food kept in a refrigerator lasts longer than that left at room temperature as the cold inhibits bacterial growth. A refrigerator maintains a cold temperature above the freezing point of water; commonly refrigerators are used in conjunction with freezers, which maintain temperatures below freezing, or a refrigerator may have an integrated freezer compartment. The refrigerator is a relatively modern invention amongst kitchen appliances. It replaced the common icebox which had been a household item for almost a century and a half prior, and is sometimes still called by the name "icebox".\n\nCommercial units, which go by many other names, were in use for almost 40 years prior to the common home models. The fact that they operated with toxic ammonia gas systems made them unsafe for home use. Practical household refrigerators were introduced in the 1920s and gained wider acceptance in the 1930s as prices fell and non-toxic, nonflammable synthetic refrigerants, such as Freon or R-12 refrigerants were introduced.\n\nthe advantages and disadvantages u can look straight to my source... it has many information... i hope this helps... good luck ^^
875287
A "ton of refrigeration" is defined as the cooling power of one short ton (2000 pounds or 907 kilograms) of ice melting in a 24-hour period. This is equal to 12,000 BTU per hour, or 3517 watts [2]. Single-family residential "central air" systems are usually from 2 to 5 tons (3 to 20 kW) in capacity.\nVR