Refrigerators

Modern electric fridges are cooled by the evaporation of a low boiling point liquid. The resulting gas is then compressed and cooled (in the fins at the back of the fridge) to condense it back to a liquid. It then goes through the cycle again and again. See link to animated drawing for details. The liquid/gas used in fridges manufactured before the mid 1980s was genereally a CFC (Chloroflourocarbon) but these were banned under the Montreal treaty in 1989 due to their damaging effect on the ozone layer. Currently they have been largely replaced by HCFC in modern fridges but HCFCs although not harmful to the ozone layer are powerful global warming gasses. Their use is due to be banned by 2030 if not sooner.
D - Absorption of the heat from the air due to evaporation of the liquid refrigerant.

The average shipping weight of a refrigerator is typically between 200-300 pounds, depending on the size and model of the refrigerator. This weight includes packaging materials and is necessary to protect the appliance during transport.

The aluminum material of the soda can is a conductor of heat, so it quickly absorbs the cold temperature from the refrigerator. When you touch the soda can, the coldness is transferred to your hand through conduction, making it feel cold to the touch.

The average weight of a refrigerator can vary depending on the size and type of refrigerator. However, a standard refrigerator typically weighs between 200 to 300 pounds.

The bottom of the fridge is typically colder because the cooling unit (evaporator coil) is often located at the back of the fridge near the bottom. As the cold air is generated, it tends to sink to the lowest point in the fridge, which is why the bottom shelf or drawer tends to be the coldest.

Yes, electromagnets are used in fridges in the form of solenoid coils. These coils create a magnetic field when an electric current is passed through them, allowing the fridge to regulate temperature and control the opening and closing of the doors.

Yes, urine can be stored in the fridge before lab testing. In fact, urine is always supposed to be stored in cooler temperatures for testing. This prevents the growth of bacteria in the urine.

Warmer. A fridge works by transfering heat from inside the fridge to the coils out the back of the fridge. Leaving the door open is the same as pulling water out the bottom of a water cooler and pouring it back in the top. The transfering of heat cancels itself out. The fridge will stay running longer trying to keep the inside cold when the door is left open. This extra running time from the motor is the major source of the added heat to the room.

A thermostat in a refrigerator is used to regulate the temperature inside the fridge. It helps maintain a consistent and optimal temperature to keep food fresh and prevent spoilage. The thermostat controls the compressor, which cools the refrigerator when the temperature rises above the set level.

Leaving the oven door open to warm a kitchen is not a safe or efficient method. It can lead to heat loss, wasted energy, and potential safety hazards. It is better to use a proper heating source like a heater or a central heating system to warm a kitchen.

It took him about three hours to make the fridge.

The coolant in a refrigerator is typically a gas that circulates through a series of coils. As it flows, it absorbs heat from the interior of the fridge, cooling it down. The absorbed heat is then released outside the fridge as the gas condenses back into a liquid.

Voltmeters are used to measure voltage in electrical circuits, providing information about the potential difference between two points. They are crucial for testing the electrical components of a circuit and ensuring that the correct voltage levels are maintained. With their versatility and accuracy, voltmeters help in diagnosing voltage-related issues and ensuring proper functioning of electrical systems.

Carl Paul Gottfried Linde, a German engineer, invented the refrigerator by developing the first practical and reliable method for liquefying gases on a large scale in the 1870s. This technique allowed for the production of artificial cooling agents, which formed the basis for the modern refrigeration cycle used in refrigerators today.

The temperature that mercury needs to be to solidify is -38.02 degrees fahrenheit.

I'm taking this to mean "how do refrigerators work?" A refrigerator (or fridge) is a heat exchanger attached to an insulated chamber; it removes heat from the chamber and pumps it outside. The rear of a refrigerator has plates which feel warm - this is the removed heat being released. To understand how a heat exchanger works, recall how cold you feel after getting out of a warm bath or pool; the cooling is caused by the water evaporating. Heat exchangers use a similar principle but with a coolant which boils at a low temperature. The coolant is pumped through two coils in the fridge; a condenser coil which is exposed to the outside air and an evaporator coil which is exposed to the air in the insulated chamber. As the coolant is compressed into a liquid in the condenser heat is released to the outside, in the evaporator the coolant evaporates - absorbing heat from the insulated chamber. A problem with fridges is that the coolant has usually been freon (a CFC), nowadays liquid propane gas is starting to gain favour.

No, James Harrison did not invent the refrigerator. The first practical and successful refrigerator was created by Oliver Evans in the early 1800s. Harrison did, however, contribute to the development of refrigeration technology with his work on the first refrigeration system for breweries.

Because, refrigerators do not produce cold. The system is like that of an air-conditioner. The freon in the cooling lines absorbs the heat and is then pumped to the back of the refrigerator where the heat dissipates into the surrounding air and the freon is pumped back into the refrigerator to repeat the task again. So, any heat removed from the air would just be released into the air on the other side of the fridge. that is why the heat dissipation side of air conditioners is outside.

P.S. Cold can not be generated cold is the absence of heat. Hence the existence of absolute zero. To cool you transfer heat from one place to another.

"Eutectic" refers to a mixture or alloy that has the lowest possible melting / freezing point. In a true eutectic solution, all its consituents move from solid state to liquid and vice versa simultaniously as in water. The "eutectic point" is thus the freezing / melting point of the whole solution. The term "eutectic fridge" refers to a fridge that has an internal tank filled with a eutectic solution. The fridge works normally with a compressor and coolant gas, the eutectic solution is not circulated through the evaporator. When the fridge is running, it pulls down the temperature of the eutectic tank solution, which then helps keeping the temperature low even when the fridge is not running. A poor man's eutectic would be putting a lot of bottled water in your fridge and then run the fridge until all the water is cold. Now the cold liquid helps keeping down the temperature, while cold air escapes as soon as you open the door. Eutectic fridges are often used in vehicles and boats that must be self-sufficient with their electricity. The "eutectic plate" is chilled while there is plenty of power (=the engine is running, or the sun hits the solar panels etc. ), thus enabling the user to save power at times when no charge is coming to the batteries.

Water evaporates slowly in a fridge because the fridge is typically kept at a lower temperature, which reduces the energy available for water molecules to escape into the air. Additionally, the fridge is designed to be sealed, limiting air circulation and slowing down the evaporation process.

Refrigerators work by removing heat from the interior through a refrigeration cycle. A refrigerant is pumped through a series of coils, where it absorbs heat from the inside of the fridge and releases it outside. This process keeps the interior of the fridge cool.

A heat mover is a device or system that transfers heat from one location to another. This can involve removing heat from a space to cool it down (such as in air conditioning systems) or transferring heat to a space to warm it up (such as in heat pumps).

If I understand the question correctly, the answer may be like this. a refrigerator compressor is made up of two shells-- the upper one and the lower one. they are welded together. they are called as hermetically sealed comprssors meaning the seal is airtight. Internally, they may operate on reciprocating or rotary principle. internaly, there is a oilcooled elecric motor. on the shaft of the motor we find the crank, connecting rod and piston for reciprocating type of compressors and for rotary type, it is replaced by eccentric blade/s. the winding wire guage of the electric motor may be called as hermetic guage wires different than the regular electric wire guage.

Freon is the registered name for a number of products containing halocarbons. These refrigerants undergo a process where it condenses into a liquid and evaporates into a solid, losing a substantial amount of heat in the process. Once it's cold enough, the gas is channeled through coils that allow it to absorb heat from the air in the fridge.