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Refrigerators
Does the light really go out when we close the door? From the early icebox to the modern built-in frost-free stainless steel double door works of art, refrigerators have improved greatly over the years, and we seldom think about them until they don't work right. From cleaning methods to repairs, this category is the place to get advice and answers to your questions about refrigerators.
3,286 Questions
Why supercooling is used in refrigeration?
Supercooling is used in refrigeration to achieve lower temperatures and increase the efficiency of the cooling process. By cooling a liquid below its freezing point without it solidifying, supercooling allows for more heat to be absorbed from the surroundings when the liquid finally does freeze, resulting in a more effective refrigeration system.
Why do refrigerators have double walls?
Refrigerators have double walls to provide insulation, which helps maintain a consistent temperature inside the fridge. The insulation reduces the amount of heat transfer between the inside and outside of the refrigerator, making it more energy efficient and helping to keep food cold.
What is the difference between azeotropic refrigerant and zeotropic refrigerant?
Azotropic will only have one boiling or condensing point for each system pressure negligible fractionation or temperature glide will occur
Zeotropic will have a range of boiling and condensing points for each system pressure noticeable fractionationand glide will occur.
Why is the condenser on your freezer so hot?
The condenser on your freezer is hot because it is releasing the heat that has been transferred from inside the freezer to the surrounding air. This is a normal part of the refrigeration process and helps maintain the cold temperature inside the freezer.
Why cold air comes from a refrigerator?
Refrigerator Must Open if Used. Despite the model or a technology incorporated of a particular refrigerator, user has to open its doors to store or take out the goods. When the door remains open, warm and moist ambient air will flow in and will mix with the cold air inside the refrigerator. Cold moist air is heavier than ambient air so it drops down from the refrigerator cabin easily while hot ambient air goes in. Since you feel the cool and can see only the due forming, you think that cold air comes out. But actually what happens is hot air jumps first into it and pushes the cold air out from the refrigerator cabin.
Moisture transfer increases with the number of door openings. If the blower fan is turned on, the flow rate of cold air inside the refrigerator cabin will be accelerated, resulting an out flow to the atmosphere through its square area of the opening thus convective and radiative heat transfer increases. You loose 40% energy consumption of a refrigerator due to this.
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Why freezer stops working and fridge still works?
A common reason for the freezer to stop working while the fridge still works is a malfunctioning evaporator fan motor or a problem with the defrost system. This can cause the air circulation in the freezer to be compromised, leading to inadequate cooling. It is recommended to have a professional technician inspect and repair the issue.
What is the purpose of refrigerants in a refrigerator?
- Refrigerants are substances that maintain a cool temperature and circulate cool air. These substances are used in refrigerators and other cooling systems, as well as in home and automobile air conditioning and heating systems. Your refrigerator must have an adequate level of refrigerant to maintain the temperature needed to keep fresh foods cool and freezer items frozen.
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How do you determine when enough vapor entered the refrigeration system?
You can determine when enough vapor has entered the refrigeration system by monitoring the pressure and temperature levels inside the system. As the vapor enters and continues the refrigeration cycle, you can use gauges and thermometers to ensure that the system is operating within the recommended range for optimal performance. Additionally, you can assess the system's cooling capacity and temperature drop to confirm that enough vapor has been introduced.
What is role of CFC in refrigerator?
In refrigerators, CFCs (chlorofluorocarbons) are used as refrigerants to absorb and release heat to help cool the air inside the fridge. However, CFCs have been phased out due to their harmful impact on the ozone layer. They have been replaced by more environmentally friendly refrigerants like HFCs or hydrocarbons.
What is the average power used by a domestic refrigerator in the UK?
The same as anywhere else in the world! The answer depends entirely on the size of the unit. To get some idea of the power used by different household electrical appliances go to any shop which sells them and read the information displayed about each unit.
What percent vapor is refrigerant when entering the evaporator?
Typically, refrigerant entering the evaporator is in a saturated state, meaning it is a mix of liquid and vapor. The exact percentage of vapor will depend on the pressure and temperature conditions at that point.
Why does the gas in the refrigerator cause cooling on expansion?
When the gas in a refrigerator expands, it absorbs heat energy from the surroundings to compensate for the decrease in pressure. This absorption of heat energy results in a decrease in temperature, causing the refrigerator to cool. This process is known as the Joule-Thomson effect.
Why do have to put apple seeds in the refrigerator?
Storing apple seeds in the refrigerator helps to maintain their viability and prolong their shelf life. The cool temperature helps to prevent them from sprouting prematurely and protects them from mold or pests. It also creates a more stable environment for long-term storage if you are not ready to plant them right away.
Why ammonia is used as refrigerant?
Ammonia is used as a refrigerant because it has several physical properties that make it almost ideal for use in many types of refrigeration systems.
- It's pressure is very low when evaporated to produce the temperatures needed for refrigeration.
- It condenses at pressures that are relatively low too.
- it carries much more heat per pound than most other refrigerants, around twice as efficient as HFC's in this respect.
- It is noncorrosive to commonly used metals such as steel, stainless steel, aluminum and bronze.
- It has a pungent odor that is easily detected by the human nose (most people can smell it at around 5 parts per million), leaks are easily detected.
- It is a completely natural occurring chemical, the human body actually produces several grams per day as a normal part of living.
- It has a zero ozone depletion potential, and a zero global warming potential, totally benign to the environment.
Why is a fridge cold on the inside but warm on the outside?
A fridge cools its interior by removing heat from inside and expelling it outside. The warm air that is released during the cooling process accumulates on the external surface of the fridge, making it warm to the touch. This heat exchange is necessary for the fridge to maintain a constant low temperature inside.
How does a fridge door stay shut?
A fridge door stays shut primarily due to the magnetic seal around the edge of the door, which creates a strong enough force to keep it closed. This seal is designed to prevent warm air from entering and cold air from escaping, helping maintain the desired temperature inside the fridge. Additionally, the design of the door itself often includes hinges and a latch mechanism to secure it in place.
Blood should be stored in a refrigerator and maintained at what temperature?
Blood should be stored in a refrigerator and maintained at a temperature between 1 to 6 degrees Celsius. This temperature range helps to preserve the integrity and viability of the blood components for transfusion.
How much does a refrigerator door weigh?
The weight of a refrigerator door can vary depending on the size and material of the door. On average, a refrigerator door can weigh between 15 to 30 pounds.
What in a refrigerator prevents bacteria and fungi to come on the food?
The cold temperature of the refrigerator slows down the growth of bacteria and fungi on food, reducing their ability to multiply and spoil the food quickly. Additionally, the sealed environment of the refrigerator helps to minimize exposure to outside contaminants that could introduce bacteria and fungi to the food. Regular cleaning and maintenance of the refrigerator also help to prevent the buildup of harmful microorganisms.
What happens to the air when you open a refrigerator door?
When you open a refrigerator door, warmer air from the room enters the refrigerator and mixes with the cooler air inside. This can cause the temperature inside the refrigerator to slightly increase as it works to re-establish the set temperature. The refrigerator then expels this warmer air through its coils to maintain the desired temperature.
What would you expect a balloon filled with air if it was put into a refrigerator?
It would get smaller. The gas particles would cool down and contract. And if you put it outside in the sun, the gas particles would heat up and expand. I just learned this in science, so... Hope this helped!
Does a refrigerator have a regular plug?
In USA, Canada - and other countries where a 60 Hz standard electricity supply service is used - small air-conditioning units, intended for mounting below windows, are available for use on regular 110 - 120 volt outlets. They use either up to 1,800 watts or up to 2,400 watts.
A North-American 120 volt receptacle (socket outlet) is a 'duplex' (twin) outlet with a combined rating of 15 amps unless a link arrangement at the back of the receptacle is broken, in which case, the two 'halves' of the receptacle would be supplied from individual 15 amp circuits from the supply panel, allowing 15 A each.
The design of the duplex receptacle is such that the two outlets are arranged vertically. Because of this, both outlets can only be used simultaneously if appliances having cables fitted with "in-line" plugs are used.
If a grounded 3-pin plug with a cable exiting from it at 90-degrees (like British 13 amp plugs) is fitted to the cable of a relatively high-current appliance - such as an air-conditioner unit - then only one such appliance can be used if it is plugged into one of the duplex receptacles because the appliance's cable covers the other receptacle!
For this reason, air-conditioning units are supplied with cables whose plug is at right-angles to the cable (called an 'AC cable') - meaning that only ONE receptacle outlet can be used.
That scheme prevents the duplex outlet from becoming overloaded (i.e. exceeding 15 A).
So, the simple answer is that an AC unit can only be used with a normal 120 volt 15 amp receptacle if it is connected with an AC cable and not a regular cable ("'regular" meaning a cable with an in-line plug). Otherwise, there is the possibility of overloading the receptacle.
To be able to let the sales person know which kind of air-conditioner you want - so that you don't buy a unit that would overload your wiring - before you buy one it is best to find out for sure if the regular outlet you want to plug it into can safely support a continuous current draw of 15 amps - as would be the maximum amperage used by 1,800 watts 120 volt air conditioning units - or 20 amps, as would be the maximum amperage taken by the 2,400 watts 120 volt units.
Safety Warning
If you use one of those small air-conditioners you must take care not to overload the house wiring by using any other large home appliances plugged into other receptacles that are wired into the same circuit.
Using a small electric light, hi-fi unit or television may be ok, but don't try to use a powerful hair dryer or vacuum cleaner at the same time as the air-conditioner is running.
Most likely the resulting current overload would cause the circuit breaker to trip - to cut off the power before anything catches on fire - but it is wiser not to do it!
Note: Large air-conditioners take a lot more power so they can only be used on a 240 volt branch circuit. (It must have the right kind of outlet, wiring and circuit breakers for 240 volts.)
An earlier answer that does not really answer the actual question:
Air-conditioners are devices with higher consumption of electricity
if it is plugged in a normal house plug it will intake large amount of current which will pass through Power Meter and the filament (element) present in it will burn out. (No, it is the house wiring which might catch on fire if the circuit breaker failed to trip to cut off the current.)
This may even affect the internal wire connections..which may cause fire due to electrical sparks.It is highly dangerious to plug it in plug. (???)
If, over the next 7 days, no changes are made to improve the above earlier answer, it will be moved over to the Discussion page.
How would a refrigerator be measured in metric weight?
A refrigerator would typically be measured in kilograms (kg) in terms of weight in the metric system.
Why does a refrigerator start making more noise?
A refrigerator may start making more noise due to issues such as a buildup of dust and debris on the condenser coils, a malfunctioning fan, or a failing compressor. Regular cleaning and maintenance can help prevent excessive noise.
