0
While cooling methods have been used to keep foods fresh throughout history, nothing compares to the invention of the refrigerator, which revolutionized food production and improved health around the world. Food cooling systems can be traced back to before 1000 B.C. Throughout ancient history, cultures devised ways to keep food cold based on their local climates. Caves, cold streams, cellars, streams, and snow were used to keep food cold. Over time, people realized the possibility of cutting chunks of natural ice, protecting it, and using it in wood or straw-lined cellars, caves, and underground chambers for food storage.
At some point in history, humans discovered the fact that the evaporation of salt water brine absorbs heat. With this discovery, food could be stored in smaller containers and placed in brine to keep it cold.
Wiki User
∙ 14y ago
Wiki User
∙ 15y agoImmediately before the electric refrigerator, they had what was referred to as the Ice Box. It was a lined cabinet, or later ones that resembled the refrigerators of the 50s and 60s which had a draw at the bottom where a block of ice was kept (for the cooling of food). Every so often you could hear a wagon (later a truck) roll through the neighborhood with a man yelling out "Ice Man...Ice Man," and those in need of ice would come out and purchase a block.
Add your answer:
Earn +20 pts
Can you use a 30 amp breaker for a refrigerator?
Not unless the wire going to the refrigerator outlet is AWG 10/2. If it is wired with 12/2 wire then you must use a 20 amp breaker. Using a 30 amp breaker is dangerous and a fire hazard.
What diameter wire for refrigerator?
You can wire the refrigerator on a dedicated 15 amp circuit using AWG #14 wire but, know that as of 2014 the refrigerator must be on a GFCI protected circuit that is readily accessible. As you will normally mount the outlet behind the refrigerator you would have to move the unit to reset the breaker if and when it tripped. I would wire the refrigerator on one of the 20 amp kitchen counter-top circuits that is GFCI protected. Now, my answer may be debatable but from how I read the NEC code you can wire it to one of the kitchen branch circuits as long as the refrigerator does not pull more than 16 amps. You might want to check with your local inspector to get his opinion as he is the one who will have the final say.
How much electrical energy is required to cool 580 liters refrigerator capacity?
That doesn't depend only on the volume. It also depends on the quality of the insulation, and on the shape. If the insulation is very good, you can keep the refrigerator cool with minimum effort. And if the shape is such that the surface area is small, less heat will leak back into the refrigerator. The amount of energy also depends on the temperature difference between the temperature desired for the refrigerator and the ambient temperature.
What did people do before electricity was invented?
Electricity wasn't invented; it is a natural phenomenon seen in lightning, the nervous system of every living animal, and so on. Things to make, transmit, store and use electricity were invented. Before those things were invented, people made things that allowed them to live without electricity, such as candles and oil lamps for light, waterwheels and ox drive for powering equipment, fuel-burning stoves for heat, written letters and visits for communications, and so on.
Is household refrigerator an open loop system?
no. feedback is needed to regulate the temperature
What did people use before a refrigerator?
for meat they would salt cure it.....basically just rub salt on it
What people did before the refrigerator was invented?
Before the refrigerator was invented, people used iceboxes, which were essentially big coolers with a block of ice. Even before that, food was preserved by salting, curing, smoking, drying, and canning.
If on its side how long before can use refrigerator?
Overnight, approximately 12 hours.
Where should raw meats be stored?
It should be stored in the refrigerator or freezer. If stored in the refrigerator, be sure to use or freeze before the expiration date.
Is ok to keep the NuvaRing in the freezer?
Yes, it is recommended that you keep Nuva Ring in the refrigerator if you won't use it within four months. You can keep it in the refrigerator, if you prefer, even if you're going to use it before that time.
How do I use shrewdly in a sentence?
She shrewdly covered the cake and put it in the refrigerator before the kids came in from school.
What are refrigerator magnets used for?
Many people have refrigerator magnets on the fridge. Some people use them to hold notes and photos to the fridge. Other people prefer to purchase more decorative refrigerator magnets that they simply enjoy seeing every time they go to the fridge.
What do homeowners use a subzero refrigerator for?
Everything they use a regular refrigerator for. Subzero is a type of refrigerator, but it is also a brand of refrigerator. They are basically what they sound like, a refrigerator/freezer that reaches and hold subzero temperatures.
How many people own refrigerator in India?
85% people have own refrigerator in India.
Before the refrigerator?
Ice box
How do people keep things cold when people like eating ice cream on a hot summers day and you don't have a refrigerator or a house and your family wont let you use their refrigerator?
Buy a cooler and put ice in it.
What is the use of a thermostat in a refrigerator?
The thermostat in the fridge allows one to set how cold it gets before it turns its self of and how warm it gets before it turns its self on.
