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Refrigerater and Food Preservation

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Justin Hooker

on 17 October 2015

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Transcript of Refrigerater and Food Preservation

How is it Media?
Refrigerator and Food Preservation
If you lived before the refrigerator how would you preserve your food?

What made you high class in the 1800's?
How would you differ the elite class from the middle class?
How Does it Work?
Why Does Food Spoil?
Bacterial Growth
Cold Temperatures
slows growth
Frozen Temperatures
stops growth
air tight
polyurethane foam
Energy Consumption
30% of household energy
Chinese in 1,000 BC
Egyptians in 500 BC
Many generations of humans have done it
The Cool Future of Refrigeration
Spoiled food, Bacteria and Preservation
Chilled Drinks!
-Chilled drinks were an obvious sign of a high class individual

-This created a culture

-A particular pair of wealthy brothers joked about the envious colonists at the West Indies that were probably dying for a cold drink
Not everyone had ice...
Without ice, people had to get creative with the way they manipulated time
It took a lot longer than we all thought
Drying meats
Salting Meats
Smoking Meats
Modern Refrigeration
Invention of the Refrigerator
1834 - First working vapor-compression refrigeration system
1854 - First commercial ice-making machine
1913 - Refrigerators for home use
1923 - First self-contained unit by Frigidaire
What changes can we expect?

What are the macro benefits?

What are the micro benefits?

Will fridges become obsolete for food preservation?

What Changes Can We Expect?

Magnetic Cooling
Haier recently released a working prototype that utilizes magnetic fields for cooling.
Magnets? But How?!
Let's take a closer look at the science.
Energy Consumption
How Will This Affect the W rld?
Magnetic fridges will use up to 35 percent less energy to run.

This could dramatically reduce household and commercial energy consumption.
Greenhouse Gasses
By eliminating the traditional compressor and using water based fluids, fridges will no longer release hydrofluorocarbons into the atmosphere.
This means that refrigerators will finally cease their contribution to the slow inevitable end of mankind. So that's nice!
How Will This Affect Me?
With lower power consumption, you could see a drop in your energy bill.
The cost of running multiple fridges will be reduced, which means you can finally have that beer fridge you've always wanted.
Magnetic fridges are extremely quiet.

No longer will you be driven to madness
by the incessant humming of fridges at
But Wait.

Businesses and refrigeration
Household Refrigeration
Will the future even need fridges to preserve food?
A Fridgeless Future for Food?

Into the light:
Researchers at the National University of Singapore are currently attempting to use LED lights to stave off bacteria.

In theory, these lights could be used to kill off food borne bacteria without damaging the food with harsh chemicals.

Though the technology is still in its earliest stages, the future of food preservation is looking pretty
A Quick Review of How it Works
Magnets move back and forth around special magnetically activated materials.
Process was invented in 1784
First inventor Oliver Evans in 1805
Jacob Perkins made practical improvements in 1834
Over 3,000 patents for refrigerators by 1880
Iceboxes used to keep food cool
The push and pull of the magnet causes these magnetic materials to heat and cool water based fluids.

Heat is vented out, while the cooler fluid keeps the inside chilled.
When Was The Refrigerator Invented?
When invented in 1834 people did not buy them
Invention threatened the ice industry
Refrigerators were poisonous due to toxic gas fumes
People began using refrigerators due to ice contamination
Overtime, refrigeration wiped out the ice-box industry
Effects on Society
Raised quality of life at beginning of 20th century
People could consume better foods
Experience a more varied and nutritious diet
Foods lasted longer
Bacteria was not able to grow as fast
Sales of the Refrigerator
Late 1910s a refrigerator sold for $1,600
26 years later for $170
Prime purchase period during 1920s
One of few items in which sales increased during the Great Depression
Full transcript