Use waste heat to create cooling effect

In summary, the conversation discusses the topic of producing cool air using heat. The Electrolux refrigerator, invented by two Swedes, is mentioned as a potential solution as it does not require mechanical input, only a high-temperature source. Kerosene and gas-burning refrigerators are also mentioned as alternatives, but they come with safety risks such as house fires and carbon monoxide poisoning.
  • #1
engineer46
14
0
input heat, output cooled air

Homework Statement


As the title says, I am looking to produce cool air with heat.

Homework Equations





The Attempt at a Solution

 
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  • #2
Your only hope is the gas refrigerator, called the Electrolux refrigerator. It was invented by two Swedes while they were still undergraduates! This refrigerator does not use mechanical input to operate, just a high-temperature source. If 650F is high enough I have no idea.
 
  • #4
If there is one big attraction of electric fridges it's that they kill far fewer people than do the combustion fridges. Kero and gas fridges can cause house fires, and they can also kill people by carbon monoxide poisoning when poorly maintained operation occurs in a confined space (house, caravan, etc.)
 
  • #5


There are several ways in which waste heat can be used to create a cooling effect. One method is through the use of a thermoelectric cooling system, which utilizes the Peltier effect to transfer heat from one side of a thermoelectric module to the other. This allows for the creation of a temperature gradient, with one side becoming cold and the other becoming hot. By placing the cold side in the desired location, cool air can be produced.

Another method is through the use of a heat-powered absorption chiller. This technology uses a heat source, such as waste heat from industrial processes, to drive a refrigeration cycle and produce cool air. This can be a more efficient option for larger cooling applications.

In addition, waste heat can also be used to power a steam turbine, which can then drive a vapor-compression refrigeration cycle to produce cool air. This approach is commonly used in district cooling systems, where waste heat from power plants or industrial processes is used to cool multiple buildings.

Overall, utilizing waste heat to create a cooling effect can be a sustainable and cost-effective solution for cooling needs. By repurposing waste heat, we can reduce energy consumption and mitigate the environmental impact of traditional cooling methods.
 

What is waste heat?

Waste heat is the excess heat produced during industrial processes or by machines that is usually released into the environment as a byproduct. It is often considered as a form of pollution and contributes to global warming.

How can waste heat be used to create a cooling effect?

Waste heat can be used to power a cooling system known as a waste heat recovery system. This system captures the heat energy and uses it to generate chilled water or air, which can then be used for cooling purposes.

What are the benefits of using waste heat for cooling?

Using waste heat for cooling has several benefits, including reducing energy consumption and costs, decreasing the release of harmful pollutants into the environment, and promoting sustainable practices in industries.

What are some examples of waste heat recovery systems?

Examples of waste heat recovery systems include absorption chillers, steam turbines, and organic rankine cycles. These systems can be customized to fit the specific needs of different industries and can be used to produce cooling for various applications.

Are there any challenges associated with using waste heat for cooling?

Some challenges of using waste heat for cooling include the initial cost of implementing a waste heat recovery system, the need for proper maintenance and monitoring, and the potential for system inefficiencies if not designed and operated correctly.

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