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Consider the following statements regarding the Radiative cooling:
- It is a passive cooling technology without any significant energy consumption.
- It can be used to manufacture paints that are engineered to cool structures like buildings.
Which of the statements given above is/are correct?
- a)1 only
- b)2 only
- c)Both 1 and 2
- d)Neither 1 nor 2
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Consider the following statements regarding the Radiative cooling: It ...
Researchers from Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) have developed a radiative cooling paint, which is specifically engineered to cool structures like buildings, pavers, and tiles in hot weather conditions.
- It is developed from a novel MgO-PVDF polymer nanocomposite.
- They used ultra-white and ultra-emissive magnesium oxide (MgO)-polyvinylidene fluoride (PVDF) nano-composite prepared from materials that are earth abundant, cheap, non-toxic and non-harmful.
- The optimized MgO-PVDF with a dielectric nanoparticles resulted in large solar reflectance of 96.3% and a record high thermal emission of 98.5% due to Mg─O bond vibrations, and other stretching/bonding vibrations from the polymer.
- The researchers developed polymer nanocomposite paint by using a simple solution-processed technique.
- By measuring the temperature of the paint using a thermocouple, excellent cooling performance was demonstrated under hot sunlight.
- The nanocomposite paint exhibited water-resistant hydrophobic properties and can be easily coated on pavers, wood sticks and so on with high uniformity and good adhesion.
- The surface temperature of a treated paver decreases by approximately 10°C under intense sunlight-- almost double of the reduction that conventional white paints give.
- This low-cost, solution-processed paint demonstrates significant cooling capabilities with a high solar reflectivity and infrared thermal emissivity.
What is Radiative cooling?
- It is a passive cooling technology without any energy consumption, compared to conventional cooling technologies that require power sources and dump waste heat into the surroundings.
Hence both statements are correct.
Most Upvoted Answer
Consider the following statements regarding the Radiative cooling: It ...
Radiative Cooling
Radiative cooling is a passive cooling technology that uses the property of thermal radiation to cool surfaces without the need for any significant energy consumption. It involves the emission of thermal radiation from a surface to the atmosphere, which allows the surface to cool down by dissipating heat into space. This process is particularly effective at night when the atmosphere is cooler than the surface being cooled.
Statement 1: It is a passive cooling technology without any significant energy consumption.
This statement is correct. Radiative cooling is a passive cooling technology that does not require any active energy input. It relies on the natural process of thermal radiation to cool surfaces. During the day, when the surface temperature is higher than the atmospheric temperature, heat is radiated from the surface to the cooler atmosphere. At night, when the atmospheric temperature is lower, heat is radiated from the surface into space. This process does not require any additional energy consumption, making it an energy-efficient cooling method.
Statement 2: It can be used to manufacture paints that are engineered to cool structures like buildings.
This statement is also correct. Radiative cooling technology can be applied to the manufacturing of paints and coatings that are designed to have high reflectivity in the infrared spectrum. These paints are commonly referred to as "cool paints" or "cool coatings". They are formulated to reflect a significant portion of the solar radiation, including infrared radiation, thereby reducing the amount of heat absorbed by the surface.
Cool paints typically have a high solar reflectance (visible light reflectivity) and a high thermal emittance (ability to radiate heat). This combination allows the paint to reflect a large portion of the incident solar radiation and efficiently radiate the absorbed heat back into space, resulting in lower surface temperatures. By using cool paints on buildings, the heat load on the building can be reduced, leading to energy savings and improved comfort indoors.
Conclusion
In conclusion, both statements regarding radiative cooling are correct. It is a passive cooling technology that does not require significant energy consumption, and it can be used in the manufacturing of paints that are engineered to cool structures like buildings.
Radiative cooling is a passive cooling technology that uses the property of thermal radiation to cool surfaces without the need for any significant energy consumption. It involves the emission of thermal radiation from a surface to the atmosphere, which allows the surface to cool down by dissipating heat into space. This process is particularly effective at night when the atmosphere is cooler than the surface being cooled.
Statement 1: It is a passive cooling technology without any significant energy consumption.
This statement is correct. Radiative cooling is a passive cooling technology that does not require any active energy input. It relies on the natural process of thermal radiation to cool surfaces. During the day, when the surface temperature is higher than the atmospheric temperature, heat is radiated from the surface to the cooler atmosphere. At night, when the atmospheric temperature is lower, heat is radiated from the surface into space. This process does not require any additional energy consumption, making it an energy-efficient cooling method.
Statement 2: It can be used to manufacture paints that are engineered to cool structures like buildings.
This statement is also correct. Radiative cooling technology can be applied to the manufacturing of paints and coatings that are designed to have high reflectivity in the infrared spectrum. These paints are commonly referred to as "cool paints" or "cool coatings". They are formulated to reflect a significant portion of the solar radiation, including infrared radiation, thereby reducing the amount of heat absorbed by the surface.
Cool paints typically have a high solar reflectance (visible light reflectivity) and a high thermal emittance (ability to radiate heat). This combination allows the paint to reflect a large portion of the incident solar radiation and efficiently radiate the absorbed heat back into space, resulting in lower surface temperatures. By using cool paints on buildings, the heat load on the building can be reduced, leading to energy savings and improved comfort indoors.
Conclusion
In conclusion, both statements regarding radiative cooling are correct. It is a passive cooling technology that does not require significant energy consumption, and it can be used in the manufacturing of paints that are engineered to cool structures like buildings.
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Consider the following statements regarding the Radiative cooling: It is a passive cooling technology without any significant energy consumption. It can be used to manufacture paints that are engineered to cool structures like buildings.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer?
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Solutions for Consider the following statements regarding the Radiative cooling: It is a passive cooling technology without any significant energy consumption. It can be used to manufacture paints that are engineered to cool structures like buildings.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for UPSC.
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