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Physical Properties of Refrigerants Video Lecture | Topicwise Question Bank for Mechanical Engineering
FAQs on Physical Properties of Refrigerants Video Lecture - Topicwise Question Bank for Mechanical Engineering
| 1. What are the physical properties of refrigerants? |  |
Ans. The physical properties of refrigerants include boiling point, latent heat of vaporization, specific heat capacity, density, viscosity, and thermal conductivity. These properties determine the efficiency and performance of a refrigeration system.
| 2. How does the boiling point of a refrigerant affect its performance? | |
Ans. The boiling point of a refrigerant determines the temperature at which it changes from a liquid to a vapor. A lower boiling point allows the refrigerant to absorb heat more efficiently, leading to better cooling performance. It also affects the pressure within the system, which is crucial for maintaining the desired temperature.
| 3. Why is the latent heat of vaporization an important property for refrigerants? | |
Ans. The latent heat of vaporization is the amount of heat energy required to change a substance from a liquid to a vapor at its boiling point. For refrigerants, this property determines the amount of heat that can be absorbed during the evaporation process. A higher latent heat of vaporization allows for greater cooling capacity and energy efficiency.
| 4. How does the viscosity of a refrigerant impact the refrigeration system? | |
Ans. Viscosity refers to a fluid's resistance to flow. In refrigeration systems, high viscosity can lead to increased frictional losses, reduced heat transfer, and higher energy consumption. On the other hand, low viscosity allows for smoother flow and improved system performance. Therefore, selecting a refrigerant with an appropriate viscosity is crucial for optimizing system efficiency.
| 5. What is the role of thermal conductivity in refrigerants? | |
Ans. Thermal conductivity is the property that determines how well a substance can conduct heat. For refrigerants, high thermal conductivity is desirable as it allows for efficient heat transfer between the refrigerant and the surroundings. This helps in maintaining the desired cooling temperature and improving the overall performance of the refrigeration system.
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