研究蒸汽压缩制冷系统与悬浮纳米粒子在低GWP制冷剂的研究
Uma Shankar Prasad1,2, Radhey Shyam Mishra3, Ranadip Kumar Das4
1IIT(ISM), Dhanbad, India. dp16dp.16dp000005@mech.iitism.ac.in.
Environmental science and pollution research international
|November 27, 2023
概括
纳米制冷剂,制冷剂中的纳米颗粒悬浮物,提高了HVAC的效率和性能. 这些先进的流体为开发可持续的供暖,通风和空调系统提供了有希望的解决方案.
科学领域:
- 热力学和热转移热力学
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
背景情况:
- 传统制冷剂因其高的全球变暖潜力 (GWP) 而导致全球变暖.
- 低GWP制冷剂通常会带来安全问题,如毒性和易燃性.
- 制冷剂 (纳米制冷剂) 中的纳米粒子悬浮物正在成为提高HVAC系统性能的解决方案.
研究的目的:
- 综合审查纳米制冷剂在HVAC应用中的潜力.
- 评估纳米制冷剂的机制和组合,以提高效率.
- 通过使用能量和能量分析,用纳米粒子评估低GWP制冷剂.
主要方法:
- 审查关于纳米制冷剂及其应用的现有文献.
- 对各种纳米制冷剂组合的热传递参数和性能预测的分析.
- 使用悬浮纳米颗粒的低GWP制冷剂 (HFO,HC) 的能量和运动分析.
主要成果:
- 纳米制冷剂在HVAC系统性能上显著改善.
- 关键的好处包括压缩机工作量减少和热传递率提高.
- 特定的商业制冷剂 (例如,R-134a,R-290,R-1234yf) 在与纳米粒子结合时显示性能增长.
结论:
- 将纳米粒子集成到制冷剂中提供了一条可行的途径,以提高HVAC系统的效率和可持续性.
- 纳米制冷剂为未来的供暖,通风和空调提供了一个有希望的技术进步.
- 对纳米制冷剂混合物的进一步研究可以加速向环保的HVAC解决方案的过渡.
相关概念视频
Refrigerators and Heat Pumps
2.3K
Refrigerators or heat pumps are heat engines operating in a reverse direction. For a refrigerator, the focus is on removing heat from a specific area, whereas, for a heat pump, the focus is on dumping heat into one particular area. A refrigerator (or heat pump) absorbs heat Qc from the cold reservoir at Kelvin temperature Tc and discards heat Qh to the hot reservoir at Kelvin temperature Th, while work W is done on the engine’s working substance.
A household refrigerator removes heat from...
A household refrigerator removes heat from...
2.3K
Vapor Pressure Lowering
26.7K
The equilibrium vapor pressure of a liquid is the pressure exerted by its gaseous phase when vaporization and condensation are occurring at equal rates:
Dissolving a nonvolatile substance in volatile liquid results in a lowering of the liquid’s vapor pressure. This phenomenon can be explained by considering the effect of added solute molecules on the liquid's vaporization and condensation processes. To vaporize, solvent molecules must be present at the surface of the solution....
Dissolving a nonvolatile substance in volatile liquid results in a lowering of the liquid’s vapor pressure. This phenomenon can be explained by considering the effect of added solute molecules on the liquid's vaporization and condensation processes. To vaporize, solvent molecules must be present at the surface of the solution....
26.7K
Sublimation
745
Sublimation is the direct transformation of a solid to a gaseous state. For instance, at standard pressure and room temperature, solid carbon dioxide sublimes to gaseous carbon dioxide. The phase diagram depicts the conditions required for sublimation. This process occurs at the solid-gas phase boundary and is not observed above the triple point of the substance. The reverse of sublimation is called deposition, where a gaseous substance condenses directly into a solid. Sublimation and...
745
Real Gases: Effects of Intermolecular Forces and Molecular Volume Deriving Van der Waals Equation
34.6K
Thus far, the ideal gas law, PV = nRT, has been applied to a variety of different types of problems, ranging from reaction stoichiometry and empirical and molecular formula problems to determining the density and molar mass of a gas. However, the behavior of a gas is often non-ideal, meaning that the observed relationships between its pressure, volume, and temperature are not accurately described by the gas laws.
34.6K
Vapor Pressure of Fluid
1.3K
The vapor pressure of a fluid is a crucial concept in fluid mechanics, influencing phenomena such as boiling and cavitation. Vapor pressure refers to the pressure exerted by a vapor at a state of thermodynamic equilibrium with its corresponding liquid phase at a specific temperature. It represents the tendency of molecules to escape from the fluid surface into the vapor phase.
When a liquid is placed in a closed container with a small air space, and the space is evacuated, vapor molecules will...
When a liquid is placed in a closed container with a small air space, and the space is evacuated, vapor molecules will...
1.3K
Vapor Pressure
35.0K
When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules move randomly about, they will occasionally collide with the surface of the condensed phase, and in some cases, these collisions will result in the molecules re-entering the condensed phase. The change from the gas phase to the liquid is called condensation. When the rate of condensation becomes equal to the rate of vaporization, neither the amount of the liquid nor the amount of the vapor...
35.0K


