Video Experimental Relacionado

Updated: Nov 30, 2025

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

Published on: October 18, 2017

Nuevos refrigerantes y configuraciones de sistemas para la refrigeración por compresión de vapor

Mark O McLinden¹, Christopher J Seeton², Andy Pearson³

¹Applied Chemicals and Materials Division, National Institute of Standards and Technology, Boulder, CO 80305, USA. mark.mclinden@nist.gov.

Science (New York, N.Y.)

|November 13, 2020

Resumen

Se necesitan refrigerantes respetuosos con el medio ambiente debido al alto potencial de calentamiento global de las opciones actuales. Esta revisión abarca alternativas como las hidrofluoroolefinas (HFO) y los refrigerantes naturales, teniendo en cuenta la seguridad y las compensaciones termodinámicas.

Área de la Ciencia:

La termodinámica
Ciencias del medio ambiente
Ingeniería Química

Sus antecedentes:

Los refrigerantes actuales en los ciclos de compresión de vapor poseen un alto potencial de calentamiento global (PGC).
Esto requiere el desarrollo de alternativas ambientalmente benignas para los equipos de refrigeración.
La seguridad, el impacto ambiental y la eficiencia termodinámica son restricciones clave en la selección de refrigerantes.

Objetivo del estudio:

Para revisar los fundamentos del ciclo de compresión de vapor.
Analizar las limitaciones que impulsan el desarrollo de refrigerantes de próxima generación.
Discutir las opciones de refrigerantes emergentes y las compensaciones asociadas.

Principales métodos:

Revisión de la literatura científica sobre las propiedades y aplicaciones de los refrigerantes.
Análisis de los ciclos termodinámicos y evaluaciones de impacto medioambiental.
Evaluación de las consideraciones de seguridad, incluida la inflamabilidad.

Principales resultados:

Las hidrofluoroolefinas (HFO) y las mezclas de HFO son desarrollos clave, que a menudo presentan una ligera inflamabilidad.
Los refrigerantes naturales (amoniaco, CO2, propano, isobutano) están experimentando un resurgimiento.
Los diseños de sistemas innovadores pueden reducir la carga de refrigerante, ampliando las opciones viables.

Conclusiones:

Equilibrar los beneficios ambientales con la seguridad y el rendimiento es crucial para los nuevos refrigerantes.
Se dispone de una amplia gama de refrigerantes, incluidos HFO y opciones naturales.
Las innovaciones en el diseño de los sistemas desempeñan un papel fundamental para permitir la adopción de refrigerantes sostenibles.

Más Videos Relacionados

Ice Generation and the Heat and Mass Transfer Phenomena of Introducing Water to a Cold Bath of Brine

Ice Generation and the Heat and Mass Transfer Phenomena of Introducing Water to a Cold Bath of Brine

Published on: March 13, 2017

Cryogenic Liquid Jets for High Repetition Rate Discovery Science

Cryogenic Liquid Jets for High Repetition Rate Discovery Science

Published on: May 9, 2020

Videos de Conceptos Relacionados

Refrigerators and Heat Pumps

Refrigerators and Heat Pumps

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...

Vapor Pressure Lowering

Vapor Pressure Lowering

The equilibrium vapor pressure of a liquid is the pressure exerted by its gaseous phase when vaporization and condensation are occurring at equal rates:

Phase Transitions: Vaporization and Condensation

Phase Transitions: Vaporization and Condensation

The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules...

Vapor Pressure

Vapor Pressure

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...

Vapor Pressure of Fluid

Vapor Pressure of Fluid

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...

Sublimation

Sublimation

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...