Systèmes à fluide diphasique
Explorez des exemples qui illustrent la modélisation, le contrôle et la simulation de systèmes à fluide diphasique.
Sélection d՚exemples
Cavitation in Two-Phase Fluid
How two-phase fluid components can be used to simulate cavitation. The model is a translational mechanical converter driven by an oscillating pressure source. During the negative portion of the pressure source cycle, the fluid cavitates, reducing the force produced by the converter. As a result, the converter displacement drifts and does not return to the starting position.
Fluid Vaporization in Pipe
Model the vaporization of water to generate steam. Liquid water enters the pipe at 370 K at a rate of 1 kg/s. The pipe is heated to 1000 K, causing the water flowing inside pipe to saturate.
Two-Phase Fluid Refrigeration
Models a vapor-compression refrigeration cycle using two-phase fluid components. The compressor drives the R-134a refrigerant through a condenser, an expansion valve, and an evaporator. The hot gas leaving the compressor condenses in the condenser via heat transfer to the environment. The pressure drops as the refrigerant passes through the expansion valve. The drop in pressure lowers the saturation temperature of the refrigerant. This enables it to boil in the evaporator as it absorbs heat from the refrigerator compartment. The refrigerant then returns to the compressor to repeat the cycle. The controller turns the compressor on and off to maintain the refrigerator compartment temperature within a band around the desired temperature.
Cycle de Rankine (turbine à vapeur)
Cet exemple modélise un système de turbine à vapeur basé sur le cycle de Rankine. Le cycle comprend la surchauffe et le réchauffage qui éviteront la condensation au niveau respectivement de la turbine haute pression et de la turbine basse pression. Le cycle comprend également une régénération obtenue en faisant circuler la vapeur extraite à travers des réchauffeurs d'eau d'alimentation fermés pour réchauffer l'eau et améliorer l'efficacité du cycle.
Transcritical CO2 (R744) Refrigeration Cycle
Models a vapor-compression refrigeration cycle in which the high pressure portion of the cycle operates in the supercritical fluid region. The refrigerant is carbon dioxide (CO2), also called R744 in this application.
Calculate Energy Required to Boil Water in the Two-Phase Fluid Domain
Calculate the amount of energy needed to lift the lid of a container filled with water by boiling the water. First, you solve for the solution analytically, and then build a Simscape™ model to represent the physical scenario and validate your results.
Ressources pédagogiques
Thermodynamique
Découvrir la première et la deuxième loi de la thermodynamique, calculer le travail, interpréter les diagrammes d’états et analyser les cycles de réfrigération.
