Sistemi a fluido bifase
Scoprire gli esempi che illustrano la modellazione, il controllo e la simulazione di sistemi a fluido bifase.
Esempi in primo piano
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.
Ciclo di Rankine (turbina a vapore)
Questo esempio modella un sistema di turbina a vapore basato sul ciclo di Rankine. Il ciclo include il surriscaldamento e il risurriscaldamento per prevenire la formazione di condensa rispettivamente nella turbina ad alta pressione e in quella a bassa pressione. Il ciclo include anche la rigenerazione facendo passare il vapore estratto attraverso riscaldatori chiusi dell'acqua di alimentazione per riscaldare l'acqua e migliorare l'efficienza del ciclo.
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.
Risorse didattiche
Termodinamica
Imparare la prima e la seconda legge della termodinamica, calcolare il lavoro, interpretare i diagrammi di stato e analizzare i cicli di refrigerazione.
