湿空气系统
浏览关于湿空气系统建模、控制和仿真的示例。
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车辆暖通空调系统
该示例对车辆暖通空调 (HVAC) 系统中的湿空气流动进行建模。车辆座舱表示为与外部环境交换热量的湿空气体积。湿空气流经再循环风门、鼓风机、蒸发器、混合门和加热器，然后返回座舱。再循环风门选择从座舱或外部环境流动进气。混合门引导加热器周围的气流来控制温度。
飞机环境控制系统
此示例对飞机环境控制系统 (ECS) 进行建模，该系统可调节压力、温度、湿度和臭氧 (O3)，以维持舒适安全的机舱环境。空气循环机 (ACM) 提供冷却和除湿，该循环机以逆布雷顿循环方式工作，以去除增压热发动机引气中的热量。一些热引气直接与 ACM 的输出混合以调节温度。机舱内的出流阀负责维持增压状态。此模型模拟 ECS 从热的地面状态到冷的巡航条件再回到冷的地面状态的运行。
PEM 燃料电池系统
此示例展示如何使用自定义 Simscape™ 模块对质子交换膜 (PEM) 燃料电池电堆进行建模。PEM 燃料电池通过消耗氢气和氧气并产生水蒸气来发电。该自定义模块代表膜电极组件 (MEA)，并连接两个独立的湿空气网络：一个用于阳极气体流，一个用于阴极气体流。
PEM 电解系统
此示例展示如何使用自定义 Simscape™ 模块对质子交换膜 (PEM) 水电解槽进行建模。PEM 电解槽消耗电能将水分解成氢气和氧气。该自定义模块代表膜电极组件 (MEA)，并连接到一个热液体网络和两个独立的湿空气网络：热液体网络对供水进行建模，阳极湿空气网络对氧气流进行建模，阴极湿空气网络对氢气流进行建模。
带有肺模型的医用呼吸机
此示例对正压医用呼吸机系统进行建模。向患者提供预设流量。肺部使用平移机械转换器 (MA) 建模，该转换器将湿空气压力转换为平移运动。通过将接口横截面积设为单位值，机械平移网络中的位移代替了体积，力代替了压力，弹簧常数代替了呼吸弹性，阻尼系数代替了呼吸阻力。
Oxygen Concentrator
Models an oxygen concentrator device coupled to a lung model. One of the two sieves filters out nitrogen from the air to produce concentrated oxygen in the product tank. The two sieves switches periodically so that while one sieve is filtering, the other can purge the adsorbed nitrogen. When the lung model inhales, some of the oxygen-rich gas from the product tank is mixed into the inspiratory flow.
Pneumatic Actuator with Humidity
How the Simscape™ Foundation Library moist air components can be used to model a pneumatic actuator operating in a humid environment. The Directional Valve is a subsystem composed of four Variable Local Restriction (MA) blocks, and the Double-Acting Actuator is a subsystem composed of two Translational Mechanical Converter (MA) blocks in opposite mechanical orientation.
Pipe Flow with Entrained Water Droplets
Model water droplets that are entrained in a moist air flow. When water vapor condenses in a moist air block, the condensate can become entrained in the moist air flow as small suspended water droplets or ice crystals. In real world systems this can appear as fog. The moist air blocks assume the droplets are small aerosol particles, and take up negligible space. Thus water droplets do not contribute to the specific volume or density of the moist air flow. Furthermore, water droplets are assumed not to affect moist air transport properties such as dynamic viscosity and thermal conductivity. However, water droplets do contribute to the enthalpy and thermal mass of the moist air flow and can therefore affect the temperature variation of the flow. In addition, water droplets can evaporate back into the moist air flow downstream when the relative humidity drops back below saturation. The latent heat for re-evaporation is absorbed from the moist air flow which lowers the moist air temperature.
