Models moist air flow in a vehicle heating, ventilation, and air conditioning (HVAC) system. The vehicle cabin is represented as a volume of moist air exchanging heat with the external environment. The moist air flows through a recirculation flap, a blower, an evaporator, a blend door, and a heater before returning to the cabin. The recirculation flap selects flow intake from the cabin or from the external environment. The blender door diverts flow around the heater to control the temperature.

模型调节压力，温度，湿度和臭氧（O3）的飞机环境控制系统（ECS），以保持舒适且安全的客舱环境。冷却和除湿由空气循环机（ACM）提供，其作为逆Brayton循环操作，以从加压热发动机排气中除去热量。一些热漏空气直接与ACM的输出混合以调节温度。通过机舱内的流出阀保持加压。该模型模拟了从热地条件运行到冷巡航条件的ECS，并返回冷地条件。

Model a proton exchange membrane (PEM) fuel cell stack with a custom Simscape™ block. The PEM fuel cell generates electrical power by consuming hydrogen and oxygen and producing water vapor. The custom block represents the membrane electrode assembly (MEA) and is connected two separate moist air networks: one for the anode gas flow and one for the cathode gas flow.

Model a proton exchange membrane (PEM) water electrolyzer with a custom Simscape block. The PEM electrolyzer consumes electrical power to split water into hydrogen and oxygen. The custom block represents the membrane electrode assembly (MEA) and is connected to a thermal liquid network and two separate moist air networks: the thermal liquid network models the water supply, the anode moist air network models the oxygen flow, and the cathode moist air network models the hydrogen flow.

Models a positive-pressure medical ventilator system. A preset flow rate is supplied to the patient. The lungs are modeled with the Translational Mechanical Converter (MA), which converts moist air pressure into translational motion. By setting the Interface cross-sectional area to unity, displacement in the mechanical translational network becomes a proxy for volume, force becomes a proxy for pressure, spring constant becomes a proxy for respiratory elastance, and damping coefficient becomes a proxy for respiratory resistance.

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.

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.