The working principle of heat recovery wheel mainly includes the following aspects:
Basic working principle: The heat recovery wheel realizes the exchange of heat and humidity through the rotating heat storage body. The exhaust air in the room is discharged to the outside through the upper part of the wheel, and the fresh air outside enters the room through the lower part of the wheel. In this process, the exhaust air transfers heat and moisture to the heat storage body of the wheel, and the fresh air absorbs these heat and moisture from the heat storage body, thereby realizing preheating and humidification (winter) or precooling and dehumidification (summer).
Energy exchange process: The heat recovery wheel uses the temperature difference and water vapor partial pressure difference between the fresh air and the exhaust air to exchange moisture and heat. The motor drives the wheel to rotate slowly through a chain or belt, and the air passes through the heat storage body at a low speed, thereby realizing efficient energy recovery.
Full heat recovery efficiency: The full heat recovery wheel can not only recover sensible heat (temperature load), but also recover latent heat (humidity load). In China, latent heat load in fresh air accounts for the vast majority (more than 70%), so full heat recovery is particularly important. Full heat recovery efficiency is defined as the weighted average of sensible heat efficiency and latent heat efficiency.
Application scenario: Heat recovery rotors are widely used in air-conditioning systems, especially in situations where efficient energy recovery is required. Due to its efficient energy recovery capability and small size, rotor heat recovery has significant advantages in air-conditioning systems.