How runner heat recovery works

Rotary heat recovery is a technology used to improve air quality and energy efficiency in buildings, industries and other applications. Its working principle is based on recovering heat energy from waste air leaving the room and transferring it to fresh air entering the room, thereby saving energy and maintaining a comfortable indoor environment. Here is how rotary heat recovery works:
1. Air supply and exhaust channels: There are usually two channels in a building or system, one for supplying fresh air and the other for exhausting waste air. These two channels are connected by a heat recovery device called a rotor.
2. Wheel: There is a rotating rectangular or round wheel in the heat reclaimer, usually made of hygroscopic material such as silica gel or ceramic. This material can absorb and release moisture. The wheel is divided into two halves, one half is exposed to the supply air channel and the other half is exposed to the exhaust air channel.
3. Heat transfer: The waste indoor air enters one side of the heat recovery device from the exhaust duct and transfers its heat to the hygroscopic material on the wheel. This will cause the hygroscopic material to heat up.
4. Humidity transfer: At the same time, fresh outdoor air enters the other side of the heat recovery device from the air supply channel, passes through the hygroscopic material on the wheel, and absorbs the moisture previously released from the waste air.
5. Heat recovery: As the wheel rotates, both heat and humidity are transferred to the fresh air. In this way, the fresh air is preheated and has some humidity before entering the room. This helps maintain a more comfortable indoor temperature and humidity and reduces the energy demand of the heating and cooling system.
6. Periodic operation: The rotary heat recovery unit usually rotates periodically to ensure efficient transfer of heat and humidity. This rotation can be achieved by a motor or other mechanical device.
In summary, the heat recovery wheel improves the energy efficiency of the building by recovering heat and humidity from the exhaust air leaving the room and transferring them to the fresh air entering the room, while also helping to improve the indoor air quality. This can reduce the load on the heating and cooling systems and reduce energy consumption, thereby saving energy and reducing energy costs.