What is the air leakage rate of the rotating heat exchanger and how to calculate it?

Air leakage rate of rotary heat exchanger
The air leakage rate of a rotary heat exchanger refers to the percentage of enthalpy loss in fresh air due to mixing of fresh air and exhaust air caused by loose sealing during the operation of the rotary heat exchanger.
1. Calculation method of air leakage rate
The air leakage rate of the rotary heat exchanger can be calculated by the following formula:
Air leakage rate = (1-ε)100%
in:
ε: heat transfer efficiency
2. Factors affecting air leakage rate
The air leakage rate of the rotary heat exchanger is affected by the following factors:
Clearance between the rotor and the seal
Seal material
Seal aging degree
Rotor speed
Filter clogging degree
Temperature difference
3. The harm of air leakage rate
The air leakage rate of the rotary heat exchanger will reduce the heat exchange efficiency, increase energy consumption and affect the indoor air quality.
4. Measures to reduce air leakage rate
Reduce the wheel speed
Regular inspection and maintenance of seals
Clean the filter
Reduce temperature difference
5. Typical air leakage rate
The air leakage rate of the rotary heat exchanger is generally between 5% and 15%, but it may be higher.