Challenges with HVAC
System Degradation
With time, the compressor, evaporator, motor and condenser of a unit degrade and become less efficient. Here’s why:
Oil Fouling of HVAC/R systems heat-transfer surfaces will cause approximate efficiency losses of 7% in year one, 5% in year two and 2% per year the following years. Performance can be degraded by as much as 30% and higher due to the buildup of lubricants on internal surfaces.
Additionally, increased wear and tear due to poor lubrication leads to hotter operating temperatures which in turn accelerate friction and wear and tear. Even though oil fouling is the main problem, there are additional issues related to system performance degradation.
Routine service and maintenance are crucial for the operation and longevity of the HVAC unit but they do not restore the lost capacity inherent with all HVAC-R units.