As a core component in systems such as heat pump air conditioners and industrial chillers, the lifespan of a coaxial heat exchanger directly impacts equipment operational stability and cost-effectiveness. Through engineering practice and failure analysis, Gimleo has summarized five key factors influencing coaxial heat exchanger longevity.

01. Medium Purity and Corrosiveness

Coaxial heat exchangers typically feature an inner copper tube and stainless steel sleeve. If the heat transfer medium contains impurities, chloride ions, or acidic substances, it can easily cause internal wall corrosion. Gimleo data shows that when chloride ion concentration exceeds 50ppm, the copper tube corrosion rate increases more than threefold, leading to pinhole leaks in a short time and directly shortening equipment lifespan.

02. Scaling and Clogging Issues

Calcium and magnesium ions in water tend to precipitate under high temperatures, forming scale that adheres to the inner walls of heat exchange tubes. Gimleo indicates that for every 1mm increase in scale thickness, heat transfer efficiency decreases by 10%-15%. Additionally, this causes localized overheating, weakening the mechanical properties of the tube material and reducing lifespan by 20%-30%.

03. Material Selection Rationality

Different application scenarios have significantly different requirements for heat exchanger materials. For example, high-temperature conditions require high-temperature resistant alloys, while seawater heat exchange demands titanium materials resistant to seawater corrosion. Gimleo case studies show that in industrial wastewater treatment scenarios, mistakenly using ordinary carbon steel instead of duplex steel can reduce heat exchanger lifespan from 5 years to just 1.5 years.

04. Installation and Maintenance Standards

Improper installation practices such as pipeline misalignment or poor sealing can easily cause vibration wear or medium leakage. In daily operation, lacking regular cleaning and inspection also accelerates equipment aging. Gimleo statistics demonstrate that standardized installation and regular maintenance can extend coaxial heat exchanger lifespan by 30%-50%.

05. Operational Condition Fluctuations and Load Impacts

Frequent sudden changes in temperature and pressure, or long-term overload operation, can generate fatigue stress in heat exchanger tubes, leading to cracks. Gimleo simulation experiments confirm that when operational fluctuations exceed 20% of design values, heat exchanger fatigue life decreases by over 40%.