The Cold Packing project focused on improving the cooling of piston rod packings (PRP) in reciprocating compressors by using refrigerant instead of cooling water. The refrigerant enhances cooling due to its higher heat transfer coefficient, reduces the temperature of sealing elements, and prolongs their service life by minimizing wear. Implementing this cooling method can lower operating temperatures and improve the overall reliability of the compressor system, leading to fewer failures and reduced maintenance costs. This approach requires minimal modifications, as the existing system can quickly adapt to the refrigerant. Additionally, the refrigerant-based system offers high reliability and flexibility, functioning effectively in various environmental conditions.
Due to their low thermal conductivity, the simulation model showed that PTFE-based sealing elements limit the effectiveness of cooling methods using cooling channels in the PRP casing. Even with advanced cooling methods like refrigerants, the simulations show that the temperature of these seals is not significantly decreased. An alternative cooling method involving cooling the piston rod near the friction contact, such as having a cooling fluid inside the piston rod, showed promising results but requires more complex production. The study lays a foundation for further research on materials, including alternatives to PTFE, to improve heat dissipation and comply with legislative tightening.
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