**7. Conclusions**

This research utilized a hybrid particle swarm optimization approach to design a gas cyclone with design parameters at a low cost. When compared to PSO individually, as shown in Table 14, the adoption of a hybridised particle swarm optimization technique produced a lower cost of 230 naira/s, while the use of DE had a cost value of 218.938 naira/s. Inthisresearch,itcanbeconcludedthat:


**Author Contributions:** Conceptualization, X.S. and D.C.I.; methodology, D.C.I.; writing—original draft preparation, D.C.I.; writing-review and editing, X.S. and D.C.I.; supervision, X.S. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Conflicts of Interest:** The author declares no conflict of interest.
