Advanced Trends in Mechanical Engineering (Volume - 1), edited by Dr. Abhishek Saxena and Dr. Satish Geeri, presents five research-driven chapters that reflect contemporary advancements in thermal systems, manufacturing integration, and energy optimization. Topics include the development of Workstations for Hybrid Additive and Subtractive Processing (WHASPs), fundamentals and applications of aerodynamics, enhancement of water heating systems using Al₂O₃ nanomaterials and PCM, performance improvement in vapor compression refrigeration systems, and the design of PCM-based storage systems for agricultural produce. Blending experimental methodologies with computational design, the volume offers practical insights into hybrid manufacturing, renewable energy utilization, and mechanical system optimization. It is an essential resource for mechanical engineering students, educators, researchers, and professionals focused on sustainable and high-performance technologies.