Mechanical engineering

Mechanical engineering comprises the design, analysis and usage of heat and mechanical power for the operation of machines and mechanical systems.

Subdiscipline	Scope	Major specialties
Acoustical engineering	Concerns the manipulation and control of vibration, especially vibration isolation and the reduction of unwanted sounds
Manufacturing engineering	Concerns dealing with different manufacturing practices and the research and development of systems, processes, machines, tools and equipment.
Thermal engineering	Concerns heating or cooling of processes, equipment, or enclosed environments	Air Conditioning Refrigeration Heating, Ventilating, Air-Conditioningand Refrigerating
Sports engineering	Is a field of engineering that involves the design, development and testing of sport equipment. The equipment used by athletes has always gone through technological design and development based on current knowledge and understanding.
Vehicle engineering	The design, manufacture and operation of the systems and equipment that propel and control vehicles	Automotive engineering, the design, manufacture and operation of motorcycles, automobiles, buses and trucks Naval architecture, the design, construction, operation and support of marine vehicles and structures Aerospace engineering, the application of engineering principles to aerospace systems such as aircraft andspacecraft Marine engineeringoften refers to the engineering of boats, ships, oil rigs and any other marine vessel or structure, but also encompassesoceanographic engineering.
Power plant engineering	Field of engineering that designs, construct and maintains different types of power plants. Serves as the prime mover to produce electricity.	Geothermal power plants Coal-fired power plants Hydroelectric power plants Diesel engine (ICE) power plants Tidal power plants Wind Turbine Power Plants Solar power plants
Energy Engineering	Is a broad field of engineering dealing with energy efficiency, energy services, facility management, plant engineering, environmental compliance and alternative energy technologies. Energy engineering is one of the more recent engineering disciplines to emerge. Energy engineering combines knowledge from the fields of physics, math, and chemistry with economic and environmental engineering practices. Energy engineers apply their skills to increase efficiency and further develop renewable sources of energy. The main job of energy engineers is to find the most efficient and sustainable ways to operate buildings and manufacturing processes. Energy engineers audit the use of energy in those processes and suggest ways to improve the systems. This means suggesting advanced lighting, better insulation, more efficient heating and cooling properties of buildings.[1] Although an energy engineer is concerned about obtaining and using energy in the most environmentally friendly ways, their field is not limited to strictly renewable energy like hydro, solar, biomass, or geothermal. Energy engineers are also employed by the fields of oil and natural gas extraction