Focus on: (1) Circular Economy model vs Linear Economy, Product Stewardship, and Life Cycle Assessment (LCA); (2) Sustainable Material Sourcing, Embodied Energy, and Decarbonization; (3) Thermodynamics and Energy Efficiency (Modes of heat transfer - Conduction, Convection, Radiation, Bernoulli’s fluid equation in inclined pipes, Thermal engine efficiency); (4) UN Sustainable Development Goals (SDGs) and role of engineers in global sustainability.
Key Points: Draw butterfly circular economy diagram. Linear model produces massive landfill waste and resource depletion. LCA stages: (1) Raw material extraction, (2) Manufacturing/Processing, (3) Distribution & Packaging, (4) Use phase, (5) End-of-life recycling/disposal.
Key Points: Continuity equation: Q = A1*v1 = A2*v2 => v1 = 0.05 / (pi*0.1^2) = 1.59 m/s, v2 = 0.05 / (pi*0.05^2) = 6.37 m/s. Bernoulli: P1/(rho*g) + v1^2/(2g) + z1 = P2/(rho*g) + v2^2/(2g) + z2. Solve for P2 = 242.8 kPa.
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