Ahmad Fawwazh

hai saya fawwazh

Tugas Besar: Tugas Besar Ahmad Fawwazh

SKE Minggu Ke-

ChatGPT Design a small-scale hydraulic lifting system for a warehouse application, such as a hydraulic lift for moving heavy pallets between two levels. This system will utilize a hydraulic cylinder powered by a pump, converting hydraulic energy into mechanical lifting force.

Design Objective:

• Design a hydraulic lift capable of lifting a 1000 kg load (including the platform weight).
• The lift height is 3 meters.
• The system should operate with a safety factor of 1.5.
• The hydraulic fluid used has a density of 850 kg/m3.
• The pump efficiency is 90%.
• The hydraulic cylinder efficiency is 95%.

Design Steps Using the DAI5 Method:

1. Deep Awareness of "I"

• As a problem solver, I am responsible for designing a safe, efficient, and cost-effective hydraulic lifting system while ensuring safety, reliability, and sustainability.
• The design must prioritize the safety of users and consider real-world applications in a warehouse environment.

2. Intention

• My goal is to design a small-scale hydraulic lifting system that meets the following objectives:
  • Lift a load of 1000 kg, including the platform weight.
  • Achieve a lift height of 3 meters.
  • Ensure a safety factor of 1.5.
  • Use the provided hydraulic fluid (density: 850 kg/m³) and account for the efficiencies of the pump (90%) and hydraulic cylinder (95%).

3. Initial Thinking About the Problem

We need to calculate the following key parameters for the system:

• Force required to lift the load with a safety factor.
• Hydraulic pressure needed in the system.
• Hydraulic cylinder dimensions (e.g., diameter).
• Pump power to achieve the lift.

4. Idealization

Let's assume:

• Hydraulic force requirement:
  • A vertical hydraulic cylinder is used.
  • No significant fluid losses aside from pump and cylinder efficiencies.
  • The load is uniformly distributed.
  • Smooth operation, ignoring dynamic effects (acceleration/deceleration).

5. Instruction

- Step 1: Calculate the Total Force (F)

The total force needed to lift the load is given by:

F = m × g × Safety Factor

Where:

• m = 1000 kg (load including platform weight)
• g = 9.81 m/s²
• Safety Factor = 1.5

F = 1000 × 9.81 × 1.5 = 14,715 N

- Step 2: Determine the Hydraulic Pressure (P)

The pressure in the hydraulic system is:

P = ^F/_A

Where:

• A is the cross-sectional area of the hydraulic cylinder.

Rearranging for A:

A = ^F/_P

Assume a reasonable operating pressure of 20 MPa (20 million Pascals):

A = ^14,715 / _{20 x 10⁶} = 7.3575 x 10^-4 m²

The cylinder radius (r) is:

r = √( ^A / _π ) = √( ^{7.3575 x 10-4} / _π ) = 0.0153 m

The diamter (d) is:

d = 2 x r = 0.0306 m = 30.6 mm

- Step 3: Hydraulic Cylinder Efficiency

Adjust the force to account for the cylinder efficiency (η_c = 95%):

F_actual = ^F / _ηc = ^14,715 / _0.95 = 15,489 N

- Step 4: Hydraulic Pump Power

The hydraulic pump power (P_pump) is given by:

P_pump = ^{(F_actual x v)} / _ηp

Where:

• v = ^{Lift Height} / _{Time Taken} = ³ / ₅ = 0.6 m/s (assumed lift time = 5 seconds)
• η_p = 90%

P_pump = ^{(15,489 x 0.6)} / _0.9 = 10,326 W = 10.33 kW

- Step 5: Final System Design Summary

Hydraulic Cylinder Dimensions:

• Diameter: 30.6 mm
• Operating Pressure: 20MPa

Pump Requirements:

• Power: 10.33 kW
• efficiency: 90%

Hydraulic Cylinder Dimensions:

• Density: 850 kg/m³

This design ensures the lift operates safely, efficiently, and meets the specified requirements.

SKE Minggu Ke-

Evaluation of Conceptual Understanding in Hydraulic and Pneumatic Systems

• Understanding of Basics: 30/30
  • You’ve shown a strong grasp of fundamental principles, such as pressure differences, how hydraulic and pneumatic systems work, and their applications.
  • Bonus points for recognizing the similarities and differences between these systems in terms of medium and usage.

• Application and Analysis: 30/30
  • Your choice of a pick-and-place robot demonstrates your ability to connect concepts to practical, real-world scenarios.
  • Your interest in integrating Machine Learning for quality control indicates forward-thinking, beyond just foundational knowledge.

• Curiosity and Engagement: 20/20
  • Your questions reveal genuine curiosity and a desire to explore the “why” behind mechanisms.
  • Drawing parallels to biological systems and exploring trade-offs reflects creative thinking.

• Room for Refinement: 15/20
  • Consider diving deeper into technical details, such as precise calculations (e.g., force or pressure requirements) or crafting a more concrete design for your project.
  • Utilizing tools like FluidSIM, AutoCAD, or Python for modeling could further enhance your analysis.

Final Score: 95/100

SKE Minggu Ke-

Evaluation of Conceptual Understanding in the First Principle of Energy Conversion

• Conceptual Understanding (95/100)
  • You have a strong grasp of the first principle of energy conversion and the role of entropy in energy systems.
  • Your ability to connect these principles to real-world systems, like renewables and P2X, shows a deep understanding of the core ideas.

• Application to Real-World Problems (85/100)
  • You effectively apply your knowledge to challenges in renewable energy, particularly energy density and storage.
  • Exploring more real-world examples or case studies could further enhance this area.

Final Score: 90/100