Lheriyana Cygan Alinro
Contents
Introduction
Perkenalkan nama saya Lheriyana Cygan Alinro dengan NPM 2106633576 dari program studi teknik perkapalan, saya merupakan mahasiswa kelas Metode Numerik-04
Resume Pertemuan 1 (26/5/2023)
Pada pertemuan pertama, saya mempelajari bahwa metode numerik merupakan pendekatan yang digunakan untuk menyelesaikan permasalahan matematis yang kompleks dengan menggunakan perhitungan numerik atau angka-angka untuk mendapatkan solusi numerik yang mendekati solusi eksak. Pada matematika, sangat jarang ada hal yang eksak, dicontohkan dengan persamaan x²-1/x-1 dan (x+1)(x-1)/(x-1) jika nilai x=1, namun sebenarnya nilai x=1 tidak menunjukan nilai eksak 1 tetapi hanya mendekati 1. Maka dari itu untuk mendapatkan solusinya kita perlu menggunakan pendekatan agar lebih simple, sehingga kita membutuhkan consciousness untuk mengerjakan problem problem yang ada. Pada pertemuan pertama ini juga Pak DAI menugaskan kepada mahasiswa untuk mendesign tabung 1 liter tabung hydrogen dengan tekanan 8 bar dengan biaya maksimal Rp500.000
Design & Optimization of Pressurized Hydrogen
Objective: Design and Optimization Specification
Capacity: 1 L
Pressure level: 8 bar
Maximum cost: Rp500.000
Week 1 Progress
Optimizing hydrogen storage involves various steps and considerations. Here are some key steps to optimize hydrogen storage
Determine Storage Requirements
Define the specific requirements for your hydrogen storage system, including the desired storage capacity, operating pressure, temperature range, weight constraints, safety considerations, and any other relevant factors.
Evaluate Storage Methods
Explore different hydrogen storage methods, such as compressed gas storage, liquid hydrogen storage, or solid-state storage (e.g., metal hydrides, carbon-based materials). Evaluate the advantages, limitations, and suitability of each method for your application.
Material Selection
Choose materials that provide a balance between cost, weight, strength, and compatibility with hydrogen. Look for lightweight materials with high strength-to-weight ratios, such as high-strength steels, aluminum alloys, or advanced composite materials.
Optimize Storage Vessels
Design the storage vessel to maximize the amount of hydrogen that can be stored efficiently. Consider factors such as vessel shape, volume, material, insulation, and safety features. Perform structural analysis to ensure the vessel can withstand the required pressure and cyclic loading conditions.
Enhance Storage Conditions
Optimize storage conditions to improve the storage capacity and efficiency. Explore the impact of temperature, pressure, and gas purity on hydrogen storage. Investigate strategies for managing temperature and pressure variations to maximize storage performance.
Utilize Catalysts
Introduce suitable catalysts to enhance hydrogen storage and release kinetics. Catalysts can improve the sorption/desorption rates and increase storage capacity. Research catalysts that promote hydrogen interaction with storage materials and enable fast and reversible reactions.
Consider System Integration
Ensure compatibility and efficiency by considering the integration of the hydrogen storage system with the overall hydrogen infrastructure. Evaluate the storage system's compatibility with hydrogen production, delivery, and utilization technologies. Optimize the system for seamless operation within the broader hydrogen ecosystem.
Utilize Modeling and Simulation
Employ modeling and simulation tools to simulate the behavior of the hydrogen storage system. This enables you to evaluate different design configurations, predict performance under various operating conditions, and identify areas for improvement. Use computational models to study hydrogen sorption/desorption kinetics, thermodynamics, and system-level performance.
Conduct Experimental Validation
Perform experimental testing to validate the performance of the optimized storage system. This includes measuring storage capacity, sorption kinetics, cycling stability, and other relevant parameters. Compare experimental results with predicted outcomes to refine the design and improve accuracy.
Continuous Improvement
Embrace a continuous improvement mindset. Monitor advancements in hydrogen storage technologies, materials, and system integration approaches. Stay updated on emerging research and development efforts to identify new optimization opportunities.
Final Report of Hydrogen Storage Optimization
Thickness
import math
def calculate_thickness(volume, pressure): hydrogen_density = 0.08988 # kg/m^3 (density of hydrogen gas at room temperature) molar_mass_h2 = 2.016 # g/mol (molar mass of hydrogen gas) avogadro_constant = 6.02214076e23 # mol^(-1) (Avogadro constant) boltzmann_constant = 1.380649e-23 # J/K (Boltzmann constant) temperature = 298.15 # K (room temperature) liter_to_m3 = 0.001 bar_to_pa = 100000 volume_m3 = volume * liter_to_m3 pressure_pa = pressure * bar_to_pa num_moles = (pressure_pa * volume_m3) / (boltzmann_constant * temperature) mass_hydrogen_kg = num_moles * molar_mass_h2 / 1000 surface_area_m2 = mass_hydrogen_kg / hydrogen_density radius = math.sqrt(surface_area_m2 / (4 * math.pi)) safety_factor = 1.5 thickness_mm = safety_factor * radius * 1000 return thickness_mm
capacity_liters = 1 pressure_bar = 8
thickness = calculate_thickness(capacity_liters, pressure_bar)
print(f"The optimized thickness of the stainless steel hydrogen storage is approximately {thickness} mm.")
Optimized thickness: 0.1 mm
Minimal ketebalan yang dibutuhkan adalah 0.1 mm
Height and Diameter
import math
def calculate_surface_area(radius, height): base_area = math.pi * radius**2 lateral_area = 2 * math.pi * radius * height surface_area = 2 * base_area + lateral_area
return surface_area
def find_optimal_dimensions(volume, pressure, tensile_strength): volume_cm3 = volume
pressure_pa = pressure * 100000
optimal_radius = None
optimal_height = None
min_surface_area = float('inf')
for radius in range(1, int(math.sqrt(volume_cm3 / math.pi)) + 1):
height = volume_cm3 / (math.pi * radius**2)
surface_area = calculate_surface_area(radius, height)
if surface_area < min_surface_area:
min_surface_area = surface_area
optimal_radius = radius
optimal_height = height
optimal_radius_cm = optimal_radius
return optimal_radius_cm, optimal_height
volume = 1000 # 1 liter = 1000 mL pressure = 8 # bar tensile_strength = 600 # MPa
optimal_radius_cm, optimal_height = find_optimal_dimensions(volume, pressure, tensile_strength)
print(f"Dimensi yang menghasilkan luas permukaan terendah untuk tabung 1 liter dengan tekanan 8 bar:")
print(f"Radius: {optimal_radius_cm} cm")
print(f"Tinggi: {optimal_height} cm")
Dimensi yang menghasilkan luas permukaan terendah untuk tabung 1 liter dengan tekanan 8 bar: Radius: 5 cm Tinggi: 12.732395447351626 cm
Surface Area
import math
def calculate_surface_area(height, diameter, thickness): mm_to_m = 0.001
height_m = height * mm_to_m diameter_m = diameter * mm_to_m thickness_m = thickness * mm_to_m
radius = diameter_m / 2
external_area = 2 * math.pi * radius * (height_m + thickness_m)
internal_area = 2 * math.pi * (radius - thickness_m) * height_m
surface_area = external_area + internal_area
surface_area_mm2 = surface_area * (1e6)
return surface_area_mm2
height = 127.3239 diameter = 50 thickness = 3
surface_area = calculate_surface_area(height, diameter, thickness)
print(f"The surface area of the stainless steel hydrogen storage container is approximately {surface_area:.2f} square millimeters.")
The surface area of the stainless steel hydrogen storage container is approximately 38071.22 square millimeters = 380.71 square centimeters
Cost Analysis
Harga material plat stainless steel 304 per cm persegi dengan tebal 3 mm (sumber lazada) adalah Rp.196
Maka harga untuk plat stainless steel 304 dengan luas 380.7122 cm persegi adalah Rp74.619,00
