Ghaisani Khoirunnisa

Introduction

Greetings, everyone! my name is Ghaisani Khoirunnisa, feel free to call me Gisa. I was born in Jakarta on 22th November 2005. During college I lived in a boarding house located in the Kukusan area, Beji, Depok.

Lecture Resume on 26/05/2023

At the first meeting of the "Metode Numerik" course, I gained an understanding about the principles and practical implementation of the Numerical Method in solving mathematical problems using numerical approaches. Complex problems that are difficult to answer analytically using formulas are solved using a mathematical technique known as the Numerical Method. This approach is particularly helpful when dealing with problems without closed form solutions or when using computationally intensive analytical approaches.

The course emphasized the significance of consciousness in recognizing and addressing problems with the goal of finding solutions. Consciousness refers to an individual's cognitive ability to understand the existence of a problem, and to be actively involved in finding solutions or solving the problem.

In one of our class examples, we explored the expression (x^2-1)/(x-1), where substituting x=1 directly resulted in an indeterminate form of 0/0, lacking a consistent or logically defined solution. We then employed alternative methods such as limit calculations or value approximation, which yielded a result of 2. However, it is important to understand that this value is not absolute. Numerical methods are employed to conduct calculations and utilize approaches that generate the closest possible accurate value. It is crucial to acknowledge that these values are not definitive, as absolute truth can only be attributed to God Almighty.

Design & Optimization of Pressurized Hydrogen Storage

To design the hydrogen cylinder, I utilized various resources, including existing tools like ChatGPT. I relied on ChatGPT to gather the necessary information for my design process. Here are the summarized outcomes and findings obtained through interactions and information searches with ChatGPT.

Design and optimize a pressurized hydrogen storage system with the following specifications :

• Storage capacity : 1 liter
• Pressure : 8 bars
• Fee limit : IDR 500,000

First, we need to consider the design and material for the storage vessel. A common choice for hydrogen storage is a high-pressure cylinder made of a composite material, such as carbon fiber. These cylinders are light, durable and able to withstand high pressure. Considering the cost constraint, we will explore options that fit within the specified budget. To achieve this, we can consider the following approaches:

Cylinder Selection : Research and compare different options for hydrogen storage cylinders available in the market. Look for cylinders specifically designed for high-pressure applications and check if they meet the requirements of 1-liter capacity and 8-bar pressure. Consider factors such as material, weight, and cost. Choose a cylinder that offers the best balance between performance and affordability.

Material Optimization : Optimize the material selection for the cylinder while keeping the cost in mind. Look for materials that provide the necessary strength and safety while being cost-effective. Carbon fiber composite cylinders are commonly used for hydrogen storage due to their lightweight nature and high strength. Evaluate different materials and choose the one that fits within the budget.

Supplier Comparison : Reach out to multiple suppliers and request quotations for the selected cylinder. Compare the prices provided by different suppliers and negotiate for the best possible deal. Consider factors like warranty, delivery time, and after-sales support. Choose a reputable supplier that offers a competitive price and meets the requirements.

Safety Considerations : Ensure that the selected cylinder meets safety standards for pressurized hydrogen storage. Check if the cylinder has necessary safety features such as pressure relief valves, burst discs, and proper certifications. Safety should never be compromised, so prioritize cylinders that meet stringent safety requirements.

Cost Optimization : Explore cost optimization techniques such as bulk purchasing or negotiating for a lower price. Consider buying multiple cylinders to leverage volume discounts if applicable. Seek partnerships or collaborations with other stakeholders to share the cost of the system. By optimizing the procurement process, it may be possible to reduce the overall cost within the given budget.

System Integration : Evaluate the overall system requirements and consider any additional components needed for the pressurized hydrogen storage system, such as valves, regulators, and pressure gauges. Research and select cost-effective components that meet the system specifications. Ensure that the cost of these additional components is included in the overall budget.

System Efficiency : Consider system efficiency to optimize the hydrogen storage capacity. Explore options such as advanced compression techniques or thermal management systems that can maximize the amount of hydrogen stored within the 1-liter capacity. This will help to optimize the system's performance and make the most of the available storage space.