전기분해 수소생산 효율과 전해질 농도의 관계

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전기분해 수소생산 효율과 전해질 농도의 관계 및 그로인한 수소전지의 총 효율비교

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Table of Contents

1. ABSTRACT 1

2. TABLE OF CONTENTS 2

3. INTRODUCTION 3

4. BASIC CONCEPTS OF FUEL CELL 4
4.1 DEFINITION OF FUEL CELL 4
4.2 PRINCIPLE OF FUEL CELL (HOW DOES IT WORK?) 4
4.3 CHARACTERISTICS OF FUEL CELL 6

5. RELATED CALCULATION METHODS AND CONCEPTS OF ELECTROLYSIS 6

6. EXPERIMENTS 7
6.1 PRINCIPLE OF METHOD 7
6.2 HYPOTHESIS 8
6.3 DATA COLLECTION AND PROCESSING 8
6.4 PROCESSING AND EXEMPLE CALCULATIONS 9
6.5 EVALUATION 10

7. CONCLUSION 11

8. FURTHER STUDIES 11

9. BIBLIOGRAPHY 12

본문내용

1. Abstract
Water electrolysis is one of the simplest ways of producing useful hydrogen. However, it is the constructing of an efficient and sustainable system that is difficult. An ideal system in practical conditions should be able to yield hydrogen with great efficiency, and be able to do it in industrial quantities. One of the ways of enhancing the efficiency of electrolysis is to determine the critical concentration of electrolyte. An Electrolyte is a salt substance which is dissolved into water in order to have the solution conductible. A set of experiments were carried out on solutions with different concentrations of electrolyte in order to determine the relationship between the concentration of the electrolyte and the hydrogen production. The raw data showed that as the concentration was increased, so did the quantity of hydrogen. Further processing and investigation revealed that the efficiency was also increased as the concentration increased. However, when concentration was increased to more than 0.00355M, the efficiency in fact was decreased. This is due to the relationship of Power = Current x Voltage. This relationship can be used to calculate the input power to the electrolysis system. As concentration of electrolyte increases, current also increases. And due to the above relationship, input energy is also increased. Because efficiency is given by energy output/energy input, the increasing denominator will reduce the efficiency value. It is of this reason that excessive amount of electrolyte can actually decrease the efficiency as opposed to enhancing it. Overall, the investigation came to a successful conclusion meeting the hypothesis that enhancement of efficiency can be done through correct concentration of electrolyte.

참고 자료

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Active Learning of Electrochemical Engineering Principles Using a Solar Panel/Water Electrolyzer/Fuel Cell System by Suzanne S. Fenton, Vijay Ramani, and James M. Fenton, 2006.