We assess the efficiency of two methods of chemical energy storage. I. First, we store the energy as natural gas (methane, CH4) and utilize it via combustion. We assume the following efficiencies: electrolysis 70%, water-gas shift reaction 75%, natural gas storage and circulation 80%, Fischer–Tropsch reaction 80%, combustion 75%. Based on these efficiencies, calculate the efficiency of the total process. II. Secondly, we want to store the energy as hydrogen and utilize it via a fuel cell. We assume the following efficiencies: electrolysis 70%, hydrogen storage and circulation 70%, fuel cell 50%. Calculate the efficiency of the total process. III. Which of the two methods would you choose to use the hydrogen produced during electrolysis?
We assess the efficiency of two methods of chemical energy storage. I. First, we store the energy as natural gas (methane, CH4) and utilize it via combustion. We assume the following efficiencies: electrolysis 70%, water-gas shift reaction 75%, natural gas storage and circulation 80%, Fischer–Tropsch reaction 80%, combustion 75%. Based on these efficiencies, calculate the efficiency of the total process. II. Secondly, we want to store the energy as hydrogen and utilize it via a fuel cell. We assume the following efficiencies: electrolysis 70%, hydrogen storage and circulation 70%, fuel cell 50%. Calculate the efficiency of the total process. III. Which of the two methods would you choose to use the hydrogen produced during electrolysis?
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Engineering Related problems:
We assess the efficiency of two methods of chemical energy storage.
I. First, we store the energy as natural gas (methane, CH4) and utilize it via combustion. We assume the
following efficiencies: electrolysis 70%, water-gas shift reaction 75%, natural gas storage and
circulation 80%, Fischer–Tropsch reaction 80%, combustion 75%. Based on these efficiencies, calculate
the efficiency of the total process.
II. Secondly, we want to store the energy as hydrogen and utilize it via a fuel cell. We assume the
following efficiencies: electrolysis 70%, hydrogen storage and circulation 70%, fuel cell 50%. Calculate
the efficiency of the total process.
III. Which of the two methods would you choose to use the hydrogen produced during electrolysis?
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