Table of Contents
How do you calculate the power of a fuel cell?
Calculating Fuel Cell System Efficiency The standard method for calculating the efficiency of a fuel cell power plant or other electrical generation device is to divide the electricity produced by the HHV of the fuel used.
How does a fuel cell generate power?
Hydrogen fuel cells produce electricity by combining hydrogen and oxygen atoms. The hydrogen reacts with oxygen across an electrochemical cell similar to that of a battery to produce electricity, water, and small amounts of heat. Many different types of fuel cells are available for a wide range of applications.
What is the word equation for a fuel cell?
When hydrogen reacts with oxygen by burning, the chemical energy is given out as heat. A fuel cell converts chemical energy directly into electrical energy – there is no heat. The overall reaction is: 2H 2 + O 2 → 2H 2O with electrons being exchanged from the cathode to the anode.
How much power do fuel cells generate?
around 0.5 to one volt
The power that a fuel cell can create depends on a few factors. These include the fuel cell type, size, operating temperature and gas supply pressure. According to the US Department of Energy, one fuel cell produces around 0.5 to one volt of electricity. This is not enough to power even the smallest electrical devices.
How do you make a fuel cell?
Fuel and oxidant should be uniformly distributed through each cell, and across their surface area. The temperature must be uniform throughout the stack. If designing a fuel cell with a polymer electrolyte, the membrane must not dry out or become flooded with water. The resistive losses should be kept to a minimum.
How do you calculate power density in microbial fuel cells?
Power Density=P/total surface area of electrode. Current Density= I/total surface of an electrode.
How do fuel cells generate electricity Mcq?
How do fuel cells generate electricity? Much like a battery, a fuel cell produces electricity through an electrochemical reaction, which generates electricity without any combustion. Unlike batteries, fuel cells don’t wear out and continuously provide electricity as long as there’s a constant source of fuel and oxygen.
What are the reactants in a fuel cell?
This system used potassium hydroxide as the electrolyte and compressed hydrogen and oxygen as the reactants.
What is a fuel cell ks3?
Namely, hydrogen electrons split from their protons to generate electricity and then both atomic particles combine with oxygen to produce water as the only by-product. Students could look into other forms of sustainable energy and compare them to hydrogen fuel cells.
What can fuel cells power?
Our transportation—including personal vehicles, trucks, buses, marine vessels, and other specialty vehicles such as lift trucks and ground support equipment, as well as auxiliary power units for traditional transportation technologies—can be powered by fuel cells.
How do you calculate the efficiency of a fuel cell?
The fuel cell efficiency is then: where η fu is fuel utilization, which is equal to 1/S H2, where S H2 is the hydrogen stoichiometric ratio, that is, the ratio between the amount of hydrogen actually supplied to the fuel cell and that consumed in the electrochemical reaction:
How much energy can be derived from a fuel cell power plant?
As a rough approximation, about as much thermal energy as electrical energy can be derived from a fuel cell power plant. The quality of the thermal energy will vary, depending on the fuel cell type.
What is the fuel utilization ratio of a hydrogen fuel cell?
where η fu is fuel utilization, which is equal to 1/S H2, where S H2 is the hydrogen stoichiometric ratio, that is, the ratio between the amount of hydrogen actually supplied to the fuel cell and that consumed in the electrochemical reaction: 3-67 S H 2 = N H 2, act N H 2, theor = n F I N H 2, act
What is the source of energy for hydrogen fuel cells?
Hydrogen (like electricity) is not a primary source of energy, but rather a carrier of energy. There are no natural, pure hydrogen reservoirs. Water can be electrolyzed in the reverse of the fuel cell reaction to produce hydrogen.