full cells
... So How Do Fuel Cells Work? ... There are many different types of fuel cells. ... These different types of fuel cells and their components will be discussed later in the paper Advantages of Fuel Cells: Fuel cells offer many advantages over other energy sources. ... But there are some problems with Fuel Cells. ... Fuel cells can use a variety of fuels that contain hydrogen including natural gas, methanol, refined petroleum, and methane and coal gasification products. Increased Efficiencies: Because they produce electricity directly, fuel cells theoretically are capable of 100% efficiency. Today, fuel cells are operating at efficiencies greater than 70%. ... Because of this efficiency, fuel cells also produce a fraction of the emissions even when using similar fuels. How Can Fuel Cells Be Used? Fuel cells have been used in specific applications for several years. ... Even if you dont have a spacecraft, there are many practical uses for fuel cells. Emergency Power: There has been great interest in fuel cells for back-up and emergency power applications. Because of their size, mobility and reliability, fuel cells can be deployed quickly for use in emergency situations.