Table 1 Different FC types [17]

Alkaline AFC

OH ⁻

50−200^∘C

Used in space vehicles. e.g. Apollo Shuttle

Proton exchange membrane PEMFC

H ⁺

50−100C

Especially suitable for vehicles and mobile applications,

but also for lower power CHP system

Phosphoric acid PAFC

H ⁺

220^∘C

Large numbers of 200 kW CHP systems in use.

Molten carbonate MCFC

\( CO_{3}^{2-} \)

650^∘C

Suitable for medium to large scale CHP systems, up to MW capability.

Solid oxide SOFC

O ²⁻

500−1000^∘C

Suitable for all sizes of CHP systems, 2kW to multi MW