====== CCGT efficiency ======
The efficiency of a combined cycle gas turbine (CCGT) power plant is defined as follows:

$\eta = \frac{E^-}{Q^+}$
^$\eta$ |Efficiency [%] |
^$E^-$ |Electricity produced by the alternator [kWh] |
^$Q^+$ |Combustion heat from natural gas (LHV basis) [kWh] |