@sh.add_function(dsp, outputs=['fuel_heating_value'])
def calculate_fuel_heating_value(engine_fuel_lower_heating_value, fuel_density):
"""
Calculates the fuel heating value as kWh/l.
:param engine_fuel_lower_heating_value:
Fuel lower heating value [kJ/kg].
:type engine_fuel_lower_heating_value: float
:param fuel_density:
Fuel density [g/l].
:type fuel_density: float
:return:
Fuel heating value [kWh/l].
:rtype: float
"""
return engine_fuel_lower_heating_value * fuel_density / 36e5