Convert from dollar per mega Watt hour to dollar per Joule
function from_dollarperMWh extends Modelica.SIunits.Icons.Conversion; input SolarTherm.Types.EnergyPrice_MWh dpMWh "Dollar per MWh value"; output SolarTherm.Types.EnergyPrice dpJ "Dollar per Joule value"; end from_dollarperMWh;