- As an Energy System Engineer, you are working on a power generation company which operate the combined-cycle power plant. In normal operation, this power plant has run using dual-fuel mode which is natural gas and diesel. Due to new company policy in the sustainability strategy, the power plant need to do the environmental improvement by using more sustainable fuel. Green hydrogen has been chosen to be mix with natural gas by \( 30 \%(\mathrm{v} / \mathrm{v}) \) and the green diesel will replace and substitute all of the conventional diesel. By doing this, it is expected that the gas turbine efficiency will increase by \( 30,067 \% \).
- From the supplier data, the heating value of green diesel is 43,92 \( \mathrm{MJ} / \mathrm{kg} \) with the density of \( 786.5 \mathrm{~kg} / \mathrm{m} 3 \). For the green hydrogen, the heating value is \( 119,96 \mathrm{MJ} / \mathrm{kg} \) (or \( 33,32 \mathrm{kWh} / \mathrm{kg} \) or \( 3 \mathrm{kWh} / \mathrm{m} 3 \) )
- From the given data and information, by using the calculation sheet:
-1. Calculate the thermal energy conversion from the existing operating data!
- 2. Calculate the thermal energy conversion after using the sustainable fuel!
-3. What is the amount of green hydrogen and green diesel required to reach the same electricity production? What is the percentage of reduction in natural gas consumption?