Worked on updating gas turbine combined heat and power (CHP) conversion efficiencies in the quintel/etsource repository, focusing on improving the accuracy of generation forecasts and cost projections. Leveraged configuration management and data update skills to adjust steam hot water output efficiency downward and electricity output efficiency upward, reflecting the latest dataset findings. Implemented these changes using YAML, ensuring minimal disruption to existing models and maintaining integration stability through validation with current tests. The update provided more reliable data for policy analysis and model projections, demonstrating a careful approach to data-driven improvements within the energy modeling domain over the project period.