ESEGH case studies
ESEGH · Put your knowledge to work in context.
ESEGH is a professional certification exam in energy systems and greenhouse gas management. It is aimed at engineers, analysts, sustainability officers, and policy staff who need working knowledge across the whole energy-to-emissions chain rather than deep specialism in one technology. The ESEGH case studies are 5 cases and about 3,377 words.
1Weak-Grid Solar Plant: Voltage, Curtailment, and Frequency Support
A 400 MWp solar PV plant connects to a 220 kV substation in a region where peak demand is 950 MW and minimum daytime demand in spring is 310 MW. The point of connection has a short-circuit ratio of 2.3.
787 words, about 4 min2Island Hybrid Mini-Grid: Diesel Efficiency, Storage Sizing, and Cyclone Resilience
An island mini-grid serves 18 MW peak demand and 6 MW minimum demand. The installed fleet is four 2.5 MW diesel engines, 8 MWp fixed-tilt PV, three 1.5 MW wind turbines, and a 2 MW/4 MWh lithium-ion battery.
739 words, about 4 min3Cold-Storage Demand Charges: Efficiency First or Battery First?
A cold-storage and food-processing site has a connected load of 4.2 MW, annual electricity use of 28 GWh, and a load factor of 0.76. The tariff has an energy charge of 0.11/kWh and a monthly demand charge of 18/kW based on the facility's maximum 15-minute demand.
617 words, about 3 min4Solar Auction Under Curtailment and Currency Risk
A government runs a reverse auction for 600 MW of solar PV, split into six 100 MW lots, with a ceiling price of 48/MWh and a 20-year PPA. The auction clears at 35-42/MWh.
666 words, about 3 min5Corporate GHG Inventory: Scope 2 Methods and Target Boundary
A manufacturer reports for the current year: natural gas combustion of 450,000 GJ in its own boilers; 300,000 L of diesel in owned trucks; leakage of 180 kg of R-410A from chillers; 120 GWh of purchased electricity, of which 40 GWh is covered by unbundled renewable energy certificates purchased from a wind farm in another region; purchased goods and services estimated at 180,000 tCO2e; upstream transport 12,000 tCO2e; business travel 1,200 tCO2e; employee commuting 3,000 tCO2e; and waste 500 tCO2e. The company uses a location-based grid factor of 0.45 tCO2e/MWh and reports Scope 2 both location- and market-based.
568 words, about 3 min