Search results for: “transmission”
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Energy storage: top conclusions into batteries?
Thunder Said Energy is a research firm focused on economic opportunities that can drive the energy transition. Our top ten conclusions into batteries and energy storage are summarized below, looking across all of our research.
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Wind and solar: cost of grid interconnection?
Cost of grid connection is shaping up to be a major bottleneck for the continued acceleration of new energies. A good baseline is to expect $100-300/kW of grid inter-connection costs, or $3-10/kW-km, over a typical distance of 10-70 km. But the requirement to fund network upgrade costs can push grid connections to cost more than…
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Wind power: energy costs, energy payback and EROEI?
This data-file estimates 3MWH of energy is consumed in manufacturing and installing 1kW of offshore wind turbines, the energy payback time is usually around 1-year, and total energy return on energy invested (EROEI) will be above 20x. These estimates are based on bottom-up modelling and top-down technical papers.
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Power plants: average capacity?
This data-file aggregates granular data into the average capacity of different types of power plants: wind, solar, nuclear, gas, hydro, coal, biomass, landfill gas and geothermal. Energy transition is going to increase the number of inter-connections to the grid by 10-100x.
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Power grids: hell is a hot, still summer’s day?
Ramping renewables to 50% of power grids is a growing aspiration in the energy transition. But in some markets, it may result in devastating blackouts during summer heatwaves, as power demand doubles exactly when wind, solar, gas, transmission losses and disruptions all deteriorate. This 15-page note assesses the implications.
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Windy physics: how is power of a wind turbine calculated?
This data-file is an overview of wind power physics. Specifically, how is the power of a wind turbine calculated, in MW, as a function of wind speed, blade length, blade number, rotational speed (in RPM) and other efficiency factors (lambda). A large, modern offshore wind turbine will have 100m blades and surpass 10MW power outputs.
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Global electricity prices vs. CO2 intensities?
Retail electricity prices average 11c/kWh globally, of which 50-60% is wholesale power generation, 25-35% is transmission and 10-20% covers other administrative costs of utilities. The average CO2 intensity of the global average power grid is 0.45 kg/kWh. Variations are wide. And there is a -35% correlation between electricity prices vs CO2 intensities in different countries…
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Aluminium producers: company screen?
Leading aluminium producers are reviewed in this data-file, across ten companies, producing half of the world’s global output. Scale ranges 1MTpa to 7MTpa. CO2 intensity of primary aluminium production ranges from 3 tons/ton to 17 tons/ton, in aggregate across these companies.
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Cement costs and energy economics?
This data-file captures cement costs, based on inputs, capex and energy economics. A typical cement plant requires a cement price of $130/ton for a 10% IRR, on capex costs of $200/Tpa, energy intensity of 1,000 kWh/ton and CO2 intensity of 0.9 tons/ton. Cement costs can be stress tested in the data-file.
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California electricity prices by hour?
In 2023, power grids with c20-30% solar variation tend to have intra-day spreads of 9c/kWh, between peak wholesale electricity prices at 8pm and trough prices at 10am. Unusually, night-time electricity prices are 40% higher than day-time prices. This data-file quantifies California electricity prices, on a wholesale basis, at a sample of grid nodes, looking hour…
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