Search results for: “climate model”
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Waste heat recovery: heat exchanger costs?
Industrial heat comprises around 20% of global CO2 emissions, but around half of all heat generated may ultimately be wasted. Hence, this model simplifies the economics of using a heat exchanger to recover waste heat. A CO2 price above $50/ton would greatly accelerate waste heat recovery projects.
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Transporting green hydrogen as ammonia or toluene?
Green hydrogen could be converted into ammonia, shipped like LPGs, then cracked back into green hydrogen in a developed world country. The best case costs are around $10/kg, while generating an IRR of 10%, with full, round-trip energy efficiency of c60%.
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Exhaust gas recirculation in gas power: the economics?
This data-file explores an alternative design for a combined cycle gas turbine, re-circulating exhaust gases after combustion, in order to facilitate CO2 capture. Costs and operating parameters are summarized from recent technical papers. Even with EGR, it will be challenging to decarbonize a gas turbine for less than $100/ton.
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Turbo-charge gas turbines: the economics?
This data-file models the economics of turbo-charging gas turbines, which increases the mass flow of combustion air, to improve their power ratings by c10-20%. IRRs are solid. Turbo-charged gas turbines could thus gain greater share as grids become saturated with renewables
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Biomass power: costs, levelized costs and BECCS?
This data-file captures the economics of producing wood pellets, generating electricity from biomass, and potentially also building a further CCS facility to yield ‘carbon negative power’ (which is nevertheless more CO2 intensive than burning gas!). Our numbers are backstopped by industry data, including 340 US biomass plants.
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Geothermal energy: costs and economics?
Geothermal energy costs are modelled from first principles in this data-file. LCOEs of 6c/kWh are available in geothermal hotspots. Outside of the hotspots, enhanced geothermal heat can cost 2-14c/kWh-th for a 10% IRR on $500-5,000/kW-th capex, while a rule of thumb is that geothermal electricity costs 5x geothermal heat.
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Room for reforestation: a database of global land use?
The purpose of this data-file is to provide helpful data on how land is used globally, and thus to quantify how much land is available for nature based solutions such as reforestation. Deep-dive details are provided on degraded land, agricultural land, natural ecosystems and reforestable lands.
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Electric arc furnaces for lower-carbon steel production?
Electric arc furnaces generate enormous amounts of heat to recycle scrap steel, with 85% lower CO2 emissions than primary steel production. Our base case model yields a 15% IRR at $475/ton steel prices and a 10c/kWh power price. However, IRRs could be uplifted 2-6pp by integrating with renewables.
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Photovoltaic silicon: the economics?
This model breaks down the costs of photovoltaic silicon, which explains $0.1/W of a $0.3/W solar panel. There is no way silicon producers are making economic returns below $12.5/kg mono-crystalline polysilicon prices. The average kg of PV silicon in a solar panel is also most likely associated with 140kg of direct CO2.
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Landfill gas: the economics?
We estimate that a typical landfill facility may be able to capture and abate 70% of its methane leaks for a CO2-equivalent cost of $5/ton. Other landfill gas pathways get more complex and expensive. Raw and unprocessed landfill gas can be economical to commercialize at a cost of $2-4/mcfe.
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