Search results for: “NOx”
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Selective catalytic reduction: costs of NOx removal?
This data-file captures selective catalytic reduction costs to remove NOx from the exhaust gas of combustion boilers and burners. Our base case estimate is 0.25 c/kWh at a combined cycle gas plant, which equates to $4,000/ton of NOx removed. Capex costs, operating costs, coal plants and marine fuels can be stress-tested in the model.
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Vehicle emissions of CO, NOx and HCs?
There has been a remarkable reduction in the negative air quality impacts of combustion vehicles since 1970, as quantified in this data-file and over time. Vehicle emissions of CO, NOx and HCs have all fallen by 20-60x over the past 50-years, to 5 grams/mile, 0.2 grams/mile and 0.3 grams per mile, respectively. This data-file quantifies…
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Air quality: sulphur, NOx and particulate emissions?
The flue gas of a typical combustion facility contains c7% CO2, 60ppm of NOx, 40ppm of SOx and 2ppm of particulate dusts. This is our conclusion from tabulating data across 75 large combustion facilities, mainly power generation facilities in Europe. However, the range is broad. As a rule of thumb, gas is cleanest, biomass and…
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Cummins: diesel engine and generator technology?
Cummins is a power technology company, listed in the US, specializing in diesel engines, underlying components, exhaust gas after-treatment, diesel power generation and pivoting towards hydrogen. We reviewed 80 patents from 2023-24. What outlook for Cummins technology and verticals in the energy transition?
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Gas turbines: operating parameters?
A typical simple-cycle gas turbine is sized at 200MW, and achieves 38% efficiency, as super-heated gases at 1,250ºC temperature and 100-bar pressure expand to drive a turbine. The exhaust gas is still at about 600ºC. In a combined cycle gas plant, this heat can be used to produce steam that drives an additional turbine, adding…
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Thermal power plant: loss attribution?
This data-file is a simple loss attribution for a thermal power plant. For example, a typical coal-fired power plant might achieve a primary efficiency of 38%, converting thermal energy in coal into electrical energy. Our loss attribution covers the other 62% using simple physics and industry average data-points.
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Gas generation: what kind of bear is best?
This 20-page report compares combined cycle gas turbines (CCGTs), heavy-duty gas turbines, aeroderivative gas turbines, reciprocating engines and solid oxide fuel cells (SOFCs), on ten dimensions. No one gas generation technology is best. But modular solutions may increasingly rival CCGTs, especially for energizing AI data-centers?
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Dreaming of Electric Frac Fleets?
In 2019, the virtues of switching diesel-powered frac fleets to gas-powered electric have been extolled by companies such as EOG, Shell, Baker Hughes, Halliburton, Evolution and US Well Services. The chief benefit is a material cost saving, quantified per well in this data-model, as a function of the frac fleet size, its upgrade costs, its…
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Shanghai Electric: gas turbine technology competition?
Shanghai Electric gas turbine technology is contrasted against the Western gas turbine leaders in this data-file, based on reviewing 20 patents from 2021-24. Shanghai Electric is clearly trying to compete in this space, and the patent review uncovered interesting details into turbine temperatures, efficiencies, reliability, AI+sensing and manufacturing costs.
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Mainspring Energy: linear generator breakthrough?
Linear generator technology can convert any gaseous fuel into electricity, with c45% electrical efficiency, and >80% efficiency in CHP mode. This data-file reviews Mainspring Energy’s patents. We conclude that the company has locked up the IP for piston-seal assemblies in a linear generator with air bearings, but longevity/maintenance could be a key challenge to explore.
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