Search results for: “Brayton”
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Thermodynamic cycles: Carnot, Brayton and Rankine Data?
This data-file contains some simple PV plots and TS plots from different thermodynamic cycles, such as the Carnot Cycle, Brayton Cycle, Rankine Cycle and Otto Cycles.
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Thermodynamics: Carnot, Rankine, Brayton & beyond?
Engines convert heat into work. They are governed by thermodynamics. This note is not a 1,000 page textbook. The goal is to explain different heat engines, simply, in 13-pages, covering what we think decision makers in the energy transition should know. The theory underpins the appeal of electrification, ultra-efficient gas turbines, CHPs, nuclear HTGRs and…
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NET Power: gas-fired power with inherent CO2 capture?
Our NET Power technology review shows over ten years of progress, refining the design of efficient power generation cycles using CO2 as the working fluid. The patents show a moat around several aspects of the technology. And six challenges at varying stages of de-risking.
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LNG liquefaction technologies: an overview?
This data-file is an overview of different LNG liquefaction technologies: APCI, APX, Optimised Cascade, Fluid Cascade, DMR, SMR, PRICO and MMLS. A typical LNG liquefaction plant has energy intensity of 280kWh/ton, consuming 5% of the input gas entering the plant, with 20kg/boe of Scope 1&2 CO2 intensity. But efficient and electric-drive compression can lower these…
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Gas power: levelized costs of combined cycle gas turbines?
Levelized costs of combined cycle gas turbines are built up in this data-file. Our base case costs of gas-fired power generation are 8c/kWh, at a combined cycle turbine converting 55% of the thermal energy of natural gas into electrical energy, for a total CO2 intensity of 0.35 kg/kWh.
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Jet fuel demand: by region and forecasts to 2050?
Jet fuel demand ran at 8Mbpd in 2019, the last year before COVID, and could rise to 18Mbpd by 2050, as global population rises 25%, jet fuel demand per capita doubles and fuel economy per aviation mile rises by 20%. This data file breaks down jet fuel demand by region, including our forecasts through 2050,…
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US decarbonization: energy and CO2 emissions?
The US consumes 25,000 TWH of primary energy per year, which equates to 13,000 TWH of useful energy, and emits 6GTpa of CO2. This model captures our best estimates for what a pragmatic and economical decarbonization of the US will look like, reaching net zero in 2050, with forecasts for wind, solar, nuclear, hydro, oil,…
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Methane slip: how much gas evades combustion?
Methane slip occurs when a small portion of natural gas fails to combust, and instead escapes into the atmosphere. This data-file reviews different technical papers. Methane slip is effectively nil at gas turbines and gas heating (less than 0.1%). It rises to 0.5-3% in cookstoves and some dual-fuel marine engines. However, the highest rate of…
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Thermodynamics of CO2 at different temperatures and pressures?
This data-file aggregates thermodynamic properties of CO2 at different temperatures and pressures. Specifically, how do different pressures and temperatures dictate CO2’s density, Cp, Cv, Heat Capacity Ratio (gamma), Entropy, and Compressibility. These variables matter for CO2 compression, CCS and sCO2 power cycles.
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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 and drive a turbine. Efficiency rises to 58% in a combined cycle. The purpose of this data-file is to tabulate typical operating parameters of gas turbines.
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