Cogeneration Based High Efficiency LNG Liquefaction Plants

2010 ◽  
Author(s):  
Cyrus B. Meher-Homji ◽  
David Messersmith ◽  
Ram Tekumalla ◽  
Neeraj Bhatia ◽  
Karl Masani ◽  
...  
Keyword(s):  
Power Generation ◽  
Co2 Emissions ◽  
Thermal Efficiency ◽  
High Efficiency ◽  
Simple Cycle ◽  
Successful Operation ◽  
Lng Liquefaction

High thermal efficiency of LNG liquefaction plants is of importance to minimize feed usage and to reduce CO2 emissions. The need for high efficiency becomes important in gas constrained situations where any savings in fuel auto consumption of the plant for liquefaction chilling and power generation can be converted into LNG production. The Darwin LNG Facility was the world’s first liquefaction facility to utilize high efficiency aeroderivatives and its successful operation for close to four years has increased the interest in aeroderivative based liquefaction plants. The application of aeroderivative engines allows a significantly lower CO2 footprint of about 30% compared to the use of simple cycle industrial industrial engines. Aeroderivative engines offer very attractive efficiencies where steam systems are not viable or desired by the customer. When steam systems are acceptable, a cogeneration type liquefaction facility can be attractive. Cogeneration concepts can also be used to augment the already high efficiency of aeroderivative engines. This paper will cover concepts relating to cogeneration options for LNG facilities using both aeroderivative engines and industrial engines.

Cryogenic Turboexpanders in LNG Liquefaction Applications

2016 ◽  
Author(s):  
Matt Taher ◽  
Cyrus B. Meher-Homji
Keyword(s):  
Power Generation ◽  
High Pressure ◽  
Electrical Power Generation ◽  
Thermal Efficiency ◽  
Efficient Solution ◽  
Electrical Power ◽  
Fluid Stream ◽  
Booster Compressor ◽  
Lng Liquefaction ◽  
Acceptance Tests

Turboexpanders provide the most efficient solution when it is required to reduce the pressure of a fluid stream. By expanding high pressure fluid, energy in the high pressure fluid entering the turboexpander can be efficiently used for either driving a booster compressor or for electrical power generation. While the plants are designed to operate without the need for the power produced by turboexpander, the work recovered from the expansion is a bonus, which increases the plant thermal efficiency. This paper is intended to explain the benefits of utilizing a turboexpander in LNG liquefaction applications. Also, in absence of a published API standard for a turboexpander-generator package, this paper provides recommendations on factory acceptance tests.

Design and Analysis of the Waukesha APG1000 Engine

2006 ◽  
Author(s):  
Rodney Nicoson ◽  
Julian Knudsen
Keyword(s):  
Power Generation ◽  
Computer Simulation ◽  
Natural Gas ◽  
Rapid Prototyping ◽  
Thermal Efficiency ◽  
High Efficiency ◽  
Design Method ◽  
Department Of Energy ◽  
Gas Engine ◽  
Natural Gas Engine

Waukesha Engine, in cooperation with the Department of Energy, has designed a new high efficiency natural gas engine designed specifically for the power generation market. The APG1000 (Advance Power Generation) engine is capable of achieving 1 MW output at 42% thermal efficiency and less than 1 g/bhp-hr Nox. A design method using modern tools such as 3-D modeling, rapid prototyping and computer simulation have, in a large part, contributed to the success of this engine. This paper discusses the methodology and tools used in the design of the APG engine.

Technology Options for Gas Turbine Power Generation With Reduced CO2 Emission

2005 ◽  
Author(s):  
Timothy Griffin ◽  
Dominikus Bu¨cker ◽  
Allen Pfeffer
Keyword(s):  
Power Generation ◽  
Gas Turbine ◽  
Co2 Emissions ◽  
Power Plants ◽  
Fossil Fuels ◽  
High Efficiency ◽  
Co2 Removal ◽  
Power Generation Equipment ◽  
Gas Recirculation ◽  
Fossil Fuel Power Plants

ALSTOM Power R&D laboratories run various programs aimed at finding options that reduce or avoid CO2 emissions through: • High efficiency power generation equipment to utilize fossil fuels with the lowest possible emissions, and • Technologies to remove and sequester CO2 created in power plants in an environmentally and economically favorable manner. In this paper, an overview of on-going CO2 mitigation activities for gas turbine power generation is addressed. Energy efficiency improvements for both new and existing fossil fuel power plants are briefly reviewed. Customer requirements for future power plants with reduced CO2 emissions are discussed. Novel power generation cycles with exhaust gas recirculation for enhanced CO2 removal are introduced and evaluated. Conclusions are drawn regarding their efficiency, energy consumption and technical feasibility.

Optimization of the Mechanical and Thermodynamic Efficiency Loss Dynamic in a Lean Single Cylinder Natural Gas-Fueled Jet Ignition Engine

2019 ◽  
Author(s):  
Nathan Peters ◽  
Sai Krishna Pothuraju Subramanyam ◽  
Michael Bunce ◽  
Hugh Blaxill
Keyword(s):  
Power Generation ◽  
Thermal Efficiency ◽  
High Efficiency ◽  
Thermodynamic Efficiency ◽  
Spark Ignition Engines ◽  
Brake Thermal Efficiency ◽  
Efficiency Loss ◽  
Operating Condition ◽  
Single Cylinder ◽  
Specific Operating Condition

Abstract In an effort to reduce fuel consumption and lower emissions output, there is a growing need for high efficiency engines in power generation. Ultra-lean (λ > ∼1.6) combustion via air dilution is an enabling technology for achieving high efficiencies while simultaneously reducing emissions of nitrogen oxides (NOx). Jet ignition is a pre-chamber-based combustion system that enables ultra-lean operation beyond what is achievable with traditional spark ignition engines. In this paper, results and analyses related to the downspeeding of a 390cc, high efficiency low-output single cylinder jet ignition engine operating ultra-lean are presented. The engine was developed as part of the US Department of Energy’s Advanced Research Projects Agency–Energy (DOE ARPA-E) GENSETS program1. The purpose of the program is to develop technologies for use in high efficiency combined heat and power generator sets. Due to the intended application of power generation, optimization of the engine for a specific operating condition is critical. An efficiency loss breakdown based on the Thermodynamic First Law is used to analyze the interdependent trends of engine speed, brake power, and normalized air-fuel ratio, lambda, with the aim of optimizing these parameters for brake thermal efficiency. The general trends of efficiency loss pathways with enleanment are found to be relatively insensitive to speed and load although the magnitude of the loss pathways changes. As the relative importance of the efficiency loss pathways changes with operating condition, so too does the lambda at which peak brake thermal efficiency occurs. The “peak efficiency lambda” was found to be at its leanest at low speed and high power where the influence of heat transfer is greatest and mechanical losses are minimized.

scholarly journals Thermal Efficiency Projections of a Simple-Cycle Gas Turbine in Biogas Power Generation

1996 ◽  
Author(s):  
David E. Yomogida ◽  
Ngo D. Thinh ◽  
Valentino M. Tiangco ◽  
Ying Lee
Keyword(s):  
Power Generation ◽  
Sensitivity Analysis ◽  
Gas Turbine ◽  
Thermal Efficiency ◽  
Gas Turbines ◽  
Design Parameter ◽  
Computer Code ◽  
Simple Cycle ◽  
Specific Work ◽  
Expected Values

The thermal efficiency of a 125 kW simple-cycle gas turbine for biogas power generation was estimated, using a computer code developed for simple-cycle gas turbines. The computer code can predict expected values for the thermal efficiency and specific work along with the expected temperatures and pressures at various stages in the gas turbine. For the 125 kW Solar Gas Turbine (Titan series), the projected thermal efficiency is about 14%. This paper additionally presents a sensitivity analysis oo the operating condition and design parameter which had the greatest impacts on the thermal efficiency. These results will assist the California Energy Commission in determining the type of combustion device most suitable for biogas power generation.

Development of the Waukesha 16V150 LTD Advanced Power Generation Engine

2006 ◽  
Author(s):  
Ed Reinbold ◽  
Daniel Mather
Keyword(s):  
Power Generation ◽  
Thermal Efficiency ◽  
High Efficiency ◽  
Phase 1 ◽  
Department Of Energy ◽  
Nox Emissions ◽  
Lean Burn ◽  
Brake Thermal Efficiency ◽  
Reciprocating Engine ◽  
Engine Systems

Waukesha Engine has developed an advanced power generation engine using technologies that were developed as part of the Department of Energy-Advanced Reciprocating Engine Systems (ARES) program. The engine uses lean-burn technologies for high efficiency, and low NOx emissions. The technical goals for the ARES program were 50% Brake Thermal Efficiency (BTE) and 0.075 g/kW-hr NOx emissions (with aftertreatment). The goals for the Waukesha Engine Phase 1 Advanced Power Generation (APG) engine are 42% Brake Thermal Efficiency (BTE) and 0.75 g/kW-hr (1.0 g/Bhp-hr) NOx emissions, capable of 0.075 g/kW-hr (0.1 g/Bhp-hr) with aftertreatment. The barriers and technical paths applied to achieve this performance are discussed in this paper.

scholarly journals Research on the Performance of Solar Aided Power Generation System Based on Annular Fresnel Solar Concentrator

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1579
Author(s):  
Heng Zhang ◽  
Na Wang ◽  
Kai Liang ◽  
Yang Liu ◽  
Haiping Chen
Keyword(s):  
Power Generation ◽  
High Efficiency ◽  
Low Cost ◽  
Economic Index ◽  
Partial Replacement ◽  
Solar Concentrator ◽  
Small Disturbance ◽  
Step Size ◽  
Water Matrix ◽  
Cost Utilization

A solar-aided power generation (SAPG) system effectively promotes the high efficiency and low cost utilization of solar energy. In this paper, the SAPG system is represented by conventional coal-fired units and an annular Fresnel solar concentrator (AFSC) system. The annular Fresnel solar concentrator system is adopted to generate solar steam to replace the extraction steam of the turbine. According to the steam–water matrix equation and improved Flugel formula, the variable conditions simulation and analysis of the thermo-economic index were proposed by Matlab. Furthermore, in order to obtain the range of small disturbance, the method of partial replacement is used, that is, the extraction steam of the turbine is replaced from 0 to 100% with a step size of 20%. In this work, a SAPG system is proposed and its thermo-economic index and small disturbance scope are analyzed. The results show that the SAPG system is energy-saving, and the application scope of small disturbance is related to the quantity of the extraction steam and evaluation index.

High efficiency GeTe-based materials and modules for thermoelectric power generation

2021 ◽  
Author(s):  
Tong Xing ◽  
Qingfeng Song ◽  
Pengfei Qiu ◽  
Qihao Zhang ◽  
Ming Gu ◽  
...  
Keyword(s):  
Power Generation ◽  
Thermoelectric Power ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
High Efficiency ◽  
Waste Heat ◽  
Thermoelectric Performance ◽  
Thermoelectric Generators ◽  
Thermoelectric Power Generation

GeTe-based materials have a great potential to be used in thermoelectric generators for waste heat recovery due to their excellent thermoelectric performance, but their module research is greatly lagging behind...

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