Industrial Power
SGT-800 Gas Turbine Environmental Product Declaration according to ISO 14021
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Sustainability as opportunity Sustainability is the basis for how we do business Our goal is to create value for the long term by treating people and the environment in a responsible manner. Innovative products and solutions are the foundation for our success They help our customers to achieve their business goals while meeting global challenges such as urbanization, demographic change, climate change and resource scarcity. We walk the talk We pursue ambitious goals with regard to resource efficiency and environmental protection; we see our employees as our most valuable asset and develop them for the long term; we value a corporate culture with a strong emphasis on integrity; and we promote education, social issues, arts and culture wherever we operate.
Siemens aims to set the highest standards for Environmental Protection. We urge our business partners to share this ambition. We cooperate with both customers and suppliers in an honest and open dialog in order to drive forward a joint effort to attain continuous improvement. The main objective of our environmental work is to prevent pollution and continually reduce the environmental impact from our activities in order to protect the environment for future generations. To meet these objectives, we will maintain and further develop a culture in which reducing the environmental impact of the product life cycle is an integral part of our daily work practice. Our integrated management system for environment, health and safety, ISO 9001, 14001 and OHSAS 18001, is implemented worldwide within the Siemens Energy Sector.
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Power Generation for Industrial and Oil & Gas The world is faced with the challenge of balancing increasing worldwide energy consumption with the need to reduce greenhouse gas emissions. Through its extensive portfolio of highly efficient power generation solutions, Siemens is perfectly placed to deliver products which combine both economic feasibility and environmental protection. Product stewardship: The Siemens Environmental Protection Standards Environmental compatibility is a cornerstone of product design at Siemens. In 1993, we published an in-house standard to advance environmentally compatible product design throughout the company. The standard has since been expanded to provide product development engineers with a comprehensive toolbox. This Siemens Environmental Protection (EP) Standard provides the basis for environmentally compatible product and system design recording and declaration of substances requirements regarding battery containing products requirements regarding packaging environmental product declarations.
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These requirements and regulations are accompanied by a guideline giving examples of how to implement the standard’s requirements; a semi-quantitative tool for evaluating a product’s environmental footprint is also available. The standard describes how to address the needs of environmentally compatible product and system design in management systems.
Environmental Product Declaration The data in this Environmental Product Declaration (EPD) are related to one gas turbine type of the SGT-800 for power generation with an average output power of 50 MW. The environmental impact is given by the specific material footprint and by the global warming potential (GWP) related to the product. The Global warming potential (GWP) has been evaluated within a full scale Life Cycle Assessment according to ISO 14040.
Product description
Material allocation
The SGT-800 industrial gas turbine combines a reliable robust design with high efficiency and low emissions. This makes the SGT-800 an excellent choice for Industrial, Refinery and Oil & Gas applications in simple cycle, cogeneration or combined cycle installations.
The SGT-800 consists to nearly 100 percent of steel, predominantly high-alloyed steel. Figure 1 shows the material allocation of the product.
The SGT-800 is a single-shaft machine with fifteen compressor stages. The first three stages have variable geometry. To minimize leakage over the blade tips, abradable seals are applied to stages four to fifteen. The three-stage turbine is built as one module for ease of maintenance and is bolted to the compressor shaft. Turbine stator flanges are air-cooled to reduce running clearances and improve efficiency. Its overall design ensures easy service access to the combustor and burners.
1% 7%
72%
The SGT-800 is available as a skid-mounted package which incorporates the gas turbine and gearbox on a single base frame, or with gearbox placed directly on the foundation together with generator.
20%
It is easily transported, installed and maintained at site. Mechanical auxiliary systems are mounted on an external skid placed close to the turbine. ■ Non-alloy steel ■ Low-alloy steel
■ High-alloy steel ■ Other materials
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Key Environmental Performance Indicators Siemens uses standard life-cycle software for the evaluation of the environmental impact of all product life-cycle stages. All results are verified by internal reviews. Global Warming Potential (GWP) Global warming is the rising of the global temperature due to emissions of greenhouse gases such as carbon dioxide and methane. The GWP is evaluated in CO2 equivalents. The GWP of the SGT-800 gas turbine design is shown in Figure 2. The diagram is separated into the four life-cycle sections “Material inventory”, “Manufacturing” and “Service” as explained on page 4. More than half of the environmental impacts of global warming are caused by the “Material inventory”. The operational phase, on the other hand, has no real impact on the GWP of the product.
64%
Due to the high efficiency of the SGT-800 even simple cycle operation would lead to CO2 emission savings of over 8kt CO2 per year. The SGT-800 provides economic viability and ecofriendliness as well as a high level of availability and reliability.
Simple Cycle*: 29%
> 8,000 t CO2 per year
Combined Cycle**: > 68,000 t CO2 per year
7% Material Inventory
Manufacturing
Service
“End of life” – Recycling reduces the environmental impact of the product and gives a positive contribution to the overall GWP of the product (not shown). 6
The turbines high exhaust energy provides for an excellent efficiency level when used in cogeneration or combined cycle power plants, resulting in low fuel consumption and allowing a CO2 emission reduction of over 68kt CO2 per year.
Greenhouse gas emissions savings of one SGT-800, 47MW
Global Warming Potential 70 60 50 40 30 20 10 0
Environmental Benefit All SGT-800 units are equipped with a DLE combustion System. Dry Low Emission (DLE) combustion is standard throughout the product range, to minimize NOx emissions and ensure that our turbines comply with both global and regional emission regulations. Our leading-edge turbine technology offers broad fuel flexibility and outstanding efficiencies for economic fuel consumption and low CO2 emissions.
* b ased on operating regime E (basis), ISO 3977 9:1999(E), against baseline for global power generation of 584kgCO2/MWh ** based on operating regime B (basis), ISO 3977-9:1999 (E), against baseline for global power generation of 584kgCO2/MWh
Description of the life-cycle stages An important product focus for Siemens is to minimize the environmental impacts from resource extraction through to ultimate disposal. At every stage, Siemens has developed trendsetting solutions in accordance with sustainable life-cycle thinking.
Materials The life-cycle stage “Materials” includes the material inventory which involves the extraction of natural resources, transport to the processing sites and the production of raw materials. All product materials have been chosen with regard to minimizing environmental impact. The SGT-800 gas turbines consist mainly of high alloyed steel. This ensures a high degree of recyclability. Manufacturing The “Manufacturing” section covers all production processes up to the assembly of the finished product at the manufacturing site. The essential data like energy, water and gas consumption are based on the annual manufacturing data of the site. Operation, Service The life-cycle stage “Operation and Service” cover all environmental impacts of the described product system during its operation phase. This also includes the related service equipment. For gas turbines, and therefore also for this LCA, a normal operation time of about 20 years is assumed. Its with high efficiency and low emissions have made SGT-800 gas turbine solutions to the choice for Industrial, Refinery and Oil & Gas applications in simple cycle, cogeneration or combined cycle installations. End of life The end-of-life scenario includes the disassembly, recycling and thermal treatment of all recyclable materials and also the disposal of all other materials. Recycling reduces significantly the consumption of primary materials. A high degree of recyclability is given due to the high amount of steel for the SGT800 gas turbines. In the case of steel, the recycling rates are nearly 100%.
Published by and copyright © 2014: Siemens AG Energy Sector Power Generation Wolfgang-Reuter-Platz 47053 Duisburg, Germany
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