Combined Cycle Power Plants

Designed for lowest life cycle cost Combined Cycle process schematic In a combined cycle power plant the hot exhaust gas of a gas or oil fired gas turbine is utilized to generate steam in a separate water / steam cycle. The hot steam is expanded in a steam turbine providing power to drive a generator. The combination of gas and steam turbine cycles allows electric power generation with highest efficiency. In a multi shaft arrangement (as shown in the picture) both, the gas turbine and the steam turbine, each are connected to a generator. In a single shaft arrangement gas turbine and steam turbine drive the same generator to produce electricity.

Example of a Steam Turbine Reheat Solution in a WtE Plant

One highly efficient solution for such waste-to-energy (or Energy from Waste) power plants is the SST-700RH reheat steam turbine which consists of one geared high-pressure (HP) module and one direct-drive low-pressure (LP) module. Proven standardization ensures low investment and life cycle costs. The SST-700RH has a high volume flow and a large exhaust area (up to 9.6 meters) to achieve maximal performance. The SST-700RH reheat solution was selected by Amsterdam’s Waste & Energy Company for its 4th generation WFPP (Waste Fired Power Plant) in 2003. With the SST-700RH at the heart of the process, the plant was designed to burn 900,000 tonnes of waste per year at an efficiency of 22%. During 2007, this will have increased to 1.5 million tonnes at an efficiency of 30%

Integrated Gasification Combined Cycle (IGCC)

A Low Carbon Power Generation Option for the Future Integrated Gasification Combined Cycle process IGCC is a power generation technology that uses proven gasification technology to transform coal and other fuels into a synthetic gas (syngas) which is used in a combined cycle to produce power. This technology is available today that is attractive by enabling pre-combustion capture of up to 90% CO2 from the syngas for storage or enhanced oil recovery. We supply products and modules for a wide range of IGCC applications. Our gas turbines have accumulated significant operational experience on syngas in IGCC plants and other applications. In addition to the traditional Siemens power generation products that are available for IGCC application, we can also supply plant controls, compression solutions and gasification technology. Benefits: Very low air pollutant emissions Proven CO2 capture process Fuel flexibility of SFG (Siemens Fuel Gasification) gasifier for a wide range of solid (and liquid) fuels Lower water use and solid waste production Can be integrated into polygeneration facilities Phased construction possible Gas Turbines for IGCC Applications Our state-of-the-art gas turbine and steam turbine generators are well suited for IGCC projects. We have developed reference plant concepts that will lead to cost effective, complete combined cycle power plants for IGCC applications in the 500-600 MW size range.

Reheat Steam Turbines to Power Biomass Plants

Biomass is an extremely valuable source of energy, since it is defined as CO₂-neutral and a renewable energy source. As available resources are limited, maximum utilization of the fuel is very important and the technologies to be applied have to be efficient, reliable and cost-effective. Biomass-fueled Combined Heat and Power (CHP) plants are an excellent solution to increase power output without burdening the environment. Driven by economic considerations and the need for uninterrupted power supply, our steam turbine technology has been fine-tuned to harmonize with this plant concept.

Siemens Simple Cycle Power Plant (SSC™)

Our competence and experience are your competitive advantage In a simple cycle power plant gas or oil is burned to drive a gas turbine. The gas turbine drives a generator to produce electricity Our gas turbine based Siemens Simple Cycle Plants (SSC™) are based on a pre-planned design concept with capacities from 68 to 350 MW per unit for the 50 Hz and 60 Hz market. These plants offer excellent operational flexibility for cycling, peaking or continuous service while providing additional benefits through high fuel flexibility. Benefits: Optimized design Excellent investment / performance ratio Reduced engineering cost Short lead times Increased availability Rapid start ups and high operational flexibility

Siemens Wind Power - Proven Technology

Today, the increasing energy demand and the need for clean power generation leads everyone's mind to the concept of renewable energy sources. With highly efficient, solid and reliable wind turbine Siemens Wind Power offers a solution to meet energy needs and environmental awareness.

Steam Turbine Solutions for Solarthermal Power Plants

High oil and gas prices and awareness of greenhouse effects are contributing to an increasing demand for renewable energy. Solar power is one renewable energy option to satisfy that growing demand. A typical process is to gather solar radiation in collectors, concentrating the heat to tubes in their center, transferring it to synthetic oil in the tubes and further to heat exchangers close to the power plant. The heat exchanger transfers the heat thus generated into superheated steam, to run a steam turbine for generation of electrical power. The oil which transfers the heat cannot sustain a consistently high temperature. To counteract this, Siemens offers a steam turbine reheat concept in a two-module arrangement (SST-700 RH), where each of the modules can be optimized for its specific operating conditions.