The 261-MW_e Rya Combined Heat and Power (CHP) plant supplies power and heat to the city of Gothenburg, Sweden. This combined-cycle CHP comprises three Siemens SGT-800 gas turbines, each connected to a supplementary-fired Heat Recovery Steam Generator (HRSG) supplying steam to a Siemens SST-900 steam turbine. High flexibility with regard to load range, high efficiency, operational reliability and security of power and heat supply were dominant factors in the selection of the Siemens multi-shaft combined-cycle solution. The plant is normally connected to the national grid, but can also operate on the local grid, which is divided into 25 sections. This allows the local grid to be restored after a power cut. Hence reliable house-load operation after loss of grid – or a black start capability to house-load operation using the plant’s own black-start diesel generator - were essential requirements.

This paper describes some examples of how gas-turbine cogeneration plants can be configured to operate on high-hydrogen-content refinery gas and cock-oven gas. Cogeneration plants fuelled using waste gases provide an economic and environmentally friendly way of helping to satisfy the heat and power needs of industry or a community. The paper has explored the use of the waste fuels in a gas turbine, explaining some of the main considerations necessary to ensure the cogeneration plant provide the required heat and power in a reliable, efficient manner.

This paper describes the supply of four SGT-400 Gas Turbine generating packages rated at 12.9MWe each, to Uralkali JSC of Russia for installation at two potassium mines in Berezniki City. The SGT-400 engines are the key components for two cogeneration plants which are located in one of the main industrial centers of the Ural region. Each cogeneration plant will comprise two generating sets in order to provide efficient and reliable production of power and steam for use in the mines and for the manufacturing process. The paper describes the advantages of the technology and the details of the specific application.

Cogeneration, or production of combined heat and power (CHP) is one of the most efficient and environmentally favorable methods of energy conversion in the power generation industry. This paper presents the technology of CHP plants and gives an example of an application in Russia, “Moscow City.” The plant consists of two combined cycle blocks, type SCC-800 2 x 1. Each block is based on two 45 MW SGT-800 gas turbines and one 30 MW SST-700 steam turbine. The paper describes the advantages of the technology and the details of the specific application.

China faces a great challenge to secure the electricity supply for a steadily growing economy and at the same time use environmentally friendly technologies. The simultaneous production of electric power and heat (Combined Heat and Power = CHP) is the preferred solution in terms of economic and environmental efficiency. This paper shows how modern CHP technology using different fuel types and plant technologies can contribute to conserving fuel resources and minimizing carbon dioxide emissions.

The Municipal waste and biomass is mostly used only for steam or hot water production for district heating, but the increase in energy prices has made it more customary to produce electricity production by adding a steam turbine. By also adding a gas turbine to municipal waste or biomass- burning plants, the power and heat generation can be substantially increased, not only by the gas turbine power, but also by the improved steam cycle.

The EU Emissions Trading Scheme (EU ETS) bears various uncertainties and price risks for the commodities CO2, power and fuel. However, real life cases and the insight into market mechanisms show that industrial self generation is a valuable cross-commodity hedge against these risks. The EU Emissions Trading Scheme introduced CO2 as a new commodity. This paper demonstrates that, contrary to the common perception, this new commodity is leading to a reduced risk for CHP plants.