Asia Power Week 2017

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Efficient and Clean CHP Solutions with Gas Turbines for China, Asia (Room Nile 1)

Distributed power generation for urban areas is often combined with the demand for steam and hot water for smaller industrial processes and / or district heating systems. Distributed power installations also look for a good return on investment, short construction times, low maintenance cost and very low emissions. In addition, operators increasingly require flexibility regarding choice of fuel, mostly natural gas or fuel oil, and variation of power output to compensate for the fluctuations of power generation from renewable sources. The installations must comply with various electrical grid codes which require that the gas turbines exhibit a robust behavior in case of disturbances and failures from the electrical grid. They must stay on line, compensate grid instabilities and are hence an important component with regard to grid stability. Due to increasing operation at varying loads with a higher share of part load, exhaust emissions must remain low over a very wide range. These requirements can be fulfilled by the use of gas turbines developed for low emission and high efficient clean Combined Heat and Power (CHP) solutions. Both topics are becoming increasingly important e.g. in China. This paper will deal with the design of such high efficient clean solutions and will give, beside the technical aspects, also a profitability analysis for different approaches. Operation experiences of such combined heat and power solutions based on projects realized in China will be addressed and maintenance strategies will be presented. Thanks to much lower emissions compared with outdated coal-fired power plants, MGT gas turbines are therefore helping to meet the medium-term objectives of the Chinese government, which wants to provide more clean air in smog-plagued areas.