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Session: Parallel Session: Operational Experience I
Session starts: Thursday 22 September, 11:10
Presentation starts: 11:30
Room: Frans van Hasseltzaal

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Antti Uusitalo ()
Jaakko Larjola ()
Teemu Turunen-Saaresti ()

Abstract:
ABSTRACT The first Organic Rankine Cycle (ORC) power plants were built at the beginning of the 1960s and the principle of ORC process has been known for decades. The majority of the early ORC plants were built between 60’s and 80’s. Excluding chloro-fluoro-carbons, the most popular working fluids at that time were chlorobenzenes, fluorinol 85 and toluene. Nowadays the most ORC applications are related to produce electricity and heat from biomass, industrial waste heat, geothermal heat and solar power. In the early stages of the commercialization there were only few manufactures and during the 90’s and the beginning of millennium only very few ORC plants were realized. However, the interest towards the ORC has been raised recently, and there have been many new manufacturers coming on markets during the last decade. The number of delivered ORC units and installed power worldwide has increased rapidly and several hundred ORC plants have been built during the last decade. Also a wide range of more suitable and environmental friendly working fluids have been adapted for the commercial ORC plants compared to the earliest ORC plants. The tightening of the greenhouse gas emission regulations have set the goals and the limits for the use of energy efficient processes and better fuel economy in both large and small scale energy production systems. Nowadays, it is very important to decrease CO2 and CH4 emissions having an effect on the global warming. CH4-rich gases, (biogas, landfill gas) produced by the decay of organic material and biomass, can be exploited in distributed electricity and heat production. Utilizing the waste heat streams from the industrial processes in electricity and heat production is a suitable way to achieve improvements to the energy efficiency of the processes and reducing CO2 emissions. In these kinds of applications the ORC technology is a feasible choice due to its flexible power range and therefore, it is expected that the number of installed ORC plants will increase rapidly in the near future. [1] Larjola J. “Organic Rankine cycle (ORC) based waste heat / waste fuel recovery systems for small CHP applications”. Chapter 9 in: Small- and micro-combined heat and power (CHP) systems, Advanced design, performance, materials and applications. Editor: Robert Beith, 528 p. Woodhead Publishing Limited, Oxford 2011 [2] Quoilin S., Lemort V. “Technological and Economical Survey of Organic Rankine Cycle Systems” 5th European conference Economics and Management of Energy in Industry, Algarve Portugal, April 14 – 17, 2009