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Greenhouse gas reduction potential by producing electricity from biogas engine wate heat using organic Rankine cycle

Uusitalo, Antti; Uusitalo, Ville; Grönman, Aki; Luoranen, Mika; Jaatinen-Värri, Ahti (2016)

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Greenhouse gas reduction potential by producing electricity from biogas engine waste heat using organic Rankine cycle.pdf (156.3Kb)
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Uusitalo, Antti
Uusitalo, Ville
Grönman, Aki
Luoranen, Mika
Jaatinen-Värri, Ahti
2016
Elsevier

This publication is protected by copyright. You may download, display and print it for Your own personal use. Commercial use is prohibited.
https://doi.org/10.1016/j.jclepro.2016.03.125
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Julkaisun pysyvä osoite on
http://urn.fi/URN:NBN:fi-fe2018052324459

Tiivistelmä

Organic Rankine cycles have been identified as a suitable technological option for converting low-grade heat into electricity with relatively high efficiency, and the organic Rankine cycle technology has been successfully implemented in different power production systems and in recovering heat in industrial processes. This paper studies the greenhouse gas emission reduction potential by using organic Rankine cycles for recovering exhaust gas heat of biogas engines. The study concentrates especially on the biogas engine power plants in Europe. Life cycle assessment methods are used and various waste heat utilization scenarios are compared. According to the results, greenhouse gas emissions can be reduced significantly if the thermal energy of the exhaust gases, otherwise lost in the process as waste heat, is utilized for additional electricity production by means of organic Rankine cycle. However, there may already be use for the exhaust gas heat in biogas plants in the form of heat power. In these cases, the use of organic Rankine cycle does not necessarily lead to greenhouse gas emission reductions. The results also indicate, that the working fluid leakages and production as well as the organic Rankine cycle construction materials and production have only marginal effects on the results from greenhouse gas perspective.

Lähdeviite

Uusitalo, A., Uusitalo, V., Grönman, A., Luoranen, M., Jaatinen-Värri, M. (2016). Greenhouse gas reduction potential by producing electricity from biogas engine waste heat using organic Rankine cycle. Journal of Cleaner Production, Vol 127. p. 399-405. DOI:10.1016/j.jclepro.2016.03.125.

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