Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Jari Backman"'
Publikováno v:
Journal of Sustainable Development of Energy, Water and Environment Systems, Vol 2, Iss 2, Pp 174-190 (2014)
In this paper we built three types of artificial neural networks, namely: Feed forward networks, Elman networks and Cascade forward networks, for forecasting wind speeds and directions. A similar network topology was used for all the forecast horizon
Externí odkaz:
https://doaj.org/article/50155b1443ec4c4ea36197595abb9b8a
Flow Control Methods and Their Applicability in Low-Reynolds-Number Centrifugal Compressors—A Review
Publikováno v:
International Journal of Turbomachinery, Propulsion and Power, Vol 3, Iss 1, p 2 (2017)
The decrease in the performance of centrifugal compressors operating at low Reynolds numbers (e.g., unmanned aerial vehicles at high altitudes or small turbomachines) can reach 10% due to increased friction. The purposes of this review are to represe
Externí odkaz:
https://doaj.org/article/f4885b83b1db47e49d1b6493122c0a2c
Publikováno v:
International Journal of Rotating Machinery, Vol 2014 (2014)
The effect of the width of the vaneless diffuser on the stage performance and flow fields of a centrifugal compressor is studied numerically and experimentally. The diffuser width is varied by reducing the diffuser flow area from the shroud side (i.e
Externí odkaz:
https://doaj.org/article/0336d229629f49408664033c19e756e5
Publikováno v:
International Journal of Rotating Machinery, Vol 2009 (2009)
A centrifugal compressor with three different shrouded 2D impellers is studied numerically. All impellers have the same dimensions, and they only differ in channel length and geometry. Noticeable differences in efficiency are observed. Two different
Externí odkaz:
https://doaj.org/article/5e1113b8255c4aeebd40bacdf394e1a8
Publikováno v:
Energy. 159:827-841
One feature in the ongoing energy transition is that the energy is more often produced close to its final utilizer. The operated device should be reliable to use and it should not annoy the people. Also, the size of the power production module may ha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab236ae04b7d0fc52321f4a8d8aacc36
https://doi.org/10.1016/j.energy.2018.06.204
https://doi.org/10.1016/j.energy.2018.06.204
Publikováno v:
Energy Conversion and Management. 166:297-307
The ever-increasing demand for more efficient energy conversion has placed designers under increasing pressure to develop processing equipment that can meet contemporary needs. It has long been known that a decreasing Reynolds number has a negative e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db5886bd66fa87b2494fa4eeec3a3d09
https://doi.org/10.1016/j.enconman.2018.04.014
https://doi.org/10.1016/j.enconman.2018.04.014
Publikováno v:
Energy Procedia. 129:1117-1124
The predominant advantage of a supercritical CO2 (SCO2) Brayton cycle is it’s diminished compression work when compared to an ideal working fluid such as helium, due to low compressibility factor. For flows where the density approaches the critical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dde128f48bffd6d1ea2914c5fbb3edc6
https://doi.org/10.1016/j.egypro.2017.09.233
https://doi.org/10.1016/j.egypro.2017.09.233
Autor:
Aki Grönman, Janne Nerg, Juha Honkatukia, Jari Backman, Ahti Jaatinen-Värri, Antti Uusitalo, Petri Sallinen
Publikováno v:
Volume 8: Microturbines, Turbochargers, and Small Turbomachines; Steam Turbines.
Small-scale gas turbines offer a light weight alternative to engine generators. Despite the many benefits of a micro gas turbine, its efficiency cannot match that of its competitors. This discrepancy is mostly due to Reynolds number losses in turboma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79bf2baa5e9394e96a19a9e587f75ec9
https://doi.org/10.1115/gt2019-90010
https://doi.org/10.1115/gt2019-90010
Publikováno v:
Energy Conversion and Management. 111:115-124
The demand for continually improving the efficiency of large diesel engines requires increasing the pressure ratio and efficiency of turbochargers. One answer to these requirements is to use two-stage electrically assisted turbochargers, which will e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b631eea82fb849fff2a3fb48b2908bf
https://doi.org/10.1016/j.enconman.2015.12.055
https://doi.org/10.1016/j.enconman.2015.12.055
Autor:
Teemu Turunen-Saaresti, Rafal P. Jastrzebski, Jussi Sopanen, Juha Pyrhonen, Juha Honkatukia, Janne Nerg, Alexander Smirnov, Eero Scherman, Antti Uusitalo, Jari Backman, Eerik Sikanen, Janne Heikkinen, Aki Grönman, Nikita Uzhegov, Petri Sallinen, Niko Nevaranta, Olli Pyrhonen, Teemu Sillanpää
Publikováno v:
Energy Conversion and Management. 225:113427
Many waste heat recovery and biomass applications offer opportunities for small-scale steam turbines to produce electricity and to improve systems’ energy efficiency. However, the currently used axial turbine-based technology is generally character
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::55ed868465c331add5880083b3567f62
https://doi.org/10.1016/j.enconman.2020.113427
https://doi.org/10.1016/j.enconman.2020.113427