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Performance evaluation of a helical coil heat exchanger working at supercritical conditions in a solar ORC installation

Marija Lazova (UGent) , Henk Huisseune (UGent) , Alihan Kaya (UGent) , Steven Lecompte (UGent) , George Kosmadakis and Michel De Paepe (UGent)
(2016) ENERGIES. 9(6).
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Abstract
Worldwide interest in low grade heat valorization using organic Rankine cycle (ORC) technologies has increased significantly. A new small-scale ORC with a net capacity of 3 kW was efficiently integrated with a concentrated solar power technology for electricity generation. The excess heat source from Photovoltaic (PV) collectors with a maximum temperature of 100 degrees C was utilized through a supercritical heat exchanger that uses R-404A as working medium. By ensuring supercritical heat transfer leads to a better thermal match in the heat exchanger and improved overall cycle efficiency. A helical coil heat exchanger was designed by using heat transfer correlations from the literature. These heat transfer correlations were derived for different conditions than ORCs and their estimated uncertainty is similar to 20%. In order to account for the heat transfer correlation uncertainties this component was oversized by 20%. Next, a prototype was built and installed in an integrated concentrated photovoltaic/thermal (CPV/T)/Rankine system. The results from the measurements show that for better estimation of the sizing of the heat exchanger a more accurate correlation is required in order to design an optimal configuration and thus employ cheaper components.
Keywords
organic Rankine cycle (ORC), supercritical heat transfer, heat exchanger design, helical coil heat exchanger, concentrated PV collectors, CURVED PIPE, FLUID, TUBES, WATER, RECOVERY

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Chicago
Lazova, Marija, Henk Huisseune, Alihan Kaya, Steven Lecompte, George Kosmadakis, and Michel De Paepe. 2016. “Performance Evaluation of a Helical Coil Heat Exchanger Working at Supercritical Conditions in a Solar ORC Installation.” Energies 9 (6).
APA
Lazova, M., Huisseune, H., Kaya, A., Lecompte, S., Kosmadakis, G., & De Paepe, M. (2016). Performance evaluation of a helical coil heat exchanger working at supercritical conditions in a solar ORC installation. ENERGIES, 9(6).
Vancouver
1.
Lazova M, Huisseune H, Kaya A, Lecompte S, Kosmadakis G, De Paepe M. Performance evaluation of a helical coil heat exchanger working at supercritical conditions in a solar ORC installation. ENERGIES. 2016;9(6).
MLA
Lazova, Marija, Henk Huisseune, Alihan Kaya, et al. “Performance Evaluation of a Helical Coil Heat Exchanger Working at Supercritical Conditions in a Solar ORC Installation.” ENERGIES 9.6 (2016): n. pag. Print.
@article{7248287,
  abstract     = {Worldwide interest in low grade heat valorization using organic Rankine cycle (ORC) technologies has increased significantly. A new small-scale ORC with a net capacity of 3 kW was efficiently integrated with a concentrated solar power technology for electricity generation. The excess heat source from Photovoltaic (PV) collectors with a maximum temperature of 100 degrees C was utilized through a supercritical heat exchanger that uses R-404A as working medium. By ensuring supercritical heat transfer leads to a better thermal match in the heat exchanger and improved overall cycle efficiency. A helical coil heat exchanger was designed by using heat transfer correlations from the literature. These heat transfer correlations were derived for different conditions than ORCs and their estimated uncertainty is similar to 20\%. In order to account for the heat transfer correlation uncertainties this component was oversized by 20\%. Next, a prototype was built and installed in an integrated concentrated photovoltaic/thermal (CPV/T)/Rankine system. The results from the measurements show that for better estimation of the sizing of the heat exchanger a more accurate correlation is required in order to design an optimal configuration and thus employ cheaper components.},
  articleno    = {432},
  author       = {Lazova, Marija and Huisseune, Henk and Kaya, Alihan and Lecompte, Steven and Kosmadakis, George  and De Paepe, Michel},
  issn         = {1996-1073},
  journal      = {ENERGIES},
  keyword      = {organic Rankine cycle (ORC),supercritical heat transfer,heat exchanger design,helical coil heat exchanger,concentrated PV collectors,CURVED PIPE,FLUID,TUBES,WATER,RECOVERY},
  language     = {eng},
  number       = {6},
  title        = {Performance evaluation of a helical coil heat exchanger working at supercritical conditions in a solar ORC installation},
  url          = {http://dx.doi.org/10.3390/en9060432},
  volume       = {9},
  year         = {2016},
}

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