Investigation of the Concepts to Increase the Dew Point Temperature for Thermal Energy Recovery from Flue Gas, Using Aspen®

Fedorova N, Aziziyanesfahani P, Jovicic V, Zbogar-Rasic A, Khan MJ, Delgado A (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Energies MDPI

Book Volume: 12

Article Number: 1585

DOI: 10.3390/en12091585

Open Access Link: https://www.mdpi.com/1996-1073/12/9/1585/htm

Abstract

Thermal energy of flue gases (FG) dissipating from industrial facilities into the environment, constitute around 20% of the total dissipated thermal energy. Being part of the FG, water vapour carries thermal energy out of the system in the form of the latent heat, which can be recovered by condensation, thus increasing the overall efficiency of an industrial process. The limiting factor in this case is the low dew point temperature (usually 40–60 °C) of the water vapour in the FG. The increase of the dew point temperature can be achieved by increasing the water content or pressure. Taking these measures as a basis, the presented work investigated the following concepts for increasing the dew point temperature: humidification of the flue gas using water, humidification using steam, compression of the FG and usage of the steam ejector. Modelling of these concepts was performed using the commercial software Aspen®. The humidification of the FG using water resulted in the negligible increase in the dew point (3 °C). Using steam humidification the temperatures of up to 92 °C were reached, while the use of steam ejector led to few degrees higher dew point temperatures. However, both concepts proved to be energy demanding, due to the energy requirements for the steam generation. The FG compression enabled the achievement of a 97 °C dew point temperature, being both energy-efficient and exhibiting the lowest energy cost.

Authors with CRIS profile

Nataliia Fedorova Lehrstuhl für Strömungsmechanik (LSTM) Pegah Aziziyanesfahani Lehrstuhl für Chemische Reaktionstechnik (CRT) Vojislav Jovicic Lehrstuhl für Strömungsmechanik (LSTM) Ana Zbogar-Rasic Lehrstuhl für Strömungsmechanik (LSTM) Muhammad Jehanzaib Khan Lehrstuhl für Strömungsmechanik (LSTM) Antonio Delgado Lehrstuhl für Strömungsmechanik (LSTM)

How to cite

APA:

Fedorova, N., Aziziyanesfahani, P., Jovicic, V., Zbogar-Rasic, A., Khan, M.J., & Delgado, A. (2019). Investigation of the Concepts to Increase the Dew Point Temperature for Thermal Energy Recovery from Flue Gas, Using Aspen®. Energies, 12. https://doi.org/10.3390/en12091585

MLA:

Fedorova, Nataliia, et al. "Investigation of the Concepts to Increase the Dew Point Temperature for Thermal Energy Recovery from Flue Gas, Using Aspen®." Energies 12 (2019).

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