Gas Condensing Unit with Inner Heat Exchanger

Authors: Dagnija Blumberga, Toms Prodanuks, Ivars Veidenbergs, Andra Blumberga

Abstract:

Gas condensing units with inner tubes heat exchangers represent third generation technology and differ from second generation heat and mass transfer units, which are fulfilled by passive filling material layer. The first one improves heat and mass transfer by increasing cooled contact surface of gas and condensate drops and film formed in inner tubes heat exchanger. This paper presents a selection of significant factors which influence the heat and mass transfer. Experimental planning is based on the research and analysis of main three independent variables; velocity of water and gas as well as density of spraying. Empirical mathematical models show that the coefficient of heat transfer is used as dependent parameter which depends on two independent variables; water and gas velocity. Empirical model is proved by the use of experimental data of two independent gas condensing units in Lithuania and Russia. Experimental data are processed by the use of heat transfer criteria-Kirpichov number. Results allow drawing the graphical nomogram for the calculation of heat and mass transfer conditions in the innovative and energy efficient gas cooling unit.

Keywords: Gas condensing unit, filling, inner heat exchanger, package, spraying, tunes.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1129628

References:

[1] G. Vigants, I. Veidenbergs, E. Vigants, and D. Blumberga, “Cost Analysis of a Wood Chip Boiler House with a Gas Condenser,” Energy Procedia, vol. 75, pp. 1214–1220, 2015.
[2] Y. Li, S. Chang, L. Fu, and S. Zhang, “A technology review on recovering waste heat from the condensers of large turbine units in China,” Renew. Sustain. Energy Rev., vol. 58, pp. 287–296, 2016.
[3] X. Zhao, L. Fu, W. Yuan, F. Li, and Q. Li, “The Potential and Approach of Flue Gas Waste Heat Utilization of Natural Gas for Space Heating,” Procedia Eng., vol. 146, pp. 494–503, 2016.
[4] S. Maalouf, E. Boulawz Ksayer, and D. Clodic, “Investigation of direct contact condensation for wet flue-gas waste heat recovery using Organic Rankine Cycle,” Energy Convers. Manag., vol. 107, pp. 96–102, 2016.
[5] H. W. Hu, G. H. Tang, and D. Niu, “Experimental investigation of convective condensation heat transfer on tube bundles with different surface wettability at large amount of noncondensable gas,” Appl. Therm. Eng., vol. 100, pp. 699–707, 2016.
[6] Z.-Y. Li, L.-L. Shao, and C.-L. Zhang, “Fin-and-tube condenser performance modeling with neural network and response surface methodology,” Int. J. Refrig., vol. 59, pp. 124–134, 2015.
[7] M. Terhan and K. Comakli, “Design and economic analysis of a flue gas condenser to recover latent heat from exhaust flue gas,” Appl. Therm. Eng., vol. 100, pp. 1007–1015, 2016.
[8] Q. Yi, M. Tian, W. Yan, X. Qu, and X. Chen, “Visualization study of the influence of non-condensable gas on steam condensation heat transfer,” Appl. Therm. Eng., vol. 106, pp. 13–21, 2016.
[9] B. Kilkovsky, P. Stehlik, Z. Jegla, L. L. Tovazhnyansky, O. Arsenyeva, and P. O. Kapustenko, “Heat exchangers for energy recovery in waste and biomass to energy technologies - I. Energy recovery from flue gas,” Appl. Therm. Eng., vol. 64, no. 1–2, pp. 213–223, 2014.
[10] A. S. Dalkilic, M. Aktas, O. Acikgoz, and S. Wongwises, “A Review of Recent Empirical Correlations for the Calculation of Determination of R134a’s Convective Heat Transfer Coefficient in Vertical Condensers,” Int. Commun. Heat Mass Transf., vol. 69, pp. 41–50, 2015.