Modeling the Effect of Scale Deposition on Heat Transfer in Desalination Multi-Effect Distillation Evaporators
In Multi-Effect Distillation (MED) desalination evaporators, the scale deposit outside the tubes presents a barrier to heat transfers reducing the global heat transfer coefficient and causing a decrease in water production; hence a loss of efficiency and an increase in operating and maintenance costs. Scale removal (by acid cleaning) is the main maintenance operation and constitutes the major reason for periodic plant shutdowns. A better understanding of scale deposition mechanisms will lead to an accurate determination of the variation of scale thickness around the tubes and an improved accuracy of the overall heat transfer coefficient calculation. In this paper, a coupled heat transfer-calcium carbonate scale deposition model on a horizontal tube bundle is presented. The developed tool is used to determine precisely the heat transfer area leading to a significant cost reduction for a given water production capacity. Simulations are carried to investigate the influence of different parameters such as water salinity, temperature, etc. on the heat transfer.
[1] Tahir F., Antar M.A., Maimoon A. The effect of Fouling on Performance and Design Aspects of Multiple-Effect Desalination systems, Chapter 4, An Overview: Desalination, Environment and Marine Outfall Systems, Springer International Publishing, Editors: Mahad Baawain, B.S. Choudri, Mushtaque Ahmed, Anton Purnama, 2014, (pp.35-52).
[2] Lee M, Kang T, Kim Y. Air-side heat transfer characteristics of spiral-type circular fin-tube heat exchangers. Int. J. Refrig. 2010;33(2):313–20.
[3] Kawaguchi K, Okui K, Kashi T. Heat transfer and pressure drop characteristics of finned tube banks in forced convection – (Comparison of heat transfer and pressure drop characteristics of serrated and spiral fins). J. Enhanc Heat Transfer 2005;12(1):1–20.
[4] Nuntaphan A, Kiatsiriroat T. Thermal behavior of spiral fin-and-tube heat exchanger having fly ash deposit. Exp. Therm. Fluid Sci. 2007;31(8):1103–9.
[5] Bell I H,Groll EA, König H. Experimental analysis of the effects of particulate fouling on heat exchanger heat transfer and air-side pressure drop for a hybrid dry cooler. Heat Transfer Eng. 2011;32(3–4):264–71.
[6] Shi YT, Gao M, Tang GH, Sun FZ, Tao WQ. Experimental research of CFB ash deposition on helical finned tubes. Appl. Therm. Eng. 2012;37:420–9.
[7] Jin Y, Tang GH, He YL, Tao WQ. Parametric study and field synergy principle analysis of H-type finned tube bank with 10 rows. Int. J. Heat Mass Transfer 2013; 60:241–51.
[8] Chen H, Wang Y, Zhao Q, Ma H, Li Y, Chen Z. Experimental investigation of heat transfer and pressure drop characteristics of H-type finned tube banks. Energies 2014;7(11):7094–104.
[9] Wang FL, He YL, Tong ZX, Tao WQ. Numerical study of heat transfer and fly ash deposition characteristics for two kinds of h-type finned tubes. Therm. Fluids Eng. F.-L. Wang et al. Fuel 236 (2019) 949–959 958 Summer Conf. 2016
[10] Han H, He YL, Tao WQ, Li YS. A parameter study of tube bundle heat exchangers for fouling rate reduction. Int. J. Heat Mass Trans. 2014;72:210–21.
[11] Darwish M.A., Abdulrahim H., Feed water arrangements in a multi-effect desalting system, Desalination 228 (2008) 30-54.
[12] H. El-Dessouky and H. Ettouney, “Fundamentals of salt water desalination system”, Elsevier Science B.V., 2002.
[13] Dr. Franz Trieb: Aqua-CSP: “Concentrating solar power for seawater desalination – Final report” (DLR) (Stuttgart, November 2007).
[14] Said S, Al-Jaroudi, Anwar Ul-Hamid, Jamal A, Al-Matar. Prevention of failure in a distillation unit exhibiting extensive scale formation. Desalination 2010; 260:119–128.
[15] Maheshwari N.K., Saha D., Sinha R.K., Ritomi M., Investigation on condensation in presence of a noncondensable gas for a wide range of Reynolds number, Nucl. Eng. Des. 227, 2 (2004) 219–238.
[16] Ribatski G., Jacobi A. M., Falling-film evaporation on horizontal tubes-a critical review, International Journal of Refrigeration 28 (2005) 635-653.
[17] Fujita Y. and Tsutsui M., Experimental investigation of falling film evaporation on horizontal tubes, Heat Transfer-Japanese Research 27 (1998), 609-618.
[18] Bourouni K., Jabet T., Analytical model for scale deposition and CO2 release in MED desalination evaporators at high temperature, International Desalination Association Conference, San Diego, August 30-September 4, (2015).
[1] Tahir F., Antar M.A., Maimoon A. The effect of Fouling on Performance and Design Aspects of Multiple-Effect Desalination systems, Chapter 4, An Overview: Desalination, Environment and Marine Outfall Systems, Springer International Publishing, Editors: Mahad Baawain, B.S. Choudri, Mushtaque Ahmed, Anton Purnama, 2014, (pp.35-52).
[2] Lee M, Kang T, Kim Y. Air-side heat transfer characteristics of spiral-type circular fin-tube heat exchangers. Int. J. Refrig. 2010;33(2):313–20.
[3] Kawaguchi K, Okui K, Kashi T. Heat transfer and pressure drop characteristics of finned tube banks in forced convection – (Comparison of heat transfer and pressure drop characteristics of serrated and spiral fins). J. Enhanc Heat Transfer 2005;12(1):1–20.
[4] Nuntaphan A, Kiatsiriroat T. Thermal behavior of spiral fin-and-tube heat exchanger having fly ash deposit. Exp. Therm. Fluid Sci. 2007;31(8):1103–9.
[5] Bell I H,Groll EA, König H. Experimental analysis of the effects of particulate fouling on heat exchanger heat transfer and air-side pressure drop for a hybrid dry cooler. Heat Transfer Eng. 2011;32(3–4):264–71.
[6] Shi YT, Gao M, Tang GH, Sun FZ, Tao WQ. Experimental research of CFB ash deposition on helical finned tubes. Appl. Therm. Eng. 2012;37:420–9.
[7] Jin Y, Tang GH, He YL, Tao WQ. Parametric study and field synergy principle analysis of H-type finned tube bank with 10 rows. Int. J. Heat Mass Transfer 2013; 60:241–51.
[8] Chen H, Wang Y, Zhao Q, Ma H, Li Y, Chen Z. Experimental investigation of heat transfer and pressure drop characteristics of H-type finned tube banks. Energies 2014;7(11):7094–104.
[9] Wang FL, He YL, Tong ZX, Tao WQ. Numerical study of heat transfer and fly ash deposition characteristics for two kinds of h-type finned tubes. Therm. Fluids Eng. F.-L. Wang et al. Fuel 236 (2019) 949–959 958 Summer Conf. 2016
[10] Han H, He YL, Tao WQ, Li YS. A parameter study of tube bundle heat exchangers for fouling rate reduction. Int. J. Heat Mass Trans. 2014;72:210–21.
[11] Darwish M.A., Abdulrahim H., Feed water arrangements in a multi-effect desalting system, Desalination 228 (2008) 30-54.
[12] H. El-Dessouky and H. Ettouney, “Fundamentals of salt water desalination system”, Elsevier Science B.V., 2002.
[13] Dr. Franz Trieb: Aqua-CSP: “Concentrating solar power for seawater desalination – Final report” (DLR) (Stuttgart, November 2007).
[14] Said S, Al-Jaroudi, Anwar Ul-Hamid, Jamal A, Al-Matar. Prevention of failure in a distillation unit exhibiting extensive scale formation. Desalination 2010; 260:119–128.
[15] Maheshwari N.K., Saha D., Sinha R.K., Ritomi M., Investigation on condensation in presence of a noncondensable gas for a wide range of Reynolds number, Nucl. Eng. Des. 227, 2 (2004) 219–238.
[16] Ribatski G., Jacobi A. M., Falling-film evaporation on horizontal tubes-a critical review, International Journal of Refrigeration 28 (2005) 635-653.
[17] Fujita Y. and Tsutsui M., Experimental investigation of falling film evaporation on horizontal tubes, Heat Transfer-Japanese Research 27 (1998), 609-618.
[18] Bourouni K., Jabet T., Analytical model for scale deposition and CO2 release in MED desalination evaporators at high temperature, International Desalination Association Conference, San Diego, August 30-September 4, (2015).
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:80047", author = "K. Bourouni and M. Chacha and T. Jaber and A. Tchantchane", title = "Modeling the Effect of Scale Deposition on Heat Transfer in Desalination Multi-Effect Distillation Evaporators ", abstract = "In Multi-Effect Distillation (MED) desalination evaporators, the scale deposit outside the tubes presents a barrier to heat transfers reducing the global heat transfer coefficient and causing a decrease in water production; hence a loss of efficiency and an increase in operating and maintenance costs. Scale removal (by acid cleaning) is the main maintenance operation and constitutes the major reason for periodic plant shutdowns. A better understanding of scale deposition mechanisms will lead to an accurate determination of the variation of scale thickness around the tubes and an improved accuracy of the overall heat transfer coefficient calculation. In this paper, a coupled heat transfer-calcium carbonate scale deposition model on a horizontal tube bundle is presented. The developed tool is used to determine precisely the heat transfer area leading to a significant cost reduction for a given water production capacity. Simulations are carried to investigate the influence of different parameters such as water salinity, temperature, etc. on the heat transfer.
", keywords = "Multi-effect-evaporator, water desalination, scale deposition, heat transfer coefficient.", volume = "14", number = "12", pages = "572-4", }
