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Experimental and numerical analysis of diesel engine exhaust heat recovery using triple tube heat exchanger

In this study, a 2000 mm long triple tube heat exchanger was designed and manufactured in this work with three intermediate tubes having annulus space of 26 mm, 32 mm and 36 mm, respectively. Experimental investigations were carried out in the system to assess the percentage of energy savings. On the diesel engine experiments were conducted by varying the load conditions at 25%, 50%, 75% and 100%, respectively. Motor speed was varied at 900 rpm, 1200 rpm and 1500 rpm, respectively for each load condition. Also incorporated during the study were counter current, co-current with counter current, counter current with co-current and co-current fluid flow patterns. It is found that, while increasing the load and speed, the heat transfer rate of the heat exchanger increased. It is also observed that, the fluid counter current flow pattern gave better performance compared to other flow pattern types. The effects of the operating parameters on the heat exchanger's performance are represented by the Nusselt number and effectiveness. The results of the experiments were also compared with the thermal energy storage performance of the double tube heat exchanger. It is found that, compared to double tube heat exchanger, 20% of fuel energy was saved by using triple tube heat exchanger as waste heat recovery system.
PAPER REVISED: 2019-07-13
PAPER ACCEPTED: 2019-09-05
  1. Carlomagno, G.M., et. al., Heat recovery from diesel exhausts by means of a fluidized bed heat exchanger. ACS Symp. Ser.;(United States), Istituto di Aerodinamica, Universita di Napoli, 79 (1983), 1, pp. 222.
  2. Pradeep Mohan Kumar.K., et al. al., Computational Analysis and Optimization of Spiral Plate Heat Exchanger, J. of Applied Fluid Mechanics, Volume 11 (2018), Special Issue,, 121-128,.
  3. Hatami, M., et. al., Optimization of finned-tube heat exchangers for diesel exhaust waste heat recovery using CFD and CCD techniques, IntCommun Heat Mass Transf., 57 (2014), 2, pp.254-263.
  4. Vivekanandan. M et. al, Pressure Vessel Design using PV-ELITE Software with Manual Calculations and Validation by FEM, Journal of Engineering Technology, 8 (2019),1, pp.425-433,.
  5. Hatami, M., et. al., Experimental and thermodynamical analyses of the diesel exhaust vortex generator heat exchanger for optimizing its operating condition, ApplTherm Eng., 75 (2015), 5, pp.580-591.
  6. Hatami, M., et. al., Comparative study of different exhaust heat exchangers effect on the performance and exergy analysis of a diesel engine, ApplTherm Eng., 90 (2015), 1, pp.23-37.
  7. Mavridou, S., et. al., Comparative design study of a diesel exhaust gas heat exchanger for truck applications with conventional and state of the art heat transfer enhancements, ApplTherm Eng., 30 (2010), 8/9, pp. 935-47.
  8. Govindasamy.P, Govindasamy.P, et al., Experimental Investigation of the Effect of Compression Ratio in a , Experimental Investigation of the Effect of Compression Ratio in a Direct Injection Diesel Engine Fueled with Spirulina Algae Biodiesel, Direct Injection Diesel Engine Fueled with Spirulina Algae Biodiesel, J. of Applied Fluid J. of Applied Fluid MechanicsMechanics,11,11(2019)(2019), Special Issue, pp. 107, Special Issue, pp. 107--114.114.
  9. SenthilKumar, K,. et. al., Numerical Analysis of Triple Concentric Tube Heat Exchanger using Dimpled Tube Geometry, Asian Journal of Research in Social Sciences and Humanities, 6 (2016), 8, pp. 2078-2088.
  10. Senthil Kumar, K., Studies on diesel engine waste heat recovery using tubular exchanger with different inner tube geometries, Ph.D Thesis, Annamalai Unversity, Chennai, India, 2015,
  11. Avudaiappan.T, et al., Potential Flow Simulation through Lagrangian Interpolation Meshless Method Coding, J. of Applied Fluid Mechanics, 11 (2018), Special Issue, pp. 129 -134,.
  12. Taymaz, I., An experimental study of energy balance in low heat rejection diesel engine, Energy, 31 (2006), 1, pp. 364-371.
  13. Yu, C., and Chau, K.T., Thermoelectric automotive waste heat energy recovery using maximum power point tracking, Energy Convers Manage, 50 (2009), 2, pp.1506-1512.