Skip to main content
SpringerLink
Log in

Investigating the effect of coolant’s heat transfer type on thermostat placement

  • Published:
Journal of Thermal Analysis and Calorimetry Aims and scope Submit manuscript

Abstract

Nowadays, modern engines control a wide range of parameters in order to meet desired functions and standards. Measurement of mechanical systems has long been an issue for engineers and researchers. Sensors are the devices which monitor the mentioned parameters. Therefore, the accuracy of sensors is an important consideration. Extracting the exact temperature of the coolant (coolant content: 50% water and 50% ethylene glycol) in engine cooling system by the sensors and also thermostat depends largely on their correct placement. The task of controlling coolant flow rate and engine temperature is done by the thermostat mounted in the cooling system. In the present work, the coolant temperature behavior has been investigated due to inappropriate design of the thermostat housing in a gasoline engine. Considering the importance of the cooling issue, the problem has been solved by two methods, namely test and numerical solution. The results obtained from these methods have had a good convergence with each other. Warm-up test results show that thermostat is not capable of sensing the real temperature of the coolant. According to the results, a design change has been made in the thermostat housing. The new sample of thermostat housing has been tested and also numerically analyzed. A good agreement between the test results and numerical solution has been observed. The opening temperature and time of the thermostat in new housing have been reduced by more than 9 °C and nearly 149 s (about 2.5 min), respectively.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
Fig. 13

Similar content being viewed by others

Abbreviations

°C:

Celsius degree

CFD:

Computational fluid dynamics

IC:

Internal combustion

k:

Thermal conductivity of the fluid (W m−1 K)

Nu:

Nusselt number (–)

ON:

Octane number (–)

Opt.:

Optimum

rpm:

Engine speed (Rev. per minute)

TC:

Turbocharger

References

  1. Heywood JB. Internal combustion engine fundamentals. 1st ed. McGraw-Hill: New York; 1988.

    Google Scholar 

  2. Mitchell T, Salah M, Wagner J, Dawson D. Automotive thermostat valve configurations: enhanced warm-up performance. ASME J Dyn Syst Meas Control. 2009;131:044501.

    Article  Google Scholar 

  3. Picarelli A, Galindo E, Diaz G. Thermal shock testing for engines in dymola. In: Proceedings of the 10th international modelica conference, March 10–12, 2014, Lund, Sweden.

  4. Koch FW, Haubner FG. Cooling system development and optimization for DI engines. Warrendale: SAE International; 2000.

    Google Scholar 

  5. Mohamed ES. Development and analysis of a variable position thermostat for smartcooling system of a light duty diesel vehicles and engine emissions assessment during NEDC. Appl Therm Eng 2016;99:358–72.

    Article  CAS  Google Scholar 

  6. Haghighat AK, Roumi S, Madani N, Bahmanpour D, Olsen MG. An intelligent cooling system and control model for improved engine thermal management. Appl Therm Eng 2018;128:253–63.

    Article  CAS  Google Scholar 

  7. Kang H, Ahn H, Min K. Smart cooling system of the double loop coolant structure with engine thermal management modelling. Appl Therm Eng 2015;79:124–31.

    Article  Google Scholar 

  8. Mohamed ED. Design and experimental investigation on an electromagnetic engine valve train. SAE technical papers. 2011.

  9. Incropera FP, Dewitt DV, Bergman TL, Levine AS. Fundamentals of heat and mass transfer. 6th ed. New York: Wiley; 2012.

    Google Scholar 

  10. Wagner JR, Srinivasan V, Dawson DM, Marotta EE. Smart thermostat, coolant pump, control for engine thermal management systems. In: SAE, world congress & exhibition, Detroit, Michigan, USA; 2003.

  11. Li D, Wu Y, Liu C, Zhang G, Arici M. Numerical investigation of thermal and optical performance of window units filled with nanoparticle enhanced PCM. Int J Heat Mass Transf. 2018;125:1321–32.

    Article  CAS  Google Scholar 

  12. Li D, Wu Y, Liu C, Zhang G, Arici M. Energy investigation of glazed windows containing nano-PCM in different seasons. Energy Convers Manag. 2018;172:119–28.

    Article  CAS  Google Scholar 

  13. Baniamerian Z, Nazoktabar M, Mehdipour R. Simulation of boiling heat transfer within water jacket of 4-cylinder gasoline engine. Int J Eng IJE Trans C Asp. 2014;27(12):1928–35.

    Google Scholar 

  14. Pang SC, Kalam MA, Masjuki HH, Hazrat MA. A review on air flow and coolant flow circuit in vehicles’ cooling system. Int J Heat Mass Transf. 2012;55(23–24):6295–306.

    Article  Google Scholar 

  15. Cengel YA. Heat and mass transfer. 2nd ed. New York: McGraw-Hill; 2015. p. 466.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Mechanical Engineering, Roudehen Branch, Islamic Azad University, Roudehen, Iran

    Mohsen Nazoktabar & Hassan Mohammadkhani

  2. Department of Mechanical Engineering, Mazandaran Engineering Organization, Babol, Iran

    Kamran Arshtabar

Authors
  1. Mohsen Nazoktabar
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Kamran Arshtabar
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Hassan Mohammadkhani
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Mohsen Nazoktabar.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Nazoktabar, M., Arshtabar, K. & Mohammadkhani, H. Investigating the effect of coolant’s heat transfer type on thermostat placement. J Therm Anal Calorim 139, 2519–2526 (2020). https://doi.org/10.1007/s10973-019-08805-5

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10973-019-08805-5

Keywords

Search

Navigation