The evaluation of the performance of the heat exchanger of a triple concentric tube configuration with ionic liquid (imidazolium) and MWCNT ionanofluid

N.A.

Article Details

The evaluation of the performance of the heat exchanger of a triple concentric tube configuration with ionic liquid (imidazolium) and MWCNT ionanofluid

Authors:

N.A.

Publisher:

Yildiz Technical University

Main Topics:

Thermodynamics and Statistical Physics

Journal:

Journal of Thermal Engineering Vol.9 Issue 6, pp.1452-1465

Document Type:

Article

Publication Date:

11/2023

Document Language:

English

Document ID (Org No.):

2001304965

pISSN:

2148-7847

Keywords:

Abstract:

 In this study, a triple concentric tube heat exchanger TCTHE was designed. It had three copper concentric tubes. Their thicknesses were 0.762 mm, 1.143 mm, and 1.27 mm. The diameters were 9.525 mm, 22.25 mm, and 34.925 mm, respectively. The tubes length was 670 mm. The cooling medium used was the ionic-liquid IL 1-Ethyl-3-methylimidazoliumtetra-flouraborate EMIMBF4 and the ionanofluid INF prepared of 0.5 Multi walled carbon nanotubes MWCNT in EMIMBF4, while oil forty stock was the hot fluid, to investigate TCTHE performance. The volumetric flow rate VFR of the cooling medium was 20-55 lhr, with a 25-27 C temperature temp. VFR of the hot fluid was constant and equal 20 lhr. The inlet oil temp was 50, 60, and 70 oC, respectively. The type of flow was countercurrent. The heat transfer was investigated by calculating different parameters for the cooling medium. There was an improvement in the Nusselt number NU of INF of 5 compared to the IL. A 75 increase in the friction factor of INF was found compared to that of IL. A 95 increase in the pressure drop was calculated in the inner tube using INF compared with that of IL. The overall heat transfer coefficient U was enhanced by 3 using INF in comparison with IL. Fi-nally, U showed some improvement, resulting in increased heat transfer. In conclusion, using the prepared INF lead to improve the heat transfer in the TCTHE.

 In this study, a triple concentric tube heat exchanger TCTHE was designed. It had three copper concentric tubes. Their thicknesses were 0.762 mm, 1.143 mm, and 1.27 mm. The diameters were 9.525 mm, 22.25 mm, and 34.925 mm, respectively. The tubes length was 670 mm. The cooling medium used was the ionic-liquid IL 1-Ethyl-3-methylimidazoliumtetra-flouraborate EMIMBF4 and the ionanofluid INF prepared of 0.5 Multi walled carbon nanotubes MWCNT in EMIMBF4, while oil forty stock was the hot fluid, to investigate TCTHE performance. The volumetric flow rate VFR of the cooling medium was 20-55 lhr, with a 25-27 C temperature temp. VFR of the hot fluid was constant and equal 20 lhr. The inlet oil temp was 50, 60, and 70 oC, respectively. The type of flow was countercurrent. The heat transfer was investigated by calculating different parameters for the cooling medium. There was an improvement in the Nusselt number NU of INF of 5 compared to the IL. A 75 increase in the friction factor of INF was found compared to that of IL. A 95 increase in the pressure drop was calculated in the inner tube using INF compared with that of IL. The overall heat transfer coefficient U was enhanced by 3 using INF in comparison with IL. Fi-nally, U showed some improvement, resulting in increased heat transfer. In conclusion, using the prepared INF lead to improve the heat transfer in the TCTHE.

 In this study, a triple concentric tube heat exchanger TCTHE was designed. It had three copper concentric tubes. Their thicknesses were 0.762 mm, 1.143 mm, and 1.27 mm. The diameters were 9.525 mm, 22.25 mm, and 34.925 mm, respectively. The tubes length was 670 mm. The cooling medium used was the ionic-liquid IL 1-Ethyl-3-methylimidazoliumtetra-flouraborate EMIMBF4 and the ionanofluid INF prepared of 0.5 Multi walled carbon nanotubes MWCNT in EMIMBF4, while oil forty stock was the hot fluid, to investigate TCTHE performance. The volumetric flow rate VFR of the cooling medium was 20-55 lhr, with a 25-27 C temperature temp. VFR of the hot fluid was constant and equal 20 lhr. The inlet oil temp was 50, 60, and 70 oC, respectively. The type of flow was countercurrent. The heat transfer was investigated by calculating different parameters for the cooling medium. There was an improvement in the Nusselt number NU of INF of 5 compared to the IL. A 75 increase in the friction factor of INF was found compared to that of IL. A 95 increase in the pressure drop was calculated in the inner tube using INF compared with that of IL. The overall heat transfer coefficient U was enhanced by 3 using INF in comparison with IL. Fi-nally, U showed some improvement, resulting in increased heat transfer. In conclusion, using the prepared INF lead to improve the heat transfer in the TCTHE.

 In this study, a triple concentric tube heat exchanger TCTHE was designed. It had three copper concentric tubes. Their thicknesses were 0.762 mm, 1.143 mm, and 1.27 mm. The diameters were 9.525 mm, 22.25 mm, and 34.925 mm, respectively. The tubes length was 670 mm. The cooling medium used was the ionic-liquid IL 1-Ethyl-3-methylimidazoliumtetra-flouraborate EMIMBF4 and the ionanofluid INF prepared of 0.5 Multi walled carbon nanotubes MWCNT in EMIMBF4, while oil forty stock was the hot fluid, to investigate TCTHE performance. The volumetric flow rate VFR of the cooling medium was 20-55 lhr, with a 25-27 C temperature temp. VFR of the hot fluid was constant and equal 20 lhr. The inlet oil temp was 50, 60, and 70 oC, respectively. The type of flow was countercurrent. The heat transfer was investigated by calculating different parameters for the cooling medium. There was an improvement in the Nusselt number NU of INF of 5 compared to the IL. A 75 increase in the friction factor of INF was found compared to that of IL. A 95 increase in the pressure drop was calculated in the inner tube using INF compared with that of IL. The overall heat transfer coefficient U was enhanced by 3 using INF in comparison with IL. Fi-nally, U showed some improvement, resulting in increased heat transfer. In conclusion, using the prepared INF lead to improve the heat transfer in the TCTHE.

Article Details

The evaluation of the performance of the heat exchanger of a triple concentric tube configuration with ionic liquid (imidazolium) and MWCNT ionanofluid

Authors:

N.A.

Publisher:

Yildiz Technical University

Main Topics:

Thermodynamics and Statistical Physics

Journal:

Journal of Thermal Engineering Vol.9 Issue 6, pp.1452-1465

Document Type:

Article

Publication Date:

11/2023

Document Language:

English

Document ID (Org No.):

2001304965

pISSN:

2148-7847

[EMIM][BF4]

Friction Factor

Ionic Liquid

Ionanofluid

Mwcnts

Nusselt Number

Overall Heat Transfer Coefficient

Pressure Drop

Triple Concentric Heat Exchanger

Issues

Article Details

Authors: N.A.

Publisher: Yildiz Technical University

Main Topics: Thermodynamics and Statistical Physics

Journal: Journal of Thermal Engineering Vol.9 Issue 6, pp.1452-1465

Document Type: Article

Publication Date: 11/2023

Document Language: English

Document ID (Org No.): 2001304965

pISSN: 2148-7847

Issues

Authors:

N.A.

Publisher:

Yildiz Technical University

Main Topics:

Thermodynamics and Statistical Physics

Journal:

Journal of Thermal Engineering Vol.9 Issue 6, pp.1452-1465

Document Type:

Article

Publication Date:

11/2023

Document Language:

English

Document ID (Org No.):

2001304965

pISSN:

2148-7847