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

N.A.

Makale detayları

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

Yazarlar:

N.A.

Yayıncı:

Yildiz Technical University

Ana Başlıklar:

Thermodynamics and Statistical Physics

Dergi:

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

Belge Tipi:

Makale

Yayın Tarihi:

11/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001304965

pISSN:

2148-7847

Anahtar kelimeler:

Özet:

 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.

Makale detayları

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

Yazarlar:

N.A.

Yayıncı:

Yildiz Technical University

Ana Başlıklar:

Thermodynamics and Statistical Physics

Dergi:

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

Belge Tipi:

Makale

Yayın Tarihi:

11/2023

Belge Dili:

İngilizce

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

Sayı

Makale detayları

Yazarlar: N.A.

Yayıncı: Yildiz Technical University

Ana Başlıklar: Thermodynamics and Statistical Physics

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

Belge Tipi: Makale

Yayın Tarihi: 11/2023

Belge Dili: İngilizce

Document ID (Org No.): 2001304965

pISSN: 2148-7847

Sayı

Yazarlar:

N.A.

Yayıncı:

Yildiz Technical University

Ana Başlıklar:

Thermodynamics and Statistical Physics

Dergi:

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

Belge Tipi:

Makale

Yayın Tarihi:

11/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001304965

pISSN:

2148-7847