The Thermal Performance of The Plate-fin Heat Sink under Natural Convection at Different Power Levels and Ambient Temperatures

Mesut Abuşka; Vahit Çorumlu

Makale detayları

The Thermal Performance of The Plate-fin Heat Sink under Natural Convection at Different Power Levels and Ambient Temperatures

Yazarlar:

Mesut Abuşka | Vahit Çorumlu

Yayıncı:

Manisa Celal Bayar University

Ana Başlıklar:

Enerji

Dergi:

Celal Bayar Üniversitesi Fen Bilimleri Dergisi Vol.20 Issue 3, pp.91-99

Belge Tipi:

Makale

Yayın Tarihi:

9/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001328603

pISSN:

1305-130X

Anahtar kelimeler:

Özet:

 The thermal performance of a flat heat sink and a plate-fin heat sink was experimentally compared under natural convection conditions at thermal powers of 16.5 W and 33 W and ambient temperatures of 30C and 40C. For the same heating powers, surface and junction temperatures increased as the ambient temperature rose from 30C to 40C, but the increase was not as much as the ambient temperature change. For the flat heat sink, the increase in junction temperature was 5C at 16.5 W and 6.68C at 33 W. For the plate-fin heat sink, the increase in junction temperature was 3.55C at 16.5 W and 4.47C at 33 W. The increase in surface temperature for the flat heat sink was 5.35C at 16.5 W and 5.91C at 33 W, while for the plate-fin heat sink, the surface temperature increase was 4.76C at 16.5 W and 2.22C at 33 W. The thermal resistance of the flat heat sink was around 4 KW, while for the plate-fin heat sink, it ranged between 2-2.5 KW, providing approximately twice the advantage in thermal resistance for the plate-fin model compared to the flat model. Under all conditions, the Rayleigh number Ra significantly decreased with the increase in ambient temperature but increased with the applied thermal power. Thus, the increase in Rayleigh number with power was more pronounced in the plate-fin model, indicating a more significant effect. In the plate-fin model, the fin efficiency slightly decreased with the increase in ambient temperature, from 0.63 to 0.62 at 16.5 W and from 0.65 to 0.64 at 33 W.

 The thermal performance of a flat heat sink and a plate-fin heat sink was experimentally compared under natural convection conditions at thermal powers of 16.5 W and 33 W and ambient temperatures of 30C and 40C. For the same heating powers, surface and junction temperatures increased as the ambient temperature rose from 30C to 40C, but the increase was not as much as the ambient temperature change. For the flat heat sink, the increase in junction temperature was 5C at 16.5 W and 6.68C at 33 W. For the plate-fin heat sink, the increase in junction temperature was 3.55C at 16.5 W and 4.47C at 33 W. The increase in surface temperature for the flat heat sink was 5.35C at 16.5 W and 5.91C at 33 W, while for the plate-fin heat sink, the surface temperature increase was 4.76C at 16.5 W and 2.22C at 33 W. The thermal resistance of the flat heat sink was around 4 KW, while for the plate-fin heat sink, it ranged between 2-2.5 KW, providing approximately twice the advantage in thermal resistance for the plate-fin model compared to the flat model. Under all conditions, the Rayleigh number Ra significantly decreased with the increase in ambient temperature but increased with the applied thermal power. Thus, the increase in Rayleigh number with power was more pronounced in the plate-fin model, indicating a more significant effect. In the plate-fin model, the fin efficiency slightly decreased with the increase in ambient temperature, from 0.63 to 0.62 at 16.5 W and from 0.65 to 0.64 at 33 W.

 The thermal performance of a flat heat sink and a plate-fin heat sink was experimentally compared under natural convection conditions at thermal powers of 16.5 W and 33 W and ambient temperatures of 30C and 40C. For the same heating powers, surface and junction temperatures increased as the ambient temperature rose from 30C to 40C, but the increase was not as much as the ambient temperature change. For the flat heat sink, the increase in junction temperature was 5C at 16.5 W and 6.68C at 33 W. For the plate-fin heat sink, the increase in junction temperature was 3.55C at 16.5 W and 4.47C at 33 W. The increase in surface temperature for the flat heat sink was 5.35C at 16.5 W and 5.91C at 33 W, while for the plate-fin heat sink, the surface temperature increase was 4.76C at 16.5 W and 2.22C at 33 W. The thermal resistance of the flat heat sink was around 4 KW, while for the plate-fin heat sink, it ranged between 2-2.5 KW, providing approximately twice the advantage in thermal resistance for the plate-fin model compared to the flat model. Under all conditions, the Rayleigh number Ra significantly decreased with the increase in ambient temperature but increased with the applied thermal power. Thus, the increase in Rayleigh number with power was more pronounced in the plate-fin model, indicating a more significant effect. In the plate-fin model, the fin efficiency slightly decreased with the increase in ambient temperature, from 0.63 to 0.62 at 16.5 W and from 0.65 to 0.64 at 33 W.

 The thermal performance of a flat heat sink and a plate-fin heat sink was experimentally compared under natural convection conditions at thermal powers of 16.5 W and 33 W and ambient temperatures of 30C and 40C. For the same heating powers, surface and junction temperatures increased as the ambient temperature rose from 30C to 40C, but the increase was not as much as the ambient temperature change. For the flat heat sink, the increase in junction temperature was 5C at 16.5 W and 6.68C at 33 W. For the plate-fin heat sink, the increase in junction temperature was 3.55C at 16.5 W and 4.47C at 33 W. The increase in surface temperature for the flat heat sink was 5.35C at 16.5 W and 5.91C at 33 W, while for the plate-fin heat sink, the surface temperature increase was 4.76C at 16.5 W and 2.22C at 33 W. The thermal resistance of the flat heat sink was around 4 KW, while for the plate-fin heat sink, it ranged between 2-2.5 KW, providing approximately twice the advantage in thermal resistance for the plate-fin model compared to the flat model. Under all conditions, the Rayleigh number Ra significantly decreased with the increase in ambient temperature but increased with the applied thermal power. Thus, the increase in Rayleigh number with power was more pronounced in the plate-fin model, indicating a more significant effect. In the plate-fin model, the fin efficiency slightly decreased with the increase in ambient temperature, from 0.63 to 0.62 at 16.5 W and from 0.65 to 0.64 at 33 W.

Makale detayları

The Thermal Performance of The Plate-fin Heat Sink under Natural Convection at Different Power Levels and Ambient Temperatures

Yazarlar: Mesut Abuşka | Vahit Çorumlu

Yayıncı: Manisa Celal Bayar University

Ana Başlıklar: Enerji

Dergi: Celal Bayar Üniversitesi Fen Bilimleri Dergisi Vol.20 Issue 3, pp.91-99

Belge Tipi: Makale

Yayın Tarihi: 9/2024

Belge Dili: İngilizce

Document ID (Org No.): 2001328603

pISSN: 1305-130X

heat sink

plate-fin

natural convection

ambient temperature

power

Sayı

Yazarlar:

Mesut Abuşka | Vahit Çorumlu

Yayıncı:

Manisa Celal Bayar University

Ana Başlıklar:

Enerji

Dergi:

Celal Bayar Üniversitesi Fen Bilimleri Dergisi Vol.20 Issue 3, pp.91-99

Belge Tipi:

Makale

Yayın Tarihi:

9/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001328603

pISSN:

1305-130X