Exergetic analysis and comparative study of a roughened solar air heater using MATLAB

Ankit KUMAR

Makale detayları

Exergetic analysis and comparative study of a roughened solar air heater using MATLAB

Yazarlar:

Ankit KUMAR

Yayıncı:

Nisantasi University

Ana Başlıklar:

Uygulamalı fizik

Dergi:

International Journal of Engineering Science and Application 2017 Vol.1 Issue 3, pp.78-85

Belge Tipi:

Makale

Yayın Tarihi:

9/2017

Belge Dili:

Türkçe

Document ID (Org No.):

2000719195

Sıklık:

Aylık

eISSN:

2587-2176

pISSN:

2548-1185

Özet:

 


A
comparative study based on exergetic performance of two different types of
artificial roughness geometries on the absorber plate of solar air heater has
been presented. The performance evaluation in terms of thermal efficiency (ɳth),
effective efficiency (ɳeff), exergetic efficiency (ɳII)
and different exergy loss parameters has been carried out analytically, for
various values of temperature rise parameter (∆T/I) and relative roughness
height (e/D). The second law based exergy analysis is suitable for design of
rib roughened solar air heaters as it incorporates quality of useful energy
output and pumping power. The two roughness geometries are discrete W-shape rib
roughness and W-shape rib roughness have been selected. The correlations for
heat transfer and coefficient of friction developed by respective investigators
have been used to calculate efficiencies. It was investigated that discrete
W-shape rib roughness has better thermal efficiency (ɳth), effective
efficiency (ɳeff) and exergetic efficiency (ɳII) as
compared to the W-shape rib roughness. The optimum parameters are relative
roughness height (e/D) of 0.3375 at an angle of attack of 60º and isolation
value of 1000 w/m2. It was investigated that discrete W-shaped rib
roughness has 33% more exergetic efficiency then W-shaped rib roughness under
similar performance parameters such as aspect ratio (8), relative roughness
height (e/D) of 0.03375, angle of attack (α) of 60º, relative roughness pitch
(P/e) of 10 and isolation value of 1000 w/m2 with Reynolds number
ranges from 4000 to 14000. Curves of thermal efficiency (ɳth),
effective efficiency (ɳeff), exergetic efficiency (ɳII)
and different exergy loss parameters with respect to temperature rise parameter
(∆T/I) and relative roughness height (e/D) are also plotted.


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Makale detayları

Exergetic analysis and comparative study of a roughened solar air heater using MATLAB

Yazarlar: Ankit KUMAR

Yayıncı: Nisantasi University

Ana Başlıklar: Uygulamalı fizik

Dergi: International Journal of Engineering Science and Application 2017 Vol.1 Issue 3, pp.78-85

Belge Tipi: Makale

Yayın Tarihi: 9/2017

Belge Dili: Türkçe

Document ID (Org No.): 2000719195

Sıklık: Aylık

eISSN: 2587-2176

pISSN: 2548-1185

Sayı

Yazarlar:

Ankit KUMAR

Yayıncı:

Nisantasi University

Ana Başlıklar:

Uygulamalı fizik

Dergi:

International Journal of Engineering Science and Application 2017 Vol.1 Issue 3, pp.78-85

Belge Tipi:

Makale

Yayın Tarihi:

9/2017

Belge Dili:

Türkçe

Document ID (Org No.):

2000719195

Sıklık:

Aylık

eISSN:

2587-2176

pISSN:

2548-1185