Sains Malaysiana 47(5)(2018): 1061–1067
http://dx.doi.org/10.17576/jsm-2018-4705-24
Energy, Exergy and
Efficiency Analysis of a Flat Plate Solar Collector Used as Air Heater
(Analisis Tenaga, Eksergi
dan Kecekapan Pengukur Solar Plat Rata yang Digunakan sebagai
Pemanas Air)
MUHAMMAD
HANIF1*,
MANSOOR
KHAN
KHATTAK1,
MAAZULLAH
KHAN2,
MUHAMMAD
RAMZAN1
& ABDURAB3
1Department
of Agricultural Mechanization, The University of
Agriculture Peshawar, 25130, Khyber Pakhtunkhwa, Pakistan
2Nuclear Institute for Food and
Agriculture, 25130 Peshawar, Pakistan
3Department
of Horticulture, The University of Agriculture
Peshawar, 25130 Khyber Pakhtunkhwa, Pakistan
Diserahkan: 3
April 2017/Diterima: 14 November 2017
ABSTRACT
Air heating by solar
collectors is renewable technology providing hot air for different purposes.
The present research emphasizes on analysis of energy, exergy and efficiency of
a flat plate solar air heater. The analysis model was tested on five different
air mass flow rates of 0.5 (Natural), 1.31, 2.11, 2.72 and 3.03 kgs-1 under
three different tilt angles of 25, 35 (Recommended) and 50o.
The data was replicated three times making a total of 45 treatments. A two
factorial completely randomized design was used to find if there is any
significant difference among the treatments. The results showed that the solar
collector gave better performance at air mass flow of 3.03
kgs-1 under tilt of 35o.
At maximum air mass flow rate of 3.03 kgs-1and optimum tilt angle of 35o the
maximum energetic efficiency of 51%, while minimum exergetic efficiency of 24% and maximum overall efficiency of 71% were recorded. It was
concluded that to get maximum thermal efficiencies of 71% from flat plate solar
collector used as an air heater must be operated at high air mass flow rates of
3.03 kgs-1under 35o tilt
angle at Peshawar, Pakistan.
Keywords: Efficiency;
energy; exergy; flat plate solar collector
ABSTRAK
Pemanasan udara oleh
pengumpul suria merupakan teknologi yang boleh diperbaharui yang menyediakan udara panas untuk tujuan
berbeza. Penyelidikan
yang terkini menekankan
tentang analisis tenaga, eksergi dan kecekapan plat rata pemanas udara solar.
Model analisis diuji
pada lima kadar
aliran jisim
udara yang berbeza iaitu 0.5 (semula jadi), 1.31, 2.11, 2.72 dan
3.03 kgs-1 di bawah
tiga sudut
kecondongan 25, 35 (disyorkan)
dan 50o. Data uji kaji diulang
sebanyak tiga
kali merangkumi 45 rawatan secara total. Reka bentuk dua
rawak faktorial digunakan untuk mencari perbezaan yang signifikan antara rawatan. Keputusan uji kaji
menunjukkan bahawa pengumpul suria memberikan prestasi yang lebih baik pada
aliran jisim
udara 3.03 kgs-1 di
bawah kecondongan 35o.
Pada kadar
aliran jisim maksimum
udara 3.03 kgs-1
dan sudut kecondongan
optimum 35o, keputusan kecekapan energetik maksimum ialah 51%, manakala kecekapan eksergi ialah minimum 24% dan kecekapan keseluruhan
maksimum pula ialah
71%. Kesimpulannya, untuk mendapatkan kecekapan terma maksimum 71% daripada pengumpul suria plat rata yang digunakan
sebagai pemanas udara, ia mesti
dikendalikan pada
kadar aliran jisim
udara tinggi
3.03 kgs-1
di bawah kecondongan
35o
di Peshawar, Pakistan.
Kata kunci: Eksergi;
kecekapan; pengumpul plat rata;
tenaga
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*Pengarang untuk surat-menyurat;
email: hanif_mechanization@aup.edu.pk