Analisis Teknis Kolektor Surya Tipe Pelat Datar Glazed dan Unglazed pada Berbagai Laju Aliran Debit dan Suhu Inlet

Rustam Efendi, Leopold Oscar Nelwan, Dyah Wulandani

Abstract


Abstract
Researches on glazed and unglazed flat plate type solar collectors have been carried out previously for the purposes of water heaters and air heaters. However, studies related to the comparison of glazed and unglazed solar collectors especially to heat air suitable for rice drying have not been carried out yet. The purpose of this study was to compare the performance of glazed and unglazed solar collectors in the same weather conditions to heating the water for various water flow rates and inlet temperatures. The research approach used in this study is the experimental approach. Parameters measured include inlet temperature, outlet temperature, ambient temperature, flow rate, wind speed, and irradiation. The collector test uses four collectors (two unglazed and two glazed). The test results show that the highest efficiency is shown by
the glazed collectors, which is 63%, while the unglazed collector efficiency is 54%. Both of the efficiencies occured at a flow rate of 3 liters/minute, inlet temperature of 40°C and at noon time. The cost per watt (useful energy) of glazed flat plate solar collector was less than unglazed flat plate solar collector.

Abstrak
Salah satu cara untuk memanfaatkan energi surya adalah dengan menggunakan kolektor surya sebagai alat untuk mengubah energi matahari menjadi energi panas. Penelitian tentang kolektor surya tipe plat datar glazed dan unglazed telah dilakukan sebelumnya untuk keperluan pemanas air dan pemanas udara. Namun, studi yang terkait dengan kombinasi kolektor surya glazed dan unglazed khususnya yang akan digunakan untuk pemanasan udara yang sesuai dengan gabah belum dilakukan. Tujuan dari penelitian ini adalah untuk membandingkan kinerja kolektor surya glazed dan unglazed dalam kondisi cuaca yang sama
untuk memanaskan air pada berbagai laju aliran air dan suhu inlet. Pendekatan penelitian yang digunakan dalam penelitian ini adalah pendekatan eksperimental, dimana data diperoleh dari proses pengukuran di lapangan. Parameter yang diukur meliputi suhu inlet, suhu outlet, suhu lingkungan, laju aliran, kecepatan angin dan iradiasi surya. Pengujian kolektor menggunakan empat buah kolektor (dua glazed dan dua unglazed). Hasil pengujian menunjukkan bahwa pada kolektor glazed, efisiensi tertingginya adalah 63%, sedangkan kolektor unglazed adalah 54%. Kedua efisiensi tersebut terjadi laju aliran 3 liter/menit dan suhuinlet 40°C dan waktu tengah hari. Biaya per watt (energi berguna) kolektor surya pelat datar glazed lebih rendah daripada kolektor surya pelat datar unglazed.


Keywords


glazed and unglazed solar collector, solar collector efficiency, useful energy, inlet temperature, flow rate

Full Text:

PDF

References


Agbo S., E. Okoroigwe. 2007. Analysis of

thermal losses in the flat-plate collector of a

Thermosyphon Solar water Heater. R J Phys

(1):35-41.

Akhtar N., S.C. Mullick. 2012. Effect of absorption of

solar radiation in glass-cover(s) on heat transfer

coefficients in upward heat flow in single and

double glazed flat-plate collectors. Int J Heat

Mass Tran 55(1-3):125-132. doi:10.1016/j.

ijheatmasstransfer.2011.08.048

Al-damook A., W.H. Khalil. 2017. Experimental

evaluation of an unglazed solar air collector for

building space heating in Iraq. Renew Energ

:498-509. doi:https://doi.org/10.1016/j.

renene.2017.05.051

[ASHRAE ] American Society of Heating. 2003.

Methods of Testing to Determine the Thermal

Performance of Solar Collectors, Refrigeration,

and Air Conditioning Engineers. Atlanta [GA].

Arata, A.A., R.W. Geddes. 1985. Combination

of flat-plate solar collectors of different

performance. Int J Sol Energ 3(6):355-371.

doi:10.1080/01425918508914404

Bakari, R., R.J.A., Minja, K.N. Njau. 2014. Effect of

glass thickness on performance of flat plate solar

collectors for fruits drying. J Energy 2014:1-8.

doi:10.1155/2014/247287

Belessiotis, V., E. Delyannis. 2011. Solar drying.

Sol Energy 85(8):1665-1691. doi:10.1016/j.

solener.2009.10.001

Cengel, Y.A., A.J. Ghajar. 2003. Heat and Mass

Transfer : Fundamentals & Applications. 5thEd.

McGraw-Hill Education. New York

Duffie, J.A., W.A. Beckman. 1980. Solar Engineering

Of Thermal Processes. 4thEd. J Wiley. New York

Gupta, H.K., G.D. Agrawal, J. Mathur. 2015.

Investigations for effect of Al2O3–H2O nanofluid

flow rate on the efficiency of direct absorption solar

collector. Case Studies in Thermal Engineering

:70-78. doi:10.1016/j.csite.2015.01.002

Iceri, D.M., S.D.R. Oliveira, V.L. Scalon. 2013.

Comparative analysis for glazed and unglazed

collector for used in solar domestic hot

watersystems. [Internet]. 22nd International

Congress of Mechanical Engineering (COBEM

; November 3-7 2013; Brazile (BR): ABCM.

hlm 2941-2951.

Ihaddadene, N., R. Ihaddadene, A. Mahdi. 2014.

Effect of glazing number on the performance of

a solar thermal collector. IJSR:1-6.

Kalogirou S.A. 2009. Solar Energy Engineering:

Processes and Systems. Academic Press.

Khalil, F.I, L.O.Nelwan, I.D.M. Subrata. 2016.

Desain sistem kendali untuk pengering gabah

dengan kolektor surya dan penyimpan panas.

Jurnal Keteknikan Pertanian 4 (1):87 - 96

Kumar S., S.C. Mullick. 2010. Wind heat transfer

coefficient in solar collectors in outdoor

conditions. Sol Energy 84(6):956-963.

doi:10.1016/j.solener.2010.03.003

Kutscher, C.F., C.B. Christensen, G.M. Barker.

Unglazed transpired solar collectors:

Heat loss theory. J Sol Energ 115(3):182-188.

doi:10.1115/1.2930047

Nelwan, L.O., I.D.M. Subrata, D. Wulandani.

Pengembangan pengering surya untuk

gabah menggunakan optimisasi kombinasi

kolektor datar glazed dan unglazed serta sistem

penyimpanan termal. Prosiding Seminar Hasil-

Hasil Penelitian IPB.

William, T.R. 2013. Experimental Investigation

of The Performance of Abuilding Integrated

Thermal Solar Collector for Domestic Water

Heating [Tesis]. The University of Waikato.

Tirtoatmodjo, R., E.A. Handoyo. 1999. Unjuk kerja

pemanas air jenis kolektor surya plat datar

dengan satu dan dua kaca penutup. J Tek Mesin

(2):pp. 116-121.

Vettrivel, H., P. Mathiazhagan. 2017. Comparison

study of solar flat plate collector with single and

double glazing systems. IJRER 7(1):266-274.




Copyright (c) 2019 Jurnal Keteknikan Pertanian

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

Alamat Redaksi: 
Jurnal Keteknikan Pertanian, Departemen Teknik Mesin dan Biosistem, Institut Pertanian Bogor, Kampus IPB Darmaga, Bogor 16680. Telp. 0251-8623026; Fax: 0251-8623026; Email: jurnaltep@yahoo.com  website: http://journal.ipb.ac.id/index.php/jtep 

 

This journal is published under the terms of Creative Commons Attribution 4.0 International License.