scholarly journals Incidental Solar Radiation According to the Solar Collector Slope - Horizontal Measurements Conversion on an Inclined Panel Laws

2009 ◽  
Vol 2 (1) ◽  
pp. 52-58 ◽  
Author(s):  
Romdhane Ben Slama
Keyword(s):  
Solar Radiation ◽  
Solar Collector

Experimental and Theoretical Investigation of Performance of a Solar Chimney Model, Part I: Experimental Investigation

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Essaied M Shuia ◽  
Bashir H Arebi ◽  
Ibrahim A abuashe
Keyword(s):  
Experimental Data ◽  
Wind Speed ◽  
Solar Radiation ◽  
Air Temperature ◽  
Solar Collector ◽  
Experimental Results ◽  
Internal Diameter ◽  
Solar Chimney ◽  
Air Velocity ◽  
Collector Temperature

This paper presents the experimental data that was collected from small pilot solar chimney. The experimental data together with ambient conditions are used to evaluate the performance and study the behavior of the solar chimney; this data will be used for comparison with theoretical models in another paper [part II). The solar chimney prototype was designed and constructed at the Subrata Faculty of Engineering-Libya. The data were collected over several days of June 2011. The solar chimney system contains two main components; the solar collector and the solar chimney. The solar collector root‘ has a circular area of126 m3, the solar chimney is a PVC tube with internal diameter of 0.2 m and the total height of chimney is 9.3 m. The measurements include the intensity of solar radiation inside/outside the collector, temperature and velocity of air at the entrance of the chimney, temperature and speed of wind outside the collector, temperature of the ground inside collector al1d temperature measurements of air at speci?c points at different levels throughout the collector. Solar irradiance was found to affect the chimney temperature and subsequently affects chimney air velocity. The experimental results showed that temperature differences of (30 - 45°C) were recorded between the ambient temperature and that of air inside the chimney in the middle of the day, where the highest air temperature of 73.4°C was recorded at the entrance of the solar chimney. The maximum air velocity of 3.6 m/s was recorded inside the solar chimney at noon on 9 June. Wind speed outside the collector had a small effect on the speed of the air inside the chimney and tends to change slightly, hence, can neglect influence of wind speed on the performance of the system. Also the experimental results indicate that such type of system can trap a suf?cient amount of solar radiation, which elevates the air temperature to a suf?cient value able to generate enough air ?ow to operate a wind turbine to produce electricity; this means the solar chimney system for electricity production can work in the north-western part of Libya in the summer time at least.

Maximisation and Optimisation of the Total Solar Radiation Reaching the Solar Collector Surfaces

2015 ◽  
pp. 873-886 ◽  
Author(s):  
Kacem Gairaa ◽  
Abdallah Khellaf ◽  
Farouk Chellali ◽  
Said Benkaciali ◽  
Yahia Bakelli ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Solar Collector ◽  
Total Solar Radiation

scholarly journals Numerical simulation of concentrating solar collector P2CC with a small concentrating ratio

2012 ◽  
Vol 16 (suppl. 2) ◽  
pp. 471-482 ◽  
Author(s):  
Velimir Stefanovic ◽  
Sasa Pavlovic ◽  
Marko Ilic ◽  
Nenad Apostolovic ◽  
Dragan Kustrimovic
Keyword(s):  
Mathematical Model ◽  
Fluid Flow ◽  
Solar Radiation ◽  
Solar Energy ◽  
Radiation Intensity ◽  
Solar Collector ◽  
Numerical Procedure ◽  
Working Fluid ◽  
Flow Rates ◽  
Solar Radiation Intensity

Solar energy may be practically utilized directly through transformation into heat, electrical or chemical energy. A physical and mathematical model is presented, as well as a numerical procedure for predicting thermal performances of the P2CC solar concentrator. The demonstrated prototype has the reception angle of 110? at concentration ratio CR = 1.38, with the significant reception of diffuse radiation. The solar collector P2CC is designed for the area of middle temperature conversion of solar radiation into heat. The working fluid is water with laminar flow through a copper pipe surrounded by an evacuated glass layer. Based on the physical model, a mathematical model is introduced, which consists of energy balance equations for four collector components. In this paper, water temperatures in flow directions are numerically predicted, as well as temperatures of relevant P2CC collector components for various values of input temperatures and mass flow rates of the working fluid, and also for various values of direct sunlight radiation and for different collector lengths. The device which is used to transform solar energy to heat is referred to as solar collector. This paper gives numerical estimated changes of temperature in the direction of fluid flow for different flow rates, different solar radiation intensity and different inlet fluid temperatures. The increase in fluid flow reduces output temperature, while the increase in solar radiation intensity and inlet water temperature increases output temperature of water. Furthermore, the dependence on fluid output temperature is determined, along with the current efficiency by the number of nodes in the numerical calculation.

Regeneration Characteristics of Adsorbent in the Integrated Desiccant/Collector

1993 ◽  
Vol 115 (3) ◽  
pp. 169-175 ◽  
Author(s):  
Y. Saito
Keyword(s):  
Solar Radiation ◽  
Solar Energy ◽  
Heat Source ◽  
Silica Gel ◽  
Solar Collector ◽  
Efficient Regeneration

This study presents a solar desiccant system using an adsorbent in an “integrated desiccant/solar collector” that uses direct solar energy as a heat source for efficient regeneration of the adsorbent. The objective of this study is to investigate an integrated desiccant/collector in which the adsorbent absorbs solar radiation fully and is heated for regeneration. Another objective is to obtain the regeneration characteristics in the equipment proposed by both experiments and simulations. Throughout this study, silica gel is used as the adsorbent.

Mathematical modeling of the thermofluid characteristics of solar collector for variable solar radiation in climatic condition of Bangladesh

2018 ◽  
Author(s):  
Md. Anowar Hossain ◽  
K. M. Ariful Kabir ◽  
M. M. A. Sarker
Keyword(s):  
Mathematical Modeling ◽  
Solar Radiation ◽  
Solar Collector ◽  
Climatic Condition

Effects of Aspect Ratios on Average Daily Solar Energy Collection for Different Flat-Plate Collector Arrays in Winter Months

2013 ◽  
Vol 368-370 ◽  
pp. 1228-1231
Author(s):  
Fen E Hu ◽  
Sheng Xian Wei ◽  
Neng Bang Hou
Keyword(s):  
Solar Radiation ◽  
Solar Energy ◽  
Aspect Ratio ◽  
Flat Plate ◽  
Solar Collector ◽  
Radiation Model ◽  
Aspect Ratios ◽  
Solar Radiation Model ◽  
Flat Plate Collector

A solar radiation model to determine solar energy collection on solar collector array with different aspect ratios has been developed. The relations between the aspect ratio and the average daily solar radiation collection on the collector array have been deeply studied. The results show that there is an optimum aspect ratio to maximize the solar energy collection on the collector arrays. The optimum aspect ratios of the 1000 m2 collector array for Haikou, Kunming, Lhasa and Beijing are 10/1, 1/3, 5/1 and 10/1.The optimum aspect ratios of 1000 m2, 500 m2, 200 m2 and 100 m2 collector arrays for Kunming are 1/3, 3/1, 7/1 and 1/5, respectively.

scholarly journals The effect of psychrometry on the performance of a solar collector

2021 ◽  
Author(s):  
Alok Dhaundiyal ◽  
Gedion H. Gebremicheal
Keyword(s):  
Solar Radiation ◽  
Solar Collector ◽  
Thermal Design ◽  
Specific Humidity ◽  
Entropy Generation Rate ◽  
Stagnation Temperature ◽  
Absorber Plate ◽  
Carrier Fluid ◽  
Collector Plate ◽  
Flow Energy

AbstractThe investigation of a solar collector is based on the thermal behaviour of a carrier fluid and the degradation of energy across a flat plate collector. The exergy analysis of a thermal system includes the change in the exergy function of a carrier fluid while transferring solar radiation across an air gap. The cell cast acrylic glass was used to transmit the incident solar radiation to the absorber plate, and to safeguard the absorber plate from the outside environment. With the help of the steady flow energy equation, the enthalpy of the carrier fluid (moist air) was calculated. The specific humidity of the incoming air was calculated at an average dry bulb temperature of 299.4 K. The stagnation temperature at a limiting condition was also estimated to find out the maximum permissible limit for a given thermal design. The mass flow rate of air was assumed to be 5.2 g-s−1. The efficiency of the solar collector was found to vary from 40 to 42%, whereas the thermal energy available for drying was 15–59% of the exergy of the carrier fluid. The net entropy generation rate due to the collector plate was calculated to be 0.12 W-K−1.

scholarly journals Research and Calculation of the Coefficient for the Solar Radiation of a Flat Solar Collector

2019 ◽  
Vol 14 (20) ◽  
pp. 7685-7692
Author(s):  
Yedilkhan Amirgaliyev ◽  
Murat Kunelbayev ◽  
Aliya Kalizhanova ◽  
Didar Yedilkhan ◽  
Omirlan Auelbekov ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Solar Collector

scholarly journals Pengaruh Kolektor Pelat Gelombang Dengan Dua Kaca Penutup Terhadap Penambahan Panas Untuk Meningkatkan Kinerja Solar Water Heater

2019 ◽  
Vol 3 (2) ◽  
Author(s):  
Dian Kusuma ◽  
Mustafa . ◽  
Sudarno .
Keyword(s):  
Solar Radiation ◽  
Solar Collector ◽  
Thermal Processes ◽  
Solar Water Heater ◽  
Water Heater ◽  
Cover Glass ◽  
Solar Water ◽  
Solar Engineering ◽  
C 50 ◽  
Initial Heat

The worked principle of solar collector wave absorber plate was to transfer solar radiation to the worked fluid. The solar radiation that falls on the first glass was partially reflected, then on the second glass partially absorbed by the absorbent plate. The heat absorbed by the absorbent plate will be used to heat the worked fluid (water) between the absorbent plate and the storage plate. The purpose of this research was to design and make solar collector used wave plate with two cover glass. The addition of incomed water heat used temperatures of 30 ° C, 40 ° C, 50 ° C. The method used was used an expriment by analyzed the effect of initial heat addition on efficiency. From the results of test data obtained collector performance of solar water heater the greater the addition of heat used then the smaller the efficiency. Each of the average heat additions efficiency at 30 ° C was 19.66%, the temperature of 40 ° C was 17.75%, and the temperature of 50 ° C was 12.23%.Keywords : wave absorbent plate, added heat, solar water heaterAnonim, 2017: wibe site: unmermadiun.ac.id, tanggal 26 Agustus 2017.Anonim. Bab II Landasan Teori Prinsip Kerja Kolektor suryaPelatPenyerap. 809b5f3ff5dc603fbc474afe006faef2,Tanggal 16 Mei 2017.Anggraini, Ekadewi Handoyo, 2002: Jurnal Teknik Mesin Universitas PETRA, Surabaya.Arismunandar, W. 1995. Teknologi Rekayasa Surya. edisi pertama. PT Pradnya Paramita. Jakarta.Burhanuddin, A. 2006. Karakteristik kolektor surya pelat datar dengan variasi jarak kaca penutup dan sudut kemiringan kolektor. Skripsi. Fakultas Matematika dan Ilmu Pengetahuan Alam  Universitas Sebelas Maret, Surakarta.Beizer, 1981, Konsep Fisika Modern. Jilid 3. Terjemahan The Houw Liong Ph.D, Penerbit Erlangga, Jakarta.Culp, 1991, Prinsip-prinsip Konversi Energi, Penerbit Erlangga, Jakarta.Duffie, dan Beckman. , 1991: Solar Engineering of Thermal Processes, John Willey and Sons Inc, Wisconsin.Giancoli, 1998: Fisika edisi kelima (Terjemahan Yuhilza Hanum), Erlangga, Jakarta.Jasjfi, 1995: Perpindahan kalor, Erlangga, Jakarta.Lunde, 1980, jbptitbpp-gdl-rahadianef-30837—2008ta-2.pdf, Bab II, Teori dasar 8.Maftukhil Murot, dkk., 2016. Pengaruh Penambahan Tekanan Diatas Pelat Penyerap Terhadap Kinerja Solar Water Heater Sederhana, Widya Teknika, Vol. 24, N0. 2: 20-32.Mustofa, 2008, Studi Eksperimen Pengaruh pelat penyerap ganda model gelombang dengan penambahan reflektor terhadap kinerja Solar Water Heater sederhana, Dosen Teknik Mesin, Universitas Merdeka Madiun.Mustofa, Ismail N. R., 2013, International Jurnal of Research in Engineering and Technologi, volume.02, Issue.09, September 2013.Prijono, 1986, Prinsip-prinsip Perpindahan Panas, Penerbit Erlangga, Jakarta.Rahadian, 2008 : Jurnal Teknik Mesin Universitas Sumatra Utara.Sijabat, Andri M. 2014. Rancang Bangun dan Analisa Kolektor Surya Tipe Pelat Datar Bersirip Untuk Penghasil Panas Pada Pengering Hasil Pertanian dan Perkebunan. Skripsi. Fakultas Teknik Universitas Sumatra Utara, Medan.Subur Edi S., Irfan Santoso. 2014. Jurnal Teknologi: Perancangan Solar Water Heater Jenis Pelat Datar Temperatur Medium Untuk Aplikasi Penghangat Air Mandi. Volume 7 Nomor 2: 118-127.Tirtoatmodjo, R., Ekadewi, A. H, 1999: Jurnal Teknik Mesin Universitas Kristen Petra

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