scholarly journals ANALISIS PERBANDINGAN UNJUK KERJA PEMANAS AIR TENAGA SURYA TIPE PLAT DATAR DENGAN SISTEM SINGLE DAN DOUBLE CUTOFF

POROS ◽  
2017 ◽  
Vol 14 (1) ◽  
pp. 28
Author(s):  
Ivan Budiman ◽  
I Made Kartika ◽  
Abrar Riza
Keyword(s):  
Solar Energy ◽  
Temperature Difference ◽  
Solar Collector ◽  
Warm Water ◽  
The Sun ◽  
Human Being ◽  
Photothermal Conversion ◽  
Glass Cover

Abstract: Warm water is needed by human being to take a bath, wash their clothes, their dishes etc. By the photothermal conversion, the solar energy can be used to heat the water. Flat solar collector is a tool which is used to capture energy of the sun radiation then convert it into heat to heat up water in collector’s pipes. The number of glass cover used effects the performance and efficiency of the collector. From this research, it is found that the efficiency of the collector is better when the cover used are two glasses than one glasses. The temperature difference of incoming and outgoing water in the collector using two glasses 15 ̊C higher than that of one glass. 

An Inverse Method for Parameter Retrieval in Solar Thermal Collector With a Single Glass Cover

2021 ◽  
Author(s):  
Ranjan Das
Keyword(s):  
Solar Energy ◽  
Cost Function ◽  
Solar Collector ◽  
Cost Effective ◽  
Solar Thermal ◽  
Ambient Conditions ◽  
Unknown Parameters ◽  
Solution Approach ◽  
Glass Cover ◽  
Design Variables

Abstract The present article highlights the implementation of differential evolution (DE)-assisted metaheuristic optimizer to provide the solution of an inverse multi-variable problem related to a flat absorber solar collector consisting of a single glass. For satisfying a given heating requirement from the solar collector, the necessary tilt angle and the thickness of the glass cover are simultaneously predicted using the proposed DE methodology. The existing study of inverse multi-variable optimization analysis has been done for dynamic values of solar energy radiation and different ambient conditions commonly encountered in various geographical locations of India. Formulation of the current research involves the minimization of a newly proposed cost function involving the required and the acquired heat transfer rates from the solar collector in Euclidean space. The solution approach then utilizes a dynamic exchange between evolutionary metaheuristic DE and a well-validated forward solver containing analytical expressions of heat energy balance within the solar collector. Variations of cost function and the estimated design variables are mainly studied to visualize the algorithm’s behavior for a single gazing-based solar thermal device. Multiple possible groupings of the unknown parameters of the solar collector are revealed, which always collectively result in a desired heating requirement from the solar collector. Sensitivity indices related to the design variables are evaluated for ascertaining the relative importance of parameter selection. Encouraging opportunity is found towards the system’s size reduction through sparing selection of inclination angle. The current study provides a convenient and cost-effective tool to select the necessary inclination and glass covers to obtain low to medium heating requirements from the available incident solar energy.

scholarly journals Determination of the amount of solar energy perceived by a spherical tubular collector

2021 ◽  
Vol 2021 (2) ◽  
pp. 53-55
Author(s):  
Yu.M. Matsevytyi ◽  
◽  
M.O Safonov ◽  
Y.M. Bushtets ◽  
◽  
...  
Keyword(s):  
Solar Energy ◽  
Surface Area ◽  
Solar Collector ◽  
Radiant Energy ◽  
The Sun ◽  
Know How

Spherical solar tubular collector (SSTK) was invented in A. Pidgorny IPMash. as an alternative to the solar flat collector to convert the radiant energy of the Sun into heat. To understand the efficiency of a collector, it is important to know how much energy it can take. A methodology for calculating the amount of heat perceived by the collector has been developed. The surface area of a spherical tubular collector illuminated by the Sun using proposed methodology was determined. The amount of heat received by the solar collector for each day of the year was estimated. The total amount of heat received by SSTK in Kharkiv during the year was defined. Keywords: solar energy, spherical solar tubular collector, amount of heat

scholarly journals Theoretical and Experimental Investigations of Cylindrical Air-Heating Solar Collector

2016 ◽  
Vol 53 (3) ◽  
pp. 11-21
Author(s):  
I. Pelece ◽  
P. Shipkovs
Keyword(s):  
Solar Energy ◽  
Solar Collector ◽  
Experimental Investigations ◽  
The Sun ◽  
Length Of Day ◽  
Solar Collectors ◽  
New Methods ◽  
Air Heating ◽  
Low Latitudes ◽  
Daily Energy

Abstract Solar energy is used not only at low latitudes, where it is available at large amounts, but also at higher latitudes, where height of sun and irradiance are significantly lower. On the other hand, the length of day at higher latitudes is longer in summer than at low latitudes, and also the path of the sun is longer. The present research deals with seeking for new shapes of solar collectors capable of receiving more solar energy. For designing and evaluating new shapes of solar collectors, it is necessary to have new methods for simple calculations of energy received from the sun by surface of any shape and direction. Such a method is explained in the present paper. Based on calculations by the proposed method, a new form of solar collector – a cylindrical collector – has been worked out. This collector is intended for air heating, but main principles can also be used for water heating, and even for photovoltaics. A cylindrical collector receives more energy in the morning and evening than a flat one, but at midday power of both collectors is equal, if effective areas are equal. Daily energy sum of the cylindrical solar collector is 1.5 times greater than that of the flat one.

Technological and Energy Optimization of the Height of Fins Placed on Flat Absorber for Solar Collector

2020 ◽  
Vol 36 ◽  
pp. 1-12
Author(s):  
Coffi Wilfrid Adihou ◽  
Malahimi Anjorin ◽  
Comlan Aristide Houngan ◽  
Christophe Awanto ◽  
Adjibadé Emile Sanya
Keyword(s):  
Solar Energy ◽  
Solar Collector ◽  
Energy Optimization ◽  
Black Body ◽  
Significant Loss ◽  
Necessary Condition ◽  
The Sun ◽  
Absorbed Energy ◽  
The Relationship

This study proposes the use of solar energy by thermal way, to heat water using a flat solar collector whose absorber is equipped with straight fins. The study concerns the optimization of the height of the fins and is based on the criterion of the absorbed energy with the necessary condition, the realization of the black body at the absorber. For this work, the relationship between the fins height, the fins pitch, the coordinates of the sun and the ones of the collector was established in order to determine, for each period of the day, the number of reflections. The absorbed energy during each of the two unfavorable days and for each given fin height was evaluated. The results show that the optimal height is equal to 5 mm all the days of the year considered. A height less than 5 mm will generate a very significant loss while a height superior to 5 mm generates an insignificant gain

scholarly journals A Theoretical Optimum Tilt Angle Model for Solar Collectors from Keplerian Orbit

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4454
Author(s):  
Tong Liu ◽  
Li Liu ◽  
Yufang He ◽  
Mengfei Sun ◽  
Jian Liu ◽  
...  
Keyword(s):  
Data Analysis ◽  
Solar Energy ◽  
Tilt Angle ◽  
Solar Collector ◽  
A Priori ◽  
Local Area ◽  
The Sun ◽  
Solar Collectors ◽  
Solar Altitude ◽  
Complete Set

Solar energy has been extensively used in industry and everyday life. A more suitable solar collector orientation can increase its utilization. Many studies have explored the best orientation of the solar collector installation from the perspective of data analysis and local-area cases. Investigating the optimal tilt angle of a collector from the perspective of data analysis, or guiding the angle of solar collector installation, requires an a priori theoretical tilt angle as a support. However, none of the current theoretical studies have taken the real motion of the Sun into account. Furthermore, a complete set of theoretical optimal tilt angles for solar energy is necessary for worldwide locations. Therefore, from the view of astronomical mechanics, considering the true orbit of the Sun, a mathematical model that is universal across the globe is proposed: the Kepler motion model is constructed from the solar orbit and transformed into the local Earth coordinate system. After that, the calculation of the optimal tilt angle solution is given. Finally, several examples are shown to demonstrate the variation of the optimal solar angle with month and latitude. The results show that for daily fixed solar collectors, the altitude angle of the collector should be about 6° above the noon solar altitude angle in summer and 6° lower in winter. For annual fixed collectors, the tilt angle should be slightly higher than the latitude. In summary, this study demonstrates that when a location is specified, this model can be used to calculate the theoretical optimum tilt angle of solar collectors for that position.

scholarly journals PENGARUH JUMLAH PIPA TERHADAP LAJU PELEPASAN KALOR PADA KOLEKTOR SURYA ABSORBER BATU GRANIT

2015 ◽  
Vol 5 (2) ◽  
Author(s):  
Made Wirawan ◽  
Mirmanto Mirmanto ◽  
Rudy Sutanto
Keyword(s):  
Renewable Energy ◽  
Solar Energy ◽  
Ambient Temperature ◽  
Alternative Energy ◽  
The Other ◽  
The Sun ◽  
Solar Collectors ◽  
Glass Cover ◽  
The North ◽  
Alternative Energies

Fossil energies as un-renewable energies have been getting depletion. Therefore, the use of alternative energy should be raised. One of the alternative energies is solar energy. Solar energy does not pollute the environment and is categorized as a renewable energy which is free and plentiful.   In this research, the solar energy was used to heat water by operating granite absorber solar collectors. The water was flowed naturally from a higher tank and adjusted using a valve fitted at the outlet of the collector.  The volumetric rates of the water were 200, 250 and 300 cc/minutes. Two identical solar collectors with an overall dimension of 0,8 m x 1 m x 0,1 m were placed under the sun and faced to the North with an inclination angle of 15°. One collector contained 5 parallel pipes and the other comprised 7 parallel pipes.  Data obtained in this research are glass cover temperatures, an ambient temperature, absorber temperatures, inlet and outlet water temperatures, and water volumetric rates. The results show that the 7 parallel pipe collector products higher outlet water temperature and energy than the 5 parallel pipe collector. Consequently, in the process of energy removal/discharge, the heat stored in the 7 parallel pipe collector runs out quicker.   

A Non-Conjugated Photothermal Polymer Complex Absorbing Light in Visible and Infrared Windows

2021 ◽  
Author(s):  
Ruiting Li ◽  
Zhen Wang ◽  
Xinglei Tao ◽  
Shanzhi Lyu ◽  
Jichen Jia ◽  
...  
Keyword(s):  
Solar Energy ◽  
Fossil Fuel ◽  
Polymer Complex ◽  
Photothermal Conversion

Solar energy is a renewable and natural alternative to fossil fuel. In order to efficiently use solar energy, photothermal conversion techniques and materials have been intensively investigated, which are raising...

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