Energetic Analysis of a Low Cost Solar Heater

2010 ◽  
Author(s):  
Renato Adriane Alves Ruas ◽  
Edney Alves Magalhães ◽  
Adílio Flauzino de Lacerda Filho ◽  
Juarez Souza Silva ◽  
Daniel Rizzo Carvalho
Keyword(s):  
Low Cost ◽  
Energetic Analysis ◽  
Solar Heater

Analysis and performance of a low-cost solar heater

2011 ◽  
Vol 36 (9) ◽  
pp. 2538-2546 ◽  
Author(s):  
D.A. Siqueira ◽  
L.G.M. Vieira ◽  
J.J.R. Damasceno
Keyword(s):  
Low Cost ◽  
And Performance ◽  
Solar Heater

scholarly journals Construção de um aquecedor solar de água sustentável na Amazônia: usando a metodologia PBL para interação entre cursos de engenharia e escola de ensino médio

2015 ◽  
Vol 1 (3) ◽  
pp. 131-139
Author(s):  
Patricia Mota Milhomem ◽  
Marcos Renan dos Santos Fialho ◽  
Wellington Da Silva Fonseca ◽  
Silvana Nascimento da Silva
Keyword(s):  
Applied Sciences ◽  
High School Students ◽  
Technological Development ◽  
Low Cost ◽  
Project Based Learning ◽  
National Council ◽  
Single Family ◽  
School Students ◽  
Solar Heater ◽  
Extension Program

Across the country is being widely spread the use of energy  renewable, one of the clearest examples of this is to obtain energy by the sun's rays, as well as the latest advances in wind turbine deployment in the South and Northeast. Thus, in order to encourage high school students to engage in the study of science and research development intertwined with energy efficiency. The Laboratório de Engenhocas (hereafter, translated: Gadget Lab) extension program of the Federal University of Pará (UFPA/CAMTUC), approved projects CNPq (National Council for Scientific and Technological Development) in order to insert into in state high schools of the municipality the methodology PBL (Project Based Learning) in order teach the students to learn, be proactive and spark interest in the field of applied sciences. Thus, students sought to develop activities that contribute to minimize the problems of society, thus, was the built and implemented a Low Cost Solar Heater in a single family residence Tucuruí where it was possible to analyze its feasibility and efficiency.

scholarly journals EXPERIMENTAL STUDY OF A DOMESTIC SOLAR HEATER WITH IRON ORE AS THE ABSORBER

2020 ◽  
Vol 19 (1) ◽  
pp. 13
Author(s):  
D. L. F. Pottie ◽  
L. H. C. Dias ◽  
R. P. Mendes ◽  
L. V. S. Martins ◽  
R. A. M. Ferreira
Keyword(s):  
Experimental Study ◽  
Return On Investment ◽  
Iron Ore ◽  
Thermal Contact Resistance ◽  
Low Cost ◽  
Thermal Contact ◽  
Average Temperature ◽  
Aluminium Sheets ◽  
Solar Heater ◽  
High Level

In Brazil's households, the use of electricity to heat water prevails, but its replacement by solar collectors can be justified due to the country's high level of solar radiation, average temperature and number of sunny days. A drawback preventing the broad spread of this technology its elevated inicial cost that, in spite of the short return on investment time, hinders its insertions on the population lower classes. Thereby, this study's goal is to search a cheaper alternative to one of the collector's most expensive component, by proposing the replacement of the aluminium sheets, used as absorber, by iron ore. This material was chosen due to its abundance in Minas Gerais, low cost and for being dark colored, ensuring high levels of absortance (0,4 < λ< 0,7 µm). A finely grained hematitic () ore was used to achieve an uniform compaction throughout its area, reducing this way, the thermal contact resistance between the absorber and the copper tubes. The collector was built and tested in similar conditions it would have faced during its lifespan, and the result shows that the maximum thermal efficiency was 58%.

scholarly journals AVALIAÇÃO DO CONFORTO TÉRMICO DE AQUECEDORES SOLARES COMPOSTOS POR EMBALAGENS REAPROVEITÁVEIS UTILIZANDO MODELOS DE REGRESSÃO POLINOMIAL

2016 ◽  
Vol 31 (3) ◽  
pp. 273
Author(s):  
Luís Roberto Almeida Gabriel Filho ◽  
Lucas Siqueira De Souza ◽  
Camila Pires Cremasco ◽  
Bruno César Góes ◽  
Fernando De Lima Caneppele ◽  
...  
Keyword(s):  
Solar Energy ◽  
Thermal Comfort ◽  
Polynomial Regression ◽  
Low Cost ◽  
Cost Benefit ◽  
Comparison Method ◽  
Conventional Heating ◽  
Mathematical Methods ◽  
Polynomial Regression Models ◽  
Solar Heater

O aproveitamento da energia solar é um tema abordado por diversos pesquisadores, sejam com aproveitamento em conversão elétrica desta energia, sejam eles com a utilização de aquecimento solar. Uma vez que esta última forma de conversão vem apresentando interessantes relações custo/benefício, diversas pesquisas foram realizadas visando provar tal fato, e também aprimorar tais aquecedores para ou terem uma maior eficiência, ou menores custos. No Brasil, um modelo de aquecedor solar compostos por embalagens reaproveitáveis, construído e patenteado (sob domínio público) pelo aposentado José Alcino, da cidade de Tubarão-SC, e vencedor do prêmio Super Ecologia 2004 da revista Super Interessante, vem se destacando-se justamente pelo seu baixo custo e facilidade de construção. O objetivo deste trabalho foi realizar uma avaliação do conforto térmico destes aquecedores frente aos convencionais, utilizando modelos de regressão polinomial a partir de um método de comparação com aquecedor convencional instalado em diferentes locais. Para isto, foram realizadas aferições de temperatura do ambiente e da água aquecida pelo aquecedor alternativo, bem como obtido dados de um aquecedor convencional instalado em local diferente ao do primeiro aquecedor. Utilizando-se de métodos matemáticos para a utilização dos resultados térmicos do aquecedor convencional para o local de instalação do aquecedor alternativo, foi possível a realização da comparação térmica. O sistema de alternativo apresentou médias de temperatura com 10°C abaixo da água do sistema de aquecimento convencional.PALAVRAS-CHAVE: energia solar, modelos matemáticos, aquecimento de água. EVALUATION OF THE THERMAL COMFORT OF SOLAR HEATERS COMPOSED BY REAPROVEITABLE PACKS USING POLYNOMIAL REGRESSION MODELSABSTRACT: The use of solar energy is an issue addressed by several researchers, whether they use electric conversion of this energy, whether using solar heating. Since this last form of conversion has presented interesting cost-benefit relationships, several researches have been carried out to prove this fact, and also to improve such heaters for or have a higher efficiency or lower costs. In Brazil, a model of solar heater made up of recyclable packaging, built and patented (under public domain) by the retired José Alcino, from Tubarão-SC, and winner of the 2004 Super Ecology Award of Super Interessante magazine, has been a highlight precisely because of its low cost and ease of construction. The objective of this work was to perform an evaluation of the thermal comfort of these heaters compared to conventional heaters using polynomial regression models from a comparison method with conventional heater installed in different locations. For this, measurements were made of ambient temperature and water heated by the alternative heater, as well as data obtained from a conventional heater installed in a different location than the first heater. Using mathematical methods to use the thermal results of the conventional heater for the location of the alternative heater, it was possible to perform the thermal comparison. The alternative system presented averages of temperature with 10 ° C below the water of the conventional heating system.KEYWORDS: solar energy, mathematical models, water heating.

Exergetic, economic and environmental (3E) analysis of a low cost solar heater in different configurations

2020 ◽  
Vol 160 ◽  
pp. 1096-1104 ◽  
Author(s):  
Eloiny Guimarães Barbosa ◽  
Marcos Eduardo Viana de Araujo ◽  
Roberto Precci Lopes ◽  
Marcio Arêdes Martins ◽  
Maria Joselma de Moraes ◽  
...  
Keyword(s):  
Low Cost ◽  
Solar Heater

Decomposition of the metastable beta titanium alloy Ti-15-3

1983 ◽  
Vol 41 ◽  
pp. 264-265
Author(s):  
Y. L. Chen ◽  
S. Fujlshiro
Keyword(s):  
Low Cost ◽  
High Strength ◽  
Alpha Phase ◽  
Thick Sheet ◽  
Omega Phase ◽  
Beta Titanium Alloy ◽  
Beta Titanium ◽  
Beta Matrix ◽  
Metastable Beta ◽  
Very High

Metastable beta titanium alloys have been known to have numerous advantages such as cold formability, high strength, good fracture resistance, deep hardenability, and cost effectiveness. Very high strength is obtainable by precipitation of the hexagonal alpha phase in a bcc beta matrix in these alloys. Precipitation hardening in the metastable beta alloys may also result from the formation of transition phases such as omega phase. Ti-15-3 (Ti-15V- 3Cr-3Al-3Sn) has been developed recently by TIMET and USAF for low cost sheet metal applications. The purpose of the present study was to examine the aging characteristics in this alloy.The composition of the as-received material is: 14.7 V, 3.14 Cr, 3.05 Al, 2.26 Sn, and 0.145 Fe. The beta transus temperature as determined by optical metallographic method was about 770°C. Specimen coupons were prepared from a mill-annealed 1.2 mm thick sheet, and solution treated at 827°C for 2 hr in argon, then water quenched. Aging was also done in argon at temperatures ranging from 316 to 616°C for various times.

Chromic Acid Etching of Polyethylene

1973 ◽  
Vol 31 ◽  
pp. 72-73
Author(s):  
J. D. Muzzy ◽  
R. D. Hester ◽  
J. L. Hubbard
Keyword(s):  
Chromic Acid ◽  
Low Cost ◽  
Acid Etching ◽  
Crystalline Morphology ◽  
Bulk Specimen ◽  
Morphological Studies ◽  
Perfect Form ◽  
Molecular Length ◽  
Lamellar Texture ◽  
Cost Studies

Polyethylene is one of the most important plastics produced today because of its good physical properties, ease of fabrication and low cost. Studies to improve the properties of polyethylene are leading to an understanding of its crystalline morphology. Polyethylene crystallized by evaporation from dilute solutions consists of thin crystals called lamellae. The polyethylene molecules are parallel to the thickness of the lamellae and are folded since the thickness of the lamellae is much less than the molecular length. This lamellar texture persists in less perfect form in polyethylene crystallized from the melt.Morphological studies of melt crystallized polyethylene have been limited due to the difficulty of isolating the microstructure from the bulk specimen without destroying or deforming it.

Glass Knife Geometry as Seen by the SEM

1971 ◽  
Vol 29 ◽  
pp. 454-455
Author(s):  
J. Temple Black
Keyword(s):  
Low Cost ◽  
Amorphous Material ◽  
Stress Concentrations ◽  
Basic Tool ◽  
Tool Materials ◽  
Optical Inspection ◽  
Surface Flaws ◽  
Slip Planes ◽  
Glass Knife ◽  
Diamond Knife

In ultramicrotomy, the two basic tool materials are glass and diamond. Glass because of its low cost and ease of manufacture of the knife itself is still widely used despite the superiority of diamond knives in many applications. Both kinds of knives produce plastic deformation in the microtomed section due to the nature of the cutting process and microscopic chips in the edge of the knife. Because glass has no well defined slip planes in its structure (it's an amorphous material), it is very strong and essentially never fails in compression. However, surface flaws produce stress concentrations which reduce the strength of glass to 10,000 to 20,000 psi from its theoretical or flaw free values of 1 to 2 million psi. While the microchips in the edge of the glass or diamond knife are generally too small to be observed in the SEM, the second common type of defect can be identified. This is the striations (also termed the check marks or feathers) which are always present over the entire edge of a glass knife regardless of whether or not they are visable under optical inspection. These steps in the cutting edge can be observed in the SEM by proper preparation of carefully broken knives and orientation of the knife, with respect to the scanning beam.

Spectraplot: A PC-based spectrum translation and display program

1988 ◽  
Vol 46 ◽  
pp. 918-919
Author(s):  
H. O. Colijn
Keyword(s):  
Low Cost ◽  
Transfer Program ◽  
File Transfer ◽  
Transfer Data ◽  
Error Checking ◽  
Data Files ◽  
The University

Many labs today wish to transfer data between their EDS systems and their existing PCs and minicomputers. Our lab has implemented SpectraPlot, a low- cost PC-based system to allow offline examination and plotting of spectra. We adopted this system in order to make more efficient use of our microscopes and EDS consoles, to provide hardcopy output for an older EDS system, and to allow students to access their data after leaving the university.As shown in Fig. 1, we have three EDS systems (one of which is located in another building) which can store data on 8 inch RT-11 floppy disks. We transfer data from these systems to a DEC MINC computer using “SneakerNet”, which consists of putting on a pair of sneakers and running down the hall. We then use the Hermit file transfer program to download the data files with error checking from the MINC to the PC.

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