Thermal Absorption on Solar Energy Collection in Solid Structure

2010 ◽  
Author(s):  
Yong Huang ◽  
Qing Gao ◽  
Yan Liu ◽  
Y. Y. Yan
Keyword(s):  
Renewable Energy ◽  
Solar Radiation ◽  
Solar Energy ◽  
Growth Potential ◽  
Growth Ratio ◽  
Composite Cement ◽  
Solid Structure ◽  
Highway Network ◽  
Cement And Concrete ◽  
Thermal Absorption

The application of seasonal solar energy usually needs a convenient thermal collection system attached to the engineering. The study of solar energy collection in solid structure was to explore available methods and assess to the possibility of renewable energy generation being exploited within the highway network. The solid structure, like road, building wall and envelop as solar collector has been being considered to be an effective way using renewable energy. This paper focused on the characteristics of temperature in four structures, such as asphalt, red brick, composite cement and concrete road slab under the solar radiation. Furthermore, the collecting heat based on a hydronic system was investigated experimentally. As to four structure slabs, their temperature differences of absorbing solar radiation varies greatly. The asphalt slab gets the highest temperature and the weakest reflection among them. Comparing others, the asphalt slab is higher by 8.1%, 14.9% and 16.4% respectively than brick, composite cement and concrete. The reflection intensity growth ratio was defined and it can denote the growth potential for absorbing radiation from the solid slab surface. From experiments, it is clear that a suitable selection of road materials can produce a great effect to improve thermal absorption, conduction and penetration in the solid slab.

scholarly journals Analysis of Heat Absorption and Collection Based on Solid Structures Collector

2021 ◽  
Author(s):  
Yan Liu ◽  
Wenbin Liu ◽  
Qing Gao ◽  
Yong Huang ◽  
Peizhuo Li ◽  
...  
Keyword(s):  
Growth Potential ◽  
Radiation Absorption ◽  
Growth Ratio ◽  
Composite Cement ◽  
The Road ◽  
Heat Efficiency ◽  
Building Wall ◽  
Road Materials ◽  
Cement And Concrete ◽  
Summer Time

A solid structure, such as a road, building wall or envelop, used as a solar collector is considered an effective and new way to use renewable energy. This paper focused on the temperature characteristics of four structures exposed to sunshine: asphalt, red brick, composite cement and concrete road slab. Furthermore, the collected heat based on a hydraulic system was investigated experimentally. For the four structure slabs, their temperature differences are due to solar radiation absorption varied greatly by the material’s heat absorptance and color. Through the test, asphalt slab attained the highest temperature and had the weakest reflection among the structures. Compared with the others, the temperature of the asphalt slab was greater by 8.1%, 14.9% and 16.4% than the brick, composite cement and concrete, respectively. The reflection intensity growth ratio was defined and indicates the growth potential for absorbing radiation in the solid slab surface. From the experiments, it was concluded that a suitable selection of road materials can greatly improve the thermal absorption, conduction and penetration into the solid slab. The collected heat capability was approximately 250 W/m2 to 350 W/m2 in the natural summer condition. A black coating or a surface modification can collect more heat, reaching greater than 250 W/m2. The solar collecting heat efficiency with a surface configuration of the road slab can reach above 30% in the summer time.

scholarly journals A Review of Solar Radiation Models—Part I

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
A. K. Katiyar ◽  
C. K. Pandey
Keyword(s):  
Renewable Energy ◽  
Solar Radiation ◽  
Solar Energy ◽  
Energy Demand ◽  
Socioeconomic Development ◽  
Global Solar Radiation ◽  
Point Of View ◽  
Climate Conditions ◽  
Energy Devices ◽  
The World

Energy is considered as a key source for the future and plays a pivotal role in its socioeconomic development by raising the standard of living and the quality of life, not only for India but also for the world. In view of the scarce fossil fuel reserves, solar energy is one of the important sources of renewable energy used in India because of the suitable climate conditions. It receives about 5485.17 Wh/m2day of solar insolation with an annual total of about 19, 74, 661.2 Wh/m2. Except for the monsoon months, solar radiation incidence is very encouraging, from the application point of view. For the efficient functioning and better performance of solar energy device, the information of solar radiation and its components at particular location is very essential for designing the solar energy devices. Therefore, over the years, several empirical correlations have been developed in order to estimate the more appropriate solar radiation in India as well as around the world. Here we present a review of different solar radiation models which predict global solar radiation and discussed the long-term plan to meet future energy demand with renewable energy due to economy growth.

scholarly journals The exploitation of western and southern deserts in Iraq for the production of solar energy

2019 ◽  
Vol 9 (6) ◽  
pp. 4617 ◽  
Author(s):  
Ahmed Zkear Abass ◽  
D. A. Pavlyuchenko
Keyword(s):  
Renewable Energy ◽  
Solar Radiation ◽  
Solar Energy ◽  
Fossil Fuels ◽  
Electric Energy ◽  
Energy Resource ◽  
Renewable Energy Resource ◽  
Solar Intensity ◽  
Future Demands ◽  
Basic Features

<span>We have, an overview is presented of the potential future demands and possible supply of solar energy to Iraq. Solar energy, which is clean, unlimited, and environmentally friendly, is presented as a renewable energy resource. Many problems such as CO<sub>2</sub> emissions, industry, human activities, and electricity distribution grids have attracted much attention because of the current state of crude oil production and its prices. Moreover, estimations of solar radiation levels and of the efficiencies of photovoltaics (PVs), concentrated solar power (CSP), and solar chimney towers, have all been investigated. Those systems that combine various sources of energy are called hybrids and they have received much attention in recent decades. The basic features of solar radiation in Iraq are outlined, and the selection of those sites with potential for development of solar plants is based on the local largest solar radiation. Moreover, longitudinal and latitudinal orientation, wind, solar intensity, dust, temperature, rain, humidity, and pollution factors are all considered in the calculation of PV/CSP efficiencies. We know there is an abundance of fossil fuels in Iraq, energy shortages began in 1991 because of the perturbation caused by the full ruin of the country. The obvious renewable energy resource available in Iraq is the solar energy, and its exploitation would provide a means to reduce CO<sub>2</sub> emissions from the burning of fossil fuels and to achieve self-sufficiency of electric energy and export the rest to neighboring countries. Solar energy is becoming increasingly important because of the climatic change in the form of global warming.</span>

scholarly journals Solar Radiation Monitoring

1970 ◽  
Vol 66 (2) ◽  
Author(s):  
Carmen Otilia RUSANESCU ◽  
Ladislau DAVID ◽  
Gigel PARASCHIV ◽  
Gheorghe VOICU ◽  
Mihaela Florentina DAVID ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Solar Radiation ◽  
Solar Energy ◽  
Diffuse Radiation ◽  
Radiation Monitoring ◽  
Meteorological Conditions ◽  
Meteorological Station ◽  
Solar Time ◽  
Main Disadvantage

A direction for current high research is the solar radiation monitoring and renewable energy. Solar energy has a lot of advantages: it is free, is in unlimited quantities, but the main disadvantage is the influence of geographical and meteorological conditions that can not be changed. In this paper is monitored the intensity of solar radiation by the meteorological station and is calculated: diffuse radiation, direct, alien, declination, solar time, latitude, angle azyme.

scholarly journals The establishment and significance of district/regional roof cadastres in the utilization of solar energy

2014 ◽  
Vol 6 (1) ◽  
pp. 45-51
Author(s):  
Lajos Szalontai
Keyword(s):  
Renewable Energy ◽  
Solar Radiation ◽  
Solar Energy ◽  
Renewable Energy Sources ◽  
Local Level ◽  
Regional Level ◽  
Energy Sources

Abstract After its establishment, the roof cadastre - solar cadastre I wish to introduce in this article will form a database, with the help of which we will be able to analyse solar radiation factors on the local level (street, house), and a map display will also be available. Through the implementation of the appropriate methods, we can establish roof/solar cadastres on the settlement/district/regional level and these can help to increase the rate of utilization of renewable energy sources.

A new view on the trend of solar radiation in mainland China - Based on the optimized empirical model

2021 ◽  
Author(s):  
Zihao Feng ◽  
Bin Guo ◽  
Han Xu ◽  
Liguo Zhang ◽  
Jie Xu ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Solar Radiation ◽  
Solar Energy ◽  
Spatial Patterns ◽  
Empirical Model ◽  
Sunshine Duration ◽  
Mainland China ◽  
Development And Utilization ◽  
New Perspective ◽  
Variation Trends

Abstract As a kind of renewable energy, the development and utilization of solar energy is valued by many countries. To accurately provide a basis for the use of solar energy in mainland China, the optimized empirical model is adopted to analyze the variation trends and spatial patterns in solar radiation (SR) during 1961–2016 based on the data of 31 SR sites and 500 sunshine duration (SD) stations. The results indicate that there are obvious discrepancies in the variation trends of annual SR and SD during 1961–2016, with trend conversion occurring in 1992 (SR) and 1980 (SD), respectively. Overall, annual SR decreases at the rate of -3.68 MJ/m²·a in China. Notably, SR declines at the rate of -16.95 MJ/m²·a during 1961–1989 (“dimming” stage), while it increases at the rate of 5.34 MJ/m²·a for 1990–2016 (“brightening” period). In addition, all seasons show a tendency of dimming first and then brightening except for autumn. Compared with SD, SR is more sensitive to changes in pollution, leading to a marked recovery with the reduction of pollution after the 1990s. This study provides a new perspective for the trend difference between SR and SD after the 1990s.

A solar energy resources assessment in Mozambique

2006 ◽  
Vol 17 (4) ◽  
pp. 76-85 ◽  
Author(s):  
B C Cuamba ◽  
M L Chenene ◽  
G Mahumane ◽  
D Z Quissico ◽  
J Lovseth ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Solar Radiation ◽  
Solar Energy ◽  
Energy Resources ◽  
Direct Solar Radiation ◽  
Small Scale ◽  
Renewable Energy Resources ◽  
Fuel Wood ◽  
Sustainable Rural Development ◽  
Starting Point

Just as with other Southern African Development Community (SADC) countries, Mozambique faces severe, interrelated problems of energy and environment linked, with massive consumption of fuel wood biomass. The conventional power grid provides less than 7% of the energy needs for the country’s 17 million inhabitants, and about 83% of the energy consumed in the country comes from biomass. Renewable energy resources can play an important role in the process of development of the country. From the vast renewable energy resources available in the country, solar energy represents one of those with the highest potential. Thus, the evaluation of the potential of solar energy systems in small-scale applications suitable for villages is a strategically good starting point for promotion of sustainable rural development. One of the major impediments in carrying out such studies is the fact that the exact behaviour of solar energy resources throughout the country has not been well studied. In this paper a general characterisation of the global, diffuse and direct solar radiation fields in Mozambique is presented. The study is based on experimental data measured by the National Institute of Meteorology (INAM) in the period 1970- 2000. For these analyses global, diffuse and direct solar radiation data from three stations along the coast line and three stations in the interior of the country have been used. The six stations were representative of the three main regions of the country, namely south, centre and north. Furthermore, sunshine hours data of one selected station was analysed.

scholarly journals Solar Energy Resources of Nakhchivan

2021 ◽  
Vol 7 (9) ◽  
pp. 69-78
Author(s):  
S. Novruzova
Keyword(s):  
Renewable Energy ◽  
Solar Radiation ◽  
Solar Energy ◽  
Energy Resource ◽  
Horizontal Surface ◽  
Energy Resources ◽  
Total Solar Radiation ◽  
Total Radiation ◽  
The Republic ◽  
Autonomous Republic

The presented article examines the issues of energy security of the Nakhchivan Autonomous Republic, which is an integral part of the Republic of Azerbaijan, and the use of renewable energy in its provision. For this purpose, the solar energy resources of the Autonomous Republic were studied. The study used theoretical, computational, observational and comparative analysis methods to estimate solar energy as a renewable energy resource. The main source for assessing the potential of solar energy of the Autonomous Republic — experimental and observation materials of the USSR Hydrometeorological Committee on the Republic of Azerbaijan and NAR for 1960–1980, the results of researches of the Institute of Geography of the Azerbaijan National Academy of Sciences for 1936–1950, Nakhchivan AR experimental-observation materials of the Hydrometeorological Center for 1995–2015, static indicators of Nakhchivan Solar Power Plant for 2016–2017, as well as the results of theoretical and computational research were used. As a result of the study, it was determined that the annual value of total radiation (Q) in the horizontal area was 7541 and 6204 MC/m2, respectively, in the clear and medium cloudy sky. At the same time, the average annual transparency coefficient was 0.8229, 0.811 in winter and 0.897 in summer. The annual value of total radiation (Q) of the horizontal field in the territory of the NAR is higher than in other regions of the country, and the coefficient of transparency of the atmosphere is higher than in other regions, too. At the same time, the duration of solar radiation in the NAR is high and is 2792 hours. Formulas have been proposed to calculate the value of solar radiation falling on a horizontal surface on the basis of many years of experimental and observational materials. Using these calculation formulas, it is possible to calculate the total solar radiation on the horizontal surface for any area of the NAR.

scholarly journals Pengaruh jumlah haluan pipa paralel pada kolektor surya plat datar absorber batu kerikil terhadap laju perpindahan panas

2016 ◽  
Vol 6 (2) ◽  
Author(s):  
M. Wirawan ◽  
R. Kurniawan ◽  
Mirmanto Mirmanto
Keyword(s):  
Renewable Energy ◽  
Solar Radiation ◽  
Solar Energy ◽  
Thermal Energy ◽  
Solar Collector ◽  
Alternative Energy ◽  
Mesh Size ◽  
The Other ◽  
Energy Crisis ◽  
Better Than

Recently the use of energy increases. It leads to the energy crisis. Therefore, it is important to promote alternative energy (renewable energy). One of renewable energies, which is potential in Indonesia, is solar enrgy. Solar energy can be harvested using a solar collector. This device can collect or absorb solar radiation and convert it to thermal energy. In this study, two identical collectors are used. One collector consists of 7 pipes and the other comprises 9 pipes. The overall dimension of the collector is 100 cm x 80 cm x 10 cm and the absorber of the collector is made of gravels with a mesh size of 9.5 -12.5 mm. The collectors are placed with a slope of 15o facing to North. The volumetric rates of water used in the experiments are 300 cc / min, 350 cc / min and 400 cc / min. The results show that the collector with 9 pipes is better than that with 7 pipes.

scholarly journals Assessment of the climatic resource potential of solar radiation as a renewable energy source.

2021 ◽  
Author(s):  
Valentina Zadvornykh ◽  
Trofimova Oksana
Keyword(s):  
Climate Change ◽  
Renewable Energy ◽  
Solar Radiation ◽  
Solar Energy ◽  
Energy Supply ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Total Solar Radiation ◽  
The Russian Federation ◽  
Decentralized Energy

&lt;p&gt;Due to climate change and the need to reduce greenhouse gas emissions, the trend in the development of global energy is aimed at increasing the share of the introduction of environmentally friendly renewable energy sources. This contributes to ensuring sustainable heat and energy supply to the population and production in the zones of decentralized energy supply, which increases the energy security of the regions and the country as a whole. In addition, the introduction of renewable energy sources is seen as a key tool in adapting to climate change.&lt;/p&gt;&lt;p&gt;The report examines the climatic conditions of the territory of the Russian Federation in order to assess the prospects for the practical use of solar energy.&lt;/p&gt;&lt;p&gt;The basis of solar energy resources in a given point or region is the duration of the solar radiation and the amount of direct and total solar radiation entering the horizontal surface.&lt;/p&gt;&lt;p&gt;The research uses data from observations of the actinometric network of the Russian Federation. In areas where there are no observations of solar radiation, either indirect methods of calculation or access to open and accessible databases were used.&lt;/p&gt;&lt;p&gt;Based on the analysis of the complex of climatic characteristics selected for zoning, 10 radiation-homogeneous regions were identified on the territory of Russia, which were ranked according to the priority of the solar potential. The reliability of the boundaries of the selected regions was confirmed by comparing the spatial and temporal variability of the main radiation indicators. The selected regions can be divided into five groups: the most promising, promising, less promising, unpromising and unpromising.&lt;/p&gt;&lt;p&gt;The most promising regions are the regions south of 50N. The first region occupies the Primorsky Krai, the southern part of the Khabarovsk Region and the Amur Region, and the south-east of Transbaikalia. The second region is the southern part of the European territory of Russia.&lt;/p&gt;&lt;p&gt;The amount of total solar radiation entering the earth's surface for a year in these regions is 1330-1390 kWh/m&lt;sup&gt;2&lt;/sup&gt;, which is the maximum for the territory of Russia. Both regions are characterized by a long duration of sunshine, especially for the first region (about 2400 hours per year). The high solar potential of these regions is indicated by the fact that in the period from April to September, the probability of a day favorable for the use of solar energy is 60%, in July it reaches 90%.&lt;/p&gt;&lt;p&gt;In less promising regions of Eastern Siberia, where there is a large influx of solar radiation in the winter and spring periods, it is advisable to use photovoltaic modules to generate electricity for autonomous consumers in areas of decentralized energy supply.&lt;/p&gt;

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