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.

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.

SPECIAL ARTICLE

PEDIATRICS ◽  
1955 ◽  
Vol 15 (5) ◽  
pp. 603-604
Author(s):  
Hugh McCulloch
Keyword(s):  
Lake Michigan ◽  
The South ◽  
The Road ◽  
World's Columbian Exposition ◽  
Columbian Exposition ◽  
South Shore ◽  
Summer Time ◽  
Day Nursery ◽  
The University ◽  
Santa Maria

La Rabida Sanitarium is situated on the shore of Lake Michigan in the South Shore district not far from the University of Chicago with which La Rabida has a close affiliation, its research program being directed from the Department of Pediatrics and Bobs Roberts Memorial Hospital for Children. La Rabida derives its name from the convent Santa Maria de Rabida near Palos de Moguer, Andalusia, in Spain where Columbus visited when he was seeking funds to support his proposed trip "around" the world. He was interviewed by the prior, Juan Perez de Marchena, who also was interested in this new conception. Later a friend of the prior, Garcia Fernandez, a physician and a resident in Palos became interested in the discussion. He agreed that Queen Isabella, who at that time was residing in nearby Granada, should be approached and the matter presented. The outcome of this focal combination of persons is history. A replica of this convent was built in 1893 for the World's Columbian Exposition located in Jackson Park by the Spanish government to house its important exhibit. After the close of the exposition the Spanish consul encouraged a group of women interested in child welfare on the south side of Chicago to use the building for a summer time day nursery for sick infants and mothers living in the hot crowded west side and stock yards districts. After many difficulties, the venture succeeded and has been continued. Visitors to the present hospital as late as 1952 could see in the harbor across the road the full size replica of the "Santa Maria," one of the 3 ships, made for the Columbian Exposition and navigated across the Atlantic Ocean from Spain. The decaying wooden structure has now been removed.

THE ROLE OF PHYSICAL AND GEOMETRICAL FACTORS IN THE GROWTH OF LIVING ORGANISMS

2010 ◽  
Vol 05 (01) ◽  
pp. 43-58 ◽  
Author(s):  
YURI K. SHESTOPALOFF
Keyword(s):  
Experimental Data ◽  
Growth Potential ◽  
Physical Growth ◽  
Physical Work ◽  
Growth Equation ◽  
Mathematical Basis ◽  
Growth Ratio ◽  
Geometrical Form ◽  
Geometrical Factors ◽  
The Impact

The relationship between the organism's growth and its geometrical form was suggested by many ancient and modern thinkers. Many other factors influence growth and replication. All these numerous factors, such as biochemical, physical, work in cooperation. In this paper, we consider the impact of geometrical and physical characteristics of organisms, such as surface, volume and geometrical form, on organisms' growth and replication. The mathematical basis of our study is the growth equation, which describes growth from the physical perspective. First, we model the growth of cells by different shapes, and compare theoretical results to experimental data. We discover that the growth dependencies produced by the growth equation fit experimental data very accurately if we take into account two considerations. First, the cell, or a multicellular growing object, can switch into a replication phase before its physical growth potential is exhausted. Second, the inflow of substance through a unit of the membrane's surface increases during growth, because the cell's growing volume allows it to process more nutrients. Then, we consider overgrowth from the physical perspective, introduce the notion of a growth ratio as an important geometrical characteristic of the growth and overgrowth processes, and generalize our findings.

scholarly journals PHOTOGRAMMETRIC TECHNIQUES FOR ROAD SURFACE ANALYSIS

2016 ◽  
Vol XLI-B5 ◽  
pp. 515-520 ◽  
Author(s):  
V. A. Knyaz ◽  
A. G. Chibunichev
Keyword(s):  
Surface Analysis ◽  
Surface Reconstruction ◽  
Measuring Method ◽  
Parameters Estimation ◽  
Road Surface ◽  
The Road ◽  
Road Pavement ◽  
Powerful Means ◽  
Aerial Vehicle ◽  
Road Materials

The quality and condition of a road surface is of great importance for convenience and safety of driving. So the investigations of the behaviour of road materials in laboratory conditions and monitoring of existing roads are widely fulfilled for controlling a geometric parameters and detecting defects in the road surface. Photogrammetry as accurate non-contact measuring method provides powerful means for solving different tasks in road surface reconstruction and analysis. The range of dimensions concerned in road surface analysis can have great variation from tenths of millimetre to hundreds meters and more. So a set of techniques is needed to meet all requirements of road parameters estimation. Two photogrammetric techniques for road surface analysis are presented: for accurate measuring of road pavement and for road surface reconstruction based on imagery obtained from unmanned aerial vehicle. The first technique uses photogrammetric system based on structured light for fast and accurate surface 3D reconstruction and it allows analysing the characteristics of road texture and monitoring the pavement behaviour. The second technique provides dense 3D model road suitable for road macro parameters estimation.

scholarly journals Difference in Funding Decision Based on the Growth Potential of the Company in Indonesia

2020 ◽  
Vol 9 (4) ◽  
Author(s):  
Darmawan Darmawan
Keyword(s):  
Common Factor ◽  
High Growth ◽  
Growth Potential ◽  
Investment Opportunity ◽  
Funding Decision ◽  
Growth Ratio ◽  
Investment Opportunity Set ◽  
The Difference ◽  
Difference Test ◽  
High Growth Potential

The purpose of the study, The research objective was to To find out the differences in funding decisions between companies that have high growth potential and companies that have low growth potential. Research is a quantitative study. Mean difference test is preceded by Common Factor Analysis to analyze which factors in the Investment Opportunity Set can represent the growth ratio of the company so that it can be used to separate companies with high and low growth potential. Furthermore, the analysis is carried out with a regression model to determine the difference in funding decisions on the growth potential of different companies. The results showed that The consumer goods industry and mining sector sectors that have not proven to be significant are the differences in funding decisions between companies that have the potential to grow high and those with low growth potential. In other sectors, it is evident that there are significant differences in funding decisions between companies that have the potential to grow high and those with low growth potential.

scholarly journals Environmental assessment of road construction materials and technologies with the use of production wastes

2021 ◽  
Vol 265 ◽  
pp. 04007
Author(s):  
N. G. Mitrofanov ◽  
A. Yu. Sushilova
Keyword(s):  
Building Materials ◽  
Construction Materials ◽  
Road Construction ◽  
Environmental Safety ◽  
Quantitative Chemical Analysis ◽  
Waste Products ◽  
The Road ◽  
Standard Procedures ◽  
Road Materials

The following paper presents some results of long-term research on the urgent problem of recycling waste products and their use in road construction. The studied new materials and technologies are justified by the developments of Tyumen Industrial University. The aim of this work is to prove the technique, checking the ecological safety of the road materials with the use of waste products. Research techniques and test subjects are quantitative chemical analysis and biological testing of road material samples with waste additives obtained during drilling and oil production. Along with the standard procedures for analyzing the contamination and toxicity of water extracts, the authors have proposed and tested the evaluation of repeated and long-term extractions, imitating the possible environmental impact of waste products. The obtained results showed the environmental safety of the road-building materials based on wastes.

Extensions of the Monteregian Petrographical Province to the West and North-West

1923 ◽  
Vol 60 (10) ◽  
pp. 433-453 ◽  
Author(s):  
J. Stansfield
Keyword(s):  
Geological Survey ◽  
The West ◽  
North West ◽  
The Road ◽  
Road Materials

The occurrences herein described have been brought to light as a result of the work of the Road Materials Division of the Geological Survey of Canada. Those at Ste. Monique and at Husereau's Farm, near Oka, were discovered by Mr. H. Gauthier in 1916 (1), and those at Isle Cadieux, Como and Cascades Point were discovered by Mr. R. H. Picher in the same year (2). It is owing to the kindness and courtesy of Mr. William McInnes, at that time directing geologist of the Geological Survey of Canada, and of Dr. L. Reinecke, at that time chief of the Road Materials Division of the Geological Survey of Canada, that the writer has been given the opportunity of studying these rocks.

scholarly journals Winter and summer time size distributions and densities of traffic-related aerosol particles at a busy highway in Helsinki

2006 ◽  
Vol 6 (1) ◽  
pp. 549-578 ◽  
Author(s):  
A. Virtanen ◽  
T. Rönkkö ◽  
J. Kannosto ◽  
J. M. Mäkelä ◽  
J. Keskinen ◽  
...  
Keyword(s):  
Particle Distribution ◽  
Total Concentration ◽  
Average Density ◽  
Size Distributions ◽  
Nucleation Mode ◽  
The Road ◽  
Mode 2 ◽  
Traffic Rate ◽  
Winter Time ◽  
Summer Time

Abstract. The number concentration and size distribution of traffic related particles were measured at road-side in Helsinki. Two winter campaigns took place in 10–26 February 2003 and 28 January–12 February 2004 and two summer campaigns in 12–27 August 2003 and 6–20 August 2004. The measurements were performed simultaneously at distances of 9 m and 65 m from the highway. This study concentrates on data that were measured when the wind direction was from the road to the measurement site. The total concentration in winter time was 2–3 times higher than in summer time and it was dominated by nucleation mode particles. The particles smaller than 63 nm (at aerodynamic size) constitute ~90% of all particles in winter time and ~80% of particles in summer time. The particle total concentration increases with increasing traffic rate. The dependence of particles smaller than 63 nm on traffic rate is stronger than for particles larger than 63 nm both during summer and winter. The particle distribution at the roadside consists of two distinguishable modes. The GMD of nucleation mode (Mode 1) was 20.3 nm at summer and 18.9 nm at winter. The GMD of the larger mode (Mode 2) was 72.0 nm at summer and 75.1 nm at winter. The GMD values of the modes do not depend on traffic rate. The average density value for Mode 1 particles was 1.0 g/cm3 both in summer and winter time, while the average density value for Mode 2 was 1.5±0.1 g/cm3 and 1.8±0.3 g/cm3 for summer and winter time, respectively.

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