Numerical simulation of coastal clouds when solar radiation is blocked by smoke

1989 ◽  
Vol 24 (1-4) ◽  
pp. 221-245
Author(s):  
Charles R. Molenkamp
Keyword(s):  
Numerical Simulation ◽  
Solar Radiation

scholarly journals Optimal design of the solar tracking system of parabolic trough concentrating collectors

2020 ◽  
Vol 15 (4) ◽  
pp. 613-619
Author(s):  
Li Kong ◽  
Yunpeng Zhang ◽  
Zhijian Lin ◽  
Zhongzhu Qiu ◽  
Chunying Li ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Solar Radiation ◽  
Tracking System ◽  
Low Cost ◽  
Parabolic Trough ◽  
The North ◽  
Tracking Mode ◽  
Solar Tracking ◽  
East West

Abstract The present work aimed to select the optimum solar tracking mode for parabolic trough concentrating collectors using numerical simulation. The current work involved: (1) the calculation of daily solar radiation on the Earth’s surface, (2) the comparison of annual direct solar radiation received under different tracking modes and (3) the determination of optimum tilt angle for the north-south tilt tracking mode. It was found that the order of solar radiation received in Shanghai under the available tracking modes was: dual-axis tracking > north-south Earth’s axis tracking > north-south tilt tracking (β = 15°) > north-south tilt tracking (β = 45) > north-south horizontal tracking > east-west horizontal tracking. Single-axis solar tracking modes feature simple structures and low cost. This study also found that the solar radiation received under the north-south tilt tracking mode was higher than that of the north-south Earth’s axis tracking mode in 7 out of 12 months. Therefore, the north-south tilt tracking mode was studied separately to determine the corresponding optimum tilt angles in Haikou, Lhasa, Shanghai, Beijing and Hohhot, respectively, which were shown as follows: 18.81°, 27.29°, 28.67°, 36.21° and 37.97°.

scholarly journals Trees as a solar control measure for southern-oriented street frontages. Analysis of a selected street model for a humid continental climate

2021 ◽  
Author(s):  
Katarzyna Zielonko-Jung ◽  
Justyna Janiak
Keyword(s):  
Numerical Simulation ◽  
Solar Radiation ◽  
Control Measure ◽  
Total Solar Radiation ◽  
Single Row ◽  
Ground Floor ◽  
Radical Reduction ◽  
Solar Control ◽  
Sycamore Maple ◽  
Continental Climate

AbstractThe present study is aimed at the analysis of possibilities for shading southern frontage of street oriented along the E-W axis by the single row of trees, parallel to the southern elevations. The effectiveness of solar control shading was tested depending on the geometric relationships between trees and buildings. Numerical simulation analyses were conducted in Rhinoceros® program for the street located in humid continental climate in city Płock, Poland (52°32′50 “N 19°42’00 “E), for the day of the highest degree of total solar radiation in the year i.e. June 7th, during hours: 8.00a.m - 5.00 p.m. The analysis has proved that a row of 20–25 year old Sycamore Maple ‘Rotterdam’ in the street 30 m wide and 18 m high (H/W = 0.6), can provide solar protection for the southern frontage, especially when trees are located no more than 4 m away. Location of greenery within the range of 4 to 5 m from the buildings leads to a radical reduction in the possibility of shading the wall surfaces (at 5 m to 0%). Over 90% of the shading area of the ground floor façade walls was found when trees were within the distance 2 and 3 m away from the building.

Numerical simulation of surface solar radiation over Southern Africa. Part 1: Evaluation of regional and global climate models

2018 ◽  
Vol 52 (1-2) ◽  
pp. 457-477 ◽  
Author(s):  
Chao Tang ◽  
Béatrice Morel ◽  
Martin Wild ◽  
Benjamin Pohl ◽  
Babatunde Abiodun ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Solar Radiation ◽  
Southern Africa ◽  
Climate Models ◽  
Global Climate ◽  
Global Climate Models ◽  
Surface Solar Radiation

Numerical Simulation on Temperature Field of CFST Member under Solar Radiation

2011 ◽  
Vol 354-355 ◽  
pp. 1241-1244
Author(s):  
Yan He ◽  
Man Ding ◽  
Qian Zhang
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Temperature Distribution ◽  
Solar Radiation ◽  
Cross Section ◽  
Temperature Difference ◽  
Steel Tube ◽  
Concrete Filled Steel Tube ◽  
Nonlinear Temperature ◽  
The Cross

In this paper the temperature field of Concrete Filled Steel Tube (CFST) member under solar radiation is simulated. The results show that temperature distribution caused by solar radiation is nonlinear over the cross-section of CFST member, and it is significantly varied with time and sections, the largest nonlinear temperature difference is over 26.3°C.

Numerical simulation of surface solar radiation over Southern Africa. Part 2: projections of regional and global climate models

2019 ◽  
Vol 53 (3-4) ◽  
pp. 2197-2227 ◽  
Author(s):  
Chao Tang ◽  
Béatrice Morel ◽  
Martin Wild ◽  
Benjamin Pohl ◽  
Babatunde Abiodun ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Solar Radiation ◽  
Southern Africa ◽  
Climate Models ◽  
Global Climate ◽  
Global Climate Models ◽  
Surface Solar Radiation

Characteristics of Jointed Plain Concrete Pavement (JPCP) Built-in Temperature in Different Climate Conditions

2013 ◽  
Vol 723 ◽  
pp. 960-967
Author(s):  
Chang Bin Hu ◽  
Zeng Hua Sun ◽  
Li Juan Wang
Keyword(s):  
Numerical Simulation ◽  
Solar Radiation ◽  
Air Temperature ◽  
Temperature Difference ◽  
Plain Concrete ◽  
Concrete Pavement ◽  
Early Age ◽  
Climate Conditions ◽  
Solar Radiation Intensity ◽  
Basic Temperature

To understand the characteristics of early-age built-in temperature in JPCP, the actual data of construction climate conditions of typical regions in China were investigated. Based on the application of early-age JPCP temperature numerical simulation program, built-in temperature characteristics of early-age pavement in typical regions was analyzed. The results show that the pavement constructed in different climate conditions produce difference characteristics of early-age built-in temperature due to geographical distinction. Positive built-in temperature difference of JPCP is larger in the regions which have difference in temperature between day and night or higher solar radiation intensity, while the negative built-in temperature difference isn’t influenced obviously by different regions and paving conditions. The maximum positive (negative) built-in temperature difference generally appears in pavement constructed in hot summer. The air temperature is the major factor affecting built-in basic temperature. The higher air temperature, results in the higher built-in basic temperature (temperature in slab bottom) is.

Heating of Bee Honey, Olive Oil, Milk and Water in a Solar Cooker Box Type With Internal Reflectors

2007 ◽  
Author(s):  
H. Terres ◽  
J. A. Ortega ◽  
M. Gordon ◽  
J. R. Morales ◽  
A. Lizardi
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Solar Radiation ◽  
Specific Heat ◽  
Olive Oil ◽  
Mexico City ◽  
Field Point ◽  
Environment Temperature ◽  
Processing Information ◽  
Simulation Results

Numerical simulation results are shown to determine the heating in liquids when a solar cooker box type with internal reflector is used to this end. The data evaluated correspond to temperature values from bee honey, olive oil, milk and water when they are heated in the solar cooker. The maximum simulation temperatures reached are 91.8, 91.6, 86.2 and 85.3 °C that correspond to bee honey, olive oil, milk and water respectively. A comparative between simulation and experimental results also are shown. The values presented evidence the influence of the specific heat in each fluid considered. In the numerical simulation were used solar radiation and environment temperature values for February 26, 2006 in Mexico City. The experimental data were acquired using an Eppley piranometer and a Field Point device and were used as initial numerical conditions in the simulation. The processing information acquired was made using the LabView 7.0 software.

scholarly journals Outdoor Thermal Comfort Optimization through Vegetation Parameterization: Species and Tree Layout

2021 ◽  
Vol 13 (21) ◽  
pp. 11791
Author(s):  
Bouthaina Sayad ◽  
Djamel Alkama ◽  
Redha Rebhi ◽  
Younes Menni ◽  
Hijaz Ahmad ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Solar Radiation ◽  
Thermal Comfort ◽  
Atmospheric Model ◽  
Outdoor Thermal Comfort ◽  
Maximum Reduction ◽  
Palm Trees ◽  
Outdoor Spaces ◽  
Ficus Nitida

The optimization of outdoor thermal comfort has become the keystone to guarantee the healthy and comfortable use of outdoor spaces. This study aims to optimize the outdoor thermal comfort through vegetation parameterization in a boulevard located in Guelma city, Algeria during summertime. However, two main parameters were investigated, species and tree layout, through a numerical simulation. We first collected microclimate data of a sunny summer day. Second, we used real microclimate data in different simulations using the Envi-met atmospheric model. The findings reveal that Ficus Nitida is the most significant species to intercept solar radiation and provide shade over the day in Souidani Boudjemaa Boulevard, with a maximum reduction of Ta = 0.3 °C and UTCI = 2.6 °C at 13:00 p.m. Tree layout is a determining parameter in the creation of shaded paths, based on the quality of the shadows cast by the trees, namely, their size. Thereby, planting the washingtonia palm trees along the center of the boulevard is the best option to maximize the shaded area within the boulevard, with maximum reduction of Ta = 1.8 °C and UTCI = 3.5 °C at 16:00 p.m.

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