Determination of optimum location and tilt angle of solar collector on the roof of buildings with regard to shadow of adjacent neighbors

2015 ◽  
Vol 14 ◽  
pp. 215-222 ◽  
Author(s):  
Hamid Moghadam ◽  
Saeed Moghadam Deymeh
Keyword(s):  
Tilt Angle ◽  
Solar Collector ◽  
Optimum Location

scholarly journals Determination of Solar Collector Optimum Tilt Angle for Ankara and Districts

2016 ◽  
Vol 21 (1) ◽  
pp. 63
Author(s):  
Abdülkadir KOÇER ◽  
Seyfi Şevik ◽  
Afşin GÜNGÖR
Keyword(s):  
Tilt Angle ◽  
Solar Collector

Design, Development and Performance Test of Two-Axis Solar Tracker System

2014 ◽  
Vol 704 ◽  
pp. 350-354
Author(s):  
Muhammad Ikram Mohd Rashid ◽  
Nik Fadhil bin Nik Mohammed ◽  
Suliana binti Ab Ghani ◽  
Noor Asiah Mohamad
Keyword(s):  
Tilt Angle ◽  
Solar Collector ◽  
Performance Test ◽  
Tracking System ◽  
Electrical Power ◽  
Solar Thermal ◽  
The Sun ◽  
Solar Pv ◽  
Design Development ◽  
Solar Tracking

The energy extracted from photovoltaic (PV) or solar thermal depends on solar insolation. For the extraction of maximum energy from the sun, the plane of the solar collector should always be normal to the incident radiation. Sun trackers move the solar collector to follow the sun trajectories and keep the orientation of the solar collector at an optimal tilt angle. Energy efficiency of solar PV or solar thermal can be substantially improved using solar tracking system. In this paper, an automatic solar tracking system has been designed and developed using DC motor on a mechanical structure with gear arrangement. The movements of two-axis solar trackers for the elevation and azimuth angles are programmed according to the mathematical calculation by using the Borland C++ Builder. Performance of the proposed system over the important parameter like solar radiation received on the collector, maximum hourly electrical power has been evaluated and compared with those for fixed tilt angle solar collector.

scholarly journals Experimental determination of the efficiency of the solar collector integrated into the light transparent building facade

2019 ◽  
Vol 14 (2) ◽  
pp. 31-38
Author(s):  
Vasyl Zhelykh ◽  
Peter Kapalo ◽  
Stepan Shapoval ◽  
Iryna Venhryn ◽  
Khrystyna Kozak
Keyword(s):  
Renewable Energy ◽  
Solar Collector ◽  
Heat Supply ◽  
Energy Systems ◽  
Heat Supply System ◽  
Optimal Operation ◽  
Supply System ◽  
Energy Sources ◽  
Further Development

AbstractOne of the most promising energy sources is solar energy, which is confirmed by the growth in the development of renewable energy for European countries. The main goal of research is to design and implement the latest energy systems for passive buildings using renewable energy. In this paper is documented the optimal operation stages of the solar heat supply system were investigated with recommendations for further development of the design and construction of passive buildings in Ukraine South.

scholarly journals Automatic validation of the gantry tilt in a computed tomography scanner using a head polymethyl methacrylate phantom

2021 ◽  
Vol 27 (1) ◽  
pp. 57-62
Author(s):  
Rakhma Noviliawati ◽  
Choirul Anam ◽  
Heri Sutanto ◽  
Geoff Dougherty ◽  
Muhammad Ridha Mak’ruf
Keyword(s):  
Computed Tomography ◽  
Polymethyl Methacrylate ◽  
Tilt Angle ◽  
Automatic Method ◽  
Phantom Measurement ◽  
Manual Method ◽  
Method R ◽  
Computed Tomography Scanner ◽  
Automatic Validation

Abstract The purpose of this study was to develop an automatic method for validating the computed tomography gantry tilt. A head polymethyl methacrylate phantom with a diameter of 16 cm was used. Gantry tilt angles were measured both manually and automatically. Manual measurements were performed by measuring the length of the anteroposterior and lateral diameters from acquired images using electronic calipers. Automatic measurements consisted of a number of steps: phantom segmentation, determination of the center of the phantom, measurement of the anteroposterior and lateral diameters, and computation of the gantry tilt angle. The method was implemented on the gantry angles from 0° to 15°. The proposed method of measuring gantry angles produced accurate gantry tilt angles. The differences with the angles displayed on the gantry were less than 1°. The results of the automatic method were the same as those of the manual method (R2 > 0.98).

Determination of Attack Angle and Tilt Angle of a Cutting Pick

2013 ◽  
Vol 705 ◽  
pp. 415-418 ◽  
Author(s):  
Yong Sun ◽  
Xing Sheng Li
Keyword(s):  
Tilt Angle ◽  
Attack Angle ◽  
Optimal Values ◽  
Skew Angles ◽  
The Relationship

Mechanical excavators play an important role in mining and construction. An excavation machine cuts rocks using its cutterhead which is normally composed of a large number of cutting picks. These picks are installed on a drum with certain attack angles, tilt angles and skew angles. These angles, especially attack and tilt angles, will affect the forces acting on individual picks and the cutterhead. To ensure the reliability and productivity of the excavation machine, these angles have to be kept in their optimal values. However, in manufacturing, these three types of angles cannot be set simultaneously. They have to be respectively set one after another. As a result, the angle which is set previously will be changed by the angles which are determined after it. Understanding the relationship between the values of the final angle and the designed angle is important for optimizing drum and pick design. This paper develops a formula for quantitatively analyzing this relationship, with the research scope limited to attack angle and tilt angle only as the first stage of the study.

Numerical Investigation of the Effects of Environmental Parameters and Geometry on Energy Absorption for an Open-type Water-cooled Flat-plate Solar Collector

2000 ◽  
Vol 122 (2) ◽  
pp. 56-62 ◽  
Author(s):  
B. Song ◽  
H. Inaba ◽  
A. Horibe
Keyword(s):  
Heat Flux ◽  
Flat Plate ◽  
Energy Absorption ◽  
Tilt Angle ◽  
Solar Collector ◽  
Water Film ◽  
Operating Conditions ◽  
Open Type ◽  
Type Water ◽  
Flat Plate Solar Collector

A two-dimensional mathematical model was developed for predicting the performance of an open-type water-cooled flat-plate solar collector, and solved numerically through an implicit finite difference method. The effects of various environmental and geometric conditions on energy absorption for the collector were investigated. The results predict that there is an optimum length and tilt angle for the absorbing plate for which the collector could obtain the highest solar energy absorptance. The latent heat flux of water evaporation can be 3 to 15 times larger than the sensible heat flux under normal operating conditions. The wind speed and the inlet water temperature have a large influence on the energy absorption of the collector. The effects of the solar incident flux, the atmospheric humidity and temperature, the absorbing plate tilt angle and length, and the water film thickness on the temperature rise of the water film and/or the absorptance of the collector are clarified. The open-type flat-plate collector is suitable to operate at lower inlet water temperatures and in regions where the local latitude is in the range of 20°N-40°N, and the weather is humid and hot with low winds. [S0199-6231(00)00202-1]

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