Ecophysiology of two solar tracking desert winter annuals

Oecologia ◽  
1983 ◽  
Vol 58 (1) ◽  
pp. 10-18 ◽  
Author(s):  
I. N. Forseth ◽  
J. R. Ehleringer
Keyword(s):  
Solar Tracking ◽  
Winter Annuals

Ecophysiology of two solar tracking desert winter annuals

Oecologia ◽  
1983 ◽  
Vol 57 (3) ◽  
pp. 344-351 ◽  
Author(s):  
I. N. Forseth ◽  
J. R. Ehleringer
Keyword(s):  
Solar Tracking ◽  
Winter Annuals

Ecophysiology of two solar tracking desert winter annuals

Oecologia ◽  
1982 ◽  
Vol 54 (1) ◽  
pp. 41-49 ◽  
Author(s):  
I. N. Forseth ◽  
J. R. Ehleringer
Keyword(s):  
Solar Tracking ◽  
Winter Annuals

Ecophysiology of Two Solar-Tracking Desert Winter Annuals. I. Photosynthetic Acclimation to Growth Temperature

1982 ◽  
Vol 9 (3) ◽  
pp. 321 ◽  
Author(s):  
IN Forseth ◽  
JR Ehleringer
Keyword(s):  
High Temperatures ◽  
Meteorological Conditions ◽  
Death Valley ◽  
Photosynthetic Acclimation ◽  
Plant Life ◽  
Solar Tracking ◽  
Thermal Death ◽  
Winter Annuals ◽  
Growth Chambers ◽  
Temperature Optima

The ability of two solar-tracking desert winter annuals, Lupinus arizonicus Watson and Malvastrum rotundifolium Gray, to acclimate their photosynthetic characteristics to different growth temperatures was examined. Plants were grown in growth chambers under 25/15°C and 40/30°C thermal regimes. The plants grown at 40/30°C were also subjected to a drying cycle in order to assess whether or not drought affected the photosynthetic acclimation to high temperatures. Both species exhibited shifts in their temperature optima and thermal death points for photosynthesis. The droughted plants showed no further acclimation than did the watered plants grown at 40/30°C. Using representative meteorological conditions measured in Death Valley, California, it was predicted that photosynthetic acclimation plays only a small role in enhancing daily carbon-gaining ability for late-season conditions. However, under conditions of drought stress and high temperatures, the acclimation may prevent thermal death and extend plant life.

Performansi aktual modul photovoltaik dengan pengarah matahari

2018 ◽  
Vol 12 (2) ◽  
pp. 98 ◽  
Author(s):  
Jalaluddin . ◽  
Baharuddin Mire
Keyword(s):  
Solar Radiation ◽  
Local Time ◽  
Performance Characteristic ◽  
Electrical Energy ◽  
Photovoltaic Module ◽  
Experiment Data ◽  
Actual Performance ◽  
Pv Module ◽  
Solar Tracking ◽  
Pv Modules

Actual performance of photovoltaic module with solar tracking is presented. Solar radiation can be converted into electrical energy using photovoltaic (PV) modules. Performance of polycristalline silicon PV modules with and without solar tracking are investigated experimentally. The PV module with dimension 698 x 518 x 25 mm has maximum power and voltage is 45 Watt and 18 Volt respectively. Based on the experiment data, it is concluded that the performance of PV module with solar tracking increases in the morning and afternoon compared with that of fixed PV module. It increases about 18 % in the morning from 10:00 to 12:00 and in the afternoon from 13:30 to 14:00 (local time). This study also shows the daily performance characteristic of the two PV modules. Using PV module with solar tracking provides a better performance than fixed PV module. 

Application of Dual Axis Solar Tracking System in Qurghonteppa, Tajikistan

2019 ◽  
Author(s):  
Adven Masih ◽  
Murodbek Safaraliev ◽  
Karomatullo Mukhmudov ◽  
Ismoil Odinaev ◽  
Bukhtiyor Ghoziev ◽  
...  
Keyword(s):  
Tracking System ◽  
Solar Tracking

scholarly journals New Omnidirectional Sensor Based on Open-Source Software and Hardware for Tracking and Backtracking of Dual-Axis Solar Trackers in Photovoltaic Plants

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 726
Author(s):  
Francisco J. Gómez-Uceda ◽  
José Ramirez-Faz ◽  
Marta Varo-Martinez ◽  
Luis Manuel Fernández-Ahumada
Keyword(s):  
Open Source Software ◽  
Energy Production ◽  
Scientific Community ◽  
Radiative Capture ◽  
Low Cost ◽  
Free Software ◽  
Solar Tracking ◽  
Software And Hardware ◽  
Celestial Sphere ◽  
Photovoltaic Plants

In this work, an omnidirectional sensor that enables identification of the direction of the celestial sphere with maximum solar irradiance is presented. The sensor, based on instantaneous measurements, functions as a position server for dual-axis solar trackers in photovoltaic plants. The proposed device has been developed with free software and hardware, which makes it a pioneering solution because it is open and accessible as well as capable of being improved by the scientific community, thereby contributing to the rapid advancement of technology. In addition, the device includes an algorithm developed ex professo that makes it possible to predetermine the regions of the celestial sphere for which, according to the geometric characteristics of the PV plant, there would be shading between the panels. In this way, solar trackers do not have to locate the Sun’s position at all times according to astronomical models, while taking into account factors such as shadows or cloudiness that also affect levels of incident irradiance on solar collectors. Therefore, with this device, it is possible to provide photovoltaic plants with dual-axis solar tracking with a low-cost device that helps to optimise the trajectory of the trackers and, consequently, their radiative capture and energy production.

Sign in / Sign up

Export Citation Format

Share Document