scholarly journals Precision and performance of an 180g solar-powered GPS device for tracking medium to large-bodied terrestrial mammals

2020 ◽  
Vol 2020 (3) ◽  
Author(s):  
Emma E. Hart ◽  
Julian Fennessy ◽  
Henrik B. Rasmussen ◽  
Michael Butler-Brown ◽  
Arthur B. Muneza ◽  
...  
Keyword(s):  
Terrestrial Mammals ◽  
And Performance ◽  
Solar Powered ◽  
Gps Device

scholarly journals A study on the reliability and performance of solar powered street lighting systems

2017 ◽  
Vol 5 (2) ◽  
pp. 110 ◽  
Author(s):  
Adebayo Fashina ◽  
Salifu Azeko ◽  
Joseph Asare ◽  
Chukwuemeka Ani ◽  
Vitalis Anye ◽  
...  
Keyword(s):  
Performance Indicators ◽  
Performance Ratio ◽  
Energy Yield ◽  
Street Lighting ◽  
Technical Performance ◽  
Humid Environment ◽  
Total Failure ◽  
Lighting Systems ◽  
And Performance ◽  
Solar Powered

This paper presents the results of a study on the reliability and performance of the solar-powered street lighting systems installed at the African University of Science and Technology (AUST) in Nigeria, a hot and humid environment. The technical performance of the systems was studied using the following performance indicators: system energy yield, capture loss, as well as the system performance ratio while the reliability of the systems was examined using a model developed from the findings from the maintenance and fault diagnosis of the systems. The model was used to predict the total failure and survival probability of the systems using the Weibull distribution. The performance evaluation during the monitored period (February 2012 to January 2015) indicated that the performance ratios of the systems vary from 70% to 89% and the energy yields of the systems ranging from 2.87 h/day to 5.57 h/day. The results from the reliability analysis also showed that when the stress concentration factor around the notch between the cable terminals in the charge controller increases, the charge controller will become overheated, which in turn affected other components of the systems. The implications of this study are also discussed for the design and development of future solar-powered street lighting systems.

Design and Performance of Small Scale Solar Powered Water Desalination Systems, Utilizing Reverse Osmosis

2000 ◽  
Vol 122 (4) ◽  
pp. 170-175 ◽  
Author(s):  
K. B. Franc¸a ◽  
H. M. Laborde ◽  
H. Neff
Keyword(s):  
High Pressure ◽  
Energy Consumption ◽  
Feed Solution ◽  
Water Desalination ◽  
Small Scale ◽  
Feed Water ◽  
High Pressure Pump ◽  
And Performance ◽  
Solar Powered ◽  
Power Needs

A small scale solar powered desalination system has been designed, analyzed, and optimized with regard to power needs and energy consumption. Both quantities scale linearly with the concentration of the total dissolved salt concentration (TDS) in the feed solution. The desalination of brackish water at a TDS value of 3,000 ppm requires an energy of approximately 1.5 kWh/m3. For seawater at a TDS value of 34,000 ppm, this value increases to 9.5 kWh/m3. The selected type of membrane, the system design, and, in particular, the efficiency of the high pressure pump crucially affect energy consumption. The desalination cost also has been estimated for a small scale system that linearly scale with the TDS value of the feed water. [S0199-6231(00)00104-0]

scholarly journals Development and Performance Testing of Solar Operated Insecticide and Pesticide Agro Spraying System

2019 ◽  
Vol 9 (1) ◽  
pp. 573-578
Keyword(s):  
Low Cost ◽  
Labour Productivity ◽  
Operating Time ◽  
Performance Testing ◽  
Maintenance Cost ◽  
Pump Efficiency ◽  
Agricultural Field ◽  
Low Efficiency ◽  
And Performance ◽  
Solar Powered

This paper represents the development and performance analysis of Solar operated Spraying system. Generally in the agricultural field, traditional conventional techniques like hand operated and fuel operated sprayer system for spraying pesticides have been used which is not eco-friendly, less labour productivity and low efficiency. These tools uses diesel as fuels which is harmful for the environment and also do increases the operating and maintenance cost. This motivates us to design and fabricate real-time product which is operated by solar energy. The main objective of this research is to design and fabricate the solar powered agricultural pesticide sprayer by considering parameters like desired spraying capacity, low weight, low cost, user-friendly nature, high operating time and for faster coverage of area. Mathematical models were developed after adopting suitable assumptions for calculation of power of the motor and sizing of battery, charge controller, solar panel required for spraying a known quantity of fluid. The parts required for the system had been selected by solving for known inputs values and considering their availability in the market. The maximum discharge at outlet of DC Pump, efficiency of pump had been calculated by taking different discharge at outlet of the pump. Further by using 12 Volt Led light, it can be operated in night mode and also is to reduce back pain of human being by keeping the tank in backside.

Solar-Powered/Fuel-Assisted Rankine-Cycle Power and Cooling-System: Simulation Method and Seasonal Performance

1984 ◽  
Vol 106 (2) ◽  
pp. 142-152 ◽  
Author(s):  
N. Lior ◽  
K. Koai
Keyword(s):  
Cooling System ◽  
Rankine Cycle ◽  
Simulation Method ◽  
Climatic Regions ◽  
Organic Rankine Cycles ◽  
The Subject ◽  
And Performance ◽  
Solar Powered ◽  
Solar Cooling System ◽  
Hourly Basis

The subject of this analysis is a solar cooling system based on a novel hybrid steam Rankine cycle. Steam is generated by the use of solar energy collected at about 100° C, and it is then superheated to about 600° C in a fossil-fuel-fired superheater. The addition of about 20–26 percent of fuel doubles the power cycle’s efficiency as compared to organic Rankine cycles operating at similar collector temperatures. A comprehensive computer program was developed to analyze the operation and performance of the entire power/cooling system. Transient simulation was performed on an hourly basis over a cooling season in two representative climatic regions (Washington, D.C. and Phoenix, Ariz.). One of the conclusions is that the seasonal system COP is 0.82 for the design configuration and that the use of water-cooled condensers and flat-plate collectors of higher efficiency increases this value to 1.35.

scholarly journals Financial and Performance Analyses of Microcontroller Based Solar-Powered Autorickshaw for a Developing Country

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Abu Raihan Mohammad Siddique ◽  
M. Shamim Kaiser
Keyword(s):  
Discharge Rate ◽  
Dc Motor ◽  
Cost Ratio ◽  
Battery Life ◽  
Motor Speed ◽  
Cost Of Energy ◽  
Present Worth ◽  
And Performance ◽  
Solar Powered ◽  
Dc Motor Driver

This paper presents a case study to examine the economic viability and performance analysis of a microcontroller based solar powered battery operated autorickshaw (m-SBAR), for the developing countries, which is compared with different types of rickshaws such as pedal rickshaw (PR), battery operated autorickshaw (BAR), and solar-powered battery operated autorickshaw (SBAR), available in Bangladesh. The BAR consists of a rickshaw structure, a battery bank, a battery charge controller, a DC motor driver, and a DC motor whereas the proposed m-SBAR contains additional components like solar panel and microcontroller based DC motor driver. The complete design considered the local radiation data and load profile of the proposed m-SBAR. The Levelized Cost of Energy (LCOE) analysis, Net Present Worth, payback periods, and Benefit-to-Cost Ratio methods have been used to evaluate the financial feasibility and sensitivity analysis of m-SBAR, grid-powered BAR, and PR. The numerical analysis reveals that LCOE and Benefit-to-Cost Ratio of the proposed m-SBAR are lower compared to the grid-powered BAR. It has also been found that microcontroller based DC motor control circuit reduces battery discharge rate, improves battery life, and controls motor speed efficiency.

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