A new method for typical weather data selection to evaluate long-term performance of solar energy systems

2002 ◽  
Vol 43 (3) ◽  
pp. 199
2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Haixiang Zang ◽  
Qingshan Xu ◽  
Pengwei Du ◽  
Katsuhiro Ichiyanagi

A modified typical meteorological year (TMY) method is proposed for generating TMY from practical measured weather data. A total of eleven weather indices and novel assigned weighting factors are applied in the processing of forming the TMY database. TMYs of 35 cities in China are generated based on the latest and accurate measured weather data (dry bulb temperature, relative humidity, wind velocity, atmospheric pressure, and daily global solar radiation) in the period of 1994–2010. The TMY data and typical solar radiation data are also investigated and analyzed in this paper, which are important in the utilizations of solar energy systems.


2003 ◽  
Vol 125 (2) ◽  
pp. 203-206 ◽  
Author(s):  
L. Sanidad ◽  
Y. Baghzouz ◽  
R. Boehm ◽  
E. Hodge

A compact stand-alone PV power system was recently designed and built to run an air sampler for environmental monitoring at the Nevada Test Site. This paper presents an overview of the system design and analysis of some of the recorded daily cycles of various power flows during the summer period. The system long-term performance during both high and low solar resource periods is simulated with the computer code PVFORM using historical weather data.


2018 ◽  
Vol 10 (10) ◽  
pp. 3619 ◽  
Author(s):  
Camelia Delcea ◽  
Liviu-Adrian Cotfas ◽  
Nora Chiriță ◽  
Ionuț Nica

Boarding is one of the major processes of airplane turnaround time, with a direct influence on the airline companies’ costs. From a sustainable point of view, a faster completion of the boarding process has impact not only on the airline company’s long-term performance, but also on customers’ satisfaction and on the airport’s possibility of offering more services without additional investments in new infrastructure. Considering the airplane boarding strategies literature, it can be observed that the latest papers are dealing with developing faster boarding strategies, most of them considering boarding using just one-door of the aircraft. Even though boarding on one-door might be feasible for the airports having the needed infrastructure and sufficient jet-bridges, the situation is different in European airports, as the use of apron buses is fairly common. Moreover, some of the airline companies have adapted their boarding pass in order to reflect which door one should board once they get down from the bus. While using these buses, the boarding strategies developed in the literature are hard to find their applicability. Thus, a new method for boarding on two-door airplanes when apron buses are used is proposed and tested against the actual boarding method. A model is created in NetLogo 6.0.4, taking advantages of the agent-based modeling and used for simulations. The results show a boarding time reduction of 8.91%.


Author(s):  
Sami Yamani Douzi Sorkhabi ◽  
Ahmed Mahmoud ◽  
Shakya Sur ◽  
Elan Pavlov ◽  
Amy Bilton

Over the past several decades, the wild capture fisheries have become unsustainable and the practice of small-scale aquaculture has increased in the rural areas of developing countries. In aquaculture ponds, it is critical to maintain adequate levels of dissolved oxygen to ensure productivity and fish health. To provide adequate dissolved oxygen, aeration systems can be employed. However, the current aeration systems are expensive and require secure access to electricity, putting them out of reach for developing world applications. To address this need, a simple aeration system powered by solar energy, called a Solar Updraft Aerator (SUpA) is proposed. SUpA induces convection in the pond by directing absorbed solar energy to deeper pond layers, increasing the dissolved oxygen level. To be effective, SUpA needs to provide adequate dissolved oxygen even when there are multiple days of low sunlight. This research estimates the long-term performance of SUpA under different weather conditions and for a period of 15 to 18 years. Through this process, the dissolved oxygen level of the aquaculture pond is simulated with and without SUpA system to evaluate the magnitude of the influence. The results indicate that SUpA can significantly reduce the number of hours that the dissolved oxygen level is below the needed threshold.


2011 ◽  
Vol 133 (4) ◽  
Author(s):  
Donghyun Seo ◽  
Moncef Krarti

A new model is developed to predict hourly solar radiation for any climate zone worldwide. The model solar radiation predictions are suitable to generate typical weather files used to evaluate the long-term performance of renewable energy systems and building energy systems. The predictions of the new solar model are compared as well as measured solar radiation data obtained for several weather stations located in various climate zones worldwide. It is found that the new solar model is able to estimate monthly solar radiation with a 7% prediction error for secondary stations and 2% prediction error for primary stations.


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