Preliminary investigations on two different procedures to calculate the efficiency and performance ratio of PV modules

2019-09-01
Ozden, T.
Akinoglu, B. G.
Show full item record
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
163
views
0
downloads
Short- and long-term outdoor performances of the photovoltaic (PV) modules are extremely important in reaching their economic viabilities. Such information is very valuable for the investors, customers and researchers of PV technologies. Two different procedures are possible, and both are used by many researchers. However, to the best of our knowledge, there is no comparative investigation to evaluate these two procedures. One of the methods uses instantaneous I-V curves of PV modules taken in a specified instant of time, while the others simply use the integrated energy values of the input and the yield of PV modules. In fact, both have advantages and disadvantages. In the present work, we outlined the advantages and disadvantages of both methods and compared them using the data of two different cell-type modules which are installed at GuNAM's outdoor test facility. In the analysis, the data that we used are taken under the same outdoor test conditions and ambient weather conditions. The outcomes of these preliminary analyses can be summarized as follows: (1) The procedure that uses instantaneous I-V curves seems dependent on the specified time intervals and ambient weather conditions at that instant; (2) accordingly, we will propose how to determine an optimal time interval to reach better performance results; (3) using the integrated values, we achieved the variations in performances with different integration time periods; (4) preliminary comparisons of these two procedures resulted in key conclusions on performance and degradation calculations of PV modules.
Environmental Engineering, General Agricultural and Biological Sciences, Environmental Chemistry
https://hdl.handle.net/11511/64386
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
Department of Physics, Article

Suggestions

Investigation of the spatial relationship of municipal solid waste generation in Turkey with socio-economic, demographic and climatic factors
Keser, Saniye; Aksoy, Ayşegül; Department of Environmental Engineering (2010)
This thesis investigates the significant factors affecting municipal solid waste (MSW) generation in Turkey. For this purpose, both spatial and non-spatial tech¬niques are utilized. Non-spatial technique is ordinary least squares (OLS) regression while spatial techniques employed are simultaneous spatial autoregression (SAR) and geographically weighted regression (GWR). The independent variables include socio-economic, demographic and climatic indicators. The results show that nearer provinces tend to have ...
Assessment of the best available wastewater management techniques for a textile mill: cost and benefit analysis
Doğan, Buğçe; Yetiş, Ülkü; Department of Environmental Engineering (2008)
The Integrated Pollution Prevention and Control (IPPC) Directive from the European Union strives to achieve a high level of environmental protection by preventing or reducing the pollution emanating from industrial installations directly at the source. The Directive implies that the emission limit values should be set in accordance with each industry’s Best Available Techniques (BAT). In the present study, water recovery and wastewater treatability alternatives developed beforehand were evaluated towards th...
Assessing the effects of wind farms on soil organic carbon.
Pekkan, Ozge Isik; Şenyel Kürkçüoğlu, Müzeyyen Anıl; Cabuk, Saye Nihan; Aksoy, Talha; Yilmazel, Burcu; Kucukpehlivan, Tuncay; Dabanli, Ahmet; Cabuk, Alper; Cetin, Mehmet (Springer Science and Business Media LLC, 2021-01-06)
Wind energy is considered one of the cleanest and most sustainable resources among renewable energy sources. However, several negative environmental impacts can be observed, unless suitable sites are selected for the establishment of wind farms. The aim of this study is to determine the change in the soil organic carbon (SOC) stock resulting from land cover changes that were caused by wind farm establishments in the Karaburun peninsula. Within the scope of the study, remote sensing and geographic informatio...
Comparison of iscst3 and aermod air dispersion models: case study of cayirhan thermal power plant
Dölek, Emre; Atımtay, Aysel; Department of Environmental Engineering (2007)
In this study, emission inventory was prepared and pollutant dispersion studies were carried out for the area around Çayırhan Thermal Power Plant to determine the effects of the plant on the environment. Stack gas measurement results were used for the emissions from the power plant and emission factors were used for calculating the emissions from residential sources and coal stockpiles in the study region. Ground level concentrations of SO2, NOx and PM10 were estimated by using EPA approved dispersion model...
Investigation of PCB pollution: method validation and case studies from Ankara
Akduman, Nazan; İmamoğlu, İpek; Department of Environmental Engineering (2009)
Polychlorinated biphenyls (PCBs) are persistent organic pollutants which were not produced in Turkey, however both national and international studies illustrate a measurable amount of PCB pollution in receiving environments, aquatic fauna and people. In this study, various information sources such as the national and international scientific literature, official records and reports are investigated to obtain information regarding PCB pollution in Turkey. Furthermore, various PCB pollution analysis technique...
Citation Formats
T. Ozden and B. G. Akinoglu, “Preliminary investigations on two different procedures to calculate the efficiency and performance ratio of PV modules,” INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY, pp. 5171–5176, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/64386.
METU IIS - Integrated Information Service open@metu.edu.tr