BazTech - Yadda

1

Sizing of prosumer hybrid renewable energy systems in Poland

Bartecka M., Terlikowski P., Kłos M., Michalski Ł.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2020

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Vol. 68, nr 4

721--731

EN

Nowadays the demand for renewable energy sources is constantly growing. There are several reasons of such state, including requirements for energy-efficient new buildings and reduction of greenhouse gas emissions. An exemplary solution that may help to reduce “traditional” primary energy consumption is local energy source utilization. The article presents a simplified feasibility study of hybrid energy system under Polish law and economic conditions for a self-government unit, that is legally obliged to apply means of energy efficiency improvement. The aim of this paper is to provide a simple algorithm to find optimal hybrid PV and wind power source sizing for a prosumer. Resource data used in analyses are imported from Photovoltaic Geographical Information System and cover a period of one year. The paper includes two different methodologies applied to solve the problem of optimal hybrid energy system sizing. The first approach is heuristic and based on monthly energy balancing while the second is iterative and takes into account hourly energy balance. The results from both methods are compared and verified by HomerPro software, that shows significant differences between two algorithms. At the end economic assessment based on Net Present Value method is performed.

2

Techno-economic analysis of off-grid renewable energy power station: A case study

Liu L. Q., Liu C. X.

Przegląd Elektrotechniczny

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2012

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R. 88, nr 7a

94-98

EN

This paper gives the techno-economic analysis of a wind-PV-diesel system with storage battery backup for an off-grid power station specially located in Dongwangsha, studying data from a particular site in littoral China. The simulation and optimization results indicated the most optimized sizing of hybrid system. Moreover, the sensitivity analysis is discussed at a diesel price of 2$/L and annual average wind speed of 4.41 m/s and interest rate of 6%. The proposed hybrid system is more cost effective and environmental friendly than the diesel only system.

PL

W artykule przestawiono techniczno-ekonomiczną analizę systemu energetycznego składającego się z urządzeń wiatrowych, fotowoltaicznych i silnikiem Diesla oraz baterii magazynującej na przykładzie sieci w miejscowości Dongwagsha w Chinach. Rezultaty symulacji i optymalizacji pokazały, że system hybrydowy jest znacznie korzystniejszy niż tylko oparty na silniku Diesla.

3

Problems of Broadband in Rural Areas in Light of the BReATH Project Experiences

Białoń P.

Journal of Telecommunications and Information Technology

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2008

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nr 4

97-103

EN

Some lessons learned from the EU project "Broadband e-Services and Access to the Home" (2005-2007) are presented concerning the broadband development in rural ar- eas. In particular, the paper discusses the common problems of broadband deployment in the rural environment, various aspects of stimulating demand for broadband, the limitations of public aid and, most importantly, the problems of technoeconomic analysis.