Potential and Analysis of Grid Integrated Renewables in Latvia

Shipkovs, P.; Kashkarova, Galina; Ļebedeva, Kristina; Migla, Lana; Snegirjovs, Andrejs; Shipkovs, Janis

doi:10.1016/j.egypro.2014.10.229

Cited by 8 publications

(4 citation statements)

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“…The structure of RES in this country is comprised of hydro, wind, biogas, and biomass power plants as well as RES-based CHP plants. The use of solar energy to generate electricity is not yet fully developed in this country [62]. In 2018, Latvia was the leader among the EU countries in terms of final energy consumption per GDP and energy production per GDP.…”

Section: Discussionmentioning

confidence: 99%

“…Estonia has already achieved its 2020 target for the share of energy from RES, yet the challenge will be to achieve the target of RES in transport. In the case of Denmark, the high position in relation to the adopted evaluation criteria results from the fact that this country started developing renewable energy production technologies in the 1970s and today is the European leader in wind energy [62]. In the ranking of the EU countries, Denmark systematically advanced from the 9th place in 2008 to the 6th place in 2018.…”

Section: Discussionmentioning

confidence: 99%

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Assessing the Level of Renewable Energy Development in the European Union Member States. A 10-Year Perspective

2021

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The global economic development is, to a great extent, dependent on access to large amounts of cheap energy sources. The growing social awareness of ecology and the enormous damage to the Earth’s ecosystem due to the production of energy from conventional sources have forced fundamental changes in the energy sector. Renewable energy is considered to be an opportunity for such changes. The current state of the art allows such changes to be made without restricting economic development. Therefore, activities related to the energy transition are being taken all over the world. The European Union has definitely managed to achieve the most tangible effects in this regard. This article presents the findings of the research aimed at presenting the current state of renewable energy in the European Union and analyzing the changes reported in this sector in the last decade. The research was carried out using a selected set of 11 indicators characterizing renewable energy in individual countries. These indicators were selected on the basis of literature review and own studies of the state of renewable energy and its development prospects. Based on these indicators, changes in the energy structure of individual European Union countries between 2008–2018 were determined. The study is divided into two main stages. The principal components analysis (PCA) was used for the first analysis. In turn, the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) was adopted to assess the level of renewable energy development in the European Union countries. Both these methods and the extended statistical analysis were applied to determine the state of renewable energy development in the European Union countries in the studied period and to divide the Member States into classes with different levels of development. The results of the study showed that the EU countries are characterized by significant differences in the development of RES during the period in question. The unquestionable leaders in this respect are Sweden, Austria, Finland, and Latvia. Based on the findings, it is possible to evaluate the effects of activities related to renewable energy development and to prepare assumptions for future activities. Additionally, both the research and its findings broaden the knowledge of the directions of renewable energy development in individual European Union countries. This is particularly important in the context of changes related to the need to reduce harmful substance emissions and the implementation of the European Green Deal idea.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Assessing the Level of Renewable Energy Development in the European Union Member States. A 10-Year Perspective

2021

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“…There have been several studies on possibilities of using solar energy in Latvia starting already from the end of the last century [5], however, until now, it was considered that solar energy is rather costly [6] and in northern areas, like Latvia, the amount of solar energy is limited during wintertime, which complicates using solar energy as the only energy source [7]. As the price of solar panels has been decreasing significantly during the last 10 years, the economy of solar energy generation is gradually becoming more feasible in Latvia, although governmental support would still be needed [8].…”

Section: Introductionmentioning

confidence: 99%

Opportunities for electric vehicle fast charging networks in Northern regions using smart charging

Rubenis

Tropins

Adrian

2019

Engineering for Rural Development

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The article examines the possibilities of charging electric vehicles from renewable resources in Latvia. Electric vehicles (EV) have been recognized as a way to decrease CO2 emissions in the transportation sector. Still, the real benefit of EV's depends on the source of the energy. Solar energy has been established to become a viable source for environmentally friendly energy as the costs of solar panels have been decreasing. However, in northern areas the amount of solar energy is limited during wintertime, which complicates using solar energy as the only energy source. This article models two possible operational scenarios for energy consumption for EV charging, based on empirical data from charging station use in Latvia-one prioritizing energy security, the other-use of locally produced solar energy. The article then evaluates how both scenarios perform, by looking at the capacity for energy production from photovoltaics obtained from solar radiation data in Latvia and combining with an option of energy storage in batteries. It then assesses the costs for solar energy comparing with the energy price in the grid, to estimate the economic benefits of using solar energy for EV charging. The results of the research show that for northern regions like Latvia solar energy can be effectively used to bring down the energy costs by 31 % compared with the standard scenario, with the algorithm preferring local energy being more cost-efficient at the same grid connection level, but the security prioritizing algorithm performing better altogether, by allowing larger grid connection power level decrease.

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“…Therefore, also almost all studies in this branch are concentrated in these countries, only one article [3] from several hundred has been found related to use of solar energy in latitudes higher than 50º. In northern countries, for example in Latvia, solar energy has been used [4], but mainly in the same kinds as in the southern ones without taking into account the particularities of use of solar energy in higher latitudes. Among other peculiarities [5], in this case the most important role is played by lower ambient temperature.…”

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confidence: 99%

Water heating with tracking to sun solar batteries

Pelece¹,

Putans²,

Ziemelis³

et al. 2017

Engineering for Rural Development

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Abstract.Traditionally it has been considered that solar collectors are more effective for water heating than solar batteries (PV) because of changing of energy from heat to electricity and then back to heat in the case of batteries. But there are some aspects why solar batteries can be more effective for water heating than solar collectors, especially in northern countries, where ambient temperature is low. The first of them is negative impact of temperature difference between the absorber of the solar collector and ambient air on the efficiency of the solar collector. Therefore, efficiency of the solar collector importantly decreases with increasing of the temperature of the obtained hot water. The efficiency of solar batteries only slightly depends on temperature and, opposite to the case of solar collectors, is higher at lower ambient temperature. The same situation is at the heat exchanger traditionally used with the solar collector: the amount of heat given from the heat carrier to usable water depends on the temperature difference between them. Electricity from solar batteries heats water independently on its temperature. Also tracking to sun is more complicated for solar collectors than for solar batteries. Water heating using tracking to sun solar batteries has been studied in this work. Two photovoltaic panels Solet P6.60-WF-250 with surface area 3.25 m 2 each, mounted on a dual axis tracking device, were used for water heating with electrical resistance heaters. Measurements were carried out from 1 of August till 22 of October 2016. The results show that the measured power of batteries on sunny October day is approximately 500 W and 28 l reservoir without heat insulation of water has been heated up to 50...70 °C, or by 30 °C during 2h what corresponds to 490 W received power. An opposite dependence of the photovoltaic efficiency on ambient temperature also has been observed.Keywords: solar energy, solar batteries, tracking to sun, water heating. IntroductionSolar collectors are used mainly for water heating. Only one study [1] has been found where photovoltaic are used together with the conventional heating system. It can be explained by particularities in use of solar radiation in different latitudes. The main solar energy using countries are in low latitudes: the leading countries are China, Turkey, Brazil and India [2]. Therefore, also almost all studies in this branch are concentrated in these countries, only one article [3] from several hundred has been found related to use of solar energy in latitudes higher than 50º. In northern countries, for example in Latvia, solar energy has been used [4], but mainly in the same kinds as in the southern ones without taking into account the particularities of use of solar energy in higher latitudes. Among other peculiarities [5], in this case the most important role is played by lower ambient temperature.Although efficiency of photovoltaic is only about 0.2 (or even 0.15 for large-scale production), but of solar collectors it is up to 0.75 (or approximately ...

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Potential and Analysis of Grid Integrated Renewables in Latvia

Cited by 8 publications

References 1 publication

Assessing the Level of Renewable Energy Development in the European Union Member States. A 10-Year Perspective

Assessing the Level of Renewable Energy Development in the European Union Member States. A 10-Year Perspective

Opportunities for electric vehicle fast charging networks in Northern regions using smart charging

Water heating with tracking to sun solar batteries

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