scholarly journals The Use of the Photovoltaic System in Combination With a Thermal Energy Storage for Heating and Thermoelectric Cooling

2018 ◽  
Vol 8 (10) ◽  
pp. 1750 ◽  
Author(s):  
Jan Skovajsa ◽  
Martin Zalesak
Keyword(s):  
Renewable Energy ◽  
Thermal Energy ◽  
Renewable Energy Sources ◽  
Thermal Capacity ◽  
Photovoltaic System ◽  
Energy Sources ◽  
Thermoelectric Cooling ◽  
Cooling Mode ◽  
Thermoelectric Coolers ◽  
Heating And Cooling

The article is focused on the research of the usage of modern accumulation technology. The proposed system is able to improve the thermal comfort of building interiors. That text depicts the technology, which uses a photovoltaics and other renewable energy sources for active heating and cooling. The bases of the presented technology are the phase change material and thermal energy storages. So, it passively improves the thermal capacity of the constructions of the buildings. Moreover, there is a possibility to use it for active heating and cooling. The technology contains thermoelectric assemblies, so, there is a very interesting possibility to store thermal energy with use of renewable energy sources (such as photovoltaic system) and thermoelectric coolers side by side. In the manuscript, there are shown measurements and results of the active operating modes of proposed technology. It was found the technology is able to work in active heating and cooling modes. It works quite well in active heating mode. On the other hand, thermoelectric cooling mode had a problem with overheating. In the end, the problem was solved and the cooling mode works. The measurements and results are described in the text.

scholarly journals Analysis of District Heating and Cooling Energy Systems in Spain: Resources, Technology and Management

2021 ◽  
Vol 13 (10) ◽  
pp. 5442
Author(s):  
Beatriz María Paredes-Sánchez ◽  
José Pablo Paredes ◽  
Natalia Caparrini ◽  
Elena Rivo-López
Keyword(s):  
Renewable Energy ◽  
Energy Conversion ◽  
Thermal Energy ◽  
Renewable Energy Sources ◽  
District Heating ◽  
Energy Transition ◽  
Energy Sources ◽  
Total Production ◽  
District Heating System ◽  
Heating And Cooling

District heating and cooling (DHC) systems play an important role under the new European Union (EU) energy transition strategy. Thermal energy networks are helping to stimulate the development of alternative technologies based on a broad range of renewable energy sources. The present study analysed the current situation of DHC systems in Spain and provides an overview of the challenges and future opportunities that their use will entail. Its objective is to assess thermal energy conversion and management from a holistic perspective, including a study of existing energy infrastructures. The focus of this study lies on Spain given the country’s abundance of natural resources such as renewable energy sources including solar energy, biomass and geothermal energy, among others, as well as its strategic location on the map of the EU. Based on the analysis of the three factors for energy conversion in a district heating system, namely resources, technology, and management, the methodology provided an assessment of the different factors involved in running a DHC system. The results show an estimated total production for DHC networks of 1448 MWth, of which 72% is supplied purely by renewable energy sources.

DEVELOPMENT OF CONSTRUCTION OF THREE-INPUT GENERATING INSTALLATIONS ON BASED OF RENEWABLE ENERGY SOURCES

2018 ◽  
Author(s):  
Я.М. КАШИН ◽  
Л.Е. КОПЕЛЕВИЧ ◽  
А.В. САМОРОДОВ ◽  
Ч. ПЭН
Keyword(s):  
Renewable Energy ◽  
Kinetic Energy ◽  
Total Energy ◽  
Thermal Energy ◽  
Output Voltage ◽  
Renewable Energy Sources ◽  
Electrical Energy ◽  
Energy Sources ◽  
Voltage Regulator ◽  
The Sun

Описаны конструктивные особенности трехвходовой аксиальной генераторной установки (ТАГУ), преобразующей кинетическую энергию ветра и световую энергию солнца и суммирующей механическую, световую и тепловую энергию с одновременным преобразованием полученной суммарной энергии в электрическую. Показаны преимущества ТАГУ перед двухвходовыми генераторными установками. Дополнительное включение стабилизатора напряжения в схему ТАГУ позволило расширить область применения стабилизированной трехвходовой аксиальной генераторной установки за счет стабилизации ее выходного напряжения. The design features of the three-input axial generating installation (TAGI), which converts the kinetic energy of wind and light energy of the sun and sums the mechanical, light and thermal energy with the simultaneous conversion of the total energy into electrical energy, are described. The benefits of TAGI in front of the two-input generating installation shown. The additional introduction of a voltage regulator into the TAGI scheme allowed to expand the scope of the stabilized three-input axial generating installation by stabilizing its output voltage.

scholarly journals Optimisation of Energy Accumulation for Renewable Energy Sources

2021 ◽  
Vol 19 ◽  
pp. 205-210
Author(s):  
Milan Belik ◽  
Keyword(s):  
Renewable Energy ◽  
Model Building ◽  
Residential Buildings ◽  
Renewable Energy Sources ◽  
Photovoltaic System ◽  
Energy Sources ◽  
Pv System ◽  
Energy Accumulation ◽  
Wind Power Station ◽  
Future Production

This project focuses on optimisation of energy accumulation for various types of distributed renewable energy sources. The main goal is to prepare charging – discharging strategy depending on actual power consumption and prediction of consumption and production of utilised renewable energy sources for future period. The simulation is based on real long term data measured on photovoltaic system, wind power station and meteo station between 2004 – 2021. The data from meteo station serve as the input for the simulation and prediction of the future production while the data from PV system and wind turbine are used either as actual production or as a verification of the predicted values. Various parameters are used for trimming of the optimisation process. Influence of the charging strategy, discharging strategy, values and shape of the demand from the grid and prices is described on typical examples of the simulations. The main goal is to prepare and verify the system in real conditions with real load chart and real consumption defined by the model building with integrated renewable energy sources. The system can be later used in general installations on commercial or residential buildings.

scholarly journals EXPERIMENTAL MODEL OF A COMBINED THERMAL SYSTEM FOR EFFICIENT USE OF RENEWABLE ENERGIES

2020 ◽  
Vol 60 (1) ◽  
pp. 287-294
Author(s):  
C. Dumitrescu ◽  
R. Rădoi ◽  
C. Cristescu ◽  
L. Dumitrescu
Keyword(s):  
Renewable Energy ◽  
Experimental Model ◽  
Thermal Energy ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Thermal System ◽  
Remote Areas ◽  
Energy Independence ◽  
Atmospheric Factors ◽  
Series Product

The article presents an experimental model of a modular structure system for the production of thermal energy and the results of conducting specific tests. The experimental model uses two renewable energy sources - solar energy and energy generated by burning biomass - to provide thermal energy for an increased duration, regardless of the atmospheric factors. Properly sized, the system can be designed as a series product, in a variety of powers, to be used by heat suppliers, and also by individuals, especially the ones from remote areas, who want to ensure their thermal energy independence by using renewable energy.

scholarly journals Selected issues of the design of electrical installation RES type on the example of a home photovoltaic plant

2018 ◽  
Vol 19 (12) ◽  
pp. 66-74
Author(s):  
Marcin Chrzan ◽  
Daniel Pietruszczak ◽  
Mirosław Wiktorowski
Keyword(s):  
Renewable Energy ◽  
System Design ◽  
Renewable Energy Sources ◽  
Photovoltaic System ◽  
Energy Sources ◽  
Photovoltaic Plant ◽  
Electrical Installation

The paper presents issues related to renewable energy sources and their current use. Home photovoltaic installations RES and their types are discussed. It presents the benefits that a basic household can derive from it. Details of the photovoltaic system design in a monocular house are described.

Solar energy utilization in overall energy budget of the Johann Gregor Mendel Antarctic station during austral summer season

2015 ◽  
Vol 5 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Petr Wolf
Keyword(s):  
Renewable Energy ◽  
Nuclear Power ◽  
Renewable Energy Sources ◽  
Austral Summer ◽  
Energy Utilization ◽  
Photovoltaic System ◽  
Energy Sources ◽  
Research Activities ◽  
Gregor Mendel ◽  
Johann Gregor Mendel

It is well known that the utilization of renewable energy sources is inevitable for a sustainable future. Besides the fact that other energy sources such as coal, gas or nuclear power have limited reserves the proper use of increasingly higher shares of renewable energy sources may lower negative impacts of traditional energy sources on the ecosystems. This is especially important in naturally protected areas located in remote Earth locations. Such areas are still almost untouched by mankind, e.g. Antarctica. The research activities in the area of renewable energy sources have increased rapidly within the last few decades. It is of a global interest to carry out the research in an ecologically sensitive way, i.e. balance the outputs and the effects of infrastructure on environment. In this paper, a project of installation of a photovoltaic system on the Czech Antarctic Station (Johann Gregor Mendel) on the James Ross Island is described and the first experience from the system run is reported. The contribution of this system to the overall energy production on this station shortly after commissioning of the system is presented as well. In discussion, a possible future development of the system is suggested.

Considerations on Economic Optimization of the Relationship Insulation - Thermal Energy Sources Insurance for Civil Building

2014 ◽  
Vol 659 ◽  
pp. 463-468
Author(s):  
Adrian Alexandru Şerbănoiu ◽  
Gabriel Teodoriu ◽  
Bogdan Serbanoiu ◽  
Ion Serbanoiu ◽  
Marina Verdeș ◽  
...  
Keyword(s):  
Energy Source ◽  
Renewable Energy ◽  
Thermal Energy ◽  
Renewable Energy Sources ◽  
Building Envelope ◽  
Energy Sources ◽  
Economic Optimization ◽  
Major Objective ◽  
Financial Perspective ◽  
The Relationship

The major objective of this paper is to optimize the relationship insurance energy source - high thermal insulation of the building envelope analyzed in order to minimize the financial effort incurred by the beneficiary. In this respect, the paper proposes a methodology for analyzing the financial perspective of the relation envelope - equipment that capitalizes renewable energy sources, built on a newer concept - optimal cost.

scholarly journals Clean Energy for Cooling and Heating with Ground Source Heat Pumps

2019 ◽  
Vol 3 (2) ◽  
Keyword(s):  
Renewable Energy ◽  
Alternative Energy ◽  
Renewable Energy Sources ◽  
Clean Energy ◽  
Heat Pumps ◽  
Hot Water ◽  
Energy Sources ◽  
Ground Source Heat Pumps ◽  
Heating And Cooling ◽  
Ground Source

In the recent attempts to stimulate alternative energy sources for heating and cooling of buildings, emphasise has been put on utilisation of the ambient energy from ground source heat pump systems (GSHPs) and other renewable energy sources. Exploitation of renewable energy sources and particularly ground heat in buildings can significantly contribute towards reducing dependency on fossil fuels. The study was carried out at the Energy Research Institute (ERI), between September 2016 and November 2017. This paper highlights the potential energy saving that could be achieved through use of ground energy source. The main concept of this technology is that it uses the lower temperature of the ground (approximately <32°C), which remains relatively stable throughout the year, to provide space heating, cooling and domestic hot water inside the building area. The purpose of this study, however, is to examine the means of reducing of energy consumption in buildings, identifying GSHPs as an environmental friendly technology able to provide efficient utilisation of energy in the buildings sector, promoting the use of GSHPs applications as an optimum means of heating and cooling, and presenting typical applications and recent advances of the DX GSHPs. It is concluded that the direct expansion of GSHP are extendable to more comprehensive applications combined with the ground heat exchanger in foundation piles and the seasonal thermal energy storage from solar thermal collectors. This study highlights the energy problem and the possible saving that can be achieved through the use of the GSHP systems. This article discusses the principle of the ground source energy, varieties of GSHPs, and various developments.

scholarly journals Bio-Fuel in Lithuania’s Energetics: Geographical Analysis of Energy Crops and Forest Products

2016 ◽  
Vol 4 ◽  
pp. 33-46
Author(s):  
Vaidas Bondzinskas ◽  
Jurgita Mačiulytė
Keyword(s):  
Renewable Energy ◽  
Thermal Energy ◽  
Renewable Energy Sources ◽  
Forest Products ◽  
Energy Crops ◽  
Energy Sources ◽  
The European Union ◽  
Heating Systems ◽  
Short Rotation ◽  
Rotation Energy

Bio-fuel, used for production of thermal energy, is one of the most important renewable energy sources in Lithuania. The use of this energy source is determined by Lithuania‘s commitments to the European Union and the energetic policy carried out by the state, which encourages the use and replenishment of renewable energy sources. The article consists of three parts, which analyze the teritorial distribution of potential biofuel resources, i.e. short-rotation energy crops, realized forest products in Lithuania‘s forestry enterprises, and use of bio-fuel for production of thermal energy for Lithuania‘s centralized heating systems in 2012.

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