scholarly journals Overall Efficiency of On-Site Production and Storage of Solar Thermal Energy

2021 ◽  
Vol 13 (3) ◽  
pp. 1360
Author(s):  
Teodora M. Șoimoșan ◽  
Ligia M. Moga ◽  
Livia Anastasiu ◽  
Daniela L. Manea ◽  
Aurica Căzilă ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Thermal Energy ◽  
Urban Areas ◽  
Renewable Energy Sources ◽  
Multicriteria Analysis ◽  
High Energy ◽  
Solar Thermal ◽  
Solar Thermal Energy ◽  
The Impact ◽  
And Storage

Harnessing renewable energy sources (RES) using hybrid systems for buildings is almost a deontological obligation for engineers and researchers in the energy field, and increasing the percentage of renewables within the energy mix represents an important target. In crowded urban areas, on-site energy production and storage from renewables can be a real challenge from a technical point of view. The main objectives of this paper are quantification of the impact of the consumer’s profile on overall energy efficiency for on-site storage and final use of solar thermal energy, as well as developing a multicriteria assessment in order to provide a methodology for selection in prioritizing investments. Buildings with various consumption profiles lead to achieving different values of performance indicators in similar configurations of storage and energy supply. In this regard, an analysis of the consumption profile’s impact on overall energy efficiency, achieved in the case of on-site generation and storage of solar thermal energy, was performed. The obtained results validate the following conclusion: On-site integration of solar systems allowed the consumers to use RES at the desired coverage rates, while restricted by on-site available mounting areas for solar fields and thermal storage, under conditions of high energy efficiencies. In order to segregate the results and support optimal selection, a multicriteria analysis was carried out, having as the main criteria the energy efficiency indicators achieved by hybrid heating systems.

scholarly journals Modelling of A Solar Thermal Energy System For Energy Efficiency Improvement In A Ceramic Plant

2021 ◽  
Vol 6 ◽  
pp. 31
Author(s):  
Miguel Castro Oliveira ◽  
Muriel Iten
Keyword(s):  
Energy Efficiency ◽  
Thermal Energy ◽  
Heat Recovery ◽  
Energy System ◽  
High Energy ◽  
Solar Thermal ◽  
Industrial Plant ◽  
Thermal Processes ◽  
Solar Thermal Energy ◽  
Ceramic Plant

The thermal energy use in the manufacturing plants is the most representative parcel of the total energy consumption within the European industry. Such is mainly attributed to the operation of high energy intensive thermal processes such as furnaces and boilers. The implementation of heat recovery technologies is a solution with a great potential to improve the operation of these processes and improve the overall energy efficiency in a plant. On the other hand, the use of renewable energy resources such as solar energy is highly relevant measure to decrease the use of fossil fuels, such as natural gas. This paper presents the modelling of a solar thermal energy system (STES) established by a water circuit and solar thermal collector for the heat supply to two boilers installed in a ceramic plant. Such system has been conceptualised in the scope of industrial practices, proposing solar heat for industrial processes (SHIP). The practical work in this paper aims to the development of a customised simulation tool for the modelling of heat recovery networks and thermal processes in manufacturing industry plants using the Modelica language. The system model has been developed using existing and newly developed equipment models. The simulation results were validated with measured data in the industrial plant, being consistent with the real values (e.g. highest deviation of about 0.01%). In addition to the boilers, the performed simulation allowed to achieve the sizing of the components of the water circuit, in particular for the pumping system (with a required supply of 0.747 kW of electric energy). A techno-economic assessment has been performed to evaluate the viability of the cproposed solution, showing a payback time of approximately 3 years, a total annual economic savings of about 25209 € and associated reduction of equivalent carbon dioxide emissions of about 170 ton/year.

scholarly journals Technological Innovation in the Aspect of Safety in the Process of Heat Supply

2019 ◽  
Vol 1 (1) ◽  
pp. 412-418
Author(s):  
Aleksandra Wrzalik ◽  
Matevž Obrecht
Keyword(s):  
Energy Efficiency ◽  
Heat Supply ◽  
Renewable Energy Sources ◽  
District Heating ◽  
High Energy ◽  
The European Union ◽  
Heating Systems ◽  
Operation Conditions ◽  
Network Operation ◽  
The Impact

AbstractIn recent years heating in Poland has been transformed as a result of the priorities of the country's energy policy implemented within the European Union. The increase in energy security, the development of renewable energy sources and the fulfilment of legal and environmental requirements are very important. Exploitation of district heating systems should ensure reliable and safe heat supplies for industrial and municipal customers with high energy efficiency and reduction of environmental impact. The article discusses the conditions and directions of centralized heating systems development as well as technical and economic issues, which are important for the security of heat supply. The Author describes selected technological innovations used in the technical infrastructure for heat transfer and modern IT systems which are improving the management of heating systems. The article includes the results of simulation research with use of IT tools showing the impact of selected innovations on the improvement of network operation conditions. Directions of modernization of heating systems in the aspect of increasing energy efficiency and security of heat supply have also been indicted here.

scholarly journals Full Spectrum Solar Thermal Energy Harvesting and Storage by a Molecular and Phase-Change Hybrid Material

Joule ◽  
2019 ◽  
Vol 3 (12) ◽  
pp. 3100-3111 ◽  
Author(s):  
Varun Kashyap ◽  
Siwakorn Sakunkaewkasem ◽  
Parham Jafari ◽  
Masoumeh Nazari ◽  
Bahareh Eslami ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Phase Change ◽  
Thermal Energy ◽  
Hybrid Material ◽  
Solar Thermal ◽  
Solar Thermal Energy ◽  
Full Spectrum ◽  
Thermal Energy Harvesting ◽  
And Storage

scholarly journals Molecular solar thermal energy storage in photoswitch oligomers increases energy densities and storage times

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Mads Mansø ◽  
Anne Ugleholdt Petersen ◽  
Zhihang Wang ◽  
Paul Erhart ◽  
Mogens Brøndsted Nielsen ◽  
...  
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Solar Thermal ◽  
Solar Thermal Energy ◽  
Storage Times ◽  
And Storage

Novel photodriven composite phase change materials with bioinspired modification of BN for solar-thermal energy conversion and storage

2016 ◽  
Vol 4 (24) ◽  
pp. 9625-9634 ◽  
Author(s):  
Jie Yang ◽  
Guo-Qiang Qi ◽  
Li-Sheng Tang ◽  
Rui-Ying Bao ◽  
Lu Bai ◽  
...  
Keyword(s):  
Thermal Energy ◽  
Phase Change Materials ◽  
Solar Thermal ◽  
Solar Thermal Energy ◽  
Thermal Energy Conversion ◽  
Composite Phase Change Materials ◽  
Energy Conversion And Storage ◽  
And Storage ◽  
Novel Design ◽  
Design Guidance

A novel design guidance for the preparation of photodriven composite PCMs with greatly enhanced thermal conductivity based on the bioinspired modification of BN for solar-thermal energy storage is provided.

scholarly journals Modeling of the Solar Thermal Energy Use in Urban Areas

2020 ◽  
Vol 6 (7) ◽  
pp. 1349-1367 ◽  
Author(s):  
Drita Qerimi ◽  
Cvete Dimitrieska ◽  
Sanja Vasilevska ◽  
Arlinda Alimehaj Rrecaj
Keyword(s):  
Thermal Energy ◽  
Urban Areas ◽  
Model Simulation ◽  
Hot Water ◽  
Solar Thermal ◽  
Solar Thermal Energy ◽  
Promising Alternative ◽  
Solar Water ◽  
Water Heaters ◽  
The City

Most of the generated electricity in Kosovo is produced from fossil fuel, a part of the energy comes from the import, while participation of renewable resources is symbolic, and a bias between the grid extension and the load of power generated sometimes results in shortage of electricity and thus frequent power cuts. The use of renewable energy and particularly the solar thermal energy represents one of the most promising alternative strategies. In Kosovo, the global horizontal radiation ranges from 1241 kWh/m2 per year in Shterpce to 1461 kWh/m2 per year in Gjakova, while the average for Kosovo can be estimated at 1351 kWh/m2 per year. The average sun duration for the city of Pristine is 5.44 h, while the average horizontal irradiation is 3.79 kWh/m² per day. Participation of energy consumption in household is still dominant - about 41.4% of the total consumption in Kosovo, 15% of this energy is used for domestic hot water. This energy demand can be lowered significantly by using improved building construction techniques and utilization of RES-s, especially solar thermal. The first step is to map the city in different areas to locate suitable locations for the installation of solar collectors serving sanitary hot water. The demand for sanitary hot water varies from object to object, this variation depends on whether the building is individual or collective, school institutions or religious buildings, for this reason the classification of buildings was done according to the request for sanitary hot water. After that the demand for sanitary hot water is calculated for several different institutions: Residential houses, Dormitories and Hospitals. For all of the above-mentioned cases the data for: solar fraction, solar contribution, CO2 avoided, collector temperature, financial analysis etc. are gained using the TSOL 2018 software. To evaluate the active energy for a time period, the daily, monthly and annual performance for three systems which are located in University Clinical Center of Pristine, Kosovo have been analyzed. In addition the results of the mathematical model, simulation and measured solar energy contribution for solar station in Infective disease clinic have been compared. In this paper, a proposal for replacing the conventional water heaters with the domestic solar water heaters (DSWH) is made. A case study for 38289 Residential households in Pristine has been selected. The initial cost of the solar water heater for the city is 60113730 €. The system saves 7274910 € annually and reduced C𝑂2 emission by 22973400 kg. The results from the paper show that the DSWH is economically feasible in Pristine and can result in fuel saving and CO2 emission reduction.

Sign in / Sign up

Export Citation Format

Share Document