scholarly journals Analysis of renewable energy sources and a heat storage tank application in a district heating substation

2021 ◽  
Vol 323 ◽  
pp. 00006
Author(s):  
Kamil Chłosta ◽  
Wiesław Zima
Keyword(s):  
Renewable Energy ◽  
Storage Tank ◽  
Heat Storage ◽  
Renewable Energy Sources ◽  
District Heating ◽  
Operating Conditions ◽  
Energy Sources ◽  
Heat Sources ◽  
Water Parameters ◽  
Air Source Heat Pump

The study verifies the potential application of renewable energy sources in a district heating substation. Different operating configurations of heat sources have been analysed, including solar collectors, PV panels and air source heat pump. Concepts of regulating the water parameters in a substation have been analysed. Moreover, the potential impact of a heat storage tank application has been calculated using a genetic algorithm to find optimal operating conditions in a district heating substation. The analysis is based on measured yearly data.

scholarly journals Smart Asset Management for District Heating Systems in the Baltic Sea Region

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 314
Author(s):  
Anna Grzegórska ◽  
Piotr Rybarczyk ◽  
Valdas Lukoševičius ◽  
Joanna Sobczak ◽  
Andrzej Rogala
Keyword(s):  
Renewable Energy ◽  
Baltic Sea ◽  
Asset Management ◽  
Renewable Energy Sources ◽  
District Heating ◽  
Operating Conditions ◽  
Energy Sources ◽  
The Baltic Sea ◽  
Baltic Sea Region ◽  
The Baltic

The purpose of this review is to provide insight and a comparison of the current status of district heating (DH) systems for selected Baltic Sea countries (Denmark, Germany, Finland, Latvia, Lithuania, Poland, and Sweden), especially from viewpoints of application and solutions of novel smart asset management (SAM) approaches. Furthermore, this paper considers European projects ongoing from 2016, involving participants from the Baltic Sea Region, concerning various aspects of DH systems. The review presents the energy sources with particular attention to renewable energy sources (RES), district heating generations, and the exploitation problems of DH systems. The essential point is a comparison of traditional maintenance systems versus SAM solutions for optimal design, operating conditions, and controlling of the DH networks. The main conclusions regarding DH systems in Baltic Sea countries are commitment towards a transition to 4th generation DH, raising the quality and efficiency of heat supply systems, and simultaneously minimizing the costs. The overall trends show that applied technologies aim to increase the share of renewable energy sources and reduce greenhouse gas emissions. Furthermore, examples presented in this review underline the importance of the implementation of a smart asset management concept to modern DH systems.

scholarly journals A Review of the Use of Artificial Neural Network Models for Energy and Reliability Prediction. A Study of the Solar PV, Hydraulic and Wind Energy Sources

2019 ◽  
Vol 9 (9) ◽  
pp. 1844 ◽  
Author(s):  
Jesús Ferrero Bermejo ◽  
Juan F. Gómez Fernández ◽  
Fernando Olivencia Polo ◽  
Adolfo Crespo Márquez
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Renewable Energy ◽  
Energy Production ◽  
Renewable Energy Sources ◽  
Operating Conditions ◽  
Energy Sources ◽  
Solar Pv ◽  
Ann Models ◽  
Artificial Neural

The generation of energy from renewable sources is subjected to very dynamic changes in environmental parameters and asset operating conditions. This is a very relevant issue to be considered when developing reliability studies, modeling asset degradation and projecting renewable energy production. To that end, Artificial Neural Network (ANN) models have proven to be a very interesting tool, and there are many relevant and interesting contributions using ANN models, with different purposes, but somehow related to real-time estimation of asset reliability and energy generation. This document provides a precise review of the literature related to the use of ANN when predicting behaviors in energy production for the referred renewable energy sources. Special attention is paid to describe the scope of the different case studies, the specific approaches that were used over time, and the main variables that were considered. Among all contributions, this paper highlights those incorporating intelligence to anticipate reliability problems and to develop ad-hoc advanced maintenance policies. The purpose is to offer the readers an overall picture per energy source, estimating the significance that this tool has achieved over the last years, and identifying the potential of these techniques for future dependability analysis.

Multilevel policies for radical transition: Governance for a 100% renewable energy system

2017 ◽  
Vol 35 (7) ◽  
pp. 1218-1241 ◽  
Author(s):  
Frede Hvelplund ◽  
Søren Djørup
Keyword(s):  
Renewable Energy ◽  
Central Government ◽  
Renewable Energy Sources ◽  
District Heating ◽  
Transition Process ◽  
Energy System ◽  
Energy Sources ◽  
Energy Supply System ◽  
Specific Analysis ◽  
Geographically Distributed

Transition from the stored energy of fossil fuel-based systems to fluctuating renewable energy sources requires a fundamental change in both the energy supply system and governance arrangements. According to analyses made using the Aalborg University Energy PLAN model, the infrastructure required to handle fluctuating energy – such as goals for further expanding the exploitation of wind power towards 50% of energy consumption – necessitates the integration of power, district heating, transportation and biomass production, which should be geographically distributed. To enhance our understanding of this paradigmatic technological change, this article presents both a general analysis of the regulatory consequences and a specific analysis of the immediate challenges involved in the transition process, framed within the Danish context. The general conclusion is that the required distributed, local and regional technological energy system needs a bottom up and interactive regulatory framework, where the central government should have a more reflexive and communicative role, providing services and national coordination for an energy system that contains a large share of fluctuating renewable energy sources. A specific conclusion is that the present Danish tariff principles and energy tax system should be fundamentally altered in order to better facilitate the coordination of the heat and electricity sectors, to incentivise the creation of the necessary integration infrastructure.

scholarly journals Thermo-economic and environmental analysis of integrating renewable energy sources in a district heating and cooling network

2019 ◽  
Vol 13 (1) ◽  
pp. 79-100 ◽  
Author(s):  
Muhammad Asim ◽  
Saad Saleem ◽  
Muhammad Imran ◽  
Michael K. H. Leung ◽  
Syed Asad Hussain ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Environmental Analysis ◽  
Renewable Energy Sources ◽  
District Heating ◽  
Energy Sources ◽  
Heating And Cooling

District Heating Network Modelling for the Analysis of Low-Exergy Sources

2017 ◽  
Author(s):  
Vittorio Verda ◽  
Elisa Guelpa
Keyword(s):  
Power Plants ◽  
Waste Heat ◽  
Fluid Dynamic ◽  
Renewable Energy Sources ◽  
Variable Mass ◽  
District Heating ◽  
Conservation Equation ◽  
Operating Conditions ◽  
Heat Sources ◽  
District Heating System

One of the main advantages of district heating system technology is the possibility of integrating multiple heat sources for domestic heating. In particular, it is often possible exploit low-exergy sources, such as waste heat recovered from industry or from renewable energy sources, that are often affected by time variation of the temperature. A very convenient and useful opportunity for predicting and analyzing district heating network behavior is modelling. Modelling allows to quantify opportunities related to changes in DH (district heating) network design or management, before real implementation. Therefore an important point is the creation of models able to simulate network, also very large and linked to many power plants, working at variable heat production conditions (i.e. variable mass flow rates and temperatures). The goal of this work is to propose a novel approach which combines exergy analysis with a DH network model for evaluating the best DH operating conditions. A thermo-fluid dynamic model based on conservation equation has been adapted for the discussed aims and applied to a network involving different low-exergy heat sources with variable temperatures. An evaluation of the implementation of these sources is provided for the Turin district heating network, which is the largest network in Italy.

The Concept of Mechanical Part of the Model Micro-Energy Sources for Electrical Laboratories

2016 ◽  
Vol 835 ◽  
pp. 810-815 ◽  
Author(s):  
René Drtina ◽  
Jaroslav Lokvenc ◽  
Josef Šedivý ◽  
Jan Škoda
Keyword(s):  
Renewable Energy ◽  
Alternative Energy ◽  
Electrical Engineering ◽  
Renewable Energy Sources ◽  
Operating Conditions ◽  
Energy Sources ◽  
Operating Modes ◽  
Alternative Energy Sources ◽  
Asynchronous Generator ◽  
The Subject

The use of renewable (alternative) energy sources of energy is still a hot topic. In the electrical engineering laboratories of the Department of technical subjects created a model of micro energy sources that can be operated in various operating modes to simulate in various operating conditions. The machine set is dedicated for laboratory of electric engeneering. Goal is to show students in the subject Renewable energy sources and their application, practical use and parameters an the asynchronous generator. The article deals with the mechanical concept and mechanical construction of laboratory machine set.

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