scholarly journals Towards Energy Efficient Scheduling of Manufacturing Systems through Collaboration between Cyber Physical Production and Energy Systems

Energies ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 4448 ◽  
Author(s):  
Maroua Nouiri ◽  
Damien Trentesaux ◽  
Abdelghani Bekrar
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Real Time ◽  
Energy Efficient ◽  
Product Life Cycle ◽  
Production Systems ◽  
Renewable Energy Sources ◽  
Energy Systems ◽  
Decision Tools ◽  
Energy Efficient Scheduling

Currently, enhancing sustainability, and in particular reducing energy consumption, is a huge challenge for manufacturing enterprises. The vision of the fourth industrial revolution (so-called “industry 4.0”) is not only to optimize production and minimize costs, but also to reduce energy consumption and enhance product life-cycle management. To address this challenge, a multi-agent architecture aimed at elaborating predictive and reactive energy-efficient scheduling through collaboration between cyber physical production and energy systems is proposed in this paper. Smart, sustainable decision tools for cyber physical production systems (CPPS) and cyber physical energy systems (CPES) are proposed. The decision tools are data-driven, agent-based models with dynamic interaction. The main aim of agent behaviours in the cyber part of CPPS is to find a predictive and reactive energy-efficient schedule. The role of agents in CPES is to control the energy consumption of connected factories and switch between the different renewable energy sources. Dynamic mechanisms in CPPS and CPES are proposed to adjust the energy consumption of production systems based on the availability of the renewable energy. The proposed approach was validated on a physically distributed architecture using networked embedded systems and real-time data sharing from connected sensors in each cyber physical systems. A series of instances inspired from the literature were tested to assess the performance of the proposed method. The results prove the efficiency of the proposed approach in adapting the energy consumption of connected factories based on a real-time energy threshold.

scholarly journals Energy-Efficient Buildings, a step towards Sustainability in Pakistan

2019 ◽  
Vol 4 (4) ◽  
pp. 109-124
Author(s):  
Hashir Usman
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Thermal Comfort ◽  
Energy Efficient ◽  
Energy State ◽  
Renewable Energy Sources ◽  
Building Energy ◽  
Developed Countries ◽  
Zero Energy ◽  
The World

With every passing year, energy consumption in the world is increasing drastically. Most of the energy comes from fossil fuels which are also depleting in a fast manner. Buildings consume a significant amount of energy all over the world and the demand for energy is also increasing unremittingly in buildings. Developed countries are taking profound measures in order to make buildings energy efficient and sustainable by achieving nearly zero energy stage. Pakistan is facing a serious energy crisis from the past few decades. The building sector in Pakistan deserves special attention in this regard since the energy consumption in buildings in Pakistan is feverishly high. Many types of research have been carried out in Pakistan by the United Nations and Energy Department of Pakistan in order to devise applicable methods that not only provide thermal comfort to the occupants but also make a building energy efficient. Renewable energy also plays an important role in compensating building energy demands. It is easy to achieve nearly zero energy state in a good energy efficient building if it is coupled with renewable energy sources then it will make it self-sufficient in energy demand. A survey is also carried out to determine the thermal comfort of the occupants in different types of areas. Also, solar energy analysis is also taken into account to highlight the solar power potential in Pakistan. Several recommendations have also been suggested to implement energy efficiency measures in Pakistan.

scholarly journals An Overview on Functional Integration of Hybrid Renewable Energy Systems in Multi-Energy Buildings

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1078
Author(s):  
Laura Canale ◽  
Anna Rita Di Fazio ◽  
Mario Russo ◽  
Andrea Frattolillo ◽  
Marco Dell’Isola
Keyword(s):  
Renewable Energy ◽  
Real Time ◽  
Energy Demand ◽  
Residential Buildings ◽  
Renewable Energy Sources ◽  
Functional Integration ◽  
Energy Systems ◽  
Renewable Energy Systems ◽  
Hybrid Renewable Energy Systems ◽  
Hybrid Renewable Energy

Buildings are responsible for over 30% of global final energy consumption and nearly 40% of total CO2 emissions. Thus, rapid penetration of renewable energy technologies (RETs) in this sector is required. Integration of renewable energy sources (RESs) into residential buildings should not only guarantee an overall neutral energy balance over long term horizon (nZEB concept), but also provide a higher flexibility, a real-time monitoring and a real time interaction with end-users (smart-building concept). Thus, increasing interest is being given to the concepts of Hybrid Renewable Energy Systems (HRES) and Multi-Energy Buildings, in which several renewable and nonrenewable energy systems, the energy networks and the energy demand optimally interact with each other at various levels, exploring all possible interactions between systems and vectors (electricity, heat, cooling, fuels, transport) without them being treated separately. In this context, the present paper gives an overview of functional integration of HRES in Multi-Energy Buildings evidencing the numerous problems and potentialities related to the application of HRESs in the residential building sector. Building-integrated HRESs with at least two RESs (i.e., wind–solar, solar–geothermal and solar–biomass) are considered. The most applied HRES solutions in the residential sector are presented, and integration of HRES with thermal and electrical loads in residential buildings connected to external multiple energy grids is investigated. Attention is focused on the potentialities that functional integration can offer in terms of flexibility services to the energy grids. New holistic approaches to the management problems and more complex architectures for the optimal control are described.

Energy-efficient scheduling algorithm for real-time job set

2016 ◽  
Vol 33 (6) ◽  
pp. 1753-1766 ◽  
Author(s):  
Chin-Fu Kuo ◽  
Yung-Feng Lu ◽  
Bao-Rong Chang
Keyword(s):  
Energy Consumption ◽  
Real Time ◽  
Energy Efficient ◽  
Scheduling Algorithm ◽  
Experimental Results ◽  
Total Density ◽  
Scheduling Problem ◽  
Two Phase ◽  
Content Type ◽  
Energy Efficient Scheduling

Purpose – The purpose of this paper is to investigate the scheduling problem of real-time jobs executing on a DVS processor. The jobs must complete their executions by their deadlines and the energy consumption also must be minimized. Design/methodology/approach – The two-phase energy-efficient scheduling algorithm is proposed to solve the scheduling problem for real-time jobs. In the off-line phase, the maximum instantaneous total density and instantaneous total density (ITD) are proposed to derive the speed of the processor for each time instance. The derived speeds are saved for run time. In the on-line phase, the authors set the processor speed according to the derived speeds and set a timer to expire at the corresponding end time instance of the used speed. Findings – When the DVS processor executes a job at a proper speed, the energy consumption of the system can be minimized. Research limitations/implications – This paper does not consider jobs with precedence constraints. It can be explored in the further work. Practical implications – The experimental results of the proposed schemes are presented to show the effectiveness. Originality/value – The experimental results show that the proposed scheduling algorithm, ITD, can achieve energy saving and make the processor fully utilized.

Hydrogen Production From Renewables: Marine and Hydrokinetic Energy Systems

2017 ◽  
Author(s):  
Gagee Raut ◽  
Navid Goudarzi
Keyword(s):  
Renewable Energy ◽  
Hydrogen Production ◽  
Energy Production ◽  
Production Systems ◽  
Renewable Energy Sources ◽  
Energy Systems ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Hydrokinetic Energy ◽  
Lower Variability

Hydrogen can be produced from various primary resources by using different processes. The full benefits of hydrogen production can be obtained when it is produced from renewable energy resources. Among these emerging renewable energy resources, marine and hydrokinetic (MHK) energy systems lower variability in the energy production. Also, more than 50% of the total US population resides near water bodies. In this paper, a brief review of renewable energy-based hydrogen production systems is provided, the emission level of both conventional and renewable energy sources for producing the same amount of hydrogen are compared using GREET model, and research needs for further MHK-based hydrogen production systems are discussed. The results showed the significant emission reductions obtained from renewable-based hydrogen production systems. Moreover, the study showed the potential of producing the same amount of hydrogen with less resource quantity of wave energy compared to that from other renewables such as solar energy.

scholarly journals Mitigating Climate Change Through Energy Efficient Practices in High Altitutes of Nepal

2017 ◽  
pp. 745-755
Author(s):  
Silu Bhochhibhoya ◽  
Ramesh Kumar Maskey ◽  
Sanjaya Nath Khanal
Keyword(s):  
Climate Change ◽  
Renewable Energy ◽  
Energy Consumption ◽  
Energy Efficient ◽  
Fossil Fuels ◽  
Negative Impact ◽  
Risk Mitigation ◽  
Renewable Energy Sources ◽  
Mitigation And Adaptation ◽  
The Impact

Climate change is a global scale crisis with drastic effects on higher altitudes. Ice melting and its corresponding impacts on mountain ecosystems are just some of the most directly visible signals of global warming. Increased rate of energy consumption, emissions along with ever growing tourist inflow in such areas has a high impact on this phenomenon. Particulate matter, Carbon Dioxide and Methane are some of the chief emissions in such areas with negative impact on the environment. Since burning of fossil fuels is one of the main root causes of cclimate change, its risk mitigation and adaptation depends greatly on energy conservation and the use of renewable energy technologies. Well insulated energy – efficient building construction method and the increased use of renewable energy sources could be the key solution. Reduction of dung-cakes and kerosene for space heating would decrease the greenhouse gas emissions as well as black carbons and particulate matters and improves the indoor living conditions. Energy efficient technologies including the building of traditional Sherpa houses could be the best practice to reduce the impact of climate change in high altitudes. This paper is primarily concerned with testing the thermal properties of insulating tiles made of locally available materials as well as to establish a correlation between energy consumption patterns in different building types with respective CO2 emissions.Subsequently, the positive attributes of such energy conserving design in relation to climate change adaptation is ascertained.

scholarly journals Improving the Efficiency of Heat Power Generation from Household Drains

2019 ◽  
Vol 62 (5) ◽  
pp. 482-498 ◽  
Author(s):  
S. N. Osipov ◽  
A. V. Zakharenko
Keyword(s):  
Waste Water ◽  
Renewable Energy ◽  
Energy Consumption ◽  
Heat Exchanger ◽  
Energy Efficient ◽  
Cold Water ◽  
Residential Buildings ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Secondary Energy

Minimization of consumption by the buildings during exploitation of energy resources produced of non-renewable energy sources is the main objective of modern energy efficient construction. Currently, there are two principal solutions to this issue: the use of renewable energy sources (such as solar energy, geothermal energy, etc.) and optimization of secondary energy consumption. The paper considers one of the main approaches of secondary energy consumption, which is advisable to use in residential buildings, viz. the use of heat of household drains. Taking into account the fact that in modern energy-efficient buildings a significant amount of energy is still spent on hot water supply, one of the options for optimizing this process is the reuse of waste water heat as the initial source of heating of cold water supplied to the building. The design and technological solution of the heat exchanger, which will make the most efficient use of waste water heat for heating cold tap water possible, is proposed. A characteristic feature of the heat exchanger is the providing a screw movement of waste water along the internal standpipe. At the same time, cold water moves evenly along its outer contour, gradually being heated up from household drains. The key problem of the considered design solution is the correct choice of the appropriate slope of the screw surface, which will ensure the maximum transfer of heat to cold water and at the same time provide a quality drain, eliminating the possibility of clogging and stagnation of small particles. In order to solve this problem an assessment of the existing theoretical and practical approaches to the provision of water flow in technological pipelines which allows determining the optimal value of the slope of the surface has been fulfilled.

Renewable Energy Systems Integration for Efficiency Improvement of a CHP Unit

2017 ◽  
Author(s):  
M. A. Ancona ◽  
L. Branchini ◽  
A. De Pascale ◽  
F. Melino ◽  
B. Di Pietra
Keyword(s):  
Renewable Energy ◽  
Fuel Consumption ◽  
Energy Production ◽  
Production Systems ◽  
Renewable Energy Sources ◽  
Electric Energy ◽  
District Heating ◽  
Energy Systems ◽  
Production Plant ◽  
Energy Grid

In the next years energy grids are expected to become increasingly complex, due to the integration between traditional generators (operating with fossil fuels, especially natural gas), renewable energy production systems and storage devices. Furthermore, the increase of installed distributed generation systems is posing new issues for the existing grids. The integration involves both electric grids and thermal networks, such as district heating networks. In this scenario, it is fundamental to optimize the production mix and the operation of each system, in order to maximize the renewable energies exploitation, minimize the economic costs (in particular the fossil fuel consumption) and the environmental impact. The aim of this paper is the analysis of different solutions in terms of energy generation mix, in order to define the optimal configuration for a given network. With this purpose, in this study a real district heating network served by a combined heat and power unit and four boilers has been considered. The current mode of operation of the selected network has been simulated, in order to individuate eventual criticism and/or improvement possibility. On the basis of the obtained results, several scenarios have been developed by considering the addition of thermal or electric energy production systems from renewable energy sources and/or heat pumps. For a given scenario, a whole year of operation has been simulated with an in-house developed software, called EGO (Energy Grid Optimizer), based on genetic algorithms and able to define the load distribution of a number of energy systems operating into an energy grid, with the aim to minimize the total cost of the energy production. Further considered constraints have been the avoiding of thermal dissipations and the minimization of the electric energy sale to the national grid (in order to increase the grid stability). The carried out analysis has allowed to evaluate the yearly fuel consumption, the yearly electric energy sold to the network and the yearly electric energy purchased from the network, for each of the developed configurations. In this study the obtained results have been discussed in order to compare the proposed scenarios and to define an optimal solution, which enables to reduce the yearly operation costs of the production plant.

scholarly journals Empirical Research on the Relationship amongst Renewable Energy Consumption, Economic Growth and Foreign Direct Investment in Kazakhstan and Uzbekistan

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 332
Author(s):  
Janusz Grabara ◽  
Arsen Tleppayev ◽  
Malika Dabylova ◽  
Leonardus W. W. Mihardjo ◽  
Zdzisława Dacko-Pikiewicz
Keyword(s):  
Economic Growth ◽  
Foreign Direct Investment ◽  
Renewable Energy ◽  
Energy Consumption ◽  
Direct Investment ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Renewable Energy Consumption ◽  
Integration Test ◽  
The Relationship

In this contemporary era, environmental problems spread at different levels in all countries of the world. Economic growth does not just depend on prioritizing the environment or improving the environmental situation. If the foreign direct investment is directed to the polluting industries, they will increase pollution and damage the environment. The purpose of the study is to consider the relationship between foreign direct investment in Kazakhstan and Uzbekistan and economic growth and renewable energy consumption. The study is based on data obtained from 1992 to 2018. The results show that there is a two-way link between foreign direct investment and renewable energy consumption in the considered two countries. The Granger causality test approach is applied to explore the causal relationship between the variables. The Johansen co-integration test approach is also employed to test for a relationship. The empirical results verify the existence of co-integration between the series. The main factors influencing renewable energy are economic growth and electricity consumption. To reduce dependence on fuel-based energy sources, Kazakhstan and Uzbekistan need to attract energy to renewable energy sources and implement energy efficiency based on rapid progress. This is because renewable energy sources play the role of an engine that stimulates the production process in the economy for all countries.

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