scholarly journals Potential of waste heat in Croatian industrial sector

2012 ◽  
Vol 16 (3) ◽  
pp. 747-758 ◽  
Author(s):  
Davor Biscan ◽  
Veljko Filipan
Keyword(s):  
Energy Efficiency ◽  
Fossil Fuels ◽  
Waste Heat ◽  
Operation Mode ◽  
Industrial Sector ◽  
Main Process ◽  
The European Union ◽  
National Goal ◽  
Industrial Sectors ◽  
Heat Potential

Waste heat recovery in Croatian industry is of the highest significance regarding the national efforts towards energy efficiency improvements and climate protection. By recuperation of heat which would otherwise be wasted, the quantity of fossil fuels used for production of useful energy could be lowered thereby reducing the fuel costs and increasing the competitiveness of examined Croatian industries. Another effect of increased energy efficiency of industrial processes and plants is reduction of greenhouse gases i.e. the second important national goal required by the European Union (EU) and United Nations Framework Convention on Climate Change (UNFCCC). Paper investigates and analyses the waste heat potential in Croatian industrial sector. Firstly, relevant industrial sectors with significant amount of waste heat are determined. Furthermore, significant companies in these sectors are selected with respect to main process characteristics, operation mode and estimated waste heat potential. Data collection of waste heat parameters (temperature, mass flow and composition) is conducted. Current technologies used for waste heat utilization from different waste heat sources are pointed out. Considered facilities are compared with regard to amount of flue gas heat. Mechanisms for more efficient and more economic utilization of waste heat are proposed.

scholarly journals Environmental Payback of Renovation Strategies in a Northern Climate—the Impact of Nuclear Power and Fossil Fuels in the Electricity Supply

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 80 ◽  
Author(s):  
Ricardo Ramírez-Villegas ◽  
Ola Eriksson ◽  
Thomas Olofsson
Keyword(s):  
European Union ◽  
Energy Efficiency ◽  
Global Warming ◽  
Life Cycle ◽  
Radioactive Waste ◽  
Global Warming Potential ◽  
Nuclear Power ◽  
Fossil Fuels ◽  
The European Union ◽  
The Impact

The aim of this study is to assess how the use of fossil and nuclear power in different renovation scenarios affects the environmental impacts of a multi-family dwelling in Sweden, and how changes in the electricity production with different energy carriers affect the environmental impact. In line with the Paris Agreement, the European Union has set an agenda to reduce greenhouse gas emissions by means of energy efficiency in buildings. It is estimated that by the year 2050, 80% of Europe’s population will be living in buildings that already exist. This means it is important for the European Union to renovate buildings to improve energy efficiency. In this study, eight renovation scenarios, using six different Northern European electricity mixes, were analyzed using the standard of the European Committee for Standardization for life cycle assessment of buildings. This study covers all life cycle steps from cradle to grave. The renovation scenarios include combinations of photovoltaics, geothermal heat pumps, heat recovery ventilation, and improvement of the building envelope. The results show that while in some electricity mixes a reduction in the global warming potential can be achieved, it can be at the expense of an increase in radioactive waste production, and, in mixes with a high share of fossil fuels, the global warming potential of the scenarios increases with time, compared with that of the original building. It also shows that in most electricity mixes, scenarios that reduce the active heat demand of the building end up in reducing both the global warming potential and radioactive waste, making them less sensitive to changes in the energy system.

scholarly journals Potential and Impacts of Cogeneration in Tropical Climate Countries: Ecuador as a Case Study

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5254
Author(s):  
Manuel Raul Pelaez-Samaniego ◽  
Juan L. Espinoza ◽  
José Jara-Alvear ◽  
Pablo Arias-Reyes ◽  
Fernando Maldonado-Arias ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Fossil Fuels ◽  
Energy Use ◽  
National Level ◽  
Ghg Emissions ◽  
Industrial Sector ◽  
Increase Energy Efficiency ◽  
High Dependency ◽  
Generation Capacity ◽  
Tropical Climates

High dependency on fossil fuels, low energy efficiency, poor diversification of energy sources, and a low rate of access to electricity are challenges that need to be solved in many developing countries to make their energy systems more sustainable. Cogeneration has been identified as a key strategy for increasing energy generation capacity, reducing greenhouse gas (GHG) emissions, and improving energy efficiency in industry, one of the most energy-demanding sectors worldwide. However, more studies are necessary to define approaches for implementing cogeneration, particularly in countries with tropical climates (such as Ecuador). In Ecuador, the National Plan of Energy Efficiency includes cogeneration as one of the four routes for making energy use more sustainable in the industrial sector. The objective of this paper is two-fold: (1) to identify the potential of cogeneration in the Ecuadorian industry, and (2) to show the positive impacts of cogeneration on power generation capacity, GHG emissions reduction, energy efficiency, and the economy of the country. The study uses methodologies from works in specific types of industrial processes and puts them together to evaluate the potential and analyze the impacts of cogeneration at national level. The potential of cogeneration in Ecuador is ~600 MWel, which is 12% of Ecuador’s electricity generation capacity. This potential could save ~18.6 × 106 L/month of oil-derived fuels, avoiding up to 576,800 tCO2/year, and creating around 2600 direct jobs. Cogeneration could increase energy efficiency in the Ecuadorian industry by up to 40%.

scholarly journals Targeting heat recovery and reuse in industrial zone

2017 ◽  
Vol 23 (1) ◽  
pp. 73-82
Author(s):  
Milana Zaric ◽  
Mirko Stijepovic ◽  
Patrick Linke ◽  
Jasna Stajic-Trosic ◽  
Branko Bugarski ◽  
...  
Keyword(s):  
Heat Recovery ◽  
Fossil Fuels ◽  
Waste Heat ◽  
Minimum Energy ◽  
Heat Integration ◽  
Energy Integration ◽  
Industrial Zone ◽  
Decentralized System ◽  
Industrial Sectors ◽  
Utility System

In order to reduce the usage of fossil fuels in industrial sectors by meeting the requirements of production processes, new heat integration and heat recovery approaches are developed. The goal of this study is to develop an approach to increase energy efficiency of an industrial zone by recovering and reusing waste heat via indirect heat integration. Industrial zones usually consist of multiple independent plants, where each plant is supplied by an independent utility system, as a decentralized system. In this study, a new approach is developed to target minimum energy requirements where an industrial zone would be supplied by a centralized utility system instead of decentralized utility system. The approach assumes that all process plants in an industrial zone are linked through the central utility system. This method is formulated as a linear programming problem (LP). Moreover, the proposed method may be used for decision making related to energy integration strategy of an industrial zone. In addition, the proposed method was applied on a case study. The results revealed that saving of fossil fuel could be achieved.

scholarly journals Validation of An Instrument to Know the Use of Smart Devices in Air Conditioners and Their Improvement in Energy Efficiency: Case Study in Ecuador

2021 ◽  
Vol 17 (04) ◽  
pp. 133
Author(s):  
Jorge Israel Anchundia-Santana ◽  
Julieta Evangelina Sánchez-Cano ◽  
Washington Garcia-Quilachamin ◽  
Evelyn Isabel Santana-Mantuano
Keyword(s):  
Energy Efficiency ◽  
Air Conditioning ◽  
Fossil Fuels ◽  
Online Survey ◽  
Smart Devices ◽  
Air Conditioners ◽  
Industrial Sectors ◽  
The Republic ◽  
Air Conditioning Systems

The constant growth of the world’s population has generated various changes in the use of the diversity of the resources provided to us by the planet. Considering that by properly managing energy in air conditioning systems correctly, it collaborates in the fight against climate change, reducing the excessive use of fossil fuels and, therefore, the emission of CO2 and other greenhouse gases, creating an environment of comfort in industrial sectors, businesses, companies, homes, among others. The objective of this research is to validate the instrument considering the information obtained about smart devices applied in air conditioning systems and their improvement in energy efficiency. The methodology applied consisted of a field study conducted through an online survey that was directed at 226 students and professionals from three provinces of the Republic of Ecuador. To validate the data obtained in the instrument, the exploratory factor analysis was performed also of the principal components in the last phase it was obtained in factor transformation matrix (0.986), which demonstrates the validity of the study. To apply the KMO test and Bartlett’s sphericity, the following ranges (≥0.6) y (<0.05) were considered respectively.

POTENTIAL WASTE HEAT RECOVERY ANALYSIS FROM MOLTEN STEEL SLAG: THE CASE STUDY OF SIDENOR STEELWORKS IN BASAURI (SPAIN)

2021 ◽  
pp. 1-18
Author(s):  
Iñigo Ortega-Fernandez ◽  
Peru Arribalzaga ◽  
Daniel Bielsa ◽  
Leixuri Fernández ◽  
Iñigo Unamuno
Keyword(s):  
Heat Recovery ◽  
Molten Slag ◽  
Waste Heat ◽  
Steel Slag ◽  
Industrial Sector ◽  
Maximum Energy ◽  
Piping System ◽  
Main Process ◽  
Technical Solution ◽  
Recovery Potential

Abstract Every day huge amount of energy is released to the atmosphere in form of waste heat. The search of a cleaner and more efficient society, not only at industrial level but also at domestic level, should avoid this type of emissions. Steelmaking is an example of an industrial sector with high optimization potential in energy management. In this line, this work presents the main outcomes of the investigation carried out in the search of a technical solution for heat capture and reutilization from one of the main waste heat streams in the steelworks, the molten slag. For this purpose, a piping system embedded in the slag pit soil is proposed as satisfactory solution for the heat capture operation. Besides, the internal applicability of this recovered heat is also addressed. Overall, the analysis carried out allows the identification of the main process parameters that limit the heat recovery potential from the molten slag. At the same time, the investigation provides accurate results of the maximum energy that can be recovered from the slag if the proposed technology is implemented (around 306 kWht per casting, what represents the 6.3% of the total available energy). The work is completed with a preliminary techno-economic analysis to conclude with the viability assessment. This analysis shows a depreciated payback period of the proposed technology below 7 years.

scholarly journals Estimating the waste heat recovery in the European Union Industry

2019 ◽  
Vol 4 (5) ◽  
pp. 211-221 ◽  
Author(s):  
Giuseppe Bianchi ◽  
Gregoris P. Panayiotou ◽  
Lazaros Aresti ◽  
Soteris A. Kalogirou ◽  
Georgios A. Florides ◽  
...  
Keyword(s):  
European Union ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Primary Energy ◽  
The European Union ◽  
Industrial Sectors ◽  
Energy Flows ◽  
Energy Consumptions ◽  
Temperature Levels

Abstract Industrial processes are currently responsible for nearly 26% of European primary energy consumptions and are characterized by a multitude of energy losses. Among them, the ones that occur as heat streams rejected to the environment in the form of exhausts or effluents take place at different temperature levels. The reduction or recovery of such types of energy flows will undoubtedly contribute to the achievement of improved environmental performance as well as to reduce the overall manufacturing costs of goods. In this scenario, the current work aims at outlining the prospects of potential for industrial waste heat recovery in the European Union (EU) upon identification and quantification of primary energy consumptions among the major industrial sectors and their related waste streams and temperature levels. The paper introduces a new approach toward estimating the waste heat recovery in the European Union industry, using the Carnot efficiency in relation to the temperature levels of the processes involved. The assessment is carried out using EU statistical energy databases. The overall EU thermal energy waste is quantified at 920 TWh theoretical potential and 279 TWh Carnot potential.

scholarly journals Significance of energy efficiency for energy security

2018 ◽  
Vol 28 (4) ◽  
pp. 46-52
Author(s):  
L. Jovanović ◽  
V. Radović ◽  
M. Lukinović
Keyword(s):  
European Union ◽  
Energy Efficiency ◽  
Energy Security ◽  
Fossil Fuels ◽  
The European Union ◽  
Continuous Increase ◽  
Term Energy ◽  
Supply Capacity ◽  
Gas Supply

Energy security of the European Union is one of the most important parameters that determine the present and the future on the world's geopolitical scene. EU countries are characterized by: insufficient fossil fuels from their own sources, continuous increase in consumption and strict environmental regulations (which limit the use of coal and oil). From all of the above, it follows that the long-term energy security of the European Union can be ensured by increase of gas supply capacity and diversification of sources of supply. The main objective of the paper is to analyze the situation and perspective of optimizing energy efficiency in the countries of the European Union through the application of resource of energy saving and new and innovative technologies of renewable resources.

scholarly journals Opportunities and Threats of Implementing Drain Water Heat Recovery Units in Poland

Resources ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 88 ◽  
Author(s):  
Sabina Kordana ◽  
Kamil Pochwat ◽  
Daniel Słyś ◽  
Mariusz Starzec
Keyword(s):  
Heat Recovery ◽  
Fossil Fuels ◽  
Waste Heat ◽  
Renewable Energy Sources ◽  
Dynamics Modeling ◽  
Drain Water ◽  
Software Environment ◽  
Modeling Tools ◽  
Factors Affecting ◽  
Heat Potential

In recent years an increase of interest in usage of renewable energy sources as a substitution of fossil fuels is being noticeable. However, the waste heat potential, which can be used as an additional source of energy for heating water in buildings, is being omitted. The sources of this heat can be grey water discharged from such sanitary facilities as showers or washing machines. In response to this issue, we took on the task to define and analyze key factors affecting the development of DWHR (Drain Water Heat Recovery) systems using PESTLE (political, economic, social, technological, legal and environmental) analysis. The strengths and weaknesses of these systems were also identified. The studies were based on CFD (computational fluid dynamics) modeling tools. In the Autodesk Simulation CFD software environment, a DWHR unit was made, which was then analyzed for heat exchange efficiency. The obtained results were the basis for preparing the strategy for the development of Drain Water Heat Recovery systems. It was made using the SWOT/TOWS (strengths, weaknesses, opportunities and threats/threats, opportunities, weaknesses and strengths) method, which precisely orders information and allows presenting the project characteristic in readable way for a recipient. The results of the conducted analysis indicated the lack of acceptance on the part of potential users and the resulting need to promote the use of Drain Water Heat Recovery systems at residential level.

CHP for Buildings: The Challenge of Delivering Value to the Commercial Sector

2002 ◽  
Author(s):  
M. Cowie ◽  
A. Marantan ◽  
P. W. Garland ◽  
R. Rademacher
Keyword(s):  
Waste Heat ◽  
Geographic Location ◽  
Cost Savings ◽  
Industrial Sector ◽  
Hot Water ◽  
Commercial Sector ◽  
Commercial Building ◽  
Peak Shaving ◽  
Industrial Sectors ◽  
Environmental Savings

The commercial sector has historically not seen the same level of investment in Combined Cooling, Heating and Power (CHP) as the industrial sector. The average commercial building has smaller and more diverse energy requirements than would be expected at a typical industrial site. Consequently, even though the electrical requirements of the commercial and industrial sectors are very similar there is nine times more installed industrial CHP capacity than commercial CHP in the U.S. However, the advent of microturbines and increasing commercial viability of fuel cells promises generator sizes much more suitable for use in the commercial sector. There are many possible uses for the waste heat in a commercial building, depending upon geographic location, occupant requirements and the energy cost structures of both fuel and grid electricity. Possible waste heat technologies include absorption chillers, humidifiers, desiccant dehumidifiers, steam generators, hot water heating, space heating and thermal storage. Several of these could be combined with a generator to produce a commercial CHP for Buildings package. A well-designed and operated package should deliver energy and environmental savings as well as significant cost savings to the customer. Other potential value streams are improved indoor air quality, peak shaving to reduce demand charges, enhanced power reliability, tradable environmental credits or grid independence. This presentation is a broad discussion of the challenges that CHP faces when competing in the commercial sector and the technologies and strategies that will help overcome them.

Potential Waste Heat Recovery Analysis From Molten Steel Slag: The Case Study of Sidenor Steelworks in Basauri (Spain)

2020 ◽  
Author(s):  
Iñigo Ortega-Fernández ◽  
Peru Arribalzaga ◽  
Daniel Bielsa ◽  
Leixuri Fernández ◽  
Iñigo Unamuno
Keyword(s):  
Heat Recovery ◽  
Molten Slag ◽  
Waste Heat ◽  
Steel Slag ◽  
Industrial Sector ◽  
Maximum Energy ◽  
Piping System ◽  
Main Process ◽  
Technical Solution ◽  
Recovery Potential

Abstract Every day huge amount of energy is released to the atmosphere in form of waste heat. The search of a cleaner and more efficient society, not only at industrial level but also at domestic level, should avoid this type of emissions. Steelmaking is an example of an industrial sector with high optimization potential in energy management. In this line, this work presents the main outcomes of the investigation carried out in the search of a technical solution for heat capture and reutilization from one of the main waste heat streams in the steelworks, the molten slag. For this purpose, a piping system embedded in the slag pit soil is proposed as satisfactory solution for the heat capture operation. Besides, the internal applicability of this recovered heat is also addressed. Overall, the analysis carried out allows the identification of the main process parameters that limit the heat recovery potential from the molten slag. At the same time, the investigation provides accurate results of the maximum energy that can be recovered from the slag if the proposed technology is implemented (around 306 kWht per casting, what represents the 6.3% of the total available energy). The work is completed with a preliminary techno-economic analysis to conclude with the viability assessment. This analysis shows a depreciated payback period of the proposed technology below 7 years.

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