Petar Sabev Varbanov

Petar Sabev Varbanov
Brno University of Technology · SPIL Laboratory, NETME Centre, Faculty of Mechanical Engineering

Dr Habil / PhD

About

332
Publications
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6,195
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Publications

Publications (332)
Article
The worldwide plastic waste accumulation has posed probably irreversible harm to the environment, and the main dilemma for this global issue is: How to define the waste quality grading system to maximise plastic recyclability? This work reports a machine learning approach to evaluating the recyclability of plastic waste by categorising the quality...
Article
This paper presents a method for heat exchanger network (HEN) optimisation considering plate heat exchangers (PHEs), incorporating detailed PHEs design. The developed method starts from a mathematical model based on the Advanced Grid Diagram, which can optimise the HEN structure. The model minimises the energy consumption cost with the constraints...
Article
This work provides an overview of recent graphical approaches which can provide beneficial support for various applications enhancing cleaner production and, consequently, sustainability. Graphical tools, mostly based on a physical inside, play an important role in the decision-making process in engineering and can also be in cleaner production and...
Article
The proper handling of Municipal Solid Waste (MSW) is critical due to its high generation rate and the potential to minimise environmental impacts by simultaneously reducing resource depletion and pollution. MSW utilisation for recycling is important for transforming the linear economy model into a circular one. The current review analyses and cate...
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It has been increasingly crucial for China to identify the critical regional transmission of embodied energy and the key sectors it flows, especially aiming toward the carbon neutrality target. However, there are still very limited works that have focused on a similar topic. This study took 31 of the 34 provinces of China as cases, covered all econ...
Article
This paper presents a model for municipal power planning, incorporating renewable power generation sources and energy storage facilities. It proposes a prototyping model architecture including photovoltaic panels, wind turbines and battery power storage, linked to the municipal power demands and interacting with the power grid. The planning model m...
Article
For the manufacturing industry under the industry 4.0 environment, low carbon emissions and environmental protection have been a pain point of the industry development due to more and more production accidents caused by environmental issues. However, there is a paucity of systematic evaluation systems considering greener production performance for...
Article
Heat Integration (HI) with heat exchangers requires intimate knowledge and intensive calculation to set energy-saving targets to achieve the goal of efficient energy utilisation. The Shell and Tube Heat Exchanger (STHX) Design Software Module developed by the SPIL team, or SPIL-HX package, offers features that support engineers to design and rate o...
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Circular economy implementations tend to decrease the human pressure on the environment, but not all produce footprint reductions. That observation brings the need for tools for the evaluation of recycling processes. Based on the Exergy Footprint concept, the presented work formulates a procedure for its application to industrial chemical recycling...
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One of the ways of simultaneously minimising the use of fresh resources and pollution reduction are the industrial and urban symbiosis, implementing Circular Economy. The resource consumption and release of emissions can be considered as stemming from several domains-product use, production and delivery, resource supply, waste processing and reuse....
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Czech-Chinese Project Transmission Enhancement and Energy Optimised Integration of Heat Exchangers in Petrochemical Industry Waste Heat Utilisation is a joint project of Czech Republic, SPIL, Brno University of Technology-VUT Brno and the People's Republic of China, Xi'an Jiaotong University, Xi'an, Shaanxi. The 3 y project contributes to solving t...
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A green and sustainable process is proposed for the synthesis of metal nanoparticles (NPs) by means of a solid disaggregation in a liquid phase. A solid metal substrate, embedded in a solution containing suitable capping agents and surfactants, undergoes comminution carried out by a rotating shaft of hardness greater than the one typical of the ero...
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This paper provides a literature review of the impact of the COVID-19 spread-prevention measures on the water sectors, including general water network management, water quality and quantity, and wastewater treatment. Fifty-four papers are selected for the analytical review, and the results showed that the pandemic poses both positive and potential...
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This article explores an environmentally friendly method of complex processing of printed circuit boards of cell phones in order to extract gold and other valuable components without cyanides. Thiourea was used as reagents for leaching gold and silver. A nitric acid-based solder solvent was used to separate the electronic components and gold platin...
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This work aims to propose a general data-driven plastic waste categorisation procedure that defines their recyclability based on classification into material recycling classes. The contamination in plastics, such as metal fillers or additives, is accumulated during the entire Life Cycle, which can be harmful to either mechanical or chemical recycli...
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This work presents the analysis of Siberian Federal District regions major social-ecological-economic statistics based on research of the indicators of the Goal 7 "Ensuring Environmental Sustainability" of UN Millennium Development Goals (MDG). The results are analysed and discussed. Goal 7 contains three objectives and eight indicators. Energy int...
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The article proposes an environmentally friendly method for processing industrial waste by the example of slags from the Balkhash copper smelting plant (Kazakhstan). The first stage involved copper extraction. The second stage is gold recovery. For a more complete extraction of copper, microwave activation was used at various stages of the process....
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Plastics recycling, as a subclass of material recovery and recycling, features extensive and intensive properties. The intensive properties can be used to define a recyclability criterion and to classify the plastic materials for a symbiotic system (industrial, municipal and commercial) into recyclability categories, where the materials with higher...
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The increase of pollutants generated in the production of dairy products, the increase of the production costs and emerging social problems requires the development of approaches for resilience improvement of the considered product productions. An effective way to achieve this is by optimising all activities across the supply chain: from milk suppl...
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The article provides the outcomes of field experiments related to studying influence of plant growth stimulant "Fullerenol" (foliar application) when soybeans are cultivated under conditions of piedmont zone of East Kazakhstan on agricultural lands. The obtained results of soybeans foliar application by fullerene derivatives С60 enabled to identify...
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This paper reviews the Process Integration (PI) development related to the recent Conferences on Process Integration for Energy Saving and Pollution Reduction (PRES conferences) and makes suggestions for the future growth of PI branching out in the future. The conference history is now close to a quarter of the century-from 1998 to 2021, and has be...
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In this study, for remote recognition of crops of agroecosystems in Kazakhstan by methods of comparative and historical analogy with the active use of mathematical modelling, the yield indicator of agricultural crops was determined, their dynamic characteristics were studied to predict productivity. The parameters of the dynamic-statistical biomass...
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This article uses methods for predicting plant performance indicators in Kazakhstan. In the work, using deep learning, visualization of predicted indicators (indicators and others), statistics from predicted values and identified changes, time series have been developed. Sentinel satellite data and statistical indicators for the last few years for...
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descriptionIn this article, using the example of soybean production in Kazakhstan, the features of using a new neuroprogramming method for analyzing data from field experiments and predicting yield are considered. It is shown that using historical statistics over several years, the program can create a trained model that is useful for predicting fu...
Article
This study focuses on modelling tropospheric ozone using neural networks to predict its concentration depending on environmental parameters. Predicting tropospheric ozone concentration is an important task, especially in recreational areas, since it harms human health. Considering the great complexity in describing the mechanisms of formation and d...
Article
An extended targeting and synthesis procedure using the Pinch approach has been developed for material resource conservation networks with multiple contaminants (e.g. water recycling network with multiple constraints). The Sink and Source Composite Curves (CC) are constructed for each contaminant (load vs flowrate). In this work, a 'polygon' rule i...
Article
Designing water symbiosis networks in an industrial site is aimed to solve the water quality and security problem by minimising freshwater consumption or pollutant discharge. However, implementing the symbiosis requires an expensive capital cost on the site and may need cost compensation by the authority to facilitate the operation. This work aims...
Article
The European Union (EU) has the world's most extensive regional power trade, making it essential for the EU environmental energy policies. Understanding the nexus amongst water, power and CO2 emissions is essential for sustainable water and energy resource management. Although a number of related studies on the nexus have been conducted, integratin...
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Global warming and climate change urge the deployment of close carbon-neutral technologies via the synthesis of low-carbon emission fuels and materials. An efficient intermediate product of such technologies is the biomethanol produced from biomass. Microalgae based technologies offer scalable solutions for the biofixation of CO2, where the produce...
Article
Waste segregation, recycling and reduction have been prioritised in the Circular Economy transition of household waste management to reduce environmental impacts. With digitalisation and innovation developments in waste management, residents become more active on waste management-related social media platforms. However, it is still needed a tangibl...
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This work aims to extend the Pinch-based approach, namely the Material Recovery Pinch Diagram to identify the minimum numbers of water mains/headers required, flowrates and concentrations of the contaminants inside the water mains/headers. The freshwater target should be first determined using the Source and Sink Composite Curves (CC) representatio...
Article
This paper proposes a novel method combining Pinch Methodology and waste hydrogen recovery, aiming to minimise fresh hydrogen consumption and waste hydrogen discharge. The method of multiple-level resource Pinch Analysis is extended to the level of Total Site Hydrogen Integration by considering fresh hydrogen sources with various quality. Waste hyd...
Article
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With the long-term operation of Heat Exchanger Networks (HENs), fouling is a frequent problem. This is related to decreasing long-term heat transfer performance. Fouling decrease the heat transfer coefficient and reduce the efficiency of heat exchange. Different fluid types have different characteristics in corrosiveness and contribute to different...
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This study seeks to explore the Energy-Carbon-Water nexus of China, identifying the regional transmissions of embodied energy consumption, CO2 emissions and water consumption in the coastal area of China. Nice provinces are taken into consideration, and the Multi-Region Input-Output model is employed. The critical transmissions of embodied Energy-C...
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The article discusses the current state-of-the-art in the tin industry and the prospects of the Republic of Kazakhstan. The evaluation is performed in terms of the development of domestic tin production for the growing global demand and the development of the domestic high-tech industry. The study includes the main domestic sources of the raw mater...
Article
Hybrid energy systems have been widely used for residential and industrial purposes. In this system, the total energy requirement of each unit can be met with heat and electricity. Pinch Analysis becomes a widely used tool for Process Integration, and using Pinch Analysis for Heat Integration is well-established. However, for the combined heat and...
Article
Energy conservation and efficiency improvement are critical problems for industrial process systems. Heat exchanger network retrofit has emerged as a powerful tool for energy-saving and Heat Integration, but the topology modification with new heat exchangers and re-piping is expensive and demands a long payback period. In this study, heat transfer...
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Resource recovery has an essential role in achieving sustainable development. This study aims to minimise the environmental footprint of biomass integration for energy recovery, where a wide range of biomass, including manure, residual and forest wood, are considered. The assessed case study is the Tomsk region in the Russian Federation, focusing o...
Article
Proper resources recycling or reusing planning helps the industrial sites to reduce reliance on raw resources. There are a lot of previous researches had applied the Pinch Analysis on the resources recycling problem. However, there is not much work completed on targeting the materials headers or mains from the sources of the plants. This work exten...
Article
Geothermal energy is a promising renewable energy source that has been developed by many countries in recent years. It can be utilised to meet various energy demand. This paper studies the performance of integrating geothermal energy in the Locally Integrated Energy Sector (LIES). The heating and cooling demand of various processes should be satisf...
Article
The trade-off between the degree of circularity in industrial and urban processes and the spent resources in terms of energy and funds poses a challenging task. Material and energy flows feature different global patterns, which sets them as two interacting dimensions in the process. This work proposes the Multi-Resource Integration Map concept for...
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The European Union aims to reduce Greenhouse Gas (GHG) emissions by 55% before 2030 compared to 1990 as a reference year. One of the main contributions to GHG emissions comes from the household sector. This paper shows that the household sector, when organised into a form of prosumer microgrids, including renewable sources for electric, heating and...
Article
Process Integration tool has served the process industries by identifying resource conservation solutions that minimise process waste, reducing the environmental impacts and costs. For dealing with water and wastewater minimisation, Pinch-based targeting and network design approaches are well established to handle single quality water conservation...
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This article evaluates the processing of Municipal Solid Waste (MSW) and its contribution to sustainability from the viewpoint of its net exergy balance. The evaluation follows the recent framework for estimation of Exergy Footprint and Exergy Profit for a given Process System. The method evaluates the Exergy Assets and Liabilities, estimating the...
Article
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Heat exchanger network (HEN) retrofit is an effective way to reduce energy consumption and improve energy efficiency. A key criterion in industrial practice to evaluate the performance of a retrofit plan is the minimising total annualised cost. However, when pursuing the goal of minimising total annualised cost by graphical tools, sub-optimal solut...
Article
This work presents a systematic resource targeting procedure in the domain of multiple contaminants water recycling/reuse network. A resource-allocation model was developed and modified to determine the model characteristics, to obtain the optimal solution. By inferring from the formulations, it is recognised that each water sink is constrained by...
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The Water-Energy-Carbon Emissions (WEC) nexus has been drawing increasing attention. However, very few studies, to date, were conducted to comprehensively review the assessment approaches, challenges and trends of future works for regional and sectoral CWC nexus. This paper aims to analyse and review the WEC nexus assessment methods, challenges of...
Article
The worldwide energy demands and resource consumption are rising despite the efforts for energy saving and emission reduction. This results from the combination of the supply chain losses, the rebound effect of demand increases, following efficiency improvements, and the vigorous economic development in South-East Asia. Even under the COVID-19 cris...
Article
In the industry, there are frequently prohibited and restricted matches in the Heat Exchanger Networks (HENs). These matches could cause risk cost when failures happen. Some matches of streams can be entirely prohibited, but some may only have a certain level of restriction. The margins are set up, based on the risk cost assessment, whether to exch...
Article
The paper presents an extension of Pinch Analysis and namely, Total Site Process Integration. It benefits from up to date developments and introduction of Total EcoSite Integration for urban and industrial symbiosis. An important development is Pinch Analysis for Solid Waste Integration which is a crucial step for the symbiosis in a circular econom...
Article
This Virtual Special Issue contains extensions of some of the papers presented at the 22nd Conference of Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction (PRES′19) in Crete, Greece on the 20 to 23 October 2019 related to the scope of Renewable and Sustainable Energy Reviews. The works are not limited to revi...
Chapter
The decisions on synthesising a process network are often to optimise the payback periods based on investment cost. In addition to the core investment and the cost of used resources, the long-term reliable operation of the process is also crucial. Given available states and technologies of the assets, this study aims to identify the long-term optim...
Chapter
One way of simultaneously minimising the use of fresh resources and pollution reduction is the practice of industrial and urban symbiosis, implementing Circular Economy. In the current work, it has been shown that the circularity rate alone is not a sufficient criterion to achieve resource and footprint minimisation. It is necessary to evaluate the...
Article
Process Optimisation has been the core topic in chemical process industries for decades. However, the performance of the asset strongly influences the production efficiency as well. In the case of Heat Exchanger Network (HEN), the retrofit decisions are often aimed to maximise energy savings and minimise the associated cost. However, the age and pe...
Article
The operational performance of a chemical process plant highly depends on the assets' condition and maintenance practices. As chemical processes are highly complex systems, increasing the risk frequencies and their interactions, the maintenance planning becomes crucial for stable operation. This paper provides a critical analysis of the recently de...
Article
In this study, a Quantitative-Qualitative Water Footprint (QQWFP) is proposed and defined as the total cost of water quantity consumption and the cost of removing the contaminants generated in the water use process. The QQWFP consists of two sub-indicators, Quantitative Water Footprint (WFqt) and Qualitative Water Footprint (WFql), determining the...
Article
Heat Integration with heat exchanger network (HEN) is a widely used way to save energy and improve efficiency. Varied types of heat exchangers and materials would influence the investment cost and affect the design of HEN retrofit. This paper critically reviews the features of various types of heat exchangers, their working conditions and investmen...
Article
The EU27 countries exert significant influence on the global patterns of the CO2-Emissions-Water-Energy (CWE) nexus. However, whether the associated benefits are similar for all countries is unclear. In this paper, an EU27 multiregional input-output model, at a sector level to identify the inter-regional and -sectoral CWE flows, and clarify the reg...
Article
Heat exchanger leakage leads to the shutdown of the whole set of equipment, which affects the economy of the production and directly threatens the safe operation of equipment. This contribution aims to add a quantitative leakage risks characterisation of including or excluding specific process streams into the dataset for Heat Integration (HI). Thi...
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Water use within power supply chains has been frequently investigated. A unified framework to quantify the water use of power supply chains deserves more development. This article provides an overview of the water footprint and virtual water incorporated into power supply chains. A water-use mapping model of the power supply chain is proposed in or...
Article
This contribution starts from the broad perspective of the global material cycles, analysing the main resource and pollution issues world-wide from the viewpoint of the disturbances to these cycles caused by human activities. The issues are analysed in the light of the currently developing COVID-19 pandemic with the resulting behavioural and busine...
Preprint
The Water Cascade Table used for targeting and designing for single contaminant material recycling network is extended to multiple constraints (multi-contaminants) in this work. Based on previous analysis, multiple cascades with individual contaminant/quality have to be analysed sequentially. Each contaminant is assigned with a cascade table. Each...
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