Waste Heat Recovery in the EU industry and proposed new technologies

Agathokleous, Rafaela A.; Bianchi, Giuseppe; Panayiotou, Gregoris; Aresti, Lazaros; Argyrou, Maria C.; Georgiou, Giorgos S.; Tassou, Savvas A.; Jouhara, Hussam; Kalogirou, Soteris A.; Florides, Georgios A.; Christodoulides, Paul

doi:10.1016/j.egypro.2019.02.064

Cited by 70 publications

(35 citation statements)

References 10 publications

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“…With insight information into the different processes, together with their temperature ranges, used in all industrial sectors in the EU having been identified [see Agathokleous et al (2019), Jouhara et al (2018), Papapetrou et al (2018) and Panayiotou et al (2017)], the next step is to assess the potential market of the most intensive industrial sectors in relation to old and ''new'' technologies and their COPs and how to improve recovery techniques (Agathokleous et al 2019). It is also important to obtain further knowledge on barriers (e.g., financial, technological, legislative) to the adoption of WHR technologies and see how these can be overcome.…”

Section: Discussionmentioning

confidence: 99%

“…The Asia-Pacific region has been experiencing the highest growth rate in the last few years, of about 10% per annum, with China and India accounting for the highest number of installations of heat recovery units. For these figures to insist and expand in the future, however, and for the European manufacturing and user industry to benefit from these developments, technological improvements and innovations should take place aimed at improving the energy efficiency of heat recovery equipment and reducing installed costs [see, for example, Agathokleous et al (2019) and Jouhara et al 2018].…”

Section: Introductionmentioning

confidence: 99%

“…Among the available technologies, thermal energy storage (TES) (in particular when using phase change materials) offers the possibility of solving the problem of matching the discontinuous waste heat supply with the heat demand and achieving a better capacity factor (Miró et al 2016;Elias and Stathopoulos 2019). In addition to the convectional WHR approaches, new technologies have been proposed by Agathokleous et al (2019), including trilateral flash cycle, Joule-Brayton cycle working with supercritical carbon dioxide, flat heat pipes and condensing economizer for acidic effluents.…”

Section: Introductionmentioning

confidence: 99%

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Estimating the waste heat recovery in the European Union Industry

Bianchi

Panayiotou

Aresti

et al. 2019

Energ. Ecol. Environ.

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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.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Estimating the waste heat recovery in the European Union Industry

Bianchi

Panayiotou

Aresti

et al. 2019

Energ. Ecol. Environ.

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“…Some industrial thermal processes require a significant energy demand and are usually associated with considerable heat losses (waste heat) [2]. In the EU, thermal energy can reach 70% of the total energy use [3]. Waste heat has been estimated to represent from 20 to 50% of overall industrial energy consumption [4] in the United States.…”

Section: Introductionmentioning

confidence: 99%

Review on Energy Efficiency Progresses, Technologies and Strategies in the Ceramic Sector Focusing on Waste Heat Recovery

2020

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Thermal processes represent a considerable part of the total energy consumption in manufacturing industry, in sectors such as steel, aluminium, cement, ceramic and glass, among others. It can even be the predominant type of energy consumption in some sectors. High thermal energy processes are mostly associated to high thermal losses, (commonly denominated as waste heat), reinforcing the need for waste heat recovery (WHR) strategies. WHR has therefore been identified as a relevant solution to increase energy efficiency in industrial thermal applications, namely in energy intensive consumers. The ceramic sector is a clear example within the manufacturing industry mainly due to the fuel consumption required for the following processes: firing, drying and spray drying. This paper reviews studies on energy efficiency improvement measures including WHR practices applied to the ceramic sector. This focuses on technologies and strategies which have significant potential to promote energy savings and carbon emissions reduction. The measures have been grouped into three main categories: (i) equipment level; (ii) plant level; and (iii) outer plant level. Some examples include: (i) high efficiency burners; (ii) hot air recycling from kilns to other processes and installation of heat exchangers; and (iii) installation of gas turbine for combined heat and power (CHP). It is observed that energy efficiency solutions allow savings up to 50–60% in the case of high efficiency burners; 15% energy savings for hot air recycling solutions and 30% in the when gas turbines are considered for CHP. Limitations to the implementation of some measures have been identified such as the high investment costs associated, for instance, with certain heat exchangers as well as the corrosive nature of certain available exhaust heat.

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“…Moreover efficient energy recovery means that access to heat distribution infrastructure which utilises recovered excess heat is essential [38]. Closing this section it should be noted that the EU Commission suggests that more investments should be made to AD processes than incineration, in order to ensure that increases in recycling and reuse do not find any obstacles [39].…”

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confidence: 99%

Analysing the Energy Efficiency of EU Member States: The Potential of Energy Recovery from Waste in the Circular Economy

Halkos

Petrou

2019

Energies

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This paper examines energy efficiency across 28 selected European Union (EU) Member States and reviews the potential for energy recovery from waste according to the efficiency scores obtained. The efficiencies are assessed through data envelopment analysis (DEA) and the following variables are used, inputs: final energy consumption, labour, capital, population density and outputs: gross domestic product (GDP), nitrogen oxide (NOx) emissions, sulphur oxide (SOx) emissions and greenhouse gas (GHG) emissions for the years 2008, 2010, 2012, 2014 and 2016. Results show that most countries maintain their efficiency scores with only a few marginally improving theirs and at the same time, it is noticed that most are decreasing after 2012. Based on these efficiency scores, this paper recommends moving towards waste-to-energy with two main objectives, namely sufficient and sustainable energy production and effective treatment of municipal solid waste (MSW). This option would enhance the circular economy, whereas prioritization needs to be given to prevention, preparation for reuse, recycling and energy recovery through to disposal. Together with the EU Commission’s competition strategy, these options would ensure reliable energy supplies at rational prices and with the least environmental impacts. Moreover the efficiency scores need to be examined along the financial crisis which has been affecting the EU since 2008, showing a decrease in those efficiency scores after 2012 under a more imminent crisis.

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Waste Heat Recovery in the EU industry and proposed new technologies

Cited by 70 publications

References 10 publications

Estimating the waste heat recovery in the European Union Industry

Estimating the waste heat recovery in the European Union Industry

Review on Energy Efficiency Progresses, Technologies and Strategies in the Ceramic Sector Focusing on Waste Heat Recovery

Analysing the Energy Efficiency of EU Member States: The Potential of Energy Recovery from Waste in the Circular Economy

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