A new technology for cost effective low grade waste heat recovery

Langan, Michael; O'Toole, Kevin

doi:10.1016/j.egypro.2017.07.261

Cited by 29 publications

(12 citation statements)

References 4 publications

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“…The Transcritical CO 2 power cycles have capacity to generate more power with better efficiencies than ORC but a major hindrance to its application is that at transcritical stage, the properties of the working fluid are not distinctively liquid or gas and as such lack suitable expanders which are multi-phase compatible and unaffected by the small liquid droplets and associated erosion in multi-phase flow. From literature, initial selection of carbon dioxide for investigation as the working fluid for transcritical cycle was primarily based on: first, its low critical pressure which is only a third that of water, allowing lesser operating pressures; second, its stability and inert nature within the operating temperature range of interest, third, there was sufficient information on the properties of carbon dioxide, hence cycle analysis was based on fairly credible data, and lastly, carbon dioxide is richly available, non-toxic and relatively cheap [62].…”

Section: The Transcritical Co2 Power Cyclementioning

confidence: 99%

“…Elliot et al [22] developed a waste heat energy recovery framework to provide industrial sectors with a four step methodology in assessing production activities in facilities: evaluating the potential of waste heat source(s) and sink(s) in terms of exergy balance and temporal availability, selecting appropriate heat recovery technologies and decision support based on economic benefits. Langan and O'Toole [2] assessed the cost effectiveness of a new technology for recovery of low grade heat -Exergyn Drive (an innovative, new engine cycle that operates on hot water). For the first time, this low-grade waste-heat recovery technology delivered attractive payback periods less than 3 years and returns on investment without the need for additional incentives.…”

Section: Introductionmentioning

confidence: 99%

“…Globally, industrial and economic developments are strongly associated with increasing use of fossil fueled-combustion systems [1]. Industrial sector covers about a third of world energy consumption, which reportedly increased by 61% between 1971 and 2004 [2], risen more than 40% between 1990 and 2008 [3], and is expected to grow by 34% between 2014 and 2035 [4].…”

Section: Introductionmentioning

confidence: 99%

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Waste Heat Recovery Technologies: Pathway to Sustainable Energy Development

Oyedepo

Fakeye

2021

Journal of Thermal Engineering

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The aim of this study was to review the significant of waste heat recovery technologies as means of achieving sustainable energy development. Most developing nations of the World are faced with the enormous release of industrial waste heat of low temperature grade to the environment. Unlike material waste that is clearly visible, waste heat can be difficult to identify and evaluate both in terms of quantity and quality. Hence, understanding the availability of waste heat, and the ability to recover it, offer great opportunity to reduce energy costs and associated environmental impacts. Utilizing low-grade energy from waste heat sources is considered to offer a significant contribution to improving overall energy efficiency in the energy-intensive industrial sectors. The concept of industrial waste heat is explained, potential sources of waste heat from industries are identified, and the technologies available for waste heat recovery are presented in this study. From the review study, it is shown that about 72% of the global primary energy consumption is lost after conversion, while 63% of the considered waste heat streams arise at a temperature below 100 °C in which electricity generation has the largest share followed by transportation and manufacturing industry. The results of this study reveals that considerable amount of waste heat can be technically and economically recovered through sustainable technologies with prospective capacity for the much desired sustainable energy development. Specifically, in-depth utilization of waste heat resources can effectively moderate the rate of depletion of the fossil fuels and sufficiently reduce toxic emissions to within acceptable limits that are compatible to the projected time of full deployment of renewable energy (RE) source.

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Section: The Transcritical Co2 Power Cyclementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Waste Heat Recovery Technologies: Pathway to Sustainable Energy Development

Oyedepo

Fakeye

2021

Journal of Thermal Engineering

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“…Xu et al [19] addressed LGH stream barriers and reported recommendation on how to overcome issues of lack of global optimization methodology, high cost of capital, and lack of synchronization between waste heat supply and demand in time, space, and energy grade. Langan and O'Toole [20] addressed the key -as they called it -barrier of cost effectiveness for LGH stream, and proposed a new technology to overcome it. Additional WHR technologies and their application can be found in [21].…”

Section: Introductionmentioning

confidence: 99%

Adoption of Waste Heat Recovery Technologies: Reviewing the Relevant Barriers and Recommendations on How to Overcome Them

et al. 2022

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The wide adoption of heat recovery technologies in industry is hampered by specific “barriers” related to both technical and non-technical issues. This paper attempts to determine these barriers and make recommendations on how to address them. First, a literature review of related material is presented. Among numerous barriers, the main ones identified are (i) lack of information, (ii) lack of technology knowledge, (iii) technology risks, (iv) high initial and running and maintenance costs, (v) lack of financial support and lack of governmental incentives, (vi) size and available space limitations, (vii) lack of available infrastructure, (viii) production constraints and risk of production disruptions, (x) risk of the system negative impact on the company operations, and (xi) policy and regulations restrictions. Then, based on the above, a structured questionnaire on barriers to the adoption of waste heat recovery (WHR) technologies was prepared and issued to a number of industries throughout the European Union. Upon analyzing the questionnaire, an assessment of the importance and negative impact of each of the above-mentioned barriers is made. Subsequently, strategies and recommendations on how to overcome the barriers is reported. These recommendations are hoped to be adopted as far as possible in the packaging, installation, commissioning, and demonstration of new and old WHR technologies.

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“…However, a higher range of temperature is required by some industrial processes, especially between 100 and 130 ºC (Chua et al, 2010;Seck et al, 2015). Thus, the attempts to introduce high-temperature heat pumps (HTHPs) have attracted significant attention for waste heat recovery in industrial processes (Langan and O'Toole, 2017). In addition, the integration of HTHPs as a heat source for the industrial processes leads to a reduction of the fossil fuels dependence, promoting a decarbonised and sustainable industrial sector.…”

Section: Introductionmentioning

confidence: 99%

Theoretical evaluation of different high-temperature heat pump configurations for low-grade waste heat recovery

Mateu-Royo

Navarro-Esbrí

Amat-Albuixech

et al. 2018

International Journal of Refrigeration

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Highlights:  The energy performance and volumetric heating capacity of different vapour compression configurations are compared.  HCFO-1233zd(E), HFO-1336mzz(Z), Butane and n-Pentane are considered as alternative working fluids for HFC-245fa.  The alternatives suggested increase the energy performance in all conditions and configurations.  The proper configuration selection is highly dependent on the temperature lift between the evaporation and condensing temperatures.  n-Pentane achieves the highest COP of 3.85 for heating production up to 150 ºC.

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A new technology for cost effective low grade waste heat recovery

Cited by 29 publications

References 4 publications

Waste Heat Recovery Technologies: Pathway to Sustainable Energy Development

Waste Heat Recovery Technologies: Pathway to Sustainable Energy Development

Adoption of Waste Heat Recovery Technologies: Reviewing the Relevant Barriers and Recommendations on How to Overcome Them

Theoretical evaluation of different high-temperature heat pump configurations for low-grade waste heat recovery

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