New directions in the implementation of Pinch Methodology (PM)

Klemeš, Jiří Jaromír; Walmsley, Timothy Gordon; Jia, Xuexiu

doi:10.1016/j.rser.2018.09.030

Cited by 222 publications

(46 citation statements)

References 272 publications

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“…25,26 As also observed by Klemeš et al, 27 recent developments in the area of methods for integration of excess heat utilization technologies are mainly based on theoretical targeting approaches, and there is a lack of studies that consider system limitations and appropriate process representations. However, there are many technical and economic barriers to retrofitting industrial plants to achieve theoretical targets for process heat recovery.…”

Section: Novelty Statementmentioning

confidence: 94%

“…However, there are many technical and economic barriers to retrofitting industrial plants to achieve theoretical targets for process heat recovery. 25,26 As also observed by Klemeš et al, 27 recent developments in the area of methods for integration of excess heat utilization technologies are mainly based on theoretical targeting approaches, and there is a lack of studies that consider system limitations and appropriate process representations. It is therefore interesting to compare excess heat availability at various levels of internal process heat recovery, ranging from the theoretical to the current level.…”

Section: Novelty Statementmentioning

confidence: 94%

“…Pinch-based methods provide a simple visualization of the potential for heat recovery within the process as well as between the process and a cogeneration system or an excess heat recovery technology or between different process plants within a total site. 40,41 For a review of the latest developments in applying pinchbased methods for integration of waste heat valorization technologies, see Section 2.6.2.2 of Klemeš et al 27 .…”

Section: Pinch-based Methods For Targeting Of Industrial Excess Heatmentioning

confidence: 99%

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Characterization and visualization of industrial excess heat for different levels of on‐site process heat recovery

2019

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Summary Increased utilization of industrial excess heat (or waste heat) can reduce primary energy use and thereby contribute to reaching energy and climate targets. To estimate the potential availability of industrial excess heat, it is necessary to capture the significant heterogeneity of the industrial sector. This requires the development of methodologies based on case study assessments of individual plants, adopting a systematic approach and consistent assumptions. Since the recovery of excess heat for power generation or off‐site delivery competes with internal recovery for on‐site fuel savings, a well‐founded approach should enable a comparison of the excess heat availability at different levels of internal process heat recovery. To determine the best solution for excess heat utilization for a given process, there is a need for easy screening of various options, while considering that some techniques require heat at a constant temperature while others can exploit a nonisothermal heat supply. This paper presents a new tool, the excess heat temperature (XHT) signature, for exploring the potential heat availability and trade‐offs for excess heat utilization by weighting the heat according to predefined temperature levels and ranges. A set of reference conditions are defined, and an energy targeting approach is proposed that can be used for characterizing the Theoretical XHT signature, which represents the unavoidable excess heat that can be recovered after maximized internal process heat recovery and ideal integration of a power generation steam cycle. The Theoretical XHT signature is contrasted with the Process Cooling XHT signature, which represents the excess heat that can be recovered given the current design and operation of the process and its utility system. The XHT signature curves provide a consistent representation of the excess heat, enabling comparison between sites and aggregation of results from different case studies.

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Section: Novelty Statementmentioning

confidence: 94%

Section: Novelty Statementmentioning

confidence: 94%

Section: Pinch-based Methods For Targeting Of Industrial Excess Heatmentioning

confidence: 99%

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Characterization and visualization of industrial excess heat for different levels of on‐site process heat recovery

2019

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“…For analyzing existing industrial systems, it is important to include information about the degradation of energy through utilities, process operations, and heat exchangers . Several approaches based on pinch analysis were developed for HEN retrofit . The traditional curves of pinch analysis were intended for grassroots design, where there are many degrees of freedom, and data about the existing heat exchangers or process operations are not included.…”

Section: Introductionmentioning

confidence: 99%

Improving the network pinch approach for heat exchanger network retrofit with bridge analysis

Bonhivers¹,

Moussavi²,

Hackl

et al. 2019

Can J Chem Eng

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Economic and environmental benefits result from increasing the energy efficiency of industrial systems. This article presents the application of bridge analysis concepts to improve the methodology of network pinch for heat exchanger network retrofit. In two simple examples, we compare bridge analysis with the network pinch approach, in terms of saving energy by heat exchanger network improvement. The first example is solved with both methods, while the second can only be solved by bridge analysis. In the first example, three different solutions are proposed, and the third solution leads to 3800 kW energy savings, i.e., the full savings capacity. In the second example, no heat can be saved using the network pinch approach, but two solutions are proposed using bridge analysis, which lead to 395 kW energy savings, i.e., the full savings capacity. Then, we discuss the advantages and limits of pinch analysis and the network pinch approach. Bridge analysis provides a broader perspective on pinch analysis, explains the natural presence of a pinch in a network, shows that removing cross pinch transfers is not necessary to save energy, and helps improve heuristics for creating new cooler-heater paths in the network pinch procedure.

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“…To achieve this goal, we believe it is important to understand the distinction between research based on universal physical principles, in contrast to research based on localized socio-economic conditions. For instance, there is a clear qualitative difference between engineering tools such as Process Integration, which have firm basis in the Laws of Thermodynamics and thus provide a universally rigorous methodological framework for planning efficient use of energy and resources (Klemeš et al, 2018), in comparison to sociological constructs such as the Theory of Planned Behavior (TPB), which in a recent review is found to yield inconsistent results (Yuriev et al, 2020). In addition, socio-economic aspects such as public acceptability of technologies is usually subject to geographically localized cultural norms, as illustrated by a recent paper on mining in Australia (Lacey et al, 2019).…”

mentioning

confidence: 99%