“…It has been observed from Fig. 6 that the designed exchangers are all presented at the optimal area for heat recovery (above the Pinch) as explained previously by Gadalla [ 39 ]. Fig.…”
Biodiesel production using supercritical methanolysis has received immense interest over the last few years. It has the ability to convert high acid value feedstock into biodiesel using a single-pot reaction. However, the energy intensive process is the main disadvantage of supercritical biodiesel process. Herein, a conceptual design for the integration of supercritical biodiesel process with organic Rankine cycle (ORC) is presented to recover residual hot streams and to generate electric power. This article provides energy and techno-economic comparative study for three developed scenarios as follows: original process with no energy integration (Scenario 1), energy integrated process (Scenario 2) and advanced energy integrated process with ORC (Scenario 3). The developed integrated biodiesel process with ORC resulted in electric power generation that has not only satisfied the process electric requirement but also provided excess power of 257 kW for 8000 tonnes/annum biodiesel plant. The techno-economic comparative analysis resulted in favouring the third scenario with 36% increase in the process profitability than the second scenario. Sensitivity analysis has shown that biodiesel price variation has significant effect on the process profitability. In summary, integrating supercritical biodiesel production process with ORC appears to be a promising approach for enhancing the process techno-economic profitability and viability.
“…It has been observed from Fig. 6 that the designed exchangers are all presented at the optimal area for heat recovery (above the Pinch) as explained previously by Gadalla [ 39 ]. Fig.…”
Biodiesel production using supercritical methanolysis has received immense interest over the last few years. It has the ability to convert high acid value feedstock into biodiesel using a single-pot reaction. However, the energy intensive process is the main disadvantage of supercritical biodiesel process. Herein, a conceptual design for the integration of supercritical biodiesel process with organic Rankine cycle (ORC) is presented to recover residual hot streams and to generate electric power. This article provides energy and techno-economic comparative study for three developed scenarios as follows: original process with no energy integration (Scenario 1), energy integrated process (Scenario 2) and advanced energy integrated process with ORC (Scenario 3). The developed integrated biodiesel process with ORC resulted in electric power generation that has not only satisfied the process electric requirement but also provided excess power of 257 kW for 8000 tonnes/annum biodiesel plant. The techno-economic comparative analysis resulted in favouring the third scenario with 36% increase in the process profitability than the second scenario. Sensitivity analysis has shown that biodiesel price variation has significant effect on the process profitability. In summary, integrating supercritical biodiesel production process with ORC appears to be a promising approach for enhancing the process techno-economic profitability and viability.
“…As has been discussed by some researchers in publications referred to earlier, storage of recovered energy is an important consideration if one needs to avail of most of the benefits which the implementation of pinch analysis confers. Minimizing storage requirements would obviously result in a reduction in the capital investments called for, as discussed by Chaturvedi & Bandyopadhyay [108] and Brunner et al [109] Gadalla, [110,111] in three related publications, introduced a novel graph-ical technique which can be looked upon as an offshoot/aid/appendage of the conventional pinch analysis technique. This new approach which the author recommends as a user-friendly educational tool, represents the hot and cold streams as horizontal and vertical lines in a T-T diagram (which is different from the T-H diagram in conventional pinch analysis).…”
Section: Industrial Sites In Generalmentioning
confidence: 99%
“…As Table 1 in the next section shows, offshoots and extensions have entrenched themselves over a relatively short period of time. [109], [110], [111] Water footprint pinch analysis (WFPA)…”
Pinch analysis, as a technique to optimise the utilisation of resources, traces its beginnings to the 1970s in Switzerland and the UK ETH Zurich and Leeds University to be more precise. Over four decades down the line, this methodology has entrenched itself in research circles around the world. While the technique was developed, to begin with, for energy (heat) recovery, it has since then expanded to embrace several other fields, and enabled optimisation of resource utilisation in general. The motive behind this article is to perform a focused, selective review of recent case studies from the developing world and transition economies, having 'pinch analysis' in their titles and thereby as their 'core, crux and gist', during the period 2008-2018. The resources focused on, include heat energy, electrical energy, water, solid waste, money, time, land (surface area), storage space (volume), human resources, mass of resources in general and hydrogen, while a handful of publications have their focus on carbon dioxide (greenhouse gases in general) emissions. Multi-dimensional pinch analysis promises to be an effective tool for sustainability analysis in the years to come; most importantly in the developing world where social well-being and economic development are priorities in the years ahead, and they ought to be attained by a simultaneous truncation of the environmental footprint, in other words, an optimisation of resource utilisation as well as adverse environmental impacts. In other words, the focus ought to be on sustainable production (efficiency) and consumption (sufficiency).
“…Pinch Analysis has achieved a great deal of success in industrial applications and has been established as a standard methodology in process design [3]. Further improvement of the methodology is currently still attracting interest [4]. Detailed introductions to HEN synthesis can be found in an early review by Gundersen and Naess [5] where both academic research and industry perspectives were presented.…”
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