Site-wide low-grade heat recovery with a new cogeneration targeting method

Kapil, Ankur; Bulatov, Igor; Smith, Robin; Kim, Jin‐Kuk

doi:10.1016/j.cherd.2011.09.001

Cited by 49 publications

(18 citation statements)

References 5 publications

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“…In the work of Kapil et al [57] the potential to generate work, heat and chilling is evaluated using the heat available from processes on a site. In their work, the waste heat sources are collected at a single temperature, and heat rejected from the site utility system is not included, thus interactions between the utility system and the site processes are neglected.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the potential of process sites for waste heat recovery

et al. 2016

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Section: Introductionmentioning

confidence: 99%

Evaluating the potential of process sites for waste heat recovery

et al. 2016

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“…The work highlights the strong dependence of high performance ORC integration strategies on the specific characteristics of the background process. With a focus on site utility systems with multiple steam levels and turbines, Kapil et al [114] introduce a co-generation targeting method that considers the optimization of pressure levels together with integration options for ORCs and heat pumps as low grade heat utilization options.…”

Section: Reviewed Approachesmentioning

confidence: 99%

Systematic Methods for Working Fluid Selection and the Design, Integration and Control of Organic Rankine Cycles—A Review

2015

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Efficient power generation from low to medium grade heat is an important challenge to be addressed to ensure a sustainable energy future. Organic Rankine Cycles (ORCs) constitute an important enabling technology and their research and development has emerged as a very active research field over the past decade. Particular focus areas include working fluid selection and cycle design to achieve efficient heat to power conversions for diverse hot fluid streams associated with geothermal, solar or waste heat sources. Recently, a number of approaches have been developed that address the systematic selection of efficient working fluids as well as the design, integration and control of ORCs. This paper presents a review of emerging approaches with a particular emphasis on computer-aided design methods.

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“…In subsequent work, Kapil et al (2012) The main findings of the investigation of Kapil et al (2012), for each of the considered…”

Section: Total Site Analysismentioning

confidence: 99%

“…The investigation of Kapil et al (2012) showed the overall comparison between the various options for LGWH recovery technology. They also recommended the results should be interpreted carefully because the calculation was based on particular cost parameters, specified site conditions and fixed operating conditions of upgrading technologies.…”

Section: ) Integration Of Bfw Heatingmentioning

confidence: 99%

“…However, Kapil et al stated that with different economic costing parameters, LGWH recovery and upgrade should be selected and designed while simultaneously considering the system-wide environment and constraints, because the optimal heat upgrade technology depends strongly on the site's fuel and electricity cost, condensate management system, and quality and quantity of LGWH. Kapil et al (2012) also recommended that the methodology developed should be extended so that renewable energy sources could be integrated into the total site, and over-the-fence process integration between process sites and, potentially, other third parties could be considered. Heat can also be recovered between processes through the LP steam system.…”

Section: ) Integration Of Bfw Heatingmentioning

confidence: 99%

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Improving the assessment of process reagent plants and utilities for high temperature hydrometallurgical process plant during early stage project development

Reuter¹

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The current approach taken during the early stages of project development for high temperature hydrometallurgical plants (HTHPs) does not allow time for evaluating process reagent plants or adequately assessing the potential to recover low grade waste heat (LGWH). Therefore, there is a greater risk of making sub-optimal decisions when selecting process reagent plant technology and integrating LGWH recovery into the overall facility design. These decisions have a detrimental impact on energy efficiency and economic outcomes.The primary reason for the lack of integration of process reagents plants -and the related assessment of LGWH available for recovery -lies in the absence of a modified gated project development methodology, including the necessary models, to allow for better decision making in the early stages of project development.A modified project development process has been developed for use from the Scoping Study (FEL-1) stage to Front End Engineering Design (FEL-3). This methodology will allow project design engineers to independently and efficientlyusing minimal effort -evaluate and rank process reagent technologies by plant type and also by combination, for a given set of technical and financial parameters.The methodology includes the use of empirical models for hydrometallurgical plant and process reagent plant prediction, which have been developed based on actual plant design data. The models can cater for different hydrometallurgical plant scopes and a range of plant capacities. The evaluation was undertaken using a purposedesigned, integrated technical and financial model.Case studies based on a nickel laterite flowsheet were developed to demonstrate the evaluation process; the ultimate objective was to select and rank the combinations of process reagent plant technologies. The evaluation also identified how changes in major operating cost inputs affected technology selection.The benefits of applying the developed methodology during Pre-feasibility Study Level (FEL-2) include earlier selection of process reagent plant technology and specification for Front End Engineering Design (FEL-3). As a result, more definitive information is provided for procurement activities. Additionally, this approach Page iii produces an integrated overall plant facility design, maximising the project's economic value and minimising future evaluation effort and potential re-work.The key outcomes from the research were:  Electric power generation of up to 50% of total plant load is potentially available using organic Rankine cycle LGWH recovery technology for the metals plant scope, with corresponding significant greenhouse gas emission reductions. The methodology could be extended to include other material flows such as water, process flow sheets with similar characteristics, and the design and evaluation of suitable engineered multi-component systems. The viability of the recovery of LGWH is improved when included in the early stages of design, as the options can be appropriately assessed in conjunction wit...

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Site-wide low-grade heat recovery with a new cogeneration targeting method

Cited by 49 publications

References 5 publications

Evaluating the potential of process sites for waste heat recovery

Evaluating the potential of process sites for waste heat recovery

Systematic Methods for Working Fluid Selection and the Design, Integration and Control of Organic Rankine Cycles—A Review

Improving the assessment of process reagent plants and utilities for high temperature hydrometallurgical process plant during early stage project development

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