Publications
240 results found
Tajudin ZB, Diaz-Bejarano E, Coletti F, et al., 2015, 435539 Effect of friction factor correlations and propagation errors on differential pressure in a crude OIL fouling measuring RIG, Pages: 446-447
In order to detect crude oil fouling experimentally, primary measurements of differential pressure and temperatures must be obtained with high fidelity, accuracy and reproducibility at (or close to) industrial conditions. Information of the thermal and hydraulic effects of fouling can be studied by using robust models to decouple the various phenomena involved. To start with, it is important to have a reliable set of primary measurements in which the robust model could be validated against the experiment data.
Macchietto S, Coletti F, 2015, Innovation: Better together, TCE The Chemical Engineer, Pages: 24-27, ISSN: 0302-0797
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- Citations: 2
Yang J, Tajudin ZB, Coletti F, et al., 2015, Numerical simulation of fouling in crude-oil heat exchangers: The interaction between different fouling routes, Pages: 833-842
Diaz-Bejarano E, Coletti F, Macchietto S, 2015, Detection of changes in fouling behavior by simultaneous monitoring of thermal and hydraulic performance of refinery heat exchangers, 12TH INTERNATIONAL SYMPOSIUM ON PROCESS SYSTEMS ENGINEERING (PSE) AND 25TH EUROPEAN SYMPOSIUM ON COMPUTER AIDED PROCESS ENGINEERING (ESCAPE), PT B, Vol: 37, Pages: 1649-1654, ISSN: 1570-7946
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- Citations: 11
Coletti F, Crittenden BD, Haslam AJ, et al., 2015, Modeling of Fouling from Molecular to Plant Scale, CRUDE OIL FOULING: DEPOSIT CHARACTERIZATION, MEASUREMENTS, AND MODELING, Editors: Coletti, Hewitt, Publisher: GULF PROFESSIONAL PUBL, Pages: 179-320, ISBN: 978-0-12-801256-7
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- Citations: 7
Diaz-Bejarano E, Pelloja G, Coletti F, et al., 2015, Heat Exchanger Bypass Control to Mitigate the Cost of Fouling in Refinery Preheat Trains, ICHEAP12: 12TH INTERNATIONAL CONFERENCE ON CHEMICAL & PROCESS ENGINEERING, Vol: 43, Pages: 2119-2124, ISSN: 1974-9791
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- Citations: 3
Tajudin Z, Martinez-Minuesa JA, Diaz-Bejarano E, et al., 2015, Experiment Analysis and Baseline Hydraulic Characterisation of HiPOR, a High Pressure Crude Oil Fouling Rig, ICHEAP12: 12TH INTERNATIONAL CONFERENCE ON CHEMICAL & PROCESS ENGINEERING, Vol: 43, Pages: 1405-1410, ISSN: 1974-9791
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- Citations: 3
Coletti F, Crittenden BD, Macchietto S, 2015, Basic Science of the Fouling Process, CRUDE OIL FOULING: DEPOSIT CHARACTERIZATION, MEASUREMENTS, AND MODELING, Editors: Coletti, Hewitt, Publisher: GULF PROFESSIONAL PUBL, Pages: 23-50, ISBN: 978-0-12-801256-7
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- Citations: 12
Hashim H, Ho WS, Lim JS, et al., 2014, Integrated biomass and solar town: Incorporation of load shifting and energy storage, Energy, Vol: 75, Pages: 31-39, ISSN: 0360-5442
The IBS (Integrated Biomass Solar) town is a concept which encourages local community to utilize biomass waste comprehensively with strong ties between community and local stakeholders. This paper discusses an IBS model and solution for an electrically self-sufficient eco-village with and without LS (load shifting). ES (energy storage) is also incorporated to help reduce electricity demand during peak periods and smooth variations in power generation by variable generation of solar power. Application to a realistic case study shows that substantial technical and economic benefits are achieved through the implementation of IBS with LS and ES. In this study, the LS is used mainly to increase demand during periods of high supply and also shift the load to intervals with low demand. This reduces the size of ES significantly, where the load is subject to distinct weekday and weekend profiles. The study shows that highly competitive electricity prices are obtained and the concept offers the opportunity to spur economic growth and environmental protection through energy efficiency improvement and deployment of low-carbon technologies.
Galvanin F, Barolo M, Macchietto S, et al., 2014, Identification of Physiological Models of Type 1 Diabetes Mellitus by Model-Based Design of Experiments, Process Systems Engineering, Pages: 545-581, ISBN: 9783527316847
Ho WS, Khor CS, Hashim H, et al., 2014, SAHPPA: a novel power pinch analysis approach for the design of off-grid hybrid energy systems, CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY, Vol: 16, Pages: 957-970, ISSN: 1618-954X
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- Citations: 43
Vianello C, Macchietto S, Maschio G, 2013, Risk Assessment of CO<sub>2</sub> Pipeline Network for CCS - A UK Case Study, LP2013 - 14TH SYMPOSIUM ON LOSS PREVENTION AND SAFETY PROMOTION IN THE PROCESS INDUSTRIES, VOLS I AND II, Vol: 31, Pages: 13-18, ISSN: 2283-9216
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- Citations: 3
Hashim H, Ho WS, Lim JS, et al., 2013, Integrated Biomass and Solar Town Concept for Smart Eco-Village, 16th International Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction (PRES), Publisher: AIDIC SERVIZI SRL, Pages: 577-582, ISSN: 2283-9216
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- Citations: 5
Vianello C, Macchietto S, Maschio G, 2012, Conceptual Models for CO<sub>2</sub> Release and Risk Assessment: a Review, Publisher: AIDIC SERVIZI SRL
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- Citations: 15
Galvanin F, Barolo M, Macchietto S, et al., 2011, Identification of Physiological Models of Type 1 Diabetes Mellitus by Model-Based Design of Experiments, Process Systems Engineering, Pages: 545-581, ISBN: 9783527316960
Coletti F, Macchietto S, Polley GT, 2011, Effects of fouling on performance of retrofitted heat exchanger networks: A thermo-hydraulic based analysis, COMPUTERS & CHEMICAL ENGINEERING, Vol: 35, Pages: 907-917, ISSN: 0098-1354
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- Citations: 26
Coletti F, Macchietto S, 2011, A Dynamic, Distributed Model of Shell-and-Tube Heat Exchangers Undergoing Crude Oil Fouling, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, Vol: 50, Pages: 4515-4533, ISSN: 0888-5885
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- Citations: 65
Galvanin F, Barolo M, Macchietto S, et al., 2011, Optimal design of clinical tests for the identification of physiological models of type 1 diabetes in the presence of model mismatch, MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING, Vol: 49, Pages: 263-277, ISSN: 0140-0118
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- Citations: 15
Macchietto S, Hewitt GF, Coletti F, et al., 2011, Fouling in Crude Oil Preheat Trains: A Systematic Solution to an Old Problem, HEAT TRANSFER ENGINEERING, Vol: 32, Pages: 197-215, ISSN: 0145-7632
Coletti F, Macchietto S, 2011, Refinery Pre-Heat Train Network Simulation Undergoing Fouling: Assessment of Energy Efficiency and Carbon Emissions, HEAT TRANSFER ENGINEERING, Vol: 32, Pages: 228-236, ISSN: 0145-7632
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- Citations: 19
Coletti F, Macchietto S, 2011, Refinery Energy Losses Due to Fouling in Heat Exchangers, Hydrocarbon World, Vol: 6
Coletti F, Hewitt GF, Dugwell DR, et al., 2010, Integrating crude oil fouling modelling and experiments on a new high pressure pilot-scale test rig, 10AIChE - 2010 AIChE Annual Meeting, Conference Proceedings
Crude oil fouling is a long-standing problem in oil refineries which causes major energy efficiency and economic losses, extra environmental emissions and disruption of operations, with related health and safety hazards. Because of the complex and interacting phenomena involved, the underlying mechanisms leading to fouling depositions are not well understood. Acquiring experimental data in a controlled laboratory environment representative of realistic refinery conditions, through very precise measurements, is a required step for gaining a better understanding of the fouling mechanisms and for testing mitigation strategies. This is important for improving refineries operational efficiency. Moreover, data on crude fouling behavior provide sensitive and important commercial information for oil companies which often base buying, pricing and allocation strategies on the quality of the crudes, including the ease with which they can be processed in specific refineries. A state-of-the-art high pressure oil rig (HIPOR) has been built at Imperial College London by a team under the lead of Prof. G. F. Hewitt. This facility is designed to process crude oil in two test sections (a tube and an annulus) up to 30 bars and 300 °C and to measure with accuracy key variables such as inlet and outlet temperatures, flowrates, heat fluxes and pressure drops. Moreover, temperature profiles across the length of the annular test section can be measured through a radiation equilibrium thermometer whilst the actual thickness of the foulant layer can be measured simultaneously using a novel dynamic gauging technique. The traditional experimental approach to crude oil fouling research focuses on the collection of fouling data which are typically interpreted through overall, lumped heat balances to yield overall fouling resistances. In this paper, an integrated approach is discussed which combines the detailed data from the above experimental apparatus with sophisticated thermo-hydraulic mod
Coletti F, Ishiyama EM, Paterson WR, et al., 2010, Impact of Deposit Aging and Surface Roughness on Thermal Fouling: Distributed Model, AICHE JOURNAL, Vol: 56, Pages: 3257-3273, ISSN: 0001-1541
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- Citations: 38
Polley GT, Wilson DI, Macchietto S, et al., 2010, Review of developments in the use of fouling models in pre-heat train design and operational analysis
This presentation will cover the application of fouling models in the design of heat exchangers for use in pre-heat trains and in the modification of pre-heat train structure to mitigate fouling; the application of thermo-hydraulic simulation in the design, revamp, and operational management of pre-heat trains; and the development of a new model for the prediction of fouling in heat exchangers used to heat crude oil. This is an abstract of a paper presented at the AIChE 2010 Spring National Meeting (San Antonio, TX 3/21-25/2010).
Polley GT, Wilson DI, Macchietto S, et al., 2010, Holistic approach to the revamping and de-bottlenecking of pre-heat trains
The revamping of pre-heat trains requires simultaneous consideration of heat recovery thermodynamics, heat exchanger technology, heat exchanger fouling, control strategy, and future plant operation. Heat flow analysis allows the engineer to link plant structure and potential heat recovery. The temperature and pressure field plots then provide guidance on the fouling that is likely to occur within the individual heat exchangers. Thermal simulation coupled with fouling models can be used to examine how individual heat exchanger designs behave in a given pre-heat train structure. This allows the engineer to explore the true economics of a proposed revamp. The same simulator can be used to evaluate de-salter control options and to identify optimal exchanger cleaning strategies. Once, a plant has been revamped, the simulator can be used to provide the operator with guidance on how fouling affects current plant performance and evaluate the consequences of removing exchangers for cleaning. This is an abstract of a paper presented at the AIChE 2010 Spring National Meeting (San Antonio, TX 3/21-25/2010).
Polley GT, Tamakloe E, Wilson DI, et al., 2010, Development of a model for the prediction of fouling in heat exchangers processing crude oil
This presentation covers the asphaltene precipitation due to fouling; chemical reaction fouling; behavior of fluid close to heat exchanger wall; fouling model based on sticking probability; comparison with laboratory measurement of fouling rate in crude oil systems; comparison with plant data from an exchanger situated in refinery in Europe; and aging of deposits that can prevent reliable mapping of laboratory data to plant data and vice versa. This is an abstract of a paper presented at the AIChE 2010 Spring National Meeting (San Antonio, TX 3/21-25/2010).
Polley GT, Wilson DI, Macchietto S, et al., 2010, Review of developments in the use of fouling models in pre-heat train design and operational analysis
Polley GT, Wilson DI, Macchietto S, et al., 2010, Holistic approach to the revamping and de-bottlenecking of pre-heat trains
The revamping of pre-heat trains requires simultaneous consideration of heat recovery thermodynamics, heat exchanger technology, heat exchanger fouling, control strategy and future plant operation. Heat flow analysis allows the engineer to link plant structure and potential heat recovery. The temperature and pressure field plots then provide guidance on the fouling that is likely to occur within the individual heat exchangers. Thermal simulation coupled with fouling models can be used to examine how individual heat exchanger designs behave in a given pre-heat train structure. This allows the engineer to explore the true economics of a proposed revamp. The same simulator can be used to evaluate de-salter control options and to identify optimal exchanger cleaning strategies. Once, a plant has been revamped the simulator can be used to provide the operator with guidance on how fouling affects current plant performance and evaluate the consequences of removing exchangers for cleaning.
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