Publications
677 results found
DEDOPOULOS LT, SHAH N, 1994, MODELLING AND SOFTWARE DEVELOPMENT FOR OPTIMAL SHORT-TERM SCHEDULING OF MAINTENANCE AND PRODUCTION IN MULTIPURPOSE PLANTS, 1994 IChemE Research Event Symposium, Publisher: INST CHEMICAL ENGINEERS, Pages: 899-901
PAPAGEORGIOU LG, SHAH N, PANTELIDES C, 1994, ENERGY INTEGRATION IN MULTIPURPOSE PLANT OPERATION, 1994 IChemE Research Event Symposium, Publisher: INST CHEMICAL ENGINEERS, Pages: 862-864
Shah N, Pantelides CC, Sargent RWH, 1993, Optimal periodic scheduling of multipurpose batch plants, Annals of Operations Research, Vol: 42, Pages: 193-228, ISSN: 0254-5330
A rigorous mathematical programming framework for the scheduling of multipurpose batch plants operated in a cyclic mode is presented. The proposed formulation can deal with batch operations described by complex processing networks, involving shared intermediates, material recycles, and multiple processing routes to the same end-product or intermediate. Batch aggregation and splitting are also allowed. The formulation permits considerable flexibility in the utilisation of processing equipment and storage capacity, and accommodates problems with limited availability of utilities. The scheduling problem is formulated as a large mixed integer linear program (MILP). For a given cycle time, it is shown that it is sufficient for the formulation to characterize a single cycle of the periodic schedule despite the existence of tasks that span two successive cycles. The optimal cycle time is determined by solving a sequence of fixed cycle time problems. The MILP is solved by a branch-and-bound algorithm modified so as to avoid exploring branches that are cyclic permutations of others already fathomed. The resulting implementation permits the solution of problems of realistic size within reasonable computational effort. Several examples are used to illustrate the applicability of the algorithm. © 1993 J.C. Baltzer AG, Science Publishers.
SHAH N, PANTELIDES CC, SARGENT RWH, 1993, A GENERAL ALGORITHM FOR SHORT-TERM SCHEDULING OF BATCH-OPERATIONS .2. COMPUTATIONAL ISSUES, COMPUTERS & CHEMICAL ENGINEERING, Vol: 17, Pages: 229-244, ISSN: 0098-1354
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- Citations: 267
SHAH N, PANTELIDES CC, SARGENT RWH, 1993, THE DESIGN AND SCHEDULING OF MULTIPURPOSE BATCH PLANTS, IFAC Workshop on Interactions Between Process Design and Process Control (Preprints), Publisher: PERGAMON PRESS LTD, Pages: 203-208
KONDILI E, SHAH N, PANTELIDES CC, 1993, PRODUCTION PLANNING FOR THE RATIONAL USE OF ENERGY IN MULTIPRODUCT CONTINUOUS PLANTS, EUROPEAN SYMP ON COMPUTER AIDED PROCESS ENGINEERING - 2 ( ESCAPE - 2 ), Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: S123-S128, ISSN: 0098-1354
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- Citations: 49
SHAH N, PANTELIDES CC, 1992, DESIGN OF MULTIPURPOSE BATCH PLANTS WITH UNCERTAIN PRODUCTION REQUIREMENTS, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, Vol: 31, Pages: 1325-1337, ISSN: 0888-5885
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- Citations: 60
SHAH N, PANTELIDES CC, 1991, OPTIMAL LONG-TERM CAMPAIGN PLANNING AND DESIGN OF BATCH-OPERATIONS, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, Vol: 30, Pages: 2308-2321, ISSN: 0888-5885
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- Citations: 29
RAPACOULIAS C, SHAH N, PANTELIDES CC, 1991, OPTIMAL SCHEDULING OF ORDER-DRIVEN BATCH CHEMICAL-PLANTS, 22ND EUROPEAN SYMP / 449TH EVENT OF THE WORKING PARTY ON THE USE OF COMPUTERS IN CHEMICAL ENGINEERING OF THE EUROPEAN FEDERATION OF CHEMICAL ENGINEERING, Publisher: ELSEVIER SCIENCE PUBL B V, Pages: 145-150
LOCKWOOD FC, RIZVI SMA, SHAH NG, 1986, COMPARATIVE PREDICTIVE EXPERIENCE OF COAL FIRING, PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE, Vol: 200, Pages: 79-87, ISSN: 0954-4062
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- Citations: 39
GOSMAN AD, LOCKWOOD IEA, SHAH NG, et al., 1982, PREDICTION OF THE FLOW, REACTION, AND HEAT TRANSFER IN A GLASS FURNACE., J ENERGY, Vol: V 6, Pages: 353-360, ISSN: 0146-0412
THE PAPER DESCRIBES THE COMPUTATION OF THE FLOW, REACTION, AND HEAT TRANSFER IN THE COMBUSTION CHAMBER REGION OF A TYPICAL INDUSTRIAL GLASS PRODUCING FURNACE. THE ECONOMY OF THE COMPUTATION IS CONSIDERABLY ENHANCED BY THE USE OF SPECIAL GRIDS; BY THE SEPARATE CALCULATION OF THE BURNER AND BULK COMBUSTION CHAMBER REGIONS IN A MANNER WHICH TAKES INTO ACCOUNT THE DIFFERING PHYSICAL NATURE OF THEIR FLOWS; AND BY A NOVELTECHNIQUE FOR THE HANDLING OF THE THERMAL RADIATION. PREDICTIONS WHICH DEMONSTRATE THE VALUE OF SUCH COMPUTATIONS TO FURNACE DESIGNERS ARE SHOWN FOR A RANGE OF OPERATING PARAMETERS.
Lockwood FC, Shaht NG, 1982, New method for the computation of probability density functions in turbulent flows, AIAA Journal, Vol: 20, Pages: 860-862, ISSN: 0001-1452
GOSMAN AD, LOCKWOOD FC, MEGAHED IEA, et al., 1982, PREDICTION OF THE FLOW, REACTION, AND HEAT-TRANSFER IN A GLASS FURNACE, JOURNAL OF ENERGY, Vol: 6, Pages: 353-360, ISSN: 0146-0412
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- Citations: 20
LOCKWOOD FC, SHAH NG, 1982, NEW METHOD FOR THE COMPUTATION OF PROBABILITY DENSITY-FUNCTIONS IN TURBULENT FLOWS, AIAA JOURNAL, Vol: 20, Pages: 860-862, ISSN: 0001-1452
Gosman AD, Lockwood FC, Megahed IEA, et al., 1980, PREDICTION OF THE FLOW, REACTION AND HEAT TRANSFER IN THE COMBUSTION CHAMBER OF A GLASS FURNACE., AIAA Paper, ISSN: 0146-3705
The paper describes the computation of the flow, reaction and heat transfer in the combustion chamber region of a typical industrial glass producing furnace. The economy of the computations is enhanced by: the use of special grids; the separate calculation of the burner and bulk combustion chamber regions in a manner which takes account of the differing physical nature of their flows; and by a novel technique for the handling of the thermal radiation.
Lockwood FC, Shah NG, 1976, IMPROVED FLUX MODEL FOR THE CALCULATION OF RADIATION HEAT TRANSFER IN COMBUSTION CHAMBERS., American Society of Mechanical Engineers (Paper), ISSN: 0402-1215
The numerical integration of the integro differential equation of radiation is too time consuming to be incorporated in an economical method for the prediction of the flow and chemical reaction in combustion chambers. A model is presented for the radiation transfer of the so-called 'flux' or 'differential approximation' variety. A six-term Taylor's series expansion is used to represent the directional dependency of intensity. This is substituted into the transfer equation which is then integrated over six selected angles to yield a closed set of partial differential flux equations. The angles of integration are made dependent on the local intensity distribution. Some preliminary comparisons with exact solutions for a hypothetical chamber indicate that this method is capable of yielding excellent accuracy.
Acha S, van Dam KH, Keirstead J, et al., Integrated modelling of agent-based electric vehicles into optimal power flow studies, Frankfurt, Germany
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