Automatic PID Control Loops Design for Performance Improvement of Cryogenic Turboexpander

Joshi, Darshna M.; Patel, Himanshu K.; Shah, Dhaval

doi:10.1088/1748-0221/10/04/t04004

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…Thus, to avoid production delays, process manufacturers require cost effective tools that helps in identifying and correcting anticipated problems before they occur and Aspen HYSYS is proved one of the suitable process analysis simulation tool [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Cryogenic Cycle with Process Modeling Tool: Aspen HYSYS

Joshi¹,

Patel²

2015

J. Inst.

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Cryogenic engineering deals with the development and improvement of low temperature techniques, processes and equipment. A process simulator such as Aspen HYSYS, for the design, analysis, and optimization of process plants, has features that accommodate the special requirements and therefore can be used to simulate most cryogenic liquefaction and refrigeration processes. Liquefaction is the process of cooling or refrigerating a gas to a temperature below its critical temperature so that liquid can be formed at some suitable pressure which is below the critical pressure. Cryogenic processes require special attention in terms of the integration of various components like heat exchangers, Joule-Thompson Valve, Turbo expander and Compressor.Here, Aspen HYSYS, a process modeling tool, is used to understand the behavior of the complete plant. This paper presents the analysis of an air liquefaction plant based on the Linde cryogenic cycle, performed using the Aspen HYSYS process modeling tool. It covers the technique used to find the optimum values for getting the maximum liquefaction of the plant considering different constraints of other parameters. The analysis result so obtained gives clear idea in deciding various parameter values before implementation of the actual plant in the field. It also gives an idea about the productivity and profitability of the given configuration plant which leads to the design of an efficient productive plant.

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Section: Introductionmentioning

confidence: 99%

Analysis of Cryogenic Cycle with Process Modeling Tool: Aspen HYSYS

Joshi¹,

Patel²

2015

J. Inst.

Self Cite

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“…The energy transmitted to the shaft can be used to drive a compressor (i.e., wastage of energy can be prevented). Figure 1 show a helium turbo-expander, that is, helium gas is used as a process sample gas [5][6][7][8].…”

Section: Turbo-expandermentioning

confidence: 99%

Performance Analysis of a Helium Turbo-expander for Cryogenic Applications with a Process Modeling Tool: Aspen HYSYS

Dm¹

2017

J Appl Mech Eng

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Cryogenic system refers to interacting group of components involving low temperature. Cryogenic engineering deals with the development and improvement of low temperature techniques, processes, and equipment. They are applicable to helium refrigerators and various liquefiers. Nowadays, the energy crisis has forced the need to recover the energy which is normally wasted in other industrial processes. Reduction of gas pressure is one of such process in which there is a high loss of energy. To prevent such high wastage of energy, Turbo-expander which is the heart for the production of low temperature by reducing the pressure to a low value, has been introduced in the industries. Turbo-expanders are used in almost every segments of the oil and gas industry to produce Cryogenic refrigeration. Before implementation of such a critical component in the plant, it is necessary to carry out the performance analysis of turbo-expander. In this paper, a process simulator called Aspen HYSYS is used for the analysis of Helium turbo-expander (Helium gas is taken as a process sample gas) and detailed observation is carried out for checking the performance of helium turbo-expander at various adiabatic efficiencies. The results provide useful indications on the selection of turboexpander to obtain required output at various efficiencies with variation in temperature. Keeping the constraints of the plant in mind, this analysis can thus result in the design of an efficient productive plant

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“…Thus, to avoid production delays that might happen due to lack of effective analysis, tools like ASPEN HYSYS help to identify and correct problems before they occur thanks to the results of the simulations [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Simulation and statistical analysis for the optimization of nitrogen liquefaction plant with cryogenic Claude cycle using process modeling tool: ASPEN HYSYS

Joshi¹

2017

J. Inst.

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Cryogenic technology is used for liquefaction of many gases and it has several applications in food process engineering. Temperatures below 123 K are considered to be in the field of cryogenics. Extreme low temperatures are a basic need for many industrial processes and have several applications, such as superconductivity of magnets, space, medicine and gas industries. Several methods can be used to obtain the low temperatures required for liquefaction of gases. The process of cooling or refrigerating a gas to a temperature below its critical temperature so that liquid can be formed at some suitable pressure, which is below the critical pressure, is the basic liquefaction process. Different cryogenic cycle configurations are designed for getting the liquefied form of gases at different temperatures. Each of the cryogenic cycles like Linde cycle, Claude cycle, Kapitza cycle or modified Claude cycle has its own advantages and disadvantages. The placement of heat exchangers, Joule-Thompson valve and turboexpander decides the configuration of a cryogenic cycle. Each configuration has its own efficiency according to the application. Here, a nitrogen liquefaction plant is used for the analysis purpose. The process modeling tool ASPEN HYSYS can provide a software simulation approach before the actual implementation of the plant in the field. This paper presents the simulation and statistical analysis of the Claude cycle with the process modeling tool ASPEN HYSYS. It covers the technique used to optimize the liquefaction of the plant. The simulation results so obtained can be used as a reference for the design and optimization of the nitrogen liquefaction plant. Efficient liquefaction will give the best performance and productivity to the plant.

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Automatic PID Control Loops Design for Performance Improvement of Cryogenic Turboexpander

Cited by 3 publications

References 6 publications

Analysis of Cryogenic Cycle with Process Modeling Tool: Aspen HYSYS

Analysis of Cryogenic Cycle with Process Modeling Tool: Aspen HYSYS

Performance Analysis of a Helium Turbo-expander for Cryogenic Applications with a Process Modeling Tool: Aspen HYSYS

Simulation and statistical analysis for the optimization of nitrogen liquefaction plant with cryogenic Claude cycle using process modeling tool: ASPEN HYSYS

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