Modification of preheating heat exchanger network in crude. This includes simulation of the unit by aspen software, extracting the required information, information processing and finally correcting heat exchanger network. The network is separated into hot and cold regions, above and below the pinch respectively. A heat exchanger network obtained using the pinch design method is a network where. Hot streams are drawn at the top of the grid, and flow from left to. The methodology has been extended to apply to integrated and heat power systems. Submitted to the training incharge, ongc hazira, in partial fulfilment of summer technical training, 2014. Aspentechs energy management software, aspen energy analyzer, provides an easy environment to perform optimal heat exchanger network design and retrofit. The method is based on the pinch design method for heat exchanger networks which was first introduced by linnhoff.
The method first consider both the heat loss of a hot stream and the heat capacity flowrate of a stream with variation in temperature in the design of heat exchanger networks. A free piece of educational software for heat exchanger network design based on the pinch method is presented. Pinch software for pinch analysis do you want to reduce your thermal energy costs. Area energy and throughput targeting in debottlenecking of. This makes the region above the pinch a heat sink region and the region below the pinch a heat source region. The program also generates an optimum data set as input for the design module. Pinch analysis is a methodology for minimising energy consumption of chemical processes by calculating thermodynamically feasible energy targets or minimum energy consumption and achieving them by optimising heat recovery systems, energy supply methods and process operating conditions.
The software architecture is based on a flexible structure that allows for future enhancement. Heat exchanger network pinch point posted in student. Pinch technology for heat exchanger network design youtube. The new pinch design method for heat exchanger networks. Then is a heat exchanger network synthesis program that was developed by professor knopf at louisiana state university knopf,1989. Heat exchanger design is a heattransfer simulation software that enables the design and operational analysis of individual heat exchangers, as well as heat exchanger networks, pinch analysis, exchanger zone analysis, split flow, area payout, and cleaning cycle optimisations. For maximum energy recovery mer, energy should not be transferred across the pinch. Pinch technology is one of the best conceptual heat exchanger network synthesis techniques applied in designing new heat exchanger networks grassroot design and energy saving retrofits as well as debottlenecking of the existing networks. Applying pinch technology to energy recovery request pdf. Heat exchanger network introduction the heat exchanger network synthesis problem is one of the most studied problems in process synthesis and the development of costefficient heat exchanger networks has proven to be a challenging task. Pinch analysis design of optimised heat exchanger network the heat recovery module helps in designing and optimising an appropriate heat exchanger network for heat recovery and process integration. Pinch point is the location in heat exchanger where the temperature difference between hot and cold fluid is minimum at that location. Pinch technology is at the root of many other heat integration technologies. It has been wellestablished that the energy and capital costs of a heat exchanger network are both dependent.
It is also known as process integration, heat integration, energy integration or pinch technology. Division at the pinch recall that no heat is transferred through the pinch. Live plant data leverage production plans and schedules to develop an optimal plan for the purchase, generation and distribution of utilities. Note in 5 heat flows were exchange hot and cold streams are separated by at. Pinch technology composite curve for analysing a heat exchanger network, sources of hot and cold streams source and sink should be first identified using material and energy balances. The interface of the program has been designed focusing on getting a clear presentation of the concepts of the pinch design methods and letting students the control of all the stages of the design. For instance, the current typical flow sheet of a chemical process is shown in figure 2. Heat exchangers are detailed designed during the heat exchanger network synthesis. By designing around this point energy from utilities can be minimized.
Dagde2 1 school of science and engineering, teesside university middlesbrough, ts1, 3ba, united kingdom 2 department of chemicalpetrochemical engineering, rivers state university of. Heat exchanger network retrofit design by eliminating cross pinch heat exchangers beabu k. Heat exchanger network retrofit design by eliminating. Heat exchanger network hen is one of the major technique of energy saving. One of the most successful and generally useful techniques is that developed by bodo linnhoff and other workers. The process streams are drawn as horizontal lines, with the stream numbers shown in square boxes. Also, another way of defining pinch point is, consider two fluids having heat capacities ch for hot fluid and cc. Pinch analysis of heat exchanger networks in the crude. Computer programs and graphs are used when designing processes with the pinchtechnology. From your stream data this tool can determine pinch temperature, generate composite curves, determine ideal minimum heating and cooling utility requirements, perform stream splitting, perform stream matching, and generate basic heat exchanger network info. Complete network after pinch matches streams with unfulfilled targets are. Pinch analysis technique to optimize heat exchanger. This paper shows how the application of pinch technology can lead towards great energy savings. The pinch design method ensures that these targets are achieved during the network design.
Synthesis of heat exchanger networks considering stream. From your stream data this tool can determine pinch temperature, generate composite curves, determine ideal minimum heating and cooling utility requirements, perform stream splitting, perform stream matching, and generate basic heat exchanger. The term derives from the fact that in a plot of the system temperatures versus the heat transferred, a pinch. This page focuses on pinch analysis in the context of heat exchanger networks hens, however similar methods can be used in the design of mass exchanger networks mens. For the love of physics walter lewin may 16, 2011 duration. Using this tool, it is possible to cut down on unnecessary energy use, for a less expensive and greener process design. We have proposed a hen design system using pinch technology and multiagent. The heat exchanger network chemical engineering projects. The pinch design method for heat exchanger networks 741 note that to ensure the feasibility of complete heat network column 5. Design heat exchanger and storage networks henhesn let pinch be your network advisor optimize hens for time dependant processes visualize your thermal energy storage network.
In recent years a new methodology for the analysis and design of heat exchanger networks, called pinch technology, has led to significant energy savings in the chemical and process industries. Heat exchangers basics for efficient heat integration. It is impossible to understand them without the basic concepts of pinch technology. The second program, called hint, is considerably more complex and thus more powerful, and can be used to analyse, to design and to optimize heat exchanger networks. It integrates the networks of heat exchangers, boilers, condensers and furnaces for best energy utilization. Pinch technology for heat exchanger network design ch11 chemical engg, chemistry and others. In this system, the maximum heat recovery is derived from pinch technology. The composite curves and energy consumption targets can be easily composed when using software based on pinchtechnology. And then, an initial hen can be obtained according to the areatargeting method in order to meet the maximum heat. Pinchco applies inhouse developed innovative and unique algorithms for pinch analysis with crisscross optimisation prior to design and design tools based on insight in network behaviour.
Heatit is a pinch analysis tool based on new algorithms enabling crisscross optimisation prior to design with the view to minimising required heat exchanger surface area. It is observed that through making changes in the network of heat exchangers, by adding a cooler and a. Heat exchanger network synthesis can be facilitated by using an optimised data set for the initial design. This network is analysed based on the pinch analysis or pinch technology to ensure that all exchangers in a. Heat exchangers in numerous engineering applications are just one of many components of a system.
An educational software for heat exchanger network. A particular strength of pinch is the heat exchanger network hen, which offers a wide range of functions for the design of heat exchanger networks. The heat exchanger network of a nitric acid plant has been studied and it was found that it is. Heat exchanger network design, monitoring and optimization. Grid representation it is convenient to represent a heat exchanger network as a grid. This identifies the minimum number, but not necessarily the correct stream matches. Heat exchanger network an overview sciencedirect topics.
Abstract in this work, the hint software that is based on methods of pinch technology was applied for design, optimizing and improving the integrated heat exchanger network of crude oil preheating process in distillation unit in arak refinery with the aim of heat load reduction in the furnace. By representing the heat available in each stream and from the utilities both above and below the pinch, the minimum number of heat exchangers can be determined. Pinch analysis technique to optimize heat exchanger 1. Compute heat exchanger heat transfer factor for each exchanger in the network. Other tools and techniques include heat exchanger grid diagrams, grand composite curves, and algorithms to evaluate heat exchanger network area and capitalenergy tradeoffs. Pinch technology for the synthesis of optimal heat and. With the new approach, differences in heat transfer coefficients are exploited with the view to reducing surface area required. Heat exchanger network design using pinch analysis 2. Identify optimal heat exchanger network designs with pinch analysis and algorithms based on configurations. Welcome to the online pinch analysis tool, an interactive webbased program that automates much of the process of performing a basic pinch analysis. Energy saving in a crude distillation unit by a retrofit. Pinch analysis was initially developed for new plant designs. Pinch analysis is used to obtain the heat exchangers network with the maximum energy recovery, and a new. Both programs are based on pinch analysis for heat recovery.