This tutorial shows how to set up a counterflow heat exchanger using a finned tube to enhance heat transfer between the fluids. Numerical investigation of counter flow microchannel heat. Apr, 2019 the heat transfer rate and effectiveness were calculated for the heat exchanger. This means that as the hot fluid enters from the right, it cools against the already warmed up cold fluid from the left. Design and development of parallel counter flow heat. It is an analysis of a counterflow heat exchanger to cool the engine oil for a large industrial gas turbine engine. Design and fabrication of bank of tubes counter flow heat. Thermal analysis of double pipe heat exchanger by changing the materials using cfd.
Parallel and counter flow designs heat exchangers engineers. Counterflow plate heat exchangers with high temperature efficiency up to 93% a perfect solution for small and medium air volumes for residential or commercial applications to provide air to air heat recovery at the highest level. In ansys fluent software, how to simulate a simple 3d double pipe counterflow heat exchanger thank you. The theories of transient heat transfer in doublepipe heat exchangers were explained and followed by literature correlations. Heat transfer between fluids involving heat conduction through the pipe wall that separate them, and, for the fluids temperature difference, the heat transfer take place.
In ansys fluent software, how to simulate a simple. The image above gives a representation of the fluid flow. Heat transfer is the most important parameter to be measured as the performance and efficiency of the concentric tube heat exchanger. Asee 2014 zone i conference, april 35, 2014, university of. Asee 2014 zone i conference, april 35, 2014, university. The heat exchanger design that was chosen is a simple concentric tube double pipe heat exchanger in counterflow configuration, i think i have the intakes and outlets labeled correctly, but im having some trouble correctly defining the heat transfer surfaces. Simulation and cfd analysis of heat pipe heat exchanger using fluent to increase of the thermal efficiency. Aluminium heat exchanger by eri corporation is effective decision for energyheat recovery ventilation systems. Early development included asme accreditation with pressure vessel design and fabrication to section viii division 1. Counterflow heat exchanger energy conversion britannica. The flow regime proved to be turbulent and this was modelled using the k. This application calculates outlet stream temperature for a counterflow heat exchanger provided inlet conditions temperature, flow rate, surface area and overall htc are given. Heat exchanger theory and the heat exchanger design equation. Cfd analysis was utilized to find the outlet temperatures of parallel and counter flow heat exchangers for the inlet velocity and inlet temperature of.
The results were compared between parallel and counter flow heat exchangers. Heat exchangers are devices designed to transfer heat from one fluid to another,without the fluids coming into contact. Axisymetric counterflow heat exchanger ansys student community. Htri offers a wide range of software solutions for heat transfer equipment used by operating companies, engineering contractors, exchanger fabricators, and related industries. Performance prediction of counter flow heat exchanger by using. Model of double pipe heat exchanger the analysis was done in ansys fluent. Ansysfluent heat exchanger tutorial computational fluid. Cfd analysis and performance of parallel and counter flow. The camera has an adjustable closeup lens that can focus on objects so close that they can. Analysis the heat exchanger specific to flow rate of hot and cold fluid. Analysis of a counter flow parallelplate heat exchanger ruoxu jia, junling hu, and abubaker e.
Thermal analysis of double pipe heat exchanger by changing. Gupta and atrey 2000 studied, counter flow heat exchangers are commonly used in. Xchanger suite is software for the rating, simulation, andor design of a wide variety of heat transfer equipment. Counter flow heat exchanger cfd online discussion forums. A computational fluid dynamics model for designing heat. As well as setting the correct boundary conditions. Up to eight design conditions can be investigated for fixed, utube, kettle and floating tubesheet style exchangers. How can i carry out cfd analysis of a double pipe heat exchanger. Design and development of parallel counter flow heat exchanger. Assuming that the hot fluid enters at 500 f and leaves at 400 f, calculate the log mean temperature difference for the heat exchanger. First, the heat exchanger with its inlet header was redesigned using 3d cad software. There are 72 tubes in this heat exchanger that have been placed in 6 rows with 12. The flow configuration is concentric tube counter flow. The features of the complex geometry were simplified considerably resulting in an almost twodimensional mesh with only 30 000 mesh cells.
A computational fluid dynamics model was created for the design of a natural convection shellandtube heat exchanger with baffles. Software application to determine the heat balance in counterflow shell heat exchanger 1hana charvatova, 1dagmar janacova, 2rudolf drga, 3ondrej liska, 1martin zalesak 1department of automation and control engineering, 2department of security engineering faculty of applied informatics tomas bata university in zlin. Simulation of plate heat exchanger in ansys fluent mrcfd. Ansys fluent analysis of heat exchanger cfd online. Ansys 15 fluent tutorial for counterflow type heat exchanger. In the counter flow heat exchanger core, airflows are passed by each other along parallel aluminum plates in counter flow direction. The heat exchanger design equation can be used to calculate the required heat transfer surface area for a variety of specified fluids, inlet and outlet temperatures and types and configurations of heat exchangers, including counterflow or parallel flow. Asee 2014 zone i conference, april 35, 2014, university of bridgeport, bridgeport, ct, usa. A heat exchanger is a device which is used to transfer heat from one fluid to another, whether the fluids are separated by a solid wall so that they never mix, or the fluids are directly in contact. This allows to achieve the higher temperature efficiency than using crossflow heat exchanger core.
A set of cfd simulation is carried out for the double pipe counter flow heat exchanger and after validating the methodology of. Why counter flow heat exchangers are more efficient. Cfd analysis was utilized to find the outlet temperatures of. The temperature differential is nowhere near as high as at the start of the parallel heat exchanger. M elbalsohi, department of mechanical engineering university of bridgeport, bridgeport, ct, usa. The momentum and energy equations for the primary fluids are solved numerically and validated against a derived approximate analytical solution. In counterflow heat exchangers, the air flows are guided through a series of parallel. Concentric tube heat exchangers are built in several ways, such as a coil or in straight sections placed side by side and connected in series. What is application of parallel flow heat exchanger. Lets take the case when we want to extract the maximum amount of heat from a given hot stream.
Double pipe heat exchanger design requires use of the heat transfer rate, the log mean temperature difference, and an estimate of the overall heat transfer coefficient to calculate the estimated heat transfer surface area. Keywords counter flow heat exchanger, bank of tubes heat exchanger, heat exchanger. Parallel and counter flow designs heat exchangers although ordinary heat exchangers may be extremely different in design and construction and may be of the single or twophase type, their modes of operation and effectiveness are largely determined by the direction of the fluid flow within the exchanger. In the case of above design example the double pipe heat exchanger was modeled in the solid works fig. I tried to simulate a counterflow heat exchanger, a 2d domain axisymetric condition, including pipe walls.
Jul 31, 2016 this tutorial shows how to set up a counterflow heat exchanger using a finned tube to enhance heat transfer between the fluids. Our devices are oriented in the energy recovery direction, enabling the end consumer to save up to 93 % in. Analysis of heat transfers inside counterflow plate heat. Simulation in double pipe heat exchanger by using fluent software. Why is a counter flow heat exchanger better than a. A wide variety of counterflow heat exchanger options are available to you, such as ce, ccc, and rohs. Ansys fluent heat exchanger tutorial shell and tube. Available heat exchanges include gastoair, gastoliquid, or liquidtoliquid.
Asme uhx and tema heat exchanger software codeware. Axisymetric counterflow heat exchanger heattransfer cfd heatexchanger. I tried to simulate a counterflow heat exchanger, a 2d domain axisymetric. If this is too global, you can mark regions and then patch those regions. It is found that the specification of a constant temperature or. Based on your location, we recommend that you select. Heat exchanger is a device that facilitates the exchange. The flow rate of cooling water through the outer annulus is 0. The basic component of a heat exchanger can be viewed as a tube with one fluid running through it and another fluid flowing by on the outside. The heat transfer rate and effectiveness were calculated for the heat exchanger.
Counterflow heat exchanger energy recovery with eri. It has enriched my life, giving me an opportunity to work in a new environment of fluent. To simulate heat transfer in concentric tube heat exchanger by using cfd fluent software. The patch function applies the patch to whichever zone you select and all zones if you do not select any zones. This project increased my thinking and understanding capability as i started the project from scratch. Simulation and cfd analysis of heat pipe heat exchanger. Heat transfer enhancement in concentric tube heat exchanger. Heat exchangers with cocurrent flow of the two streams are not very often seen because of the obvious reason that it is possible to do more heat exchange if the two streams are put in countercurrent flow, providing the same heat exchange area, w.
A procedures manual was created for the doublepipe heat exchanger. The way the heat exchanger is constructed, is that the flow can only travel in z and ydirection. Cfd analysis and performance of parallel and counter flow in. Air flow and heat exchange simulation of a rotary heat. The process fluid was analysed to obtain its physical properties, and, using a flow simulation software package with the cad software, the behaviour of the fluid in the heat exchanger was calculated. Double pipe heat exchanger design with counterflow or. Cfd modeling of heat exchanger, flow in a double pipe heat exchanger. It is an analysis of a counterflow heat exchanger, to cool the engine oil for a large industrial gas turbine engine. R sekulib university of kentucky introduction a heat exchanger is a device that is used for transfer of thermal energy enthalpy between two or more fluids, between a solid surface and a fluid, or between solid particulates and a. Flow and heat transfer analysis in tjoint, fluid structure interaction,fsi duration. Parallel and counter flow designs heat exchangers although ordinary heat exchangers may be extremely different in design and construction and may be of the single or twophase type, their modes of operation and effectiveness are largely determined. A liquidtoliquid counterflow heat exchanger is used to heat a cold fluid from 120 f to 310 f. Klingenburg counterflow plate heat exchangers recover up to 90% by rigorous calculations of existing room heat or cold.
There are a wide variety of applications for heat exchangers, for example. Double pipe heat exchangers often also referred to as double pipes are characterized by a construction form which. Both horizontal and vertical heat exchangers can be modeled. Log mean temperature difference of a counterflow heat. The use of these devices is in the building heating system, air conditioning, power generation, waste heat recovery, and so on. Due to the high heat transport capacity, heat exchanger with heat pipes has become much smaller than traditional heat exchangers in handling high heat fluxes. In ansys fluent software, how to simulate a simple 3d double pipe counterflow heat exchanger. Heat transferheat exchangers wikibooks, open books for an. It is common knowledge amongst heat exchanger designers that a counter flow heat exchanger installation is more efficient than the parallel flow alternative, but for everyone else it can be a bit of a mystery. If you need different calculator please post the request in the forum.
Pdf cfd analysis on concentric tube heat exchanger in. In this project, it has been tried to simulate and analyze a plate heat exchanger with ansys fluent. Cfd analysis on concentric tube heat exchanger in parallel. Work principle of the counter flow plate heat exchangers is very simple. In the cfd analysis of double pipe heat exchanger in counter flow arrangement, how can i calculate the wall temperature data for inner surface of inner pipe. Klingenburg energy recovery, plate heat exchangers, counterflow plate heat exchangers, optimal efficiency wherever installed. In this type of counter flow heat exchanger, two fluids flow in the opposite direction exchange heat with each other. Design process for heat exchanger and insert has been carried out in solidworks, fluid domain is formed in ansys workbench, followed by meshing in default mesh tool of ansys and solution is developed using ansys fluent software as. To analyze the heat transfer in concentric tube heat exchanger by comparing the simulation.
This is because the heat transfer plates are stopping the flow to travel in the xdirection. Simulation and cfd analysis of heat pipe heat exchanger using. A 3d developing flow and 3d conjugate heat transfer were solved using cfd software fluent 6. Mar 24, 2015 get two flow temp out based on the heat transfer and temp in. The selection software calculates the necessary technical operating data of the counterflow and is also available as standalone black box or as dll for ready integration into your. A double pipe heat exchanger consists of one pipe inside another. Software application to determine the heat balance in. In this tutorial, you learn how to simulate a heat exchanger shell and. In fluent, a conformal mesh will automatically detect wall and. Counterflow heat exchanger, find complete details about counterflow heat exchanger,counterflow heat exchanger,heat ventilation core,air exchanger core from heat exchanger supplier or manufacturerxiamen airerv technology co. The intermediate auxiliary channel is supported by transverse conducting pins. Ansys fluent heat exchanger tutorial shell and tube youtube.
Previous question next question transcribed image text from this question. Other articles where counterflow heat exchanger is discussed. Computational modeling of counter flow heat exchanger for lmtd. This makes them perfect for any ventilation system from small apartments to office complexes. Enhancement of heat transfers in counterflow plate heat exchanger due to presence of an intermediate auxiliary fluid flow is investigated. Pdf cfd analysis on concentric tube heat exchanger in parallel. Heat transfer enhancement in concentric tube heat exchanger in ansys fluent 14. The cfd analysis mainly based on the geometry modeled as per the design results. Choose a web site to get translated content where available and see local events and offers. This engineering calculator will determine a number of variables for the most common arrangements or flow paths within heat exchangers. It can be operated as a parallel flow or as a counterflow heat exchanger.
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