• No results found

Cataract Detection

N/A
N/A
Protected

Academic year: 2020

Share "Cataract Detection"

Copied!
8
0
0

Loading.... (view fulltext now)

Full text

(1)

497

Copyright © 2011-15. Vandana Publications. All Rights Reserved.

Volume-5, Issue-3, June-2015

International Journal of Engineering and Management Research

Page Number: 497-504

Performance Analysis and Optimization of Counter Flow Shell and Tube

Heat Exchanger Under Diff. Geometric Conditions Using ANSYS 15.0

Harish Sharma1, Ajay Kumar2 1

Scholar in Department of Mechanical Engineering, O.I.T.M Hisar, INDIA 2

Assistant Professor, Department of Mechanical Engineering, O.I.T.M Hisar, INDIA

ABSTRACT

Geometric dimensions of the shell and tube heat exchanger is varied and the temperature distribution is recorded at the outlet of the tubes and the shell using ANSYS 15.0 (Fluent and CFD), and thermal analysis of counter flow type shell and tube heat exchanger is done for its design and optimization.

varying Number of tubes, Diameter of tubes, Thickness of tubes. The material used for tubes is copper due to its high thermal conductivity and fluid in tubes and the shell is water. The solutions from CFD shows that keeping the no. of tubes and thickness of the tubes as constant and increasing the diameter of the tubes, the temperature is increasing at the outlet of the heat exchanger tubes, performance of the heat exchanger is decreasing by increasing the diameter of the tubes. If we are going to increase the thickness of the tube by keeping the no. of tubes same and same diameter the temperature at the outlet is decreasing hence the performance of the heat exchanger increases by increasing the thickness of the tubes, the results are discussed for 27 different cases with taking diff geometric dimensions into consideration. Heat transfer rate is decreasing with increase in number of tubes and also decreasing with increase in the diameter of the tube, but the heat transfer rate is increases with increasing the thickness of the tubes. As per the requirement of heat exchange, the geometric dimensions and no. of tubes can be calculated for getting maximum efficiency and performance of the shell and tube heat exchanger.

Keywords— Counter flow, Shell and tube heat

exchanger, CFD.

I.

INTRODUCTION

Heat exchangers are devices that used for the heat exchange between two fluids at different temperatures.

The shell and tube heat exchangers are widely used due to their ease of manufacturing, and relatively low manufacturing cost, better heat transfer rates, and low maintenance cost, shell and tube heat exchangers are available in many sizes and can adopt wide range of temperature and pressure. This study has its prime objective of obtaining the temperature distribution at the outlet of tubes and shell to conclude that what can be the best suited geometric dimensions for getting higher heat transfer rates.

(2)

498

Copyright © 2011-15. Vandana Publications. All Rights Reserved.

internal pressure, creep rupture strength, fatigue strength, hardness, thermal expansion, specific heat, tensile strength, yield strength, high melting point, ease of fabrication, and ease of joining.

II.

LITERATURE REVIEW

Ajithkumar, Ganesha, M. C. Math[1] : In this paper, an effort has made for Computational Fluid Dynamic (CFD) analysis of a single pass parallel flow Shell and Tube Heat Exchanger (STHX) with three different baffle inclinations namely 0°, 10°, and 20° for a given baffle cut of 36%. The basic geometry of shell and tube heat exchanger has made by CATIA V5. The flow and temperature fields inside the shell have studied using ANSYS-FLUENT. The heat exchanger contains 7 tubes with 600 mm length and shell diameter 90 mm. The study indicated that flow pattern in the shell side of the heat exchanger with continuous helical baffle was forced to rotate the fluid, which results in significant increase in heat transfer rate and heat transfer coefficient per unit pressure drop than segmental baffle STHX. So from this study the better option for a shell and tube heat exchanger is a helical baffle at zero degree than a segmental baffle with 10 degree baffle inclination. In segmental baffle STHX it is observed that 10° baffle inclination angle results in a reasonable pressure drop with maximum shell outlet temperature and higher heat transfer rate.

Vasiny [2]: Proposed a simplified model of shell and tube type heat exchanger using kern’s method to cool the water from 55 to 45 by using water at room temperature. And carried out steady state thermal analysis on ANSYS 14.0 and then the same has been fabricated using the exact dimensions as derived from the designing. And have tested the heat exchanger under various flow and ambient temperature conditions using the insulations of aluminium foil, cotton wool, tape, foam, paper to see its effect on the performance of the heat exchanger. Also tried to create the turbulence by closing the pump opening and observed its effect on its effectiveness. Concluded that the insulation is a good tool to increase the rate of heat transfer and cotton wool and the tape have given the best values of effectiveness. There is no any direct relation between the turbulence and effectiveness and effectiveness attains its peak at some intermediate value. The ambient conditions for which the heat exchanger was tested do not show any significant effect over the heat exchanger’s performance.

Sandeep [3]: in this paper the performance of heat exchanger is evaluated by varying the fluid flow rate and found that there is increase in pressure drop with increase in fluid flow rate in shell and tube heat exchanger which increases pumping power. Genetic algorithm provides significant improvement in the optimal designs compared to the traditional designs. It also reveals that the harmony search algorithm can converge to optimum solution with higher accuracy in comparison with genetic

algorithm. Tube pitch ratio, tube length, tube layout as well as baffle spacing ratio was found to be important design parameters which has a direct effect on pressure drop and causes a conflict between the effectiveness and total cost.

A.GopiChand [4]: Simplified model for the study of thermal analysis of shell-and-tubes heat exchangers of water and oil type is proposed by using the data that come from theoretical formulae and have designed a model of shell and tube heat exchanger using Pro-e and done the thermal analysis by using Floefd software and done the thermal analysis of water to oil type of shell and tube heat exchanger using Matlab and by using the output that come from Matlab we have modeled a shell and tube heat exchanger using Pro-e and imported this model in Floefd software and we have run the thermal analysis. By using above process we can do the thermal analysis in less time and our analysis report also most accurate.

Parmar [5]: Analyzed the performance of shell and tube type cross counter flow heat exchanger by changing the various parameters like both hot and cold fluid flow rate, direction of fluid flow. For that the mathematical model of counter flow heat exchanger is adopted and also the analysis of the heat exchanger is carried out. He concluded that we get the maximum performance (effectiveness) by decreasing the hot fluid flow and keep the cold fluid flow constant for this particular heat exchanger.

Arjun [6].: When the helix angle was varied from 00 to 200 for the heat exchanger containing 7 tubes of outer diameter 20 mm and a 600 mm long shell of inner diameter 90 mm, the simulation shows how the pressure vary in shell due to different helix angle and flow rate. This recorded an effective heat transfer hike by the impact of helical baffle in place of segmental baffle from the numerical experimentation results. The most desirable heat transfer coefficient of the highest order and pressure decline of the lowest order are the result generated in heat exchanger. The unsupported behavior of center row of tubes makes the baffle use ineffective when the baffle angle is above 200. Hence, the helix baffle inclination angle of 200 makes the best performance of shell and tube heat exchanger.

B.Jayachandriah1[7]: Design of shell and tube heat exchangers by modeling in CATIA V5, By using ANSYS software, the thermal analysis of Shell and Tube heat exchangers is carried out by varying the Tube materials. From the study of the results after performing the calculation the fluid water for bass output temperature is 310 °k which is nearer to the value mentioned in output temperature of ansys. Analysis has been done by varying the tube materials and it is found that copper material gives the better heat transfer rates than the brass material.

(3)

499

Copyright © 2011-15. Vandana Publications. All Rights Reserved.

exchanger containing segmental baffles at different orientations. Three angular orientations 0∘, 30∘, and 60∘ of the baffles were analyzed for laminar flow having the Reynolds number range 303–1516. It was observed that, with increase of Reynolds number from 303 to 1516, there was a 94.8% increase in Nusselt number, 282.9% increase in pressure drop and decrease in non-dimensional temperature factor for cold water by 57.7% and hot water by 57.1%, the heat transfer coefficient increases respectively.

Vindhya [9]: Simplified model of counter flow shell and tube type heat exchanger to cool water from 55℃ to 45℃ by water at room temperature. The design has been done using Kern’s method in order to obtain various dimensions such as shell, tubes, baffles etc. Then the steady state thermal simulation in ANSYS has been performed by applying several thermal loads on different faces and edges. Concluded by comparison that copper if applied to the whole assembly gives the best possible value of heat flux amongst the discussed materials. Secondly the outer surface of shell is generally insulated so that it may be assumed that no heat transfer is taking place in between shell and surroundings. Hence it will be a good deal to assign shell steel and tubes and baffles copper.

Chandrakant [10]: The sophisticated and user-friendly computer software using Visual Basic 6.0 (As a Programming Language) is developed for the hydraulic design of shell and tube heat exchangers based on the D.Q. Kern method by the VB programming language. This software enable the user to predict about the suitability of heat exchanger or service and it has been developed for shell and tube heat exchangers (Rating module) based on the D. Q. Kern method. Even this method helps to correct some of the parameters of the heat exchanger. TEMA tables and graphs has been incorporated. Its interactive graphics feature allows the selection of exchanger configurations and change of design conditions to be performed with ease.

Patel[11]: For the optimal design of shell-and-tube heat exchangers improved version of Genetic Algorithm named Differential Evolution (DE) is used. Design variables: tube outer diameter, tube pitch, tube length, number of tube passes, no of shell, shell head type, shell layout, baffle spacing and baffle cut are taken for optimization. Bell’s method is used to find the heat transfer area for a given design configuration. A code in C language has been developed for optimum design of shell and tube heat exchanger and it is tested and validated for analytical problems of known results. The solution to examples taken from the literature show how previously reported designs can be improved through the use of the DE technique presented in this work.

Lingala 12]: The objective of the project is to design of shell and tube heat exchanger of counter flow type using PRO E and study the temperature difference and Heat flux using ANSYS software tools. The helix

angle of helical baffle varied from 00 to 200. In simulation will show how the temperatures vary in tube with two different materials (Steel 1008 and FR-4 Epoxy). Steady state thermal analysis results are compared between two materials and conclude that FR-4 epoxy tube transfers more heat when compared to steel. Future scope can be seen by analyzing the composite materials which are having high thermal conductivity and provides efficient flow.

Shravan H [13]: In the first part of this paper, a simplified approach to design a Shell & Tube Heat Exchanger for beverage and process industry application is presented. The design was carried out by referring ASME/TEMA standards, available at the company. The design of STHE i.e. thermal and mechanical design was carried out using TEMA/ASME standards both manually and using software. It is found that design of STHE obtained by both approaches is very easy, simple, advance & less time consuming as comparing to existing method used in different Indian industries.

P.S.Gowthaman[14]: In this project, the analysis of two different baffle in a Shell and Tube Heat Exchanger done by ANSYS FLUENT. In this work a model has been developed to evaluate analysis of thermal parameters in Helical and Segmental Baffle Heat Exchanger. From the Numerical Experimentation Results it is confirmed that the Performance of a Tubular Heat Exchanger can be improved by Helical Baffles instead of Segmental Baffles. Reduces Shell side Pressure drop, pumping cost, weight, fouling. The Pressure Drop in Helical Baffle heat exchanger is appreciably lesser as Compared to Segmental Baffle heat exchanger.

Bhatt [15]: In this problem of heat transfer involved the condition where different constructional parameters are changed for getting the performance review under different condition. An excel program has been developed for the ease of calculation and obtaining result after changing different parameters. And so the design of a shell-and-tube heat exchanger usually involves a trial and error procedure. In this particular problem the tube metallurgy and baffle spacing are being changed and effect of the same on the heat transfer coefficient has been considered. Higher the thermal conductivity of the tube metallurgy higher the heat transfer rate will be achieved. Less is the baffle spacing, more is the shell side passes, higher the heat transfer but at the cost of the pressure drop.

(4)

500

Copyright © 2011-15. Vandana Publications. All Rights Reserved.

Vindhya [17]: Constructional details, design

methods and the reasons for the wide acceptance of shell and tube type heat exchangers has been described in details inside the paper. Shell & tube type heat exchangers has been given a great respect among all the classes of heat exchangers due to their virtues like comparatively large ratios of heat transfer area to volume and weight and many more. It is also shown by the literature survey that the Computational Fluid Dynamics and ANSYS. have been successfully used and implemented to secure the economy of time, materials and efforts.

III.

COMPUTATIONAL

MODELING & SOLUTIONS

Geometry modeling: The first step of the ANSYS Fluent is Geometric Modeling. The geometric dimensions used for this are described below in the table-1, in this step the diameter of the tube is 0.018m and thickness of the tube is 0.003m and the variation in the outlet temperatures has been measured.

Table-1Geometric dimensions for case 1st Parameters Description Value

Heat Exchanger Length 0.6m

Shell Inner Diameter 0.09m

Tube Outer Diameter 0.018m

Tubes Centre to Centre Spacing

0.03m

Inner Diameter of Cold Inlet and Outlet Pipe

0.04m

No. of tubes 5

Thickness of tube (m) 0.003m

Material of tube Copper

Hot fluid temp. (K)/Cold fluid temp. (K)

450/300

Hot fluid velocity (m/s)/Cold fluid velocity (m/s)

1/1

The geometric model made by using these parameters is shown below in Fig-1 the geometric model has to be fully constrained and the different domains of fluid and solid are to be distinguished and specified correctly. The 27 cases for the different geometry has been considered and the temperatures are obtained through CFD (Computational Fluid Dynamics).

Grid/Mesh generation: Mesh generation is performed in this step and named selection is done in which we have to specify the names for the different faces of inlet and outlet. The different faces or the whole geometry is divided into 4 components: cold inlet, cold

outlet, hot inlet and hot outlet, the others are solid domains as shown in Fig 2.

Fig-1: Geometric model of shell and tube heat exchanger with 5 tubes.

.

Fig-2: Meshing of shell and tube heat exchanger case 1st.

Boundary Conditions:

The Fluid Selected is “water-liquid” and copper is selected as materials for simulation. Boundary conditions are selected for inlet, outlet. In inlet 1m/s velocity and temperature is set at 300k and in outlet 1m/s velocity and 450k temperature.

(5)

501

Copyright © 2011-15. Vandana Publications. All Rights Reserved.

Fig-3: Graphical representation of run calculations

Temperature Contours:

The temperature contours shown in the Fig-4 below, as we can see and distinguish the temperature at different locations during the process of heat exchanger in running condition, the color wise distribution of temperature is shown in the picture. The temperature contours are taken at all locations: Cold inlet, Hot inlet, Cold outlet, Hot outlet, Shell and the solid tube walls. And we have got different temperature at every point through CFD, as heat transfer is going on during the process, heat transferring from hot water to cold water in the heat exchanger and we can find out the average temperature at cold outlet and average temperature at hot outlet, and can analyze the rate of heat transfer.

Fig-4: Pic. Representation of temperature contours at diff. points.

IV.

RESULTS & DISCUSSION

Here the 27 cases has been discussed with different geometric dimensions in which the no. of tubes, diameter and thickness varied and the temperature at the different points has been taken and analyzed and a graph has been generated at the cold outlet and hot outlet points. The diameter, thickness and no. of tubes for the 27 cases are given in the table-2 below:

Table-2 Geometric dimensions for 27 cases (1st to 27th)

Variable parameters of Shell & tube heat exchanger

S.No Case no.

No. of tubes

Dia of tube (m)

Thickness of tube (m)

1 1st 5 0.018 0.003

2 2nd 5 0.02 0.003

3 3rd 5 0.022 0.003

4 4th 5 0.02 0.001

5 5th 5 0.02 0.002

6 6th 5 0.018 0.001

7 7th 5 0.018 0.002

8 8th 5 0.022 0.002

9 9th 5 0.022 0.001

10 10th 7 0.018 0.003

11 11th 7 0.02 0.003

12 12th 7 0.022 0.003

13 13th 7 0.02 0.001

14 14th 7 0.02 0.002

15 15th 7 0.018 0.001

16 16th 7 0.018 0.002

17 17th 7 0.022 0.002

18 18th 7 0.022 0.001

19 19th 9 0.018 0.003

20 20th 9 0.02 0.003

21 21st 9 0.022 0.003

22 22nd 9 0.02 0.001

23 23rd 9 0.02 0.002

24 24th 9 0.018 0.001

25 25th 9 0.018 0.002

26 26th 9 0.022 0.002

27 27th 9 0.022 0.001

(6)

502

Copyright © 2011-15. Vandana Publications. All Rights Reserved.

the Centre point of the tube. At this point we always get maximum temperature throughout the cross-section of the tube, and cold outlet temperature is measured at the Centre point of the cold outlet pipe, the Centre point of the shell length is taken inside the tube and temperature at these three points are analyzed. The temperature will be maximum at these three points throughout the cross-section of the tube or the pipe.

Temperatures at three points are given in the table-3 below:

Table-3 Average temperature for 27 cases (1st to 27th)

Average temperature at different points

Case no.

Temp. at hot outlet

(K)

Temp. at cold outlet

(K)

Temp. at centre of shell

length (K)

1st 407.28 347.46 437.73

2nd 421.02 348.37 442.82

3rd 429.28 349.67 444.48

4th 430.61 351.23 445.13

5th 421.69 350.72 442.80

6th 423.63 350.26 443.88

7th 411.58 347.89 439.54

8th 431.86 350.15 445.64

9th 432.84 349.51 446.03

10th 405.90 354.65 439.07

11th 424.51 355.04 443.80

12th 431.56 354.22 445.26

13th 433.28 355.33 446.01

14th 427.32 352.22 443.76

15th 425.29 359.73 444.46

16th 411.49 353.30 440.72

17th 433.96 352.71 446.27

18th 436.22 355.20 446.72

19th 411.43 374.17 440.62

20th 426.50 379.21 444.43

21st 436.90 393.24 446.65

22nd 434.78 383.76 446.62

23rd 429.30 381.53 444.54

24th 428.73 378.80 445.64

25th 418.22 375.74 442.42

26th 436.31 397.83 447.37

27th 439.30 402.50 447.63

Effect of variation of geometry:

The variation of diameter and thickness has been discussed above by keeping the no. of tubes same. Now we are going to check the results for the variation in no. of tubes.

The following conclusions can be made after analysis of these 27 cases for the variation of number of tubes by keeping all other things fixed:

• Considering 1st, 10th and 19th case the no. of tubes are increased step wise 5 in 1st case, 7 in 10th case and 9 in 19th case by keeping the thickness 0.003m and diameter 0.018m in all three cases, the temperature at the hot outlet is decreased from 407.28K in 1st case to 405.90K in 10th case then again increase to 411.43K in 19th case. Hence at this particular thickness and diameter of the tube the temperature is decreasing if we go for 7 no. of tubes instead of 5. But increases again if we are going for the 9 no. of tubes instead of 5 and 7. By increasing no. of tubes from 5 to 7 the temperature is decreasing because the surface area of contact between hot and cold fluid is increased by increasing the no. of tubes, and the temperature is increasing by increasing the no. of tubes from 7 to 9 because this change makes the shell area comparatively smaller as we are not increasing the shell diameter or shell length, So, due to small area for contact of hot and cold fluid make the temperature increase.

• Considering 2nd, 11th and 20th case the no. of tubes are increased step wise 5 in 2nd case, 7 in 11th case and 9 in 20th case by keeping the thickness 0.003m and diameter 0.02m in all three cases, the temperature at the hot outlet is increased from 421.028K in 2nd case to 424.517K in 11th case then again increase to 426.503K in 20th case. Hence at this particular thickness and diameter the temperature is increasing if we go for 7 no. of tubes instead of 5. And also increases again if we are going for the 9 no. of tubes instead of 5 and 7. By increasing no. of tubes from 5 to 7 and 7 to 9 the temperature is increasing.

(7)

503

Copyright © 2011-15. Vandana Publications. All Rights Reserved.

of tubes from 5 to 7 and 7 to 9 the temperature is increasing.

• Considering 4th, 13th and 22nd case the no. of tubes are increased step wise 5 in 4th case, 7 in 13th case and 9 in 22nd case by keeping the thickness 0.001m and diameter 0.02m in all three cases, the temperature at the hot outlet is decreased from 430.609K in 4th case to 433.283K in 13th case then again increase to 436.903K in 22nd case. Hence at this particular thickness and diameter the temperature is increasing if we go for 7 no. of tubes instead of 5. And also increases again if we are going for the 9 no. of tubes instead of 5 and 7. By increasing no. of tubes from 5 to 7 and 7 to 9 the temperature is increasing.

• Considering 5th, 14th and 23rd case the no. of tubes are increased step wise 5 in 5th case, 7 in 14th case and 9 in 23rd case by keeping the thickness 0.002m and diameter 0.02m in all three cases, the temperature at the hot outlet is decreased from 421.69K in 5th case to 427.40K in 14th case then again increase to 429.30K in 23rd case. Hence at this particular thickness and diameter the temperature is increasing if we go for 7 no. of tubes instead of 5. And also increases again if we are going for the 9 no. of tubes instead of 5 and 7. By increasing no. of tubes from 5 to 7 and 7 to 9 the temperature is increasing.

• Considering 6th, 15th and 24th case the no. of tubes are increased step wise 5 in 6th case, 7 in 15th case and 9 in 24th case by keeping the thickness 0.001m and diameter 0.018m in all three cases, the temperature at the hot outlet is decreased from 423.631K in 6th case to 425.29K in 15th case then again increase to 428.734K in 24th case. Hence at this particular thickness and diameter the temperature is increasing if we go for 7 no. of tubes instead of 5. And also increases again if we are going for the 9 no. of tubes instead of 5 and 7. By increasing no. of tubes from 5 to 7 and 7 to 9 the temperature is increasing.

• Considering 7th, 16th and 25th case the no. of tubes are increased step wise 5 in 7th case, 7 in 16th case and 9 in 25th case by keeping the thickness 0.002m and diameter 0.018m in all three cases, the temperature at the hot outlet is decreased from 411.585K in 7th case to 411.49K in 16th case then again increase to 418.225K in 25th case. Hence at this particular thickness and diameter the temperature is increasing if we go for 7 no. of tubes instead of 5. And also increases again if we are going for the 9 no. of tubes instead of 5 and 7. By increasing no. of tubes from 5 to 7 and 7 to 9 the temperature is increasing.

• Considering 8th, 17th and 26th case the no. of tubes are increased step wise 5 in 8th case, 7 in

17th case and 9 in 26th case by keeping the thickness 0.002m and diameter 0.022m in all three cases, the temperature at the hot outlet is decreased from 431.867K in 8th case to 433.961K in 17th case then again increase to 436.317K in 26th case. Hence at this particular thickness and diameter the temperature is increasing if we go for 7 no. of tubes instead of 5. And also increases again if we are going for the 9 no. of tubes instead of 5 and 7. By increasing no. of tubes from 5 to 7 and 7 to 9 the temperature is increasing.

• Considering 9th, 18th and 27th case the no. of tubes are increased step wise 5 in 9th case, 7 in 18th case and 9 in 27th case by keeping the thickness 0.001m and diameter 0.022m in all three cases, the temperature at the hot outlet is decreased from 432.848K in 9th case to 436.227K in 18th case then again increase to 439.3K in 27th case. Hence at this particular thickness and diameter the temperature is increasing if we go for 7 no. of tubes instead of 5. And also increases again if we are going for the 9 no. of tubes instead of 5 and 7. By increasing no. of tubes from 5 to 7 and 7 to 9 the temperature is increasing.

Hence the heat transfer rate is decreasing with increase in number of tubes and also decreasing with increase in the diameter of the tube, but the heat transfer rate is increases with increasing the thickness of the tubes.

V.

CONCLUSION

From the Computational modeling and simulations of the 27 cases and the temperature distribution at different it can be concluded that:

1. If we keep the no. of tubes and thickness as constant and increasing the diameter of the tubes the temperature is increasing at the outlet of the heat exchanger in every case, performance of the heat exchanger is decreasing by increasing the diameter of the tubes.

2. If we are going to increase the thickness of the tube by keeping the no. of tubes and the diameter constant the temperature at the outlet is decreasing hence the performance of the heat exchanger is increasing by increasing the thickness of the tubes.

3. If we increase the number of tubes the temperature is increasing at the outlet of the heat exchanger in every case, performance of the heat exchanger is decreasing by increasing the number of tubes.

(8)

504

Copyright © 2011-15. Vandana Publications. All Rights Reserved.

REFRENCES

[1] Ajithkumar M.S., Ganesha T, M. C. Math, “CFD Analysis to Study the Effects of Inclined Baffles on Fluid Flow in a Shell and Tube Heat Exchanger” International Journal of Research in Advent Technology, Vol.2, No.7, July 2014, E-ISSN: 2321-9637.

[2] Parmar Kalpesh, D Prof. Manoj Chopra, “Performance Analysis Of Cross Counter Flow Shell And Tube Heat Exchanger By Experimental Investigation & Mathematical Modelling”, International Journal of Engineering Research & Technology (IJERT), ISSN: 2278-0181, IJERTV2IS70097, Vol. 2 Issue 7, July – 2013.

[3] A.GopiChand, A. V. N. L. Sharma, G. Vijay Kumar, A.Srividya, “Thermal analysis of shell and tube heat exchanger using MAT LAB and Floefd software” International Journal of Research in Engineering and Technology ISSN: 2319-1163 Volume: 01 Issue: 03 | Nov-2012.

[4] Vindhya Vasiny Prasad Dubey, Raj Rajat Verma, Piyush Shanker Verma, A.K.Srivastava, “Performance Analysis of Shell & Tube Type Heat Exchanger under the Effect of Varied Operating Conditions”, IOSR Journal of Mechanical and Civil EngineeringVolume 11, Issue 3 Ver. VI (May- Jun. 2014), PP 08-17.

[5] Sandeep K. Patel, Professor Alkesh M. Mavani, “Shell & tube heat exchanger thermal design with optimization of mass flow rate and baffle spacing” International Journal of Advanced Engineering Research and Studies, Vol. II/ Issue I/Oct.-Dec.,2012.

[6] Arjun K.S. and Gopu K.B., “Design of Shell and Tube Heat Exchanger Using Computational Fluid Dynamics Tools” Research Journal of Engineering Sciences ISSN 2278 – 9472 Vol. 3(7), 8-16, July (2014) Res. J. Engineering Sci.

[7] B.Jayachandriah1, K. Rajasekhar, “Thermal Analysis of Tubular Heat Exchangers Using ANSYS”, International Journal of Engineering Research ISSN:2319-6890, Volume No.3 Issue No: Special 1, pp: 21-25, 22nd March 2014.

[8] Amarjit Singh and Satbir S. Sehgal, “Thermo hydraulic Analysis of Shell-and-Tube Heat Exchanger with Segmental Baffles” Hindawi Publishing Corporation Volume 2013, Article ID 548676, 5 pages, ISRN Chemical Engineering, 1 August 2013.

[9] Vindhya Vasiny Prasad Dubey, Raj Rajat Verma, Piyush Shanker Verma & A. K. Srivastava, “Steady State Thermal Analysis of Shell and Tube Type Heat Exchanger to Demonstrate the Heat Transfer Capabilities of Various Thermal Materials using Ansys” Global Journal of Researches in Engineering, Volume 14 Issue 4 Version 1.0 Year 2014.

[10] Chandrakant B. Kothare, “Shell and tube heat exchanger design by VB Language for education purpose”

International Journal of Modern Engineering Research (IJMER), Vol.1, Issue2, pp-652-657, ISSN: 2249-6645. [11] Ankit R. Patel, “Design and optimization of Shell and Tube Heat Exchanger” INDIAN JOURNAL OF APPLIED RESEARCH, Volume: 3 | Issue: 8 | Aug 2013 | ISSN - 2249-555X.

[12] Lingala Vijaya Sekhar, Bapiraju Bandam, “Design and Thermal Analysis of Heat Exchanger with Two Different Materials” International Journal & Magazine of Engineering, Technology, Management and Research, Volume No: 1(2014), Issue No: 12, December 2014. [13] Shravan H. Gawande, Sunil D. Wankhede, Rahul N. Yerrawar, Vaishali J. Sonawane, Umesh B. Ubarhande, “Design and Development of Shell & Tube Heat Exchanger for Beverage” Modern Mechanical Engineering, 2012, 2, 121-125.

[14] P.S..Gowthaman and S. Sathish, “Analysis of Segmental and Helical Baffle in Shell and tube Heat Exchanger” International Journal of Current Engineering and Technology, Special Issue-2 Feb 2014.

[15] Durgesh Bhatt, Priyanka M Javhar “Shell and Tube Heat Exchanger Performance Analysis” International Journal of Science and Research (IJSR), Volume 3 Issue 9, September 2014.

[16] Paresh Patel, Amitesh paul, “Thermal Analysis Of Tubular Heat Exchanger By Using Ansys” International Journal of Engineering Research & Technology (IJERT), Vol. 1 Issue 8, October – 2012.

References

Related documents

This paper will focus on the techniques used to embed malicious traffic within DNS packets, it will detail our experimental setup using a freely available tool for covert

Az elsõ modell szerint az SWHS és az SWLS-H összesen tíz tétele egyetlen általános elégedettség faktor kifeje- zõdése, míg a második modell szerint az élettel

The corona radiata consists of one or more layers of follicular cells that surround the zona pellucida, the polar body, and the secondary oocyte.. The corona radiata is dispersed

A written, signed complaint concerning a violation of any law, mis- management, a gross waste of monies, or an abuse of authority can be a “whistleblower” disclosure. Arizona

Results obtained from the research showed a mean value for the innovation climate-instrument of 3.83 indicating a high innovation climate for the Slovenian

From these luminosity functions we have shown that early galaxy formation occurred in large bright galaxies and has systematically shifted to fainter galaxies as the universe aged..

conflict health reform would include comparative methods - for example, a 'structured focused comparison' where two or more case studies of post-conflict health reform would