The document outlines a 14-step process for manually designing a shell and tube heat exchanger using the Kern method. Key steps include: 1) obtaining thermo-physical properties of fluids, 2) performing an energy balance to determine heat duty, 3) assuming an overall heat transfer coefficient, 4) deciding tube passes and calculating the log mean temperature difference, 5) calculating required heat transfer area, 6) selecting tube materials and dimensions, 7) deciding exchanger type and tube pitch, 8) assigning fluids and selecting baffles, 9) calculating heat transfer coefficients, 10) checking the calculated overall heat transfer coefficient, 11) recalculating as needed, 12) calculating overdesign, 13) calculating pressure drops, and 14)
Selection and Design of Condensers
0 INTRODUCTION/PURPOSE
1 SCOPE
2 FIELD OF APPLICATION
3 DEFINITIONS
4 CHOICE OF COOLANT
5 LAYOUT CONSIDERATIONS
5.1 Distillation Column Condensers
5.2 Other Process Condensers
6 CONTROL
6.1 Distillation Columns
6.2 Water Cooled Condensers
6.3 Refrigerant Condensers
7 GENERAL DESIGN CONSIDERATIONS
7.1 Heat Transfer Resistances
7.2 Pressure Drop
7.3 Handling of Inerts
7.4 Vapor Inlet Design
7.5 Drainage of Condensate
8 SUMMARY OF TYPES AVAILABLE
8.1 Direct Contact Condensers
8.2 Shell and Tube Exchangers
8.3 Air Cooled Heat Exchangers
8.4 Spiral Plate Heat Exchangers
8.5 Internal Condensers
8.6 Plate Heat Exchangers
8.7 Plate-Fin Heat Exchangers
8.8 Other Compact Designs
9 BIBLIOGRAPHY
FIGURES
1 DIRECT CONTACT CONDENSER WITH INDIRECT COOLER FOR RECYCLED CONDENSATE
2 SPRAY CONDENSER
3 TRAY TYPE CONDENSER
4 THREE PASS TUBE SIDE CONDENSER WITH INTERPASS LUTING FOR CONDENSATE DRAINAGE
5 CROSS FLOW CONDENSER WITH SINGLE PASS COOLANT
This presentation describes the considerations involved in selecting the shell and tube exchanger according to TEMA Designations. Also, it helps to identify whether fluid should be sent tube side or shell side
Selection and Design of Condensers
0 INTRODUCTION/PURPOSE
1 SCOPE
2 FIELD OF APPLICATION
3 DEFINITIONS
4 CHOICE OF COOLANT
5 LAYOUT CONSIDERATIONS
5.1 Distillation Column Condensers
5.2 Other Process Condensers
6 CONTROL
6.1 Distillation Columns
6.2 Water Cooled Condensers
6.3 Refrigerant Condensers
7 GENERAL DESIGN CONSIDERATIONS
7.1 Heat Transfer Resistances
7.2 Pressure Drop
7.3 Handling of Inerts
7.4 Vapor Inlet Design
7.5 Drainage of Condensate
8 SUMMARY OF TYPES AVAILABLE
8.1 Direct Contact Condensers
8.2 Shell and Tube Exchangers
8.3 Air Cooled Heat Exchangers
8.4 Spiral Plate Heat Exchangers
8.5 Internal Condensers
8.6 Plate Heat Exchangers
8.7 Plate-Fin Heat Exchangers
8.8 Other Compact Designs
9 BIBLIOGRAPHY
FIGURES
1 DIRECT CONTACT CONDENSER WITH INDIRECT COOLER FOR RECYCLED CONDENSATE
2 SPRAY CONDENSER
3 TRAY TYPE CONDENSER
4 THREE PASS TUBE SIDE CONDENSER WITH INTERPASS LUTING FOR CONDENSATE DRAINAGE
5 CROSS FLOW CONDENSER WITH SINGLE PASS COOLANT
This presentation describes the considerations involved in selecting the shell and tube exchanger according to TEMA Designations. Also, it helps to identify whether fluid should be sent tube side or shell side
Shell and Tube Heat Exchangers Using Cooling Water
0 INTRODUCTION/PURPOSE
1 SCOPE
2 FIELD OF APPLICATION
3 DEFINITIONS
3.1 HTFS
3.2 TEMA
4 CHECKLIST
5 QUALITY OF COOLING WATER
6 COOLING WATER ON SHELL SIDE OR TUBE SIDE
7 COOLING WATER ON THE SHELL SIDE
7.1 Baffle Spacing
7.2 Impingement Plates
7.3 Horizontal or Vertical Shell Orientation
7.4 Baffle Cut Orientation
7.5 Sludge Blowdown
7.6 Removable Bundles
8 FOULING RESISTANCES AND LIMITING TEMPERATURES
9 PRESSURE DROP
9.1 Pressure Drop Restrictions
9.2 Fouling and Pressure Drop
9.3 Elevation of a Heat Exchanger in the Plant
10 MATERIALS OF CONSTRUCTION
11 WATER VELOCITY
11.1 Low Water Velocity
11.1.1 Tube Side Water Flow
11.1.2 Shell Side Water Flow
11.2 High Water Velocity
12 ECONOMICS
13 DIRECTION OF WATER FLOW
14 VENTS AND DRAINS
15 CONTROL
15.1 Operating Variables
15.2 Heat Load Control
15.2.1 General
15.2.2 Heat load control by varying cooling water flow
15.3 Orifice Plates
16 MAINTENANCE
CENTRIFUGAL COMPRESSOR SETTLE OUT CONDITIONS TUTORIALVijay Sarathy
Centrifugal Compressors are a preferred choice in gas transportation industry, mainly due to their ability to cater to varying loads. In the event of a compressor shutdown as a planned event, i.e., normal shutdown (NSD), the anti-surge valve is opened to recycle gas from the discharge back to the suction (thereby moving the operating point away from the surge line) and the compressor is tripped via the driver (electric motor or Gas turbine / Steam Turbine). In the case of an unplanned event, i.e., emergency shutdown such as power failure, the compressor trips first followed by the anti-surge valve opening. In doing so, the gas content in the suction side & discharge side mix.
Therefore, settle out conditions is explained as the equilibrium pressure and temperature reached in the compressor piping and equipment volume following a compressor shutdown
This presentation was created to provide a quick refresher to single-phase fluid flow line sizing. The content of this presentation was obtained from various literature (handbooks and website).
Please provide your comments
technical knowledge about boilers power generation through steam and types of boilers in the chemical process industries. Mechanical and chemical engineers should have complete technical knowledge about boilers and its applications.
Shell and Tube Heat Exchangers Using Cooling Water
0 INTRODUCTION/PURPOSE
1 SCOPE
2 FIELD OF APPLICATION
3 DEFINITIONS
3.1 HTFS
3.2 TEMA
4 CHECKLIST
5 QUALITY OF COOLING WATER
6 COOLING WATER ON SHELL SIDE OR TUBE SIDE
7 COOLING WATER ON THE SHELL SIDE
7.1 Baffle Spacing
7.2 Impingement Plates
7.3 Horizontal or Vertical Shell Orientation
7.4 Baffle Cut Orientation
7.5 Sludge Blowdown
7.6 Removable Bundles
8 FOULING RESISTANCES AND LIMITING TEMPERATURES
9 PRESSURE DROP
9.1 Pressure Drop Restrictions
9.2 Fouling and Pressure Drop
9.3 Elevation of a Heat Exchanger in the Plant
10 MATERIALS OF CONSTRUCTION
11 WATER VELOCITY
11.1 Low Water Velocity
11.1.1 Tube Side Water Flow
11.1.2 Shell Side Water Flow
11.2 High Water Velocity
12 ECONOMICS
13 DIRECTION OF WATER FLOW
14 VENTS AND DRAINS
15 CONTROL
15.1 Operating Variables
15.2 Heat Load Control
15.2.1 General
15.2.2 Heat load control by varying cooling water flow
15.3 Orifice Plates
16 MAINTENANCE
CENTRIFUGAL COMPRESSOR SETTLE OUT CONDITIONS TUTORIALVijay Sarathy
Centrifugal Compressors are a preferred choice in gas transportation industry, mainly due to their ability to cater to varying loads. In the event of a compressor shutdown as a planned event, i.e., normal shutdown (NSD), the anti-surge valve is opened to recycle gas from the discharge back to the suction (thereby moving the operating point away from the surge line) and the compressor is tripped via the driver (electric motor or Gas turbine / Steam Turbine). In the case of an unplanned event, i.e., emergency shutdown such as power failure, the compressor trips first followed by the anti-surge valve opening. In doing so, the gas content in the suction side & discharge side mix.
Therefore, settle out conditions is explained as the equilibrium pressure and temperature reached in the compressor piping and equipment volume following a compressor shutdown
This presentation was created to provide a quick refresher to single-phase fluid flow line sizing. The content of this presentation was obtained from various literature (handbooks and website).
Please provide your comments
technical knowledge about boilers power generation through steam and types of boilers in the chemical process industries. Mechanical and chemical engineers should have complete technical knowledge about boilers and its applications.
Shell & tube heat exchanger single fluid flow heat transferVikram Sharma
This article was produced to highlight the fundamentals of single-phase heat exchanger rating using Kern's method. The content is strictly academic with no reference to industrial best practices.
Thermal rating of Shell & Tube Heat ExchangerVikram Sharma
This presentation file was created with the objective to provide a refresher course on the thermal rating of Shell and Tube heat exchanger for single-phase heat transfer
Optimization of Air Preheater for compactness of shell by evaluating performa...Nemish Kanwar
Designing of an Air Preheater with increased performance from an existing design through alteration in baffle placement. Analysis of 4 Baffle designs for segmented Baffle case was done using Ansys Fluent. The net heat recovery rate was computed by subtracting pump work from heat recovered. Based on the result, Air Preheater design was recommended.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
2. Process (Thermal) Design Procedure
Shell and tube heat exchanger is designed by trial and error calculations. The main steps
of design following the Kern method are summarized as follows:
Step #1.
Obtain the required thermo physical properties of hot and cold fluids at the caloric
temperature or arithmetic mean temperature.
Calculate these properties at the caloric temperature if the variation of viscosity with
temperature is large.
Step #2.
Perform energy balance and find out the heat duty () of the exchanger.
Step #3.
Assume a reasonable value of overall heat transfer coefficient (Uo,assm). The value of
Uo,assm with respect to the process hot and cold fluids can be taken from the books
(Kern, page 840 Table 8; )
avpatil159@gmail.com
3. Process (Thermal) Design Procedure
Step #4.
Decide tentative number of shell and tube passes ( ).
Determine the LMTD and the correction factor FT ([KERN] page 828-833 Figs. 18-23;
FT normally should be greater than 0.75 for the steady operation of the exchangers.
Otherwise it is required to increase the number of passes to obtain higher FT values.
Step #5. Calculate heat transfer area (A) required:
avpatil159@gmail.com
4. Process (Thermal) Design Procedure
Step #6.
Select tube material, decide the tube diameter (ID=di, OD =do ), its wall thickness
and tube length ( L ).
Calculate the number of tubes (nt ) required to provide the heat transfer area (A):
Calculate Tube side velocity,
Where, m, ρ and μ are mass flow rate, density and viscosity of tube side fluid.
However, this is subject to allowable pressure drop in the tube side of the heat
exchanger.
avpatil159@gmail.com
5. Process (Thermal) Design Procedure
Step #7.
Decide type of shell and tube exchanger (fixed tubesheet, U-tube etc.).
Select the tube pitch (PT), determine inside shell diameter (Ds) that can
accommodate the calculated number of tubes (nt). Use the standard
tube counts table for this purpose. Tube counts are available in
standard text books ([KERN] page 841-842 Table 9)
Step #8.
Assign fluid to shell side or tube side. Select the type of baffle (segmental
etc.), its size (i.e. percentage cut, 25% baffles are widely used), spacing ( B
) and number. The baffle spacing is usually chosen to be within 0.2 Ds to
Ds.
avpatil159@gmail.com
6. Process (Thermal) Design Procedure
Step #10.
Determine the tube side film heat transfer coefficient (hi) using the suitable form of
Sieder-Tate equation in laminar and turbulent flow regimes.
Estimate the shell-side film heat transfer coefficient (ho ) from:
Select the outside tube (shell side) dirt factor ( Rdo) and inside tube (tube side) dirt
factor (Rdi ) ([KERN] page 845 Table 12)
Calculate overall heat transfer coefficient (Uo,cal) based on the outside tube area (you
may neglect the tube-wall resistance) including dirt factors:
avpatil159@gmail.com
7. Process (Thermal) Design Procedure
Step #11
go the next step # 12. Otherwise go to step #5,
calculate heat transfer area (A) required using Uo,cal and repeat the calculations starting
from step #5.
If the calculated shell side heat transfer coefficient ( ho ) is too low, assume closer baffle
spacing ( B ) close to 0.2 Ds and recalculate shell side heat transfer coefficient.
However, this is subject to allowable pressure drop across the heat exchanger.
Step #12.
Calculate % overdesign. Overdesign represents extra surface area provided beyond that
required to compensate for fouling. Typical value of 10% or less is acceptable.
avpatil159@gmail.com
8. Process (Thermal) Design Procedure
Step #13.
Calculate the tube-side pressure drop (∆PT): (i) pressure drop in the straight section of
the tube (frictional loss) (∆Pt) and (ii) return loss (∆Prt ) due to change of direction of
fluid in a „multi-pass exchanger‟.
Total tube side pressure drop:
Step #14.
Calculate shell side pressure drop (∆PS): (i) pressure drop for flow across the tube
bundle (frictional loss) (∆Ps ) and (ii) return loss (∆Prs) due to change of direction of
fluid.
Total shell side pressure drop:
If the tube-side pressure drop exceeds the allowable pressure drop for the process
system, decrease the number of tube passes or increase number of tubes per pass. Go
back to step #6 and repeat the calculations steps.
If the shell-side pressure drop exceeds the allowable pressure drop, go back to step #7
and repeat the calculations steps.
avpatil159@gmail.com