HTFS USER GUIDE

HTFS V7.3
User Guide
Copyright
Version Number: V7.3 March 2011
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This document is intended as a guide to using AspenTech's software. This
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Related Documentation
In addition to online help systems available via the product applications, a
number of printable documents are provided to help users learn and use the
HTFS family of products:
Title
Content
HTFS Installation Guide.pdf
Describes the installation routine
HTFS User Guide.pdf
Provides an overview of the HTFS
family of products
ACOL Reference Guide.pdf
User instructions for the ACOL product
ACOL Getting Started Guide.pdf
APLE Reference Guide.pdf
User instructions for the APLE product
APLE Getting Started Guide.pdf
MUSE Reference Guide.pdf
MUSE Getting Started Guide.pdf
FIHR Reference Guide.pdf
User instructions for the MUSE
product
User instructions for the FIHR product
FIHR Getting Started Guide.pdf
FRAN Reference Guide.pdf
User instructions for the FRAN product
FRAN Getting Started Guide.pdf
PIPE Reference Guide.pdf
User instructions for the PIPE product
PIPE Getting Started Guide.pdf
TASC Thermal Reference Guide.pdf
TASC Thermal Getting Started Guide.pdf
TASC Mechanical Reference Guide.pdf
TASC Mechanical Getting Started Guide.pdf
User instructions for the TASC
Thermal product
User instructions for the TASC
Mechanical product
Introduction
Introducing HTFS
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1 Introducing HTFS
1.1 The HTFS Family of Products.........................................................3
1.2 HTFS Programs................................................................................4
1.2.1 The Main HTFS Programs .......................................................4
1.2.2 Functionality .............................................................................4
1.2.3 Physical Properties...................................................................5
1.3 TASC Thermal ..................................................................................6
1.4 TASC Mechanical .............................................................................8
1.5 ACOL...............................................................................................10
1.6 MUSE ..............................................................................................12
1.7 FIHR ................................................................................................14
1.8 APLE ...............................................................................................16
1.9 PIPE.................................................................................................18
1.10 FRAN.............................................................................................20
1.11 Back-up for HTFS Programs.......................................................22
1.11.1 Documentation .....................................................................22
1.11.2 Research ..............................................................................22
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Introducing
Introducing HTFS
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1.1 The HTFS Family of Products
At AspenTech, our business is helping the process industries improve
their productivity and profitability through process understanding. In
heat exchanger thermal design, this means HTFS, an unparalleled suite
of research-validated software. The quality of HTFS is recognised by
leading companies worldwide who rely on the methods developed and
supported by a unique team of heat transfer experts.
HTFS software is based on over 30 years of industrially-led in-house
research aimed at reducing the cost of design, manufacture and
operation of heat transfer equipment. Application of these accurate,
proven solutions, equipment can be confidently designed with less heat
transfer area and better pressure drop performance, bringing reductions
in material and manufacturing costs, as well as savings in plant
operation and production. For those users who need to quality assure
calculation methods and validation, HTFS provides access to underlying
methods through membership of the HTFS Research Network.
HTFS is committed to providing easy-to-use products that unlock the
full potential of heat transfer specialist, process engineer in design or
operational environments. HTFS software comes complete with
extensive screen based help, on-line program manuals and global
support, so you are assured of an immediate, trouble-free HTFS
solution. HTFS software is developed to ISO9001 (BS5750 Part 1) and
ISO9000-3 (BS5750 Part 13 - TickIT).
Getting the best return from your investments in process engineering
software requires long term compatibility between all the tools used by
your company’s design teams. HTFS software is PC-based, operating
under Windows (2000 or XP) and is network compatible. It can be run in
conjunction with the HYSYS process simulation software from
Hyprotech and also has interfaces to third party property databanks,
software from Aspen Technology Inc., and Simulation Sciences Inc.,
Autodesk’s AutoCAD and the Icarus Process Evaluator System (IPM). In
addition users can benefit by “cut & paste” data exchange with most
Windows business applications.
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HTFS Programs
1.2 HTFS Programs
1.2.1 The Main HTFS Programs
HTFS has seven main programs, each for a different type of equipment.
TASC:
Shell and tube heat exchangers
ACOL:
Air coolers and other crossflow exchangers
FIHR:
Furnaces and fired heaters
MUSE:
Plate-fin heat exchangers
APLE:
Plate heat exchangers
FRAN:
Boiler feedwater heaters
PIPE:
Unbranched pipework
1.2.2 Functionality
The main HTFS programs all offer some or all of the following basic
functionality:
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DESIGN - for cost or area optimised thermal design to your
specified process conditions and geometrical constraints.
CHECKING - to check whether a given exchanger will achieve
the required duty for your specified inlet and outlet conditions,
giving the ratio of the actual to required surface area.
SIMULATION - to calculate the outlet conditions and performance
of a given exchanger from your specified inlet conditions.
THERMOSYPHON - to calculate the performance of a vertical or
horizontal thermosyphon reboiler, the circulation rate, and the
pipework pressure drops.
Introducing HTFS
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1.2.3 Physical Properties
HTFS programs contain the COMThermo properties databank, with
1000+ components, and a choice of methods for vapour-liquid
equilibrium and fluid properties calculations. Properties data can be set
up and reviewed prior to the main flow and heat exchange calculations.
Subsidiary properties facilities available include the 40-component
NEL40 databank, which can be used in conjunction with any
component for which you provide data, and options to store and recover
stream properties in your own databank.
HTFS programs can import process and properties data from all the
main process simulators. You can also set up a facility whereby you can
access and generate data from your company’s own properties data
software, while running an HTFS program.
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TASC Thermal
1.3 TASC Thermal
Shell and Tube Heat Exchangers
The TASC program gives you powerful capabilities for a wide range of
exchanger applications, including condensers, condensers with
desuperheating and cooling, multi-component partial condensers,
reboilers, falling film evaporators and multi-shell, multi-phase feedeffluent trains.
Figure 1.1TASC Thermal
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Introducing HTFS
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Functionality
The basic TASC Thermal calculations are
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DESIGN
CHECKING
SIMULATION
THERMOSYPHONS
GEOMETRY ONLY
The Simulation option in TASC is of extended form permitting either
inlet conditions, or outlet conditions or flowrate to be calculated (for
either stream) given the other two parameters.
Technical Summary
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Multi-shell capability with up to 12 shells in series and any
number in parallel.
TEMA, E, F, G, H, J, K and X shells.
Double pipe and multi-tube hairpin exchangers.
Tube Layout optimisation.
Graphical input to customise Tube Layout.
Plain or low fin tubes, longitudinally finned tubes.
Low fin tube database.
Single and double segmental baffles, no tubes in window, rod
baffles and unbaffled units.
Vibration analysis; flow stability checks for thermosyphons.
Input in SI, metric or US customary (British) units.
Versatile interface between TASC and the HYSYS process
simulator.
Import from HYSIM, ASPEN PLUS or other process simulators.
Setting Plan and TEMA sheet output; optional TEMA style input.
Budget costing package - customise to your own labour and
materials costs.
Specify f and j factors for enhanced tubeside or shellside
surfaces.
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TASC Mechanical
1.4 TASC Mechanical
Shell and Tube Heat Exchangers
TASC Mechanical (formerly MECHX) is a fully integrated extension to
TASC, for mechanical design of shell and tube heat exchangers.
Figure 1.2TASC Mechanical
Functionality
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DESIGN - for calculation of new equipment
CHECKING - for re-rating of existing equipment
Introducing HTFS
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Technical Summary
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TASC Mechanical is designed to manage the interaction of the
thermal and mechanical design activities through a
comprehensive data review facility.
Easy data transfer Thermal to Mechanical and Mechanical to
Thermal for a consistent solution.
ASME VIII Division 1 (2001 Edition & 1st July 2002 Addenda) Internal and external pressure.
ASME II Part D (2001 Edition & 1st July 2002 Addenda) - On-line
materials database.
PD5500 (2003 Edition) Internal Pressure
BS-Online Materials database
WRC-107 (1979 Revision) - Local Stresses in spherical and
cylindrical shells due to external Loadings.
TEMA (Eighth Edition) - Tubesheets, bolted cover deflection.
Output
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Calculation Report - Including front and index sheet.
Bill of Materials - User defined item numbers, materials,
comprehensive list of parts and finished dimensions.
Setting Plan - Scaled drawing showing all major dimensions.
Assembly Drawings - Scaled drawings of the major assemblies of
the shell and tube heat exchanger.
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ACOL
1.5 ACOL
Air-cooled Heat Exchangers (and other Crossflow
Exchangers)
You can use ACOL to model a wide range of equipment in which air or
gas flows over tube bundles; including heat recovery tube banks,
economisers, air-conditioning units, wet air dehumidification,
refrigeration coils and intercoolers.
Figure 1.3ACOL
Functionality
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SIMULATION
DESIGN
CHECKING
Simulation is an extended form, for outlet conditions or flowrate, as well
as special options for ‘fans-off’ and evaluating tubeside fouling. Design
is an integrated graphical process aimed at establishing the overall size
and configuration of process air-cooled heat exchangers. The checking
option calculates a heat transfer area ratio (actual/required) to indicate
whether a given exchanger will meet a required duty.
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Introducing HTFS
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Technical Summary
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Tube/Types - Plain, high fin, low fin, serrated fin, studs, and tubein-plate. Up to 4 different types in each bundle.
High-fin Tubes - Integral, G, L, extruded or bi-metallic, shoulder
grooved.
Stud Types - Circular, rectangular, elliptical, lenticular, and
chamfered.
Header Types - Box, plug, cover plate, D-header, manifold, and
U-tube.
Up to 50 passes in simple and complex arrangements.
Graphical interface to specify complex pass arrangements.
2 to 100 rows with multiple bundles per bay and multiple bays per
unit.
Forced draught, induced draught, and no fans.
Single-phase heating or cooling; boiling or condensing on the
process side.
Tube-side Enhancements - Specified on a pass basis; twisted
tapes; enhancement factors; j and f input.
X-side can be dry air, wet air (dehumidifying) or multi-component
gas mixture.
Inlet distributions of X-side temperature and velocity can be
specified.
Performance of proprietary surfaces can be used and stored in a
databank.
Radiation heat transfer can be taken into account.
Special interfaces to CF-P20 fan selection software of
Ventilatoren Sirocco Howden BV (VSH).
Standard fouling resistance or: tubeside fouling as a function of
velocity; temperature; quality; phase or length.
X-side fouling as a function of row.
A and V-frame air cooled condensers.
Non-circular tubes (oval, flat).
Fan inlet types.
X-side enhancements.
Input in SI, metric or US customary (British) units.
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MUSE
1.6 MUSE
Plate-fin Heat Exchangers
The MUSE suite of programs is for the design and performance
simulation of brazed aluminium plate-fin heat exchangers of the type
used in cryogenic air separation plant, natural gas processing, liquefied
natural gas and petrochemical production. Exchangers can be modelled
with up to 15 process streams in co- or counter-current flow and any
complexity of exchanger inlet and outlet geometry. Single units and
multiple blocks in series or parallel with vertical or horizontal
orientations, can be modelled. Thermosyphon reboiler calculations can
be performed for either internal or external types. The programs can
also be used for plate-fin heat exchangers in stainless steel or titanium.
Extensive pressure drop calculations are available for common layouts
of inlet and outlet distributors and checks are made for possible flow
distribution problems.
Figure 1.4MUSE
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Introducing HTFS
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Functionality
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DESIGN
CHECKING
SIMULATION
THERMOSYPHON
Simulation can be on a stream by stream or layer by layer basis.
Technical Summary
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‘Basic’ input option for new users.
Exchanger diagram to aid input review.
Up to 15 process streams in co-current, counter-current or
crossflow with any complexity of exchanger inlet and outlet
geometry.
Single phase, boiling and condensing (any combination).
Vertical or horizontal units.
Specify/evaluate stacking pattern.
Exchanger, distributor, header and nozzle pressure drop
calculations.
Multiple exchangers in parallel.
Longitudinal thermal conduction effects evaluated.
Fin performance correlations included.
Accepts SI, metric and US customary (British) units.
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FIHR
1.7 FIHR
Fired Heaters
The FIHR program is for the simulation of oil and gas fired heaters of the
type used in process industry applications such as hot oil heaters,
refinery and reactor charge heaters, steam reformers and heat recovery
duties.
Figure 1.5FIHR
Functionality
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SIMULATION
FUEL FLOWRATE (for a specified duty)
Introducing HTFS
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Technical Summary
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Extensive help and firebox and tube bank diagrams to aid input.
Firebox radiation modelling by well-stirred method or onedimensional zone method (long furnace model).
Up to ten process streams which may pass through different
parts of the heater.
Process fluid flow co- or counter to the combustion product
gases.
Single phase and boiling process streams.
Multiple paths and passes in firebox and convection section.
Gas or oil fired burners.
Multiple fuels and multiple oxidants.
Cylindrical fireboxes containing vertical hairpin tubes or a
refractory backed helical coil.
Cabin fireboxes with vertical or horizontal tubes which may be
wall mounted or centrally mounted (in single or double rows) with
firing on both sides.
Single or twin cabin fireboxes.
Multi-celled fireboxes.
Up to nine convection section tube banks containing plain tubes
or extended surfaces (fins or studs).
Radiative heat transfer in the tube banks.
’Open’ or ’complex’ flue systems of constant or tapered cross
section, or contain two sections of different diameter.
Option to specify partial draw-off of flue gases, for example to an
air pre-heater.
The firebox or convection section can be modelled alone.
Accepts SI, metric and US customary (British) units for data input
and output.
*.PSF file link to process simulators.
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APLE
1.8 APLE
Plate and Frame Heat Exchangers
The APLE program is a single solution for the design, checking (rating)
and performance simulation of plate heat exchangers, either gasketed
plate and frame or brazed plate, of the type used for general heating and
cooling duties, including vaporisation and condensation.
Figure 1.6APLE
Functionality
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DESIGN
CHECKING
SIMULATION
Design can either use a specified plate geometry and type, or select from
a range of ’typical’ plates.
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Introducing HTFS
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Technical Summary
APLE can deal with the following geometries:
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Single or multi-pass exchangers (up to 5 passes) with either coor counter-current flow. Having one stream single pass and the
other multi-pass is also permitted.
DESIGN calculations use a mean coefficient and temperature
difference approach, within an iteration to select the number of
passes and channels per pass, to meet the constraints on heat
load, pressure drop, flow velocity and port pressure loss.
DESIGN calculations select from a set of 120 plate sizes, which
are not specific to any particular manufacturer, but are ’typical’ of
what may be available. Plate geometry can be specified for other
calculation types. Iteration takes place over four different chevron
angles, and if appropriate over a range of plate sizes to establish
possible designs. Chevron angles can range from 30 to 65
degrees (angle to horizontal).
EXTEND calculations are a special form of DESIGN, in which you
specify the plate to be used and the required number of plates is
determined.
In SIMULATION and CHECKING modes, there can be a different
number of channels in each pass. Calculations are performed on
a more detailed basis, with each pass in the exchanger being
modelled separately, with 25 calculation points per pass. Full
allowance can thus be made for non-linear temperature profiles,
and for variation in heat transfer coefficients and pressure
gradients. The effects of any flow maldistribution among the
plates are also handled.
Streams may be single phase, or boiling or condensing. NonNewtonian fluids are also handled.
Accepts SI, metric and US customary (British) units for data input
and output.
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PIPE
1.9 PIPE
For Unbranched Pipelines
PIPE is for simulation of pipelines. Allowance is made for bends, fittings
and changes of section, single or two-phase flow, and single or multiple
chokes.
Figure 1.7PIPE
Functionality
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The program relates the inlet pressure, outlet pressure and flowrate in a
pipeline. Given any two of these parameters the program calculates the
third.
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Introducing HTFS
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Technical Summary
PIPE can determine:
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The pressure drop for given mass flowrate and pipeline geometry.
The mass flowrate corresponding to a supplied pressure drop
and pipeline geometry.
The diameter factor to size a pipeline for a given pressure drop
and mass flowrate.
The critical mass flowrate for a given pressure drop and pipeline
geometry for high velocity flow.
Perform a ’multiple choke’ calculation (for example, safety valves
and relief systems).
Accepts SI, metric and US customary (British) units for data input
and output.
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FRAN
1.10 FRAN
Feedwater Heaters
FRAN is a specialist program for power plant feedwater heaters, making
allowance for the particular shell and tube geometry used for
desuperheating and condensing the steam heat source.
Figure 1.8FRAN
Functionality
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SIMULATION
CHECKING
Introducing HTFS
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Technical Summary
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Handles one-, two- and three-zone heaters of the shell and tube
type.
Drain cooling section can be of either the full-pass or split-pass
type.
Horizontal or vertical orientation.
1 or 2 tube passes.
Rear head - U-tube and channel.
Counter-current or split flow desuperheating section.
Plain tube type.
Triangular, rotated triangular, square and rotated square tube
layouts.
Single or double segmental plate type baffles. For other baffle
types details of heat transfer and pressure drop correlations must
be supplied. Condensing zone - baffles are considered to be full
circle, such that the predominant flow direction is crossflow.
FRAN accommodates flash stream and/or drains supplied
separately to the heater shell, in addition to the extraction steam
from the turbine.
Steam and water properties are calculated internally.
The effect of special baffle types on heat transfer and pressure
drop can be specified by user correlations.
Flow induced vibration check.
Checks made for wet-wall conditions occurring in the
desuperheating zone and for flashing of condensate in the draincooling zone.
Condensate re-heat calculation: allowance can be made for heat
transfer through the drain-cooler shroud from the steam in the
condensing zone to the condensate in the drain-cooler.
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Back-up for HTFS Programs
1.11 Back-up for HTFS Programs
1.11.1 Documentation
This HTFS User Guide provides basic information on HTFS programs
and how to install them. More complete information is available on the
HTFS product CD and in the Help Text within each program.
On the HTFS product CD you will find:
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HTFS User Guide
Installation Guide
Getting Started for each program
Reference Guide for each program, including a set of worked
examples
The version of this HTFS User Guide on the HTFS product CD may be
more up to date than the printed version. If there are significant
differences, they will be reported in the Read Me. You can access this
from the HTFS Program Selection view, when you use the HTFS product
CD.
1.11.2 Research
HTFS has been undertaking world-leading industrial research in heat
transfer over thirty years. HTFS scientists and engineers regularly
contribute to international conferences, though most HTFS research
results remain proprietary. In conjunction with extensive reviews of
open literature methods they provide HTFS software with a unique
technical base. Many companies require access to underlying heat
transfer and pressure drop models used in the software. HTFS provides
the Research Network information service. This offers the HTFS archive
of research reports, HTFS Design Reports and the HTFS Handbook with
many documents available to subscribing members over the World
Wide Web.
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