SysCAD 137 New Models and Add-On

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What's New New Models
and Add-On
Model
Improvements
Reaction Block
Improvements
User Interface
Improvements
Other
Improvements
Project Upgrade And
Changes that Affect Results

New Models

Direct Contact Heater 2

Direct Contact Heater2.png (Full documentation of this unit operation can be found here: Direct Contact Heater 2)
  • The new Direct Contact Heater 2 is used to transfer energy from a stream containing live steam to a liquid or slurry stream.
  • It has additional options and improved functionality compared to the original Direct Contact Heater model which includes:
    1. Pressure specification
    2. Vent stream Handling
  • The model can make use of the Demand logic, including as part of a Flash Train.

Pressure Exchanger

Pressure Exchanger.png (Full documentation of this unit operation can be found here: Pressure Exchanger)
  • The new Pressure Exchanger unit model can be used to model energy recovery devices such as those used in reverse osmosis plants to recover energy from high pressure brine streams.
  • The unit has two feeds, a low pressure feed and a high pressure feed. The pressure energy in the high pressure feed is transferred to the low pressure stream, thus acting like a pump for the low pressure stream, increasing its pressure.
  • The model can be used to model a wide variety of physical devices such as a Pelton wheel, a Francis turbine, a reverse pump, a Turbocharger and a PX.
  • The model includes a leakage parameter to allow for modelling of devices where some mixing can occur.
  • The model can make use of the Demand logic to set the flow on the low pressure side.

Simple Condenser

SimpleCondenser2.png (Full documentation of this unit operation can be found here: Simple Condenser)
  • The new Simple Condenser is a generic "heat exchanger" model without regards to its cooling media or equipment size.
  • It can provide estimates of the Duty required to condense an amount of material, or alternatively, determine the amount of condensation for a given duty or temperature.
  • The model can make use of the Demand logic, including as part of a Flash Train.

Simple Evaporator

SimpleEvaporator.png (Full documentation of this unit operation can be found here: Simple Evaporator)

  • The new Simple Evaporator is a generic "heat exchanger" model without regards to its heating media or equipment size.
  • It is designed to give estimates of the Duty required to evaporate a required amount of material. Only a single component can be evaporated such as H2O(l) or NH3(aq).

Slew Rate Controller

  • The new Slew Rate Controller is used to gradually change a process variable to a setpoint.
  • It can be used in both steady-state and dynamic simulations for the purpose of making gradual changes.
  • It has a number of methods available to make the gradual change including fixed rates and first order response.
First Order Response.png (Full documentation of this unit operation can be found here: Slew Rate Controller)

Thermocompressor

Thermocompressor 1.png (Full documentation of this unit operation can be found here: Thermocompressor)

  • The new Thermocompressor is a form of steam ejector in which a flow of higher pressure primary steam is used to entrain lower pressure secondary steam.
  • The discharge stream is at an intermediate pressure between the high and low pressure steam flows. This potentially enables recovery of some of the energy in the low grade steam.
  • The Thermocompressor model in SysCAD is based on data sheets from the Shutte and Koerting company.

Underflow Washer

Underflow Washer.png (Full documentation of this unit operation can be found here: Underflow Washer)

The Underflow Washer is used to separate the solids from the liquids in the feed stream and then wash the solids with a wash stream. This unit is similar to the Washer and the Counter Current Washer.

  • The user defines the percentage solids in both the underflow and the overflow from the unit.
  • If there is insufficient solids in the feed to the Underflow Washer to satisfy both the under and over flow requirements, the unit will try to satisfy the underflow solids / liquids requirements first.
  • The wash stream combines with the underflow solids and 'washes' the feed liquid out of the solid stream.
  • The model allows the user to set sub-models in the Feed section, Underflow and Overflow sections. The following sub-models are avaialble in each section:
    • The Feed section, EB, allows the user to set Solubility, Reactions, Makeups, Environmental Heat Exchange and Evaporation;
    • The Overflow section, OFEB, allows the user to set Solubility, Reactions, Environmental Heat Exchange and Evaporation; and
    • The Underflow section, UFEB, allows the user to set Solubility and Reactions.
  • The temperature of the solids and liquids is calculated after any reactions and/or heat loss has occurred.

New SysCAD OLI Add-on

Implemented new OLI add-on for SysCAD. OLI Systems provide leading Electrolyte Simulation Software. This SysCAD add-on requires an appropriate license from OLI Systems (olisystems.com) as well as requiring SysCAD "Heat Exchange" and "SMDK Runtime" add-ons. OLI in SysCAD is not implemented as a Species Properties Model but as unit models for use at appropriate locations in a plant model. Currently the following unit models using OLI are implemented:

  • OLI Chemistry Model - Used to define and view various options for the selected OLI chemistry model, including management of mapping of SysCAD species list to species list used in OLI.
  • OLI Sample Model - Stand alone unit model to perform side calculations using OLI for predicting aqueous chemistry equilibrium conditions and properties including pH.
  • OLI Reactor - Include this model in a SysCAD stream to use OLI to calculate predicted outlet conditions. Functionality is similar to SysCAD Reaction Block and FEM where for a given feed reactions occur with optional heat exchange. The model can be configured in a number of ways for different purposes.