Template:Evaporator Results Tab
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The page contains the results and the user may enable the Heat Exchanger function and set the type of Heat Exchanger (Internal or External) and the flow to the Heat Exchanger.
Tag (Long/Short) | Input / Calc | Description/Calculated Variables / Options |
Operating Conditions | ||
TemperatureIn / Ti | Calc | The temperature of the combined Feed stream to the Evaporator. |
PressureIn / Pi | Calc | The pressure of the combined Feed stream to the Evaporator. |
VapFlashed.MassFlow / VapFlashed.Qm | Calc | The quantity of flashed vapour. |
BPE | Calc | The Boiling Point Elevation used in the Flash calculations in the Evaporator. |
FlashT | Calc | The final temperature (the Flash Temperature) in the Evaporator. |
FlashP | Calc | The final pressure (the Flash Pressure) in the Evaporator. |
Flash Train Macro Model These extra fields are only visible if the unit is part of a Flash Train. | ||
VapourMassFlow / VQm | Calc | The mass flow of flashed vapour. |
PressureReqd / P_Reqd | Calc | The required flash pressure calculated by the Flash Train. |
TotalPressChange / TotaldP | Calc | The total pressure change calculated by the Flash Train. |
FlashTrain | Display | A unique tag assigned to the flash train by SysCAD. Each unit in the flash train will have the same tag in this block. |
FlashTearBlock | Display | Displays the name of the tear block that is part of the Flash Train. |
FlashTrainEqp | List | This contains a list of all of the equipment tags in this flash train. the list might be as follows: FT_EVAPORATOR_2_HX FT_EVAPORATOR_1_Evap |
PAdvBase | Input | Additional damping or acceleration for calculated pressure change (DP) for the iteration. DP = DP * PAdvBase when PAdvExtra=0. |
PAdvExtra | Input | Additional damping or acceleration for calculated pressure change (DP) for the iteration. DP = DP * (PAdvBase + PAdvExtra*(VQmReqd-VQm)/Max(VQmReqd,VQm)). |
Summary of input and output streams The following tags are shown for Feed, Vapour, Overflow (OF) and Product (Prod) streams: | ||
Temperature / T | Display | The temperature of the stream. |
MassFlow / Qm | Display | The Mass flowrate of the stream. |
SolidMassFlow / SQm | Display | The solids Mass Flow of the stream. |
SolidFrac / Sf | Display | The solids Mass fraction of the stream. |
Results | ||
BFeed.Temperature / BFeed.T | Calc | The temperature of the Feed to the Evaporator evaluation block. |
BFeed.Pressure / BFeed.P | Calc | The Pressure used in the calculations in the Evaporator evaluation block. If the user has ticked the 'UseFeedP' then this will be the feed pressure to the Evaporator. |
BFeed.MassFlow / BFeed.Qm | Calc | The mass flow of Feed to the Evaporator evaluation block. |
BFeed.SolidMassFlow /BFeed.SQm | Calc | The mass flow of solids to the Evaporator evaluation block. |
Body.SolidsYield | Calc | The mass flow of solids in the Product - mass flow of solids in the Feed. |
SolidsYield | Calc | The mass flow of solids in the Product - mass flow of solids in the Feed. |
Evaporator to Embedded or External Heater / Cooler | ||
HXOut.MassFlow / HXOut.Qm | Calc | The mass flow to the specified Heat Exchanger. |
HXOut.EachHeaterQm | Calc | The mass flow to the specified Heat Exchanger (per heater if more than one is used). |
HXOut.VolFlow / HXOut.Qv | Calc | The volume flow to the specified Heat Exchanger. |
HXOut.EachHeaterQv | Calc | The volume flow to the specified Heat Exchanger (per heater if more than one is used). |
HXOut.Temperature / HXOut.T | Calc | The temperature of the stream to the specified Heat Exchanger. |
Embedded Heater Recycle Loop convergence | ||
RecycleConvergeMethod | FullStream | User can select to solve the recycle loop using Full stream data (loop has to solve and converge all mass and energy terms.) |
Stream Mass Only | User can select to solve the recycle loop using mass only. Loop will be solved when mass is converged, ignoring energy. | |
Duty | User can select to solve the recycle loop using energy only. Duty from "shell" side of heat exchanger is added directly to the feed (recycle mass flow is not actually added). Loop will be solved when duty is matched, ignoring mass balance. | |
MaxIter(Global) | Input | The maximum number of iteration allowed within the recycle solver loop. Only shown for Stream Recycle Converge Methods. |
IterSteps | Calc | The number of iteration used in the current step to solve the recycle loop. Only shown for Stream Recycle Converge Methods. |
IterLastStep | Calc | The number of iteration used in the last step to solve the recycle loop. Only shown for Stream Recycle Converge Methods. |
IterMaxInAStep | Calc | The maximum number of iterations (in a step) used to solve the recycle loop. Only shown for Stream Recycle Converge Methods. |
IterTotal | Calc | The total number of iterations used to solve the recycle loop. Only shown for Stream Recycle Converge Methods. |
FeedMaxDuty | Calc | The maximum amount of Duty that can be added to feed before temperature exceeds water critical temperature. Only shown for Duty Recycle Converge Method. |
IterDuty | Calc | The number of iterations to apply duty and flash. When this is greater then 1 then the Duty from the condensing steam is applied in iterations, the values displayed on the VLE page reflect this. Only shown for Duty Recycle Converge Method. |