Heat Transfer Agent Charts & Tables
Heat Transfer Agent Consumption Chart
You can view in a chart the detailed rate of consumption for a given heat transfer agent by selecting } } } (Heat Transfer Agent Demand Chart (Single Batch)) or } } } (Heat Transfer Agent Demand Chart (Multiple Batches)) from the main menu of the application. In a continuous process that contains batch procedures the same chart can be displayed by selecting } } } from the main menu. Before the chart is presented, you will be prompted to choose whether you wish to plot a heating or cooling agent and the agent from the list of used agents.
Besides the actual consumption rate curve, users can chose to see at on the same chart the following lines:
1. A time-averaged consumption rate line (averaged over a user-specified periodic window); for example, users may be interested in seeing the consumption rate of a given buffer in 8-hour average values. Such lines can provide insight in designing the production rate of the replenishing process.
2. A cumulative amount line: Amount total may be of interest when considering inventory capacity. Users may also specify a time period after which the accumulated amount gets reset to 0.0.
The style of the consumption chart dictates exactly which lines will be plotted. As part of the chart’s style you can also specify the rate units and the amount units to be used for the chart, as well as the visual characteristics of the lines (color, thickness, etc.) The time-line parameters used (absolute vs relative time scale, minor/major intervals & gridmarks, etc.) are, by default, those kept by the process document. They can, of course, be customized for the consumption charts if needed. The chart’s style can be changed through the Utility Chart Style Dialog.
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The unit choices for plotting rates and cumulative amounts are ‘remembered’ by the application in association with the utility being plotted. In other words, you can specify a set of units to be used when viewing utility-A (e.g. kg/h for rate and kg for amounts) and a different set of units to be used when viewing utility-B (e.g MT/day and MT). On the other hand, the rest of the properties of the graph style (line characteristics, time line properties, etc.) will be used for all utility charts (regardless of the utility chosen).
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For the basic common services offered by all time charts (setting the number of batches, zooming in/out, adjusting the time scale, copying the chart as picture, copying chart data to Excel, printing, etc.), see Material Consumption & Material Output Charts.
Heat Transfer Agent Consumption Inventory Chart
When considering the consumption of a heat transfer agent, it is often of importance to design inventory capacity and/or select a preferred replenishing rate so that the process never runs out of an agent and at the same time, excessive amounts of storage are avoided. SuperPro Designer will not design the inventory system for you automatically. The time-averaged consumption rate curve and time-reset cumulative curve presented on the consumption chart provide good clues on what should be your targets for replenishing rate and storage capacity correspondingly, see Heat Transfer Agent Consumption Chart. However, it is up to the user to provide the application with a suggested inventory strategy then the application can generate an inventory chart that will show utility amounts in the holding tank during one or several overlapping batches. Before any inventory information for a heat transfer agent can be specified first you must define that the agent is storable. This is done by editing the corresponding check box in the Heat Transfer Agents Properties tab (see Heat Transfer Agent Properties). The inventory information needed in order to generate an inventory chart is the following:
1. Storage capacity
2. Initial contents
3. Lower & upper limits on storage capacity (if anything other than 0% and 100%)
4. Supply (replenishing) rate
5. Supply (Replenishing) policy: Need a start time when policy activates and an on/off triggering mechanism (either tied to inventory level or tied to a regularly timed schedule).
Inventory parameters can be specified through the Heat Transfer Agent Properties Dialog: Inventory Data tab.
You can view inventory charts by selecting } } } (Heat Transfer Agent Inventory Chart (Single Batch)) or } } } (Heat Transfer Agent Inventory Chart (Multiple Batches)) or } } } from the application’s main menu.
For the basic common services offered by all time charts (setting the number of batches, zooming in/out, adjusting the time scale, copying the chart as picture, copying chart data to Excel, printing, etc.), see Material Consumption & Material Output Charts.
Heat Transfer Agent Consumption (Demand) Table
The process keeps a detailed log of all heat transfer agents present. If you wish to have a direct view of all the agents present currently, you can open the process explorer and pick the ‘Util’ tab of the Process Explorer Toolbar. This tab will present a quick reminder of all the heat transfer agents registered in the process.
If you are interested in seeing the total demand for heat transfer agents then you should visit the List of Heat Transfer Agents Currently in Use shown when you select } from the flowsheet’s context (right-click) menu or } } from the application’s menu. This dialog will itemize all heat transfer agents currently in use in the process, their total demand (per batch or per year), their price and total cost.
If you are interested in tracking down the locations and rates where a given heat transfer agent is being consumed, then select } from the application’s main menu. The Heat Transfer Agent Demand Breakdown dialog that appears will present in a tree-like view (with top nodes each heat transfer agent) the demand for each agent and how all the exact sources where they are needed.