Summer 2014 /

Process Modelling and Optimization. 

The Process Ecology Newsletter includes updates and news relevant to the energy industry regarding regulatory updates for air emissions, technical information related to process simulation as well as case studies and best practices in process engineering.

Storage tank loading and unloading schedules at LNG terminals
A dynamic simulation approach

Rising global gas demand driven mainly by cleaner power production and the availability of new natural gas sources are driving significant growth in the LNG markets. Large natural gas field discoveries on and offshore have prompted several countries to plan liquefied natural gas (LNG) export projects, including in North America, Australia, East Africa and the east Mediterranean. In one of such scenarios the expansion called for two new 50,000 m3 paraffinic naphtha storage tanks to increase the capacity and to replace existing tanks, which had reached the end of their design life.

The storage and shipping of fluids require the temperature of the product not to exceed strict limits due to the light components content of the product. A dynamic simulation study was performed to evaluate conditions during the filling, storage, and unloading stages with enhanced representations of heat transfer within the storage tanks.

Aspen HYSYS version 7.3 was used to model the process in dynamics mode with additional heat transfer correlations coded and linked to the model to evaluate the heat transfer impacts on the product temperature at one-hour intervals. (...)  Full text


Economic evaluation of process flowsheets using Aspen HYSYS

Integrated economics is a new feature in Aspen HYSYS® that enables process engineers to rapidly estimate the relative capital and operating costs in their process modeling studies using Aspen HYSYS. This feature brings the benefits of the Aspen Economic Evaluation product family (the ICARUS family) to the process simulation environment. The ICARUS family includes:

- Aspen Process Economic Analyzer (formerly known as Icarus Process Evaluator)
- Aspen Capital Cost Estimator (ACCS)
- Aspen In-Plant Cost Estimator
The new costing module evaluates economics based on Icarus technology. The approach used in the technology doesn’t rely on capacity-factored curves for equipment sizing, nor does it rely on factors to estimate installation quantities and installed cost from bare equipment cost. Instead, it follows industry-standard design codes and procedures to represent equipment with associated plant bulks, and cost modelling and scheduling methods to estimate the cost of project.

In general, the new feature will be of interest to many HYSYS users due to its functionality in reasonable cost estimation of a project through a simple system and in providing a way to study process alternatives from an economic point of view early in the process design. However, it should be noted that the sizing and the cost evaluation of a project are performed using default methods and procedures and missing data is estimated by system. So, if the user enters more detailed information in the system based on the design criteria and the scope of the project, the estimated cost of the project would be more accurate. (...) Full text

Track your flared and vented gas volumes using Process Ecology's new FlareAdvisor software.

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This issue
  • Loading and unloading schedules at LNG terminals: A dynamic simulation approach 
  • Economic evaluation using Aspen HYSYS
  • FlareAdvisor: track your flared and vented volumes more accurately
 Next Training and Events
  • Process Ecology to deliver Heat Recovery Workshop with NRCan, Toronto, ON Fall, 2014.
  • PTAC Air Emissions Forum will include an update on the development of a web-based BTEX Condenser model, Calgary, AB September, 2014.
  • Process Ecology to deliver the course "Improving Natural Gas Facility Profitability with Process Simulation" in Kuala Lumpur, Malaysia, September 2014.
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