Building Qualitative Models of Thermodynamic Processes

Abstract

This paper describes a qualitative domain theory for core phenomena in engineering thermodynamics, expressed in Qualitative Process theory. It represents many of the best features of domain models developed by our group over the past five years. It focuses on supporting system-level qualitative analyses of typical fluid and thermal systems, such as refrigerators and power plants. We use explicit modeling assumptions [3] to control the level of detail used in building models of specific scenarios. We begin by outlining the primitives of the specific QP modeling language. The bulk of the paper describes the domain model itself, highlighting our design choices, simplifications, and use of modeling assumptions. Next we demonstrate how this domain model can be used to build models of a variety of specific scenarios, including simplified versions of a refrigerator, a steam plant, and a thermal control system. Finally, we describe some planned extensions to the model.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2007
Accession Number
ADA465196

Entities

People

  • John W. Collins
  • Ken Forbus

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • C4I
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Boiling Point
  • Energy
  • Energy Conversion
  • Energy Transfer
  • Equations Of State
  • Fluid Dynamics
  • Fluid Flow
  • Heat Energy
  • Heat Of Vaporization
  • Heat Transfer
  • Ideal Gas Law
  • Latent Heat
  • Phase Transformations
  • Steady State
  • Thermodynamic Processes
  • Thermodynamics
  • Transitions

Fields of Study

  • Engineering

Readers

  • Computational Modeling and Simulation
  • Electrical Engineering
  • Theoretical Analysis.