Superstructure model of heat pumps for advanced energy systems integration: Part B – Mixtures and absorption

Type: Semester project (10 credits)

Period: 2015 Autumn (September-December)

Assistants: Anna Sophia Wallerand

Student: Stephanie Breton

Context & Goal

Thermally and power driven heat pumps are important technologies for modern advanced energy systems. Employment of heat pumps varies from domestic to industrial heating and cooling applications. Efficient modeling of the thermodynamic behavior is crucial for quantitative analysis of such integrated systems.

In this work, a superstructure MILP (mixed integer linear programming) model of different heat pump technologies will be created. The models will be integrated into the scope of the OSMOSE platform (in Lua programming language) developed at IPESE (EPFL). This platform is oriented at thermo-economic analysis and optimization of advanced integrated energy systems, in which heat pumps play an important role.

Based on a previous project in which a superstructure MILP model of an compression (power driven) heat pump was derived. The student will work on expanding the compression heat pump model to mixtures and and develop a model for thermally driven heat pumps based on the equations that were previously derived. For both topics a strong background in material sciences and thermodynamics is required in order to convert the thermo-chemical effects of sorption/desorption/mixing into a generic thermodynamic notation. The thermodynamic/thermochemical properties are estimated based on Coolprop, an equations based thermodynamic property database.


  • Strong background in material sciences and thermodynamic
  • Energy conversion systems knowledge (EPFL courses: Thermo I/II, Energy conversion, Advanced Energetics, or equivalent)
  • Programming skills: Lua, optimization (Modeling and Optimisation of Energy Systems EPFL course or equivalent)


  • Familiarization with the OSMOSE environment and the Lua programming language
  • Application of the compression heat pump model to mixture
  • Development of thermodynamic syntax for an absorption chiller model
  • Implementation of absorption chiller model
  • Testing and validation
  • Report & Presentation


[1] Shelton, Mark R., and Ignacio E. Grossmann. “Optimal synthesis of integrated refrigeration systems—I: Mixed-integer programming model.” Computers & chemical engineering 10.5 (1986): 445-459.

[2] Shelton, M. R., and I. E. Grossmann. “Optimal synthesis of integrated refrigeration systems—II: Implicit enumeration scheme.” Computers & chemical engineering 10.5 (1986): 461-477.

[3] Engler, M., G. Grossman, and H-M. Hellmann. “Comparative simulation and investigation of ammonia-water: absorption cycles for heat pump applications.” International Journal of Refrigeration 20.7 (1997): 504-516.

[4] Sun, Da-Wen. “Thermodynamic design data and optimum design maps for absorption refrigeration systems.” Applied thermal engineering 17.3 (1997): 211-221.