IEA-ECBCS Annex 48


Audit is required, among others, to identify the most efficient and cost-effective Energy Conservation Opportunities (ECOs), consisting in more efficient use or in (partial or global) replacement of the existing building components. The Annex 48 project has been launched in 2006 by the IEA- ECBCS by means of to the participation of several international institutions such as Ecole des Mines de Paris (France), Fachhochschule Nürnberg (Germany) and obviously the University of Liège. As stated above the aim of the project is to promote the most efficient combinations of heating and cooling techniques in air conditioned non-residential buildings thanks to heat recovery and reversible systems. The main goals of this project are to:

  • Allow a quick identification of heat pumping potentials in existing buildings;


  • Help designers in considering “heat pumping” solutions;

  • Document the technological possibilities and heat pumping solutions;

  • Improve commissioning and operation of buildings equipped with heat pump systems;

  • Make available a set of reference case studies.


Developing a computer-based tool which could evaluate the energy, environmental and economic potential of different categories of heat pump systems has beee. In practice, such tool will be implemented on EES (Engineering Equation Solver - ©F-Chart Software). This evaluation will be based on input data such as heating and cooling demand related to the type of building, weather data, type of heat pump systems, etc… Finally the two main tagets of this tool are to: 

  • Give an accurate assessment of the energy saving , the CO2 emission reductions and the economic advantage reducing the number of program inputs

  • Help the decision-maker to select the best solution in terms of costs/environmental impact.


Reference book [PDF]

IEA48 - Potential Identification Tools [EXE] [EES]

IEA48 - Simulation Tools [EXE] [EES]



Previous page: SimAudit
Next page: EES Fluidprop Interface