CoolPack is an older collection of simulation models for refrigeration systems and each of them has a specific purpose e.g. cycle analysis, sizing of main components, energy analysis and optimization.
CoolPack was developed by the Department of Mechanical Engineering (MEK), Section of Thermal Energy (TES) at the Technical University of Denmark (DTU). The development of CoolPack has until version 1.33 been financed by the Danish Energy Agency as part of the SysSim project. IPU hosts the CoolPack download pages.
About the project
CoolPack is no longer maintained, nor do we plan to do so in the future. A large part of CoolPack is based on EES, and difficult to maintain.
Please have a look at the new CoolTools software, for calculations with new refrigerants. It does not have all the same functionality as CoolPack has, but it comes with a lot of the new refrigerants built-in, and receives regular updates. The idea is to make a more modular software with different components that can be updated individually. Ideally, this new software would be supported by the community and receive continuous upgrades.
If you are looking for transcritical CO2 system calculations, please have a look at Simple one-stage CO2.
For yearly calculations, and comparing different system designs for refrigeration and heat pumps, we offer the commercial software Pack Calculation Pro.
Lastly, if you are interested in secondary side calculations (e.g. water, glycol loops), SecCool may be worth taking a look at.
If you wish to proceed using CoolPack, please find the download link below.
Features of CoolPack
The following simulation purposes are covered:
Cycle analysis (process design)
Analysis of operating conditions
Transient simulation (cooling of an object/room)
Refrigerant calculations (property plots, thermodynamic & transport properties, comparison of refrigerants)
Life cycle cost (LCC)
As indicated by the name, CoolPack is a collection of simulation programs related to refrigeration. It consists of “Refrigeration Utilities”, “EESCoolTools”, and a transient element called “Dynamic”.
The first version of Refrigeration Utilities was released in 1995 and the program has since then been updated continuously with new refrigerants, more property plots etc.
EESCoolTools has been formally introduced as part of CoolPack (March 1999). The name EESCoolTools is a combination of the three words EES, Cool and Tools:
“EES” refers to the name of the program used to develop the simulation models (Engineering Equation Solver – EES).
“Cool” refers to that the programs are related to the area of refrigeration.
“Tools” refers to that the programs are thought to be tools enabling you to make faster and more detailed system design and energy analysis.
EES is developed by S. A. Klein and F .L. Alvarado, and is sold by F-Chart Software in Wisconsin, USA. You can get more information about EES and F-Chart Software on the Internet.
The dynamic elements are modeled and solved using a DAE-type simulation program called DALI. DALI was developed at the Refrigeration Laboratory (now part of Section of Thermal Energy at the Technical University of Denmark) in 1985. Originally, it was programmed in Pascal but the present release is updated to Delphi. So far we have included one transient element: simulation of the cooling of an object with the possibility of applying an on/off control of the compressor.
The CoolPack program is freeware and it may be distributed freely. For more information, see:
If interested, you can also join our mailing list to get informed about releases of new software, and to get access to early preview versions. You can sign up on https://www.ipu.dk/ at the bottom of the page, remember to select the interest category “Thermodynamics and Energy Technology”.
Specialist Engineer, Thermodynamics and Energy Technology M.Sc., Ph.D.