Validation of TEKNOsim 6 According to CIBSE TM33

  • Marwan Abugabbara
  • Saqib JavedEmail author
Conference paper
Part of the Springer Proceedings in Energy book series (SPE)


TEKNOsim is a simple and user-friendly program for analyzing thermal indoor climate and performing annual hourly simulations. The program was originally developed to calculate heating and cooling demands, and indoor climate conditions of a single zone building for peak winter and summer design days. However, TEKNOsim version 6 has been revised to incorporate several new features including annual energy and multi-zone simulations. These features greatly enhance the functionality and the ability of the program. Their implementation in TEKNOsim 6, however, entails a validation procedure to test the accuracy of the new algorithms. This paper presents preliminary results of the ongoing testing and validation of TEKNOsim 6 according to CIBSE TM33 tests for software accreditation and verification. The test results indicate that the new database libraries implemented in TEKNOsim 6 can be easily customized to precisely represent the actual building conditions. The results also show that the program can accurately calculate the total steady-state heat losses for all test cases of CIBSE TM33. The peak cooling loads calculated by TEKNOsim 6 are also in good agreement with CIBSE TM33 for most test cases. Some discrepancies are however observed between TEKNOsim 6 and CIBSE TM33, especially for test cases involving certain building elements. Nevertheless, TEKNOsim 6 is shown to be a fast and reliable program for performing early-design stage simulations.


TEKNOsim CIBSE TM33 Testing Validation 


  1. 1.
    Lindab, About Lindab, [Online]. Available: Accessed 28 Aug. 2017
  2. 2.
    Lindab Climate. TEKNOsim Climate Simulation. Lindab, 2001Google Scholar
  3. 3.
    G. Brown, The BRIS simulation program for thermal design of buildings and their servicesm. Energy Build. 14–4, 385–400 (1990)Google Scholar
  4. 4.
    H. Bley, in Comparison—Cooling Load Calculation TEKNOsim Versus VDI 2078. Report: Cologne University of Applied Sciences, Germany (2007)Google Scholar
  5. 5.
    VDI 2078. Cooling Load Calculations of Air-conditioned Rooms, VDI Cooling Load Regulations, 1996Google Scholar
  6. 6.
    S. Javed, R. Lechner, J. Behrens, in TEKNOsim: A Building Energy Simulation Program. Proceedings of the 12th REHVA World Congress (Clima 2016), Aalborg, Denmark, 22–25 May 2016Google Scholar
  7. 7.
    M. Abugabbara, in Validation of TEKNOsim 5: Verification Against Different Standards and Building Energy Simulation Tools. Master thesis in Energy-efficient and Environmental Buildings, Lund University, Sweden (2017)Google Scholar
  8. 8.
    CIBSE, Tests for Software Accreditation and Verification—CIBSE TM33:2006 (CIBSE Publications, London, 2006)Google Scholar
  9. 9.
    National Calculation Methodology for the energy performance of buildings: The UK implementation of the requirements of the Energy Performance of Buildings Directive (Office of the Deputy Prime Minster, London, 2006)Google Scholar
  10. 10.
    BSI, Thermal performance of buildings—Calculation of internal temperatures of a room in summer without mechanical cooling—General criteria and validation procedures, BSI Standards Limited, UK, 2012Google Scholar
  11. 11.
    BSI, Energy performance of buildings—Sensible room cooling load calculation—General criteria and validation procedures, BSI Standards Limited, UK, 2007Google Scholar
  12. 12.
    BSI, Thermal performance of buildings. Calculation of internal temperatures of a room in summer without mechanical cooling. Simplified methods, BSI Standards Limited, UK, 2005Google Scholar
  13. 13.
    Y.J. Huang, F. Su, D. Seo, M. Krarti, Development of 3012 IWEC2 weather files for international locations (RP-1477). ASHRAE Trans. 120, 340–355 (2014)Google Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Lindab Ventilation ABBåstadSweden
  2. 2.Building ServicesLund UniversityLundSweden

Personalised recommendations