Validating E-PASS Energy Calculator with IDA Indoor Climate and Energy Simulation Software

APPENDIX

Validating E-PASS energy calculator with IDA Indoor Climate and Energy simulation software Author Jaakko Ketomäki 1 Procedure In the validation process the energy consumption of the case buildings with the same specification was calculated with using the E-PASS calculator version 0.11 (http://cic.vtt.fi/epass/vtt/step_1.php) and IDA Indoor Climate and Energy simulation software. The calculated buildings were  One family house with 120 m2 area and 1 floor  Apartment building with 2000 m2 area and 3 floors  Office building with 2000 m2 area and 2 floors The simulation was done using the typical constructions and building services defined in E- PASS. 13 different buildings were taken into account in decades 1910-2017 and moreover one building from decade 1961-19701 was improved by using the constructions of a 2011- 2017-building. Simulation models of the building can be seen in Figures 1-3.

Figure 1. Simulation model of a single house Figure 2. Simulation model of an apartment building

Figure 3. Simulation model of an office building 2 Results The of the energy calculations results are presented in Figures 4-9

Figure 4. Energy consumption of a single house calculated using E-pass

Figure 5. Energy consumption of a single house simulated using IDA-ICE

Figure 6. Energy consumption of an apartment building calculated using E-pass

Figure 7. Energy consumption of an apartment building calculated using IDA-ICE

Figure 8. Energy consumption of office building calculated using E-pass

Figure 9. Energy consumption of office building calculated using IDA-ICE

3 Conclusions In can be seen, that the calculated energy consumptions calculated using E-PASS and IDA- ICE are in line. Because the method of the calculation is different there are also some differences between the results. However, the difference between the energy consumption calculated with different methods is in most cases below 10%, which is a satisfactory result. Typically the absolute difference remains on the same level. Thus the relative difference is higher in the cases, where the energy consumption is low (2011-2017 and ZEB). In addition, one case with improvements was calculated and the building from years 1961- 1970 was improved by using 2011-2107 constructions. In this case the difference between calculation methods was the same as in other cases.