Comparison between quasi-steady energy calculation software IBE and dynamic simulation software TRNSYS applied to cold zone

Presents the quasi-steady building energy calculation method proposed by ISO 13790.To verify its calculation accuracy, compares the calculation results of IBE based on the quasi-steady method with a validated dynamic simulation tool TRNSYS in both single-zone and multi-zone models in cold zone. Discusses the effects of different southern window areas and internal heat and ventilation schedules on the calculation results in the single-zone model. The results show that the relative deviations of the two software’s load calculation results are mostly less than 20%, but there is a large deviation in the annual cumulative heat load calculation results when the southern window area is small, due to the underestimated dynamic factor by IBE. In general, the quasi-steady method is suitable for the Chinese residential building energy calculation in cold zone, and the calculation precision meets engineering requirements.