A whopping 50% of residential sector demand is used for space heating in IEA countries and this is expected to be around 70% for countries such as Germany and Poland. Energy use in the buildings sector follows a trend which increases it by 88% between 20, or 1.4% per year. Global energy consumption in the residential sector grows on average at 1% per year. In contrary to the energy policies’ aims of reducing the energy consumption, the energy demand in residential sector has increased by 15% in the last decade in UK.
According to, the annual rate of new building construction is always higher than the demolition rate. In many countries, new buildings could be made 70% more efficient than existing buildings. Buildings with their long lifespan and huge amount of already existing buildings, makes revision in energy characteristics of a building constrained. The building sector plays a large role in the energy consumption which includes space heating or cooling, domestic hot water and electricity. Finally, the necessity for intelligent control system for a complicated building system with multiple energy source is justified and the requirements of such control systems are enlisted.Īs already mentioned in a lot of instances, the report estimates that around 40% of the world’s final energy is used for residential buildings. Thus, the paper showcases the importance of the building, not only geometry but also building physics and energy efficiency. The same SFH according to different standards is simulated with TRNSYS and the energy system (including solar thermal collectors, PV, gas boiler, fuel cell CHP, thermal storage and electrical storage) for each house is optimized and compared. The differences in the system design, their control strategy and how it affects the system sizing or renewable fraction is explained in this paper. The houses are selected such that high renewable energy self-production, low energy demand house, low net energy house and an old 1995 constructed house are compared. Using a case study of four different standards-Sonnenhaus, KfW55, Passive house and WSchVO95 of single family houses (SFH) of same geometry and boundary conditions the control constraints are showcased. Hence, the decentralized energy system has different configurations for each building standards and buildings built up according to each standards and have necessity to be controlled in a different approach. There are different types of buildings and different standards, which are for each of them. Buildings play an important role in the energy consumption of a household.