Erstellung von Wohngebaeude-Lastprofilen zur spaeteren Verwendung bei der Simulation eines saisonalen Waermespeichers 2. Technischer Fachbericht zum Forschungsvorhaben: Analyse und Konzeption der saisonalen Speicherung solarer Waerme in Grubenraeumen

Abstract

The Second Technical Report of the project ''Analysis of Seasonal Storage of Solar Heat in Mines'' describes how to establish different models of buildings and the supply components like the heating and domestic hot water systems for the simulation programme TRNSYS. The aim of the simulation is to generate database files of the heat demand for the integration into other TRNSYS simulation tools. Two different models are developed for the simulation, a building for two families with a living space of 160 m"2 and a larger one with 6 flats and 390 m"2 altogether. Both buildings are designed in two thermal insulation standards. The heating system either consists of radiators controlled by mass flow or of a temperature controlled floor heating system with non-varying mass flow. The conception of the individual models corresponds to the direct and the indirect integration of the buildings in the distribution network. The domestic hot water system is designed with or without a buffer storage. The simulation results show that the mass flow and the temperature differences between flow and return in the distribution network are essentially determined by the heating system. For the examined variations, the share of the distribution network losses amounts to an average of approximately 11.4%. The comparison of the different concepts of building connections to the network proves that an indirect integration is unfavorable, because it leads to higher losses within the building. For the design of the domestic hot water system only a small influence on the entire result can by found. A floor heating system needs more than 820 operation hours less than one with radiators, because the floor heating uses a considerable storage mass of the building structure. Compared with the smaller building, the specific heat demand of the more compact designed house which is devided into six flats, is approximately 5 kWh/(m"2.a) lower. (orig.)SIGLEAvailable from TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekArbeitsgemeinschaft Solar Nordrhein-Westfalen, Juelich (Germany)DEGerman