TY - JOUR A1 - Spindler, Uli T1 - Absorption Heat Pump for Home Retrofit JF - IEA Heat Pump Center Newsletter KW - Heat pump KW - Home retrofit Y1 - 1997 IS - 1/97 ER - TY - JOUR A1 - Ziegler, Felix A1 - Spindler, Uli T1 - An ammonia refrigerator with an absorption circuit as economizer JF - International Journal of Refrigeration KW - Refrigeration KW - absorption circuit Y1 - 1993 IS - 7/93 SP - 230 EP - 239 ER - TY - JOUR A1 - Kim, K. A1 - Spindler, Uli A1 - Jung, Dieter A1 - Radermacher, Reinhard T1 - R22/R152a Mixtures and Cyclopropane (RC270) as Substitutes for R12 in Single-Evaporator Refrigerators: Simulation and Experiments JF - ASHRAE Trans KW - Single-Evaporator Refrigerators KW - Cyclopropane KW - R22/R152a Mixtures KW - Substitutes for R12 Y1 - 1993 IS - Vol. 99 ER - TY - JOUR A1 - He, Xiaoming A1 - Spindler, Uli A1 - Jung, Dieter A1 - Radermacher, Reinhard T1 - Investigation of R-22/R-142b Mixture as a Substitute for R-12 in Single-Evaporator Domestic Refrigerators JF - ASHRAE Transactions KW - Single-Evaporator Domestic Refrigerators KW - R-22/R-142b Mixture KW - Substitute for R-12 Y1 - 1992 IS - Vol. 98 ER - TY - CHAP A1 - Rabold, Andreas A1 - Kollmannsberger, S. A1 - Rank, E. T1 - Integrated Vibro-Acoustical Design Optimization of Multi-storey Buildings T2 - DAGA 2013-Meran N2 - Integrated Vibro-Acoustical Design Optimization of Mult i-storey Buildings Andreas Rabold 1 , Stefan Kollmannsberger 2 , Ernst Rank 2 1 ift Rosenheim, 83026 Rosenheim, Germany, Email: ra bold@ift-rosenheim.de 2 Technische Universität München, 80290 München, Ger many, Email: kollmannsberger@bv.tum.de Introduction Timber buildings have been pioneering building constructions in terms of energy conservation and r esource efficiency. Low-energy-consumption or so called pas sive- houses built of timber are known to combine an environmentally-friendly construction principle wit h high expectations on aesthetics and modern architecture. The number of multi-storey residential buildings erecte d in timber construction has been steadily increasing in the last few years, also in urban areas and centres. Compared to similar construction projects built in concrete the design of a multi-storey building in timber con struction is more demanding and challenging to the architect and construction engineer. Reasons for this are tougher requirements on fire safety regulations in these bu ildings as well as the absence of sufficient realized examples and design tools for the proof of performance of vibrat ion control and sound insulation. In a current project [1] these design tools shall be further developed by using a combination of FEM and SEA for the proof of perform ance. KW - Vibro-acoustical design KW - Multi-Storey Buildings Y1 - 2018 ER - TY - CHAP A1 - Rabold, Andreas A1 - Düster, A. T1 - FEM based prediction model for the impact sound level of floors T2 - EURONOISE 2008- Conference Proceedings N2 - Up to now the research and developmen t in the field of building acoustics is based mainly on measurements. The consequence is that the development and optimization of a new building component is a very tedious and expensive task. A considerably reduction of these costs could be achieved, if the optimization relying on measurements would be replaced – at least to some extent – by a computational prediction model. Motivated by these aspects a method is presented for using finite element techniques to estimate the impact sound level from lightweight floors. The overall approach consists of the three-dimensional modeling of the structure and the excitation source (tapping machine), the subsequent moda l- and spectral analyses an d the computation of the radiated sound from the ceiling. KW - Building acustics KW - Lightweight floors Y1 - 2018 ER - TY - CHAP A1 - Rabold, Andreas A1 - Düster, A. A1 - Hessinger, J. A1 - Rank, E. T1 - Optimization of lightweight floors in the low frequency range with a FEM based prediction model T2 - DAGA Tagungsband N2 - The impact noise transmission at low frequencies is a well known problem of lightweight floors, which is treated in many publications. A satisfying solution, considering the different construction principles of lightweight floors, could not be found so far. To overcome this problem a FEM based prediction model for the optimization of the floor construction and the improvement of the impact sound insulation has been developed and applied in a current research project at th e TU München. The details of the prediction model were published in [1]-[3]. This contribution gives an overview of the prediction model and shows the results of the computations and the construction rules developed for optimized lightweight floors. KW - Building acustics KW - Lightweight floors Y1 - 2018 ER - TY - JOUR A1 - Rabold, Andreas A1 - Buchschmied, M. A1 - Duster, A. A1 - Müller, G. A1 - Rank, E. T1 - Modelling the excitation force of a standard tapping machine on lightweight floor structures JF - Journal of building acustics N2 - Up to now the research and development in the field of building acoustics is based mainly on measurements. In consequence the development and optimization of a new building component is a very tedious and expensive task. A considerable reduction of these costs could be achieved, if the optimization relying on measurements would be replaced – at least to some extent – by a computational prediction model. For these models it is necessary to represent not only the component and the adjacent rooms but also the excitation in a suitable way. This paper gives an overview of models for the excitation generated by a standard tapping machine taking into account the interaction between the impacting steel cylinders of the tapping machine and the vibrating surface of the floor. KW - Tapping Machine KW - Lightweight floors Y1 - 2018 ER - TY - JOUR A1 - Mayr, Andreas R. A1 - Nightingale, T.R.T. T1 - On transmission of structure borne power from wood studs to gypsum board mounted on resilient metal channels – Part 1: Force and moment transmission JF - Canadian Acoustics N2 - The assumptions relating to power flow as a function of position and number of fasteners between the gypsum board and RC's was examined. It was observed that studs had both a rotational and translation motion but the translation displacement coupled more strongly than rotation. It was also observed that if the rotation velocity was less than or equal to the translation velocity, then structure borne transmission due to the rotation component could be ignored for frequencies below 2500 Hz. The results show that there is little effect associated with either the location or the number of fasteners attaching the gypsum board to the RC's about 315 Hz. KW - Approximation Theory KW - Frequencies KW - Functions KW - Power transmission KW - Radiation Y1 - 2004 IS - Vol. 32/3 ER - TY - CHAP A1 - Mayr, Andreas R. A1 - Gibbs, Barry A1 - Fischer, Heinz Martin T1 - Consideration of vibration sources in buildings on a power basis T2 - 13th International Congress on Sound and Vibration, ICSV13, Vienna, Austria, July 2006. KW - Vibration sources KW - Sound measurement Y1 - 2006 ER -