TY  - JOUR
A1  - Göttsche, Joachim
A1  - Goetzberger, Adolf
A1  - Dengler, J.
A1  - Rommel, M. (u.a.)
T1  - A new transparently insulated, bifacially irradiated solar flat-plate collector / A. Goetzberger ; J. Dengler ; M. Rommel ; J. Göttsche ; V. Wittwer
JF  - Solar energy. 49 (1992), H. 5
Y1  - 1992
SN  - 0038-092X
SP  - 403
EP  - 411
ER  - 
TY  - CHAP
A1  - Schwarzer, Klemens
T1  - A new kind of efficient solar cookers with and without temporary heat storage
T2  - Advances in solar cooking : proceedings of the First World Conference on Solar Cooking, Stockton, California, USA, June 19 - 20, 1992 / ed. by Edwin Pejack
Y1  - 1992
SP  - 107
EP  - 112
PB  - Solar Box Cookers International
CY  - Sacramento, Calif.
ER  - 
TY  - CHAP
A1  - Kreyer, Jörg
A1  - Müller, Marvin
A1  - Esch, Thomas
T1  - A Map-Based Model for the Determination of Fuel Consumption for Internal Combustion Engines as a Function of Flight Altitude
N2  - In addition to very high safety and reliability requirements, the design of internal combustion engines (ICE) in aviation focuses on economic efficiency. The objective must be to design the aircraft powertrain optimized for a specific flight mission with respect to fuel consumption and specific engine power. Against this background, expert tools provide valuable decision-making assistance for the customer. In this paper, a mathematical calculation model for the fuel consumption of aircraft ICE is presented. This model enables the derivation of fuel consumption maps for different engine configurations. Depending on the flight conditions and based on these maps, the current and the integrated fuel consumption for freely definable flight emissions is calculated. For that purpose, an interpolation method is used, that has been optimized for accuracy and calculation time. The mission boundary conditions flight altitude and power requirement of the ICE form the basis for this calculation. The mathematical fuel consumption model is embedded in a parent program. This parent program presents the simulated fuel consumption by means of an example flight mission for a representative airplane. The focus of the work is therefore on reproducing exact consumption data for flight operations. By use of the empirical approaches according to Gagg-Farrar [1] the power and fuel consumption as a function of the flight altitude are determined. To substantiate this approaches, a 1-D ICE model based on the multi-physical simulation tool GT-Suite® has been created. This 1-D engine model offers the possibility to analyze the filling and gas change processes, the internal combustion as well as heat and friction losses for an ICE under altitude environmental conditions. Performance measurements on a dynamometer at sea level for a naturally aspirated ICE with a displacement of 1211 ccm used in an aviation aircraft has been done to validate the 1-D ICE model. To check the plausibility of the empirical approaches with respect to the fuel consumption and performance adjustment for the flight altitude an analysis of the ICE efficiency chain of the 1-D engine model is done. In addition, a comparison of literature and manufacturer data with the simulation results is presented.
Y1  - 2020
U6  - https://doi.org/10.25967/490162
N1  - 68. Deutscher Luft- und Raumfahrtkongress 30.09.-02.10.2019, Darmstadt
PB  - DGLR
CY  - Bonn
ER  - 
TY  - CHAP
A1  - Teixeira Boura, Cristiano José
A1  - Eckstein, J.
A1  - Felinks, J.
A1  - Göttsche, Joachim
A1  - Hoffschmidt, Bernhard
A1  - Schmitz, S.
T1  - 3-D CFD simulation of an air-sand heat exchanger
T2  - SolarPACES 2011 : concentrating solar power and chemical energy systems : 20 - 23 September, 2011, Granada, Spain
Y1  - 2011
CY  - Granada
ER  -