Dieter Brüggemann

TL;DR: In this paper, a software has been developed to find thermodynamic suitable fluids for ORC in biomass power and heat plants, where the highest efficiencies are found within the family of alkylbenzenes.

TL;DR: In this paper, the authors compared series and parallel circuits of an ORC and an additional heat generation for geothermal resources at a temperature level below 450 k. The results showed that due to a combined heat and power generation, the second law efficiency of a geothermal power plant can be significantly increased in comparison to a power generation.

TL;DR: In this article, the authors present detailed simulations of organic Rankine cycle processes for energy conversion of low-enthalpy geothermal resources, where the working fluids considered in this analysis are zeotropic mixtures, and the efficiency of subcritical cycles is calculated for isobutane/isopentane and R227ea/R245fa depending on mixture composition, heat source temperature and temperature difference of cooling water.

TL;DR: In this paper, the melting process of industrial grade paraffin wax inside a shell-and-tube storage is analyzed by means of numerical simulation and experimental results, and the enthalpy porosity method is extended by a continuous liquid fraction function.

TL;DR: It is shown that freezing of coarse grid source terms including spatial derivatives and restriction damping in regions of high chemical activity may remedy the problem of strong nonlinear source terms in species, turbulence, and variance conservation equations.