Bodo Groß

• Dr.
• Group Leader at IZES gGmbH

The present work performed in the context of a research project called AMELi ("Analyse von Machbarkeit, Effizienz und Wirtschaftlichkeit von Luft-Erdwärmetauschern als Wärmequelle für Luft/Wasser-Wärmepumpen“). The objective is to investigate the efficiency of an air-soil heat exchanger (EAHX) as a heat source for an air source heat pump (ASHP) in...

The central idea of the LEXU+ project is the development of prefabricated, self-supporting sandwich facade elements for the renovation of existing buildings. The sandwich facade elements consist of two active layers separated by thermal insulation layer and can both generate environmental energy and actively reduce the heat loss of adjacent rooms o...

The dynamic production of green energy requires capable mediate storage solutions, often in the form of large batteries. Here, a Vanadium Redox Flow Battery is used to collect solar panels’ energy and, later, power electric vehicles. Since the balance of the chemical liquids inside the battery can change over multiple loading cycles, a system for p...

This work aims at investigating the impact of an Earth-Air Heat eXchanger (EAHX) on the thermal comfort when it is added to a natural nighttime ventilation for a house located in Marrakech (Morocco) which is characterized by a hot semi-arid climate. The thermal behavior of the house associated with this cooling combination was assessed using dynami...

This work aims to investigate the impact of an Earth- to Air Heat eXchanger (EAHX) combined with natural nighttime ventilation on the thermal comfort conditions of a house located in Marrakech (Morocco) which is characterized by a hot semi-arid climate. The thermal behavior of the house associated with the EAHX combined with nighttime ventilation w...

This work aims at investigating the buildings' air heating and cooling potential of an Earth to Air Heat exchanger (EAHX) in the context of two European climates. A reference building called “SFH45” (single-family house) is chosen for this purpose. The thermal behavior of SFH45 building integrating the EAHX was studied by means of dynamic simu...

The use of primary measures to reduce particulate matter, CO, and NOx emissions can be feasible for pellet boilers fired with a standardized fuel with low quality variations. At the same time, the use of lower‐quality pellets such as A2 or I2 can be realized without the need for secondary emission reduction measures. Here, the possibility of partic...

Im Rahmen der Forschungsprojekte „LEXU” und „LEXU II” der IZES gGmbH wurde eine außenliegende Wandtemperierung (aWT) entwickelt und erprobt. Bei der außenliegenden Wandtemperierung handelt es sich um eine niederexergetische Flächentemperierung, die zwischen Bestandswand und neuem Wärmedämmverbundsystem (WDVS) aufgebracht wird. Es ist somit ein Sond...

Due to the growing number of small biomass boilers in residential buildings, the ash from these plants is increasing. In order to find a beneficial use of these ashes, chemical and physical analyses were carried out on different ash fractions of different boilers. The results enable a comparison of the used boilers and fuels. As a result, it has be...

Im Rahmen der Forschungsprojekte „LEXU“ und „LEXU II“ der IZES gGmbH wurde eine außenliegende Wandtemperierung (kurz „aWT“) entwickelt und erprobt. Bei der außenliegenden Wandtemperierung handelt es sich um ein niederexergetisches Temperierungssystem, das in Form von wasserführenden Rohren zwischen Bestandswand und neuem Wärmedämm‐Verbundsystem (WD...

With the intention of developing an electrostatic precipitator (ESP) for small-scaled biomass boilers, several laboratory and field tests were carried out to transfer the theoretical design criteria and approaches into practice. The precipitator can be applied both, as a direct integrated version or as an adaptive precipitation box. Another main ai...

Stationary fuel cell power systems have the potential to make a substantial contribution in a power supply system with a rising share of renewables and decentralized energy production. The article examines the technological development in the two world’s leading countries Germany and Japan. For this purpose, the numbers of installations that are ac...

During the development of an electrostatic precipitator, several physical effects could be observed. In order to be able to understand these observations and to develop an optimised electrostatic precipitator, it is of prime importance to understand the ground laying physical processes of an electrostatic precipitation. The following work starts wi...

In Germany the energy revolution is in full progress and affects the country in general. One answer to the necessary change away from fossil fuels towards renewable energies will be biogas. The biogas boom in Germany now lasts for nearly two decades. Starting with a general overview concerning the biogas market as well as the overall biogas product...

Apart from natural gas there is another important natural source of methane. The so-called coal mine gas is a by-product of the geochemical process of the carbonization of sediments from marsh woods of the Earth's Carboniferous Period. Methane evaporates from the coal and has to be removed out of the active mines where it represents one of the main...

Because of its potential harmful impact on the environment, disposal of sewage sludge is becoming a major problem all over the world. Today the available disposal measures are at the crossroads. One alternative would be to continue its usage as fertiliser or to abandon it. Due to the discussions about soil contamination caused by sewage sludge, som...

SaarEnergie (SE) GmbH, Forschungszentrum Jülich, and Institut für ZukunftsEnergie-Systeme are partners in a project titled ‘Pilot operation of a high-temperature solid oxide fuel cell (SOFC) using mine gas,’ which was launched in November 2003.As a first step in this project, the quality of the mine gas was analysed at the intended installation sit...

A discussion covers lean (poor, weak) gas grids in terms of introduction; possible types of gases that can be used in regional lean gas grids; the regional gas grid in the Saarland (substitution possibilities; obtaining and composition of synthesis gas by gasification; obtaining and composition of biogas from fermentation; removal of pollutants; bi...

Nanocrystalline BaZr0.85Me0.15O2.925 (Me=Y, In and Ga) and also undoped BaZrO3 powder samples with crystallite sizes of Dvol=7 nm were prepared using a sol–gel-type hydrolysis in microemulsion-provided nanoreactors. High-resolution transmission electron microscopy (HR-TEM) and X-ray spectrochemical analysis were applied to investigate morphological...

FOCUS is a time and space focusing time of flight spectrometer for cold neutrons at the Swiss Spallation Neutron Source SINQ at Paul-Scherrer Institute. The instrument can be operated either in time focusing or monochromatic focusing conditions, such that it can be optimized for quasielastic and inelastic neutron scattering experiments, respectivel...

A novel preparation technique for catalyst layers used in Proton-Exchange-Membrane Fuel Cells is presented. This method enables a selective electrochemical deposition of platinum nanoparticles on those surface areas of the carbon support which are in contact with the proton and electron conducting phases and simultaneously with the gaseous or liqui...

A preparation method for catalyst layers of platinum nanoparticles, as used in direct methanol fuel cells, based on pulsed electrochemical deposition within the three-phase boundary regions responsible for electrochemical reactions, was developed. A platinum precursor was brought into a carbon–Nafion layer and platinum was deposited in situ on the...

Thin films of proton-conducting BaZr0.85Y0.15O2.925 perovskite-type ceramics, prepared in a sol–gel process by multiple dip-coating on silicon single crystal wafers, and powder samples, prepared by the conventional carbonate route, were charged with hydrogen by dissociative water absorption at definite values of water vapour pressures and temperatu...

Thin films of Ba3Ca1.18Nb1.82O8.73, prepared in a sol-gel process by multiple dip-coating on silicon wafers, and powder samples, prepared by the conventional carbonate route, were charged with hydrogen by dissociative water absorption at definite values of water vapour pressure and temperature. The hydrogen content was determined ex situ at room te...

Thin films of Ba3Ca1.18Nb1.82O8.73, prepared in a sol–gel process by multiple dip-coating on silicon wafers, were charged with hydrogen by dissociative water absorption at definite values of water vapour pressures and temperatures. The hydrogen content was determined using nuclear resonance reaction analysis. From the resulting water vapour pressur...