The advantages and problems of different types of artificial feeding are discussed. For patients needing long-term nutritional support, we see the following special advantages of PEG: physiological enteral nutrition with an only small risk of tube dislocation, no additional handicap of the natural swallowing procedure and without stigmatizing the patient by an external visible tube (Tab. 3). To help to spread this method of artificial feeding for the benefit of the patient, this article gives some informations on how to cope with the problems that might occur when using PEG (for example: a diet plan for building up the tube food nutrition (Tab. 4).

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Die Neu-und Weiterentwicklung ron regenerativen Technologien, wle die Nutzung von Wind-, Biomasse-und Solarenergie sowie die der Brennstoffzelle, werden in den n~ichsten Jahren die Energielandschaft ver~indem. Insbesondere Photovoltaikanlagen und kleine Brennstoffzellen-BHKW werden aro Niederspannungsnetz angeschlossen. Neben den wirtschaftlichen Aspekten werden die technischen Anschlussbedingungen untersucht, wobei insbesondere die vorhandenen Netzkapazit~iten und die erforderlichen Schutzeinrichtungen betrachtet werden. AnschlieBend wird ein Energiemanagementsystem vorgestellt, in dem die speziellen Anforderungen fª die dezentralen Energieumwandlungsanlagen (DEA) berª werden. Schlª dezentrale Energieversorgung; Brennstoffzellen; Photovoltaikanlagen; Netzimpedanz; EnergiemanagementTechnical and economical aspects of decentralized energy conversion systems in lowvoltage networks. The development of regenerative technologies, e. g. wind-, biomasses-, solar-energy and fuel cells will change the energy-consumption-structure in the next few years. Especially photovoltaic and small fuel cell systems will be connected to the low-voltage-network. In addition to economic aspects, the technical supply conditions are being researched, e. g. the grid-capacity and the needed protective units. At the end, an energy management system, which handles all special requests caused by decentralized energy conversion systems, will be presented.