Aspects of Green Hospital Approaches with a Focus on Developing ...

Integrated energy system
Material and Methods
In developing countries an uninterrupted power supply isn’t guaranteed. Both in town
and in rural areas a self-sufficient energy supply is reasonable. Another requirement is
low running costs and easy technologies. The most underestimated part is to develop an
appropriate human concept. In most cases experts from industrial coutries bring hightechnology
stuff <strong>with</strong>out an adequate training <strong>of</strong> locals, who are running these systems.
Therefore we present the recommended practice for developing an energy strategy in
developing countries [Figure 1].
Figure 1: Our sustainable energy strategy is divided in the human and technical concept. Especially
the human part is mostly underestimated.
Energy self-sufficient system
Der Minassians [3] and He and Sanders [4] has shown in their work that its possible to
built up a low-temperature stirling engine <strong>with</strong> electrical power output about 2,5 kW.
The Sunvention company developed a running stirling engine which delivers 1,5 kW.
The principle <strong>of</strong> their concept is to heat up water to 150° and store it in a hot reservoir.
For the cold reservoir ground water is used. A stirling engine uses this temperature
difference to generate mechanical energy to run an electrical generator. This engine
doesn’t burn up fossil fuels and produces no emission. The working gas inside is typically
air or helium. Water is also not wasted because it is a sealed, closed cycle system.
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