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Concept of Energy Supply


(a click to the sub-title leads to the article section)
  1. Frame Conditions
  2. Energy Requirements
  3. Mission and Goals of the Energy Concept
  4. Actions and Solutions
  5. Capital Expenditure
  6. Block Diagram

1. Frame Conditions

2. Energy Requirements

Based on the operation of the old hut we have known the experienced data of the "direct" energy consumers, f.i. ropeway operation, water pump, lighting system, cooking and washing. heating was mostly in the area of the hutkeeper with the woodstove of the kitchen (it was also used to produce a little amount of hot water for the kitchen and personnel). The two tiled stoves in the dayroom (the only heating sources of the old hut) had been used not often and not sufficiently. For cooking also liquid gas was used.

The "indirect" energy consumption of the hut in the environment had been about 1700 liters of fuel ( f.i. for the daily one, mostly two transports of personnel from Benediktbeuern to the base station of the ropeway, the daily supply rides of the hutkeeper for fresh food, the weekly supply rides for the delivery of drinks - cooled and in bottles).
Hypothesis: 23 km forrest road and 500m height per ride.
The direct and indirect energy requirement of the old hut were used as a base for the planning of a new ecological overall concept of the new hut and also for a new energy concept.
The daily energy requirements has been 40 kWh electrically and 90 kWh thermically.

3. Mission and Goals of the Energy Concept

4. Actions and Solutions

During longlasting model-calculations specialists have together experienced the theoretically best way of solutions. Because of the additionally necessary requirements the overall energy requirements rarely can be reduced, but will be shifted more to the direct energy requirements. The produced energy will be optimally used with the latest state of the art.

The usable power for the hut has been doubled to times before. The pollution could be reduced to 30 percent compared to the installations before (in spite of increasing the power!).

Destruction of environment by transports of dangerous goods will be avoided.
The success of the new energy concept will be fully reached first after all included people have changed their working procedures and loved habits, which mostly were aimed to economy, to the goals of a ecologically beneficial hut operation.

4.1 Reduction of Energy Consumption

Based on the actual conditions, carefully was checked which energy consumer could be avoided because alternative possibilities exist. With the operation concept of the Tutzinger Hütte the result shows the following picture:

Avoidable Consumer of electric current

Device Remark
Coffee percolator Hotel infusion device with cooked water from the gas stove
Microwave With fresh food and corresponding menue not necessary
washer, dryer, iron pressing Light sleeping bag mandatory; rest laundry ecologically beneficial finished down in the valley
Electric refrigerators Gas driven refrigerators because gas directly and low priced available
Electric heating Underfloor heating driven by BHKW and wood stoves in the side building or self-supplier-room
Electric cooker Gas stove
Electric boiler Hot water from warm water container; cooked water from gas stove
Dish washer with heating Hot water from warm-water-container which is fed by the block-heating-generator (BHKW)

Necessary Consumer of electric current

Device Consumption Remark
Ropeway 1 to 4 kWh three phase current about 4 rides daily
Drinking water pump 2 x 0.4 kWh three phase current  
Degermination 0,72 kWh / day  
Refrigeration engineering 3 x 0,7 kW three phase current 1 of 3 alternating,
14 hours daily
Heating/Warmwater 0,3 kW steady power
Dedector 110 V DC 3,85 kWh at 35 A during loading phase, Rest for consumer
3 Phase inverse rectifier, light, telephone converter,
smoke alarm, rescue guard, emergency illumination
0,3 kW base consumption
Vacuum cleaner 0,9 kWh  
Dung water pump 2 kWh Drehstrom 1 x yearly at season end
Ventilator (kitchen), small kitchen devices 0,3 - 0,5 kW when necessary at intense activity 2 hours
Hotwater dishwasher 0.3 kW three phase current at intense activity ca. 2 hours per day

4.2 Procedure with the draw-up of the energy concept

4.3 Components of the Energy Concept

block heating generator, backside

block heating generator,

block heating generator, frontside

block heating generator,

base station ropeway

base station ropeway
gas tank and gase hose cognizable

4.4 Mechanism of the Energy Supply System

a new foto will be produced, please wait.
      Akku-Batterie 48 V

Photovoltaik device
    Photovoltaik on the roof

5. Capital Expenditure

Only for a part of the necessary activities frame-contracts could be fixed. Individual contracts were made f.i. for brickwork for the gas pipe ( base for the gas tank, ropefixing, a.s.o.), shifting of the switchboards, increasing of the control ingeneering, service works and some smaller additions. Especially proplematic was to keep in order the parallel operation of the supply engineering (ropeway, drinking water, electric power) without break.

6. Block Diagram of the Energy Supply

Block Diagram of energy supply

Draft: Ingenieurbüro Dipl.-Ing. Phys. Michael Berger, Garmisch-Partenkirchen
Drawing: Ulf Schreglmann