Eberhard (Austria)

Back to EFFICIENCY FINDER FOR METAL INDUSTRY

Back to Information about iron

1. Solar integration

No solar plant has been built yet. The first step was to find possibilities for heat-recovery and energy efficiency.

2. Industry Sector

(Surface) treatment of metals

3. Industrial application

Solar application: water heating for the black-finishing baths and maybe for heating the production halls

4. Process description

• Process flowsheet:

• Processes:

Black finishing:

5. Energy flows and temperature ranges

• Main heat supply system and fuel:

Main fuels: oil & electrical energy

Total electrical energy consumption: 80.000 – 100.000 kWh/a Electrical power: 250 – 270 kW

Total oil consumption: 103 litres/day 2006: 38.205 litres, heating value: 10 kWh/l  fuel heat capacity: 382.050 kWh

Thermal energy demand for black-finishing bath: 10.500 – 21.000 kWh (not exactly known)

Connection power for oil-heating: 140.000 kWh Heating demand that could be covered by heat-recovery: 420.000 kWh

• Energy consumption (Sankey):

• Temperature ranges and other parameters:

6. Solar Thermal Plant

• Used scheme: No information available.

Description:

The solar energy is used for direct after-heating of the black-finishing baths, because water-baths at low- and middle-temperature levels are ideal for integrating solar process heat. To integrate such a system, the plant engineering would have to be changed.

• Performance of the planned solar plant:

A solar plant for providing the required 21.000 kWh with 30% solar ratio has to have an area of 20 m² and will produce 7000 kWh/a. These numbers are not calculated, but are only experience-data.

• Pictures of the built solar system:

No information available.

7. Energy savings

• Pinch analysis results:

No information is available.

• Energy savings:

No information is available.

8. Economic evaluation

• Economic parameters of the built solar system:

Investing costs: ~ 10.000 € Promotion: 30%

Back to EFFICIENCY FINDER FOR METAL INDUSTRY

Back to Information about iron