Kastrinogiannis (Crete)

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1. Built example

A solar system has been built to increase the energy efficiency of the process.

2. Industry Sector

Textile industry; 50 employees

3. Industrial application

Heating water for textile dyeing

4. Process description

• Process flowsheet:

No information is available.

• Processes:

The hot water from the solar collectors heats the water in two open 5000-litre solar storage tanks through a closed loop (via a heat exchanger). The hot water leaving the solar storage tanks is either a) fed directly to factory floor or b) used to pre-heat the water entering the steam boiler. The auxiliary heating required depends on the process and the temperature of hot water required by the particular process (maximum: 900C)

Backup heating:

a) 1 steam generator (13 hp) – Heavy oil

b) 1 steam boiler (6 hp) – Heavy oil

Maintenance requirements:

Solar storage tanks were insulated due to large heat losses during the initial operation of the system.

5. Energy flows and temperature ranges

• Main heat supply system and fuel:

No information is available.

• Energy consumption (Sankey):

No information is available.

• Temperature ranges and other parameters:

Process hot water requirements of Kastrinogiannis S.A

Factory operation hours  : 0800 –1500 daily, closed on weekends

Water consumption  : a) Process water: 15,350 litres/day

Temperature of process water  : a) 40 – 90 0C

6. Solar Thermal Plant

• Used scheme:

No information is available.

• Description of the main features and components:

Supplier  : FOCO S.A Year of installation

1993 Area of Collectors

180 m2 Tilt

400 due South Hydraulic circuit

Closed-loop water-ethylene glycol Volume of solar storage tank

2 x 5000 litres (in parallel)

• Pictures of the built solar system:

No pictures available.

7. Energy savings

• Pinch analysis results:

No information is available.

• Energy savings:

Significant energy savings for textile dyeing process.

8. Economic evaluation

• Economic parameters of the built solar system:

Financing technique: 50 % public subsidy, no TPF/GSR contract

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