Center for Renewable Energy Sources in Koropi, Greece

Description of the application

The open cycle desiccant evaporative cooling system is used for demonstration and research purposes. It is used to heat and cool the solar thermal building at the P.E.N.A. demonstration site of C.R.E.S.

General description of the system

The system technology is open cycle desiccant evaporative cooling system. Heat is provided by a solar thermal system and by a back-up electric heater installed directly inside the hot water storage tank. In winter the solar thermal system supplies a water-air heat exchanger installed in the DEC system in order to heat the room. 

Central air-conditioning unit

Technology

open cycle (DEC)

Nominal air volume flow rate

1,100 m3/h

Minimum air volume flow rate

373 m3/h

Desiccant cooling system type

solid desiccant

Desiccant type

Lithium Chloride

Cooling capacity

- kW

Brand of desiccant unit

Klingenburg

Solar thermal

Collector type

flat-plate

Brand of collector

Calpak

Collector area

10 m2 gross

Tilt angle, orientation

45°, 0° west/east

Collector fluid

water-glycol

Typical operation temperature

60 °C (driving heat for cooling application)

Configuration

Heat storage

0.5 m3 water

Cold storage

none

Auxiliary heating support

electric heater

Use of auxiliary heating system

directly heats the hot water storage tank, used both for heating and cooling

Auxiliary chiller

no

System performance

This is a newly installed system, system performance has not been analyzed yet.

System reliability and overall success of the installation

The first weeks of operation have revealed a reliable system operation. No long-term monitoring data are available so far. The system is promishing, since no special and expensive components are used. The low driving temperatures allow the use of low cost flat-plate selective collectors.

General information

Type of building  Technology demonstration
Location  Koropi, Attiki
In operation since  2007
System operated by  CRES
Air-conditioned area  84 m2

Figures

Display of the unit
Caption 1
Chiller unit
Display of the unit
DEC machine (Front face is made with window openings for technology demonstration purposes)
Chiller unit
500 lt hot water storage tank and solar collector circuit’s hydraulics
DEC machine (Front face is made with window openings for technology demonstration purposes)
LiCl Sorption wheel (return pipe part)
500 lt hot water storage tank and solar collector circuit’s hydraulics
LiCl Sorption wheel, Lower side: fresh air inlet (with filters), upper side: air rejection fan
LiCl Sorption wheel (return pipe part)

Clicking an image opens the gallery view.


Specific information

Further specific information about the system are included in the filled in technical questionnaire.

GR02_DEC_CRES.pdf

1.1 M


Contact

For more information on the project please feel free to contact:

Vassiliki Drosou
drosou(at)cres.gr