IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask A Report A-D3b, Date: December 2010
2.2 Austria: Bachler, Gröbming
Description of the application
Absorption chiller with open wet cooling tower to cool 700 m² office building with a peak
cooling load of 8 kW.
Type of building office building
Location Gröbming, Austria
In operation since 2007
System operated by Bachler HVAC company (own
office building)
Air-conditioned area 700 m 2
System used for space heating? Yes
System used for DHW preparation? Yes
General description of the system
Closed cycle absorption with ammonia/water as working pair. The system has biomass as
auxiliary heating for heating and for the absorption machine.
The building is an office building for a HVAC company with 700 m² cooled office area. The
peak cooling load of the building is 9 kW and the building is cooled via concrete core
activation.
The building has mechanical building ventilation with heat recovery.
The heat rejection is wet, open EWK Axima refrigeratoin with 25 kW.
Central air-conditioning unit
Technology
closed cycle
Nominal capacity
12 kW cold
Type of closed system
Absorption
Brand of chiller unit PINK chillii PSC 12
Chilled water application
Chilled ceilings
Dehumidification
no
Heat rejection system
Wet open
Solar thermal
Collector type
flat-plate
Brand of collector
“Neuma-Solar” in Kremsmünster, Austria
Collector area
46 m 2 aperture area
Tilt angle, orientation
45°, south
Collector fluid
water-glycol
Typical operation temperature 80 °C (driving heat for cooling application)
The solar collectors are partly mounted on the ground, partly installed on the façade of the building.
The system is operated with a variable flow control.
Configuration
Heat storage
Cold storage
Auxiliary heater
3*1.5m³ water
none
Biomass, 150 kW
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