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SolarCooling Monitor - Evaluation of energy efficiency and operation modes of solar cooling systems for air-conditioning in buildings in Austria
From 2007 to 2009 16 new solar cooling plants for building air-conditioning have been installed. Within this project an overview of the current installation quality of solar cooling plants in Austria as well as the efficiency and operation performance should be given. Therefore, ten of the newly installed solar cooling plants in Austria and a large scale plant in Lisbon have been selected for evaluation.
Titel und Synopse
In den Jahren 2007 bis 2009 wurden in Österreich 16 neue solarthermische Kühlanlagen zur Gebäudekühlung errichtet. Im Rahmen dieses Projektes soll ein Überblick sowohl über die derzeitige Ausführungsqualität von solaren Kühlanlagen in Österreich als auch zur Energieeffizienz und Betriebsverhalten geschaffen werden. Es wurden dafür zehn der neu installierten solarthermischen Kühlanlagen in Österreich und sowie eine Großanlage in Lissabon zur Evaluierung ausgewählt.
Project description / tasks
Status
ongoing
Summary
Starting point / motivation
To achieve the leap from passive houses with high energy efficiency to so-called ‘Energy-Plus-Buildings', the integration of renewable technologies for heating and cooling is necessary. In addition, a reduction of the heating and cooling needs of the building shall be achieved. Solar thermal cooling offers a large potential of saving CO2 during the operation of the air conditioning in buildings, to avoid the current summer peak and to save primary energy. At present, three technologies are available in the market:
- Absorption cooling systems
- Adsorption cooling systems
- DEC-systems (Desiccant Evaporative Cooling)
All three technologies were already implemented in pilot plants in Austria and use the seasonal simultaneousness of cooling loads and solar irradiation, as well as the possibility of multiple uses of solar energy for solar cooling, space heating and domestic hot water preparation.
Present problem definitions:
- At present, there is still hardly any experience in the operation of solar cooling systems in Austria. Since experiences of plants in operation are missing, empirical values of a monitoring (if at all available) only give a partial explanation about the plant efficiency. In particular, this is also valid for the peripheral power consumers such as pumps, fans etc. A comparison of the actual values according to monitoring with desired values from a dynamic simulation could make this possible.
- Plant owners invest much money into the solar thermal cooling installation. They are often missing professional evaluation of the functionality and optimisation of the plants.
- To learn from these plants for future larger numbers of installations a concentrated measuring and evaluation campaign with competent partners for quality assurance is necessary.
Contents and goals
The project´s aims are
- to provide an overview of the present quality of workmanship of solar cooling plants in Austria
- to increase the know-how about plant operation of solar cooling systems already in operation (plants in Austria and one large-scale installation in Lisbon)
- to develop dynamic simulation models for solar cooling of buildings
- the alignment of simulation results of solar cooling with actually measured plant performance
- to set up reference values for primary energy saving and CO2-saving by means of simulation of reference systems with conventional cooling technologies and exemplary measurements
Methods of treatment
Ten of the recently installed solar thermal cooling plants in Austria were selected, as well as a large-scale installation in Lisbon (Austrian plant engineering and construction company) in order to examine the performance by means of simulation and monitoring. Herewith, important results of the present status of solar cooling systems in buildings should be pointed out and optimisation potentials for a next generation of solar cooling systems should be identified.
The project at hand is based on the know-how and efficient network of the IEA SHC Task 38 "Solar Air Conditioning and Refrigeration" of the Implementing Agreements on Solar Heating and Cooling.
In addition, by intensive co-operation with international experts in the context of the IEA SHC Task 38 the chance of bringing international experience with this technology as rapidly and efficiently as possible to Austria can be taken.
Project partners
Project management
Ing. Anita Preisler
AIT - Austrian Institute of Technology, Energy Department, Vienna
Project or cooperation partner
- ASIC - Austria Solar Innovation Center, Wels
- AEE-INTEC, Gleisdorf
- Graz University of Technology - Institute for heat engineering
- SOLID, Graz
Contact address
AIT - Austrian Institute of Technology, Energy Department
Ansprechperson: Ing. Anita Preisler
Giefinggasse 2, A-1210 Wien
Tel.: +43 50550-6634
Fax: +43 50550-6613
E-Mail: anita.preisler@ait.ac.at
