IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at
IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at 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 - changing the switching operations between summer and winter to automatically by including the valves V3 and V4 in the controller - possibly rising the starting driving temperature in the control strategy if there are still problems with a clocking behavior of the chiller Photos Office building with solar collector field Technical premises Wet cooling tower and Pink chillii PSC12 in front of the building Pink chillii PSC 12 Monitoring Data Measured period Monitoring level (according to Task 38 procedure) Person responsible for monitoring Aug 2009 – ongoing 3 Daniel Neyer (University of Innsbruck UIBK, Austria) Phone: +43 512 507-6618 Email: daniel.neyer@uibk.ac.at page 12
IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask A Report A-D3b, Date: December 2010 2.3 Austria: SOLID Office Building, Graz Description of the application The office building of SOLID was renovated in 2004 and the solar cooling device was installed in the year 2008. The façade of the office rooms are south and west oriented. To reduce the solar gains external shading devices are installed at each glazing. Because of internal gains and ventilation via windows, active cooling is indispensable. The solar cooling equipment is installed in a so-called “Cooling Cabin” placed under a pergola which is situated in front of the office building as a nice main entrance. The solar collectors are installed on the roof of this pergola. The hybrid cooling tower is placed on the flat roof of the office building. The cooling load of the office rooms is taken out via ceiling cooling elements. Type of building office building Location Graz, Austria In operation since 2008 System operated by SOLID Air-conditioned area 435 m 2 System used for space heating? Yes System used for DHW preparation? No General description of the system A closed absorption cycle for generating cooling energy is employed. Autonomously solar thermal generated heat by high temperature flat plate collectors is used to regenerate the process. Within the absorption cooling machine water is used as refrigerant and lithium bromide is used as solvent. The cold water generated by the absorption cooling machine is used to cover internal and external heat gains and also the heat income caused by windowventilation in the office rooms. In winter the solar collectors are in assistance to the space heating. In summer and winter the solar generated heat is stored in one buffer storage and all energy demand is taken out of it. The additional heat from the district heating is not stored in the tank but directly carried to the space heating system. A special application is the usage of the hybrid cooling tower for direct cooling via the ceiling cooling elements. Central air-conditioning unit Technology Nominal capacity Type of closed system Brand of chiller unit Chilled water application Dehumidification Heat rejection system Solar thermal Collector type Brand of collector Collector area Tilt angle, orientation Collector fluid Typical operation temperature closed cycle 17.5 kWcold, 21 kW peak Absorption Yazaki WFC SC5 Chilled ceilings no Hybrid cooling tower High temperature flat-plate ÖkoTech Gluatmugl HT 60 m 2 gross area 11°, south water-glycol 88 °C driving temperature for chiller operation page 13
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<strong>IEA</strong> SHC Task 38 <strong>Solar</strong> Air Conditioning <strong>and</strong> Refriger<strong>at</strong>ion Subtask A Report A-D3b, D<strong>at</strong>e: December 2010<br />
- changing the switching oper<strong>at</strong>ions between summer <strong>and</strong> winter to autom<strong>at</strong>ically by<br />
including the valves V3 <strong>and</strong> V4 in the controller<br />
- possibly rising the starting driving temper<strong>at</strong>ure in the control str<strong>at</strong>egy if there are still<br />
problems with a clocking behavior of the chiller<br />
Photos<br />
Office building with solar collector field<br />
Technical premises<br />
Wet cooling tower <strong>and</strong> Pink chillii PSC12 in<br />
front of the building<br />
Pink chillii PSC 12<br />
Monitoring D<strong>at</strong>a<br />
Measured period<br />
Monitoring level (according to Task 38<br />
procedure)<br />
Person responsible for monitoring<br />
Aug 2009 – ongoing<br />
3<br />
Daniel Neyer (University of Innsbruck UIBK, Austria)<br />
Phone: +43 512 507-6618<br />
Email: daniel.neyer@uibk.ac.<strong>at</strong><br />
page 12
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