Presentation Title Date xx, 2004

1
BENEDIKT V SLOVENSKIH GORICAH, SLOVENIA Peter
KRALJ GEJZIR d.o.o.
Building and Use
Heating Cooling System
Heat Pump
building photo
heat pump photo
photo 1
Basement First floor The
Culture Centre Benedikt is used by local
community for cultural events. It si a domicile
and office of various non-profit associations and
organisations. Total area of the building
290,44 m2 Ground plan dimensions 13,70 x 21,20
m Net area of all rooms and auditorium 328,44
m2 Aver. annual air temp. (Maribor) 11,7 ºC
(2007) Ext. annual air temp. (Radenci) -10 ºC
(2008) 34 ºC (2008) Heat power demand
20,3 kW Cooling power demand 19,2
kW
photo 2
Energy Performance
GMWW 23 HK plus Performance data normal mode
W10/W35 W10/W50 Heating
capacity 22,6 kW 20,5
kW Cooling capacity 18,9 kW
15,6 kW Power consumption 3,7 kW
4,9 kW Coeff. of performance 6,1
4,2 Drawn current 7,1 A
8,8 A Performance data reverse
mode   W10/W18 Cooling capacity 23,1 kW Waste
heat capacity 26,5 kW Power consumption 3,4
kW Coefficient of performance 6,8 Drawn
current 6,4 A Compressor Type
Fully-hermetic/scroll Number 1 units Max.
operating current 11,5 A Starting current 62,2
A Max. starting current w/ discharge 31,1
A Evaporator  Type Flat-plate heat
exchanger Material Stainless steel
1.4401 Number 1 units Max. operating pressure
(brine) 6 bar Max. operating
pressure (refrigerant) 30 bar Internal
pressure difference 17 bar
Heating and cooling system scheme
Active heating and passive and active cooling
enables flexibility and energy efficiency. Active
cooling is used only during peak demand when
passive cooling is insufficient. Passive cooling
is particularly interesting in the winter season
when the auditorium has to switch from the
heating- to cooling modus, and the rest of the
building must undergo a continuous heating.
Circulation pumps in the heating loop heat the
rest of the building, and the required heat is
consumed from the storage tank, whilst the
auditorium loop changes to the direct cooling
modus. After the end of event normal regime is
established.
Borehole Heat Exchanger
Monthly Energy Delivered
Monthly loads   Total loads kWh    
Heating Cooling January 7.285  
February 6.580   March
5.099   April 2.914  
May 1.093 134,4
June   230,4 July   307,2 August   153,6
September   307,2 October 4.371  
November 5.828   December 7.285  
BHE field photo
Heating Cooling System
3 Double-U BHEs with PE Ø 40 mm pipes and lengths
166 m, 97 m and 126 m. Soil Parameters General
soil profile sandy (clayey) silt Estimate of
conductivity 2 W/mK Estimate of volumetric
heat 2,600 kJ/Km3
Active heating and passive and active cooling is
planned.