News feed
X

Measured period.Winter 2012.10-2013.03

APARTMENT VENTILATION:

A.Working period regarding customer needs:

0.00-08.00: Hours with heating demand 954 h/period.

18.00-0.00: Hours with heating demand 647 h/period.

 

Total Ventilation working hours with heating demand: 1601h/year

 

B.Working period customised with energy savings calculations:

6.00-10.00  Hours with heating demand 504h/period.

22.00 -00.00 - Hours with heating demand 292h/period.

00.00-02.00- Hours with heating demand 211h/period.

Total hours with heating demand: 1007h

1m3 / h   Supplyair heating demand Temp   from-5,5 Cdegree –  to23 Cdegree

Perfomed savings: 37%

 

PASSIVE SOLAR SPACE HEATING

 

Passive solar space heating total.  -1156h/period

10.00-14.00 –Working period with cooling demand -557h/period

Over 50% passive solar space heating gathered.

Performed savings for heating: 19%

 

AIR-WATER HEATPUMP WITH HEATRECOVERY

Normal heating temperature – 35/45 – COP - 3,42

Redused heating temperature(including cooling coils for heating)-  30/40 – COP -3,86 

Performed savings: 11,3%

10.00-22.00 –working hours with defrost demand 1122 h/period

22.00-10.00- working hours with defrost demand  1337 h/period

10.00-22.00 – Average outdoor  Temp. 5,06 C degree and Humidity level RH - 65,55  - 4,06

Heatpump working hours 2904,5 h/period  among with defrosting hours 280,5h/period

Total heating 2624h – (defrost- 9,6%)COP 3,66

22.00-10.00 – Average outdoor  temp 2,56 C degree and Humidity level  RH - 64,70 – 3,86

Total heatpump working hours 2904,5h/period among with defrosting hours  334,25

Total heating 2570h –(defrost 11,5%) COP 3,41

Defrosting energy from geothermal source gathered 280, 5h/period

Perfomed savings: (3,42*0,885) COP 3,02  - COP 4,06 – 25,6%


Author

Indrek Pihtjõe