15.07.2015   EuroSun2008-10

Validation of the test sequence for the reference system with different characteristics

For each hydraulic scheme, different size of the collector area (from 5m2 to 25 m2) and heat store volume (from 400 litres to 1500 litres) were used. In order to know if the optimised test sequence is also suitable for other reference buildings (SFH30, SFH100) further simulations with varying solar combisystem sizes were carried out.

Storage volume (l)

Collector

area (m2)

Auxiliary consumption for heating and domestic hot water based on :

Difference

(%)

Annual simulation (kWh)

Test sequence and extrapolated to an annual value (kWh)

400

8

12531

12574

0.34

400

10

12289

12160

-1.06

600

8

11855

11772

-0.7

600

12

11263

11054

-1.89

800

12

10943

10647

-2.78

800

16

10458

10221

-2.31

1000

12

10779

10510

-2.56

1000

20

9835

9660

-1.81

1500

20

9507

8931

-6.45

Table 3. Comparison of the auxiliary consumption for an annual simulation, and for the prediction based on the result of the test sequence (The results in the table are related to the Zurich climate conditions and a single family house with a 60 kWh/m2.year space heating demand).

Подпись: Auxiliary energy used for the reference Solar Combisystem 5 000 7 000 9 000 11 000 13 000 15 000 17 000 19 000 21 000 23 000 25 000 Annual consumption (Kwh) 25 000

23 000

21 000 A

19

Fig. 3. Predicted consumption with the test sequence versus annual consumption for Zurich climate and the

reference Solar Combisystem.

Although the test sequence was optimised for the SFH60 building, the results from building type SFH100 and SFH30 are promising. Moreover the criteria chosen to select the days are working for different climates.

For Zurich climate it can be seen that predicted and annual simulation values are close to each other. Best results can be achieved in case of building type SFH100. On the other way for Stockholm climate best results are obtained for building type SFH60.

Похожие посты: