Professional Report

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Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.

Project COMPACT2 1000L

Location of the system

Switzerland

Rapperswil (SG)

Longitude: 8.82°

Latitude: 47.23°

Elevation: 417 m

This report has been created by:

Vela Solaris AG

System overview (annual values)

Total fuel and/or electrical energy consumption of the system [Etot]

5,346.1 kWh

Total energy consumption [Quse] 28,998.8 kWh

System performance (Quse / Etot) 5.42

Comfort demand Energy demand covered

Professional Report

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Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.

Overview solar thermal energy (annual values)

Collector area 99 m²

Solar fraction total 85.7%

Total annual field yield 25,999.7 kWh

Collector field yield relating to gross area 262.7 kWh/m²/Year

Collector field yield relating to aperture area 464.3 kWh/m²/Year

Max. fuel savings 3,059 l: [Heating oil]

Max. energy savings 30,587.9 kWh

Max. reduction in CO₂ emissions 9,196.9 kg

Solar fraction: fraction of solar energy to system [SFn]

Horizon line

Meteorological data-Overview

Average outdoor temperature 10.1 °C

Global irradiation, annual sum 1,103.5 kWh/m²

Diffuse irradiation, annual sum 578 kWh/m²

Component overview (annual values)

Boiler 1 Oil boiler, small

Power kW 15

Total efficiency % 81.2

Energy from/to the system [Qaux] kWh 4,320.8

Fuel and electrical energy consumption [Eaux] kWh 5,323.3

Energy savings solar thermal kWh 30,587.9

CO₂ savings solar thermal kg 9,196.9

Fuel savings solar thermal l 3,059

Professional Report

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Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.

Collector Collector field NSC-58-30

Data Source SPF

Number of collectors 20

Number of arrays 1

Total gross area m² 98.98

Total aperture area m² 56

Total absorber area m² 48.02

Tilt angle (hor.=0°, vert.=90°) ° 45

Orientation (E=+90°, S=0°, W=-90°) ° 0

Collector field yield [Qsol] kWh 25,999.7

Irradiation onto collector area [Esol] kWh 69,225.2

Collector efficiency [Qsol / Esol] % 37.6

Direct irradiation after IAM kWh 37,145.5

Hot water demand Constant

Volume withdrawal/daily consumption l/d 1,470.2

Temperature setting °C 45

Energy demand [Qdem] kWh 21,389.4

Pool Pool Outdoor pool

Pool type Outdoor pool

Length m 10

Width m 7

Average depth m 1.7

Energy from/to the system [Quse] kWh 6,664.9

External heat exchanger Pool heat exchanger Plate heat exchanger, small

Transfer capacity W/K 5,000

Pump Solar pump Pump Eco, small

Circuit pressure drop bar 0.015

Flow rate l/h 450

Fuel and electrical energy consumption [Epar] kWh 10.9

Pump Pool pump Pump Eco, small

Circuit pressure drop bar 0.002

Flow rate l/h 450

Fuel and electrical energy consumption [Epar] kWh 5.9

Pump Solar pool pump Pump Eco, small

Circuit pressure drop bar 0.042

Flow rate l/h 450

Fuel and electrical energy consumption [Epar] kWh 5.9

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Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.

Storage tank Hot water tank 2700l combined tank with integrated water heater

Volume l 2,640

Height m 2.1

Material Stainless steel

Insulation Rigid PU foam

Thickness of insulation mm 100

Heat loss kWh 576.6

Connection losses kWh 195.2

Loop

Solar loop

Fluid mixture Propylene mixture

Fluid concentration % 40

Fluid domains volume l 154.1

Pressure on top of the circuit bar 4

Solar thermal energy to the system [Qsol] kWh

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Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.

Heat generator energy to the system (solar thermal energy not included) [Qaux] kWh

Solar fraction: fraction of solar energy to system [SFn] %

Total fuel and/or electrical energy consumption of the system [Etot] kWh

Professional Report

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Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.

Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Solar thermal energy to the system [Qsol]

kWh 26000 1228 1540 2255 2473 2941 3038 3254 3115 2382 1731 1124 919

Heat generator energy to the system (solar thermal energy not included) [Qaux]

kWh 4321 617 478 152 73 110 431 291 310 172 268 604 814

Heat generator fuel and electrical energy consumption [Eaux]

kWh 5323 755 588 189 95 139 531 362 385 217 334 739 990

Solar fraction: fraction of solar energy to system [SFn]

% 85.7 66.6 76.3 93.7 97.1 96.4 87.6 91.8 90.9 93.3 86.6 65 53

Total fuel and/or electrical energy consumption of the system [Etot]

kWh 5346 756 589 192 98 141 533 364 387 218 336 740 991

Irradiation onto collector area [Esol]

kWh 69225 3190 4038 6215 7081 7843 7643 8391 8170 6671 4775 2882 2325

Electrical energy consumption of pumps [Epar]

kWh 23 1 2 2 2 2 2 2 2 2 2 1 1

Heat loss to indoor room (including heat generator losses) [Qint]

kWh 2181 195 166 130 131 151 226 212 211 167 167 200 226

Heat loss to surroundings (without collector losses) [Qext]

kWh 173 9 14 18 25 21 12 13 11 18 15 11 7

Total energy consumption [Quse]

kWh 28999 1769 1921 2289 2424 2913 3366 3389 3288 2377 1961 1649 1652

Professional Report

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Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.

Collector Collector fieldDaily maximum temperature [ °C]

Pool PoolTemperature [ °C] - Daily average

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Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.

Energy flow diagram