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					Professional Report

"Project name"                                                                 9c: Space heating (solar thermal, fresh-water station)




Location of the system                                                              Map section


San Francisco
Longitude: -122.414°
Latitude: 37.794°
Elevation: 60 m


 This report has been created by:
 Vela Solaris AG
 Corina Kälin
 Stadthausstrasse 125
 8400 Winterthur
 info@velasolaris.com




Comments on the project
"Project information"




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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.
Professional Report


System overview (annual values)

Total fuel and/or electrical energy consumption of
                                                                                    137.5 kWh
the system [Etot]
Total energy consumption [Quse]                                                     4,717.1 kWh
System performance (Quse / Etot)                                                    34.3
Comfort demand                                                                      Energy demand covered

Overview solar thermal energy (annual values)

Collector area                                                                      20 m²
Solar fraction total                                                                99.1%
Solar fraction hot water [SFnHw]                                                    98.9 %
Solar fraction building [SFnBd]                                                     98.9 %
Total annual field yield                                                            7,678.9 kWh
Collector field yield relating to gross area                                        383.9 kWh/m²/Year
Collector field yield relating to aperture area                                     426.6 kWh/m²/Year
Max. fuel savings                                                                   903.5 l: [Heating oil]
Max. energy savings                                                                 9,034 kWh
Max. reduction in CO2 emissions                                                     2,716.3 kg



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




Meteorological data-Overview

Average outdoor temperature                                               14.6 °C
Global irradiation, annual sum                                            1,721.8 kWh/m²
Diffuse irradiation, annual sum                                           637.2 kWh/m²




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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.
Professional Report


Component overview (annual values)

Boiler                                                                     Oil 12.5kW
Power                                                                      kW                           12.5
Total efficiency                                                           %                            61.7
Energy from/to the system [Qaux]                                           kWh                          70.3
Fuel and electrical energy consumption [Eaux]                              kWh                          114
Energy savings solar thermal                                               kWh                          9,034
CO2 savings solar thermal                                                  kg                           2,716.3
Fuel savings solar thermal                                                 l                            903.5
Collector                                                                  Flat-plate, good quality
Data Source                                                                                             SPF
Number of collectors                                                                                    10
Number of arrays                                                                                        2
Total gross area                                                           m²                           20
Total aperture area                                                        m²                           18
Total absorber area                                                        m²                           18
Tilt angle (hor.=0°, vert.=90°)                                            °                            60
Orientation (E=+90°, S=0°, W=-90°)                                         °                            0
Collector field yield [Qsol]                                               kWh                          7,678.9
Irradiation onto collector area [Esol]                                     kWh                          31,517.1
Collector efficiency [Qsol / Esol]                                         %                            24.4
Direct irradiation after IAM                                               kWh                          18,947.2
Diffuse irradiation after IAM                                              kWh                          10,587
Building                                                                   Single family house, low-energy building
Heated/air-conditioned living area                                         m²                           74
Heating setpoint temperature                                               °C                           19
Heating energy demand excluding DHW [Qdem] kWh                                                          9
Specific heating energy demand excluding
                                                                           kWh/m²                       0.1
DHW [Qdem]
Solar gain through windows                                                 kWh                          9,956.3
Total energy losses                                                        kWh                          13,286

Heating element                                                            Floor heating
Number of heating/cooling modules                                          -                            3
Power per heating element under standard
                                                                           W                            1,000
conditions
Nominal inlet temperature                                                  °C                           40
Nominal return temperature                                                 °C                           35
Net energy from/to heating/cooling modules                                 kWh                          -0.1




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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.
Professional Report


Hot water demand                                                           Constant
Volume withdrawal/daily consumption                                        l/d                          301.3
Temperature setting                                                        °C                           50
Energy demand [Qdem]                                                       kWh                          4,524.8

External heat exchanger Potable water                                      medium
Transfer capacity                                                          W/K                          10,000

External heat exchanger Solar loop                                         small
Transfer capacity                                                          W/K                          5,000

Pump Potable water                                                         Eco, small
Circuit pressure drop                                                      bar                          0.002
Flow rate                                                                  l/h                          384.6
Fuel and electrical energy consumption [Epar]                              kWh                          1.5

Pump Transfer circuit                                                      Eco, small
Circuit pressure drop                                                      bar                          0.004
Flow rate                                                                  l/h                          270
Fuel and electrical energy consumption [Epar]                              kWh                          11

Pump Solar loop                                                            Eco, small
Circuit pressure drop                                                      bar                          0.187
Flow rate                                                                  l/h                          270
Fuel and electrical energy consumption [Epar]                              kWh                          11

Storage tank Buffer tank                                                   1000l buffer
Volume                                                                     l                            1,000
Height                                                                     m                            2
Material                                                                                                Steel
Insulation                                                                                              Rigid PU foam
Thickness of insulation                                                    mm                           80
Heat loss                                                                  kWh                          1,173.2
Connection losses                                                          kWh                          837.8



 Loop

Solar loop
Fluid mixture                                                                                           Propylene mixture
Fluid concentration                                                        %                            33.3
Fluid domains volume                                                       l                            33.1
Pressure on top of the circuit                                             bar                          4




4   /   7                                         V6.1.6.18113 / 16.07.2013 / 17:08:40
Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.
Professional Report


 Solar thermal energy to the system [Qsol]                                                                                                   kWh




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




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




5   /   7                                         V6.1.6.18113 / 16.07.2013 / 17:08:40
Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.
Professional Report


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




            Year        Jan         Feb         Mar         Apr         May         Jun         Jul        Aug         Sep          Oct      Nov    Dec
Solar thermal energy to the system [Qsol]
 kWh        7679        605         595         676         674         653         622         639         666         637         661      599    652
Heat generator energy to the system (solar thermal energy not included) [Qaux]
 kWh         70          36          20           9           0           0           0           0           0           0           0       0      5
Heat generator fuel and electrical energy consumption [Eaux]
 kWh        114          59          33          14           0           0           0           0           0           0           0       0      8
Solar fraction: fraction of solar energy to system [SFn]
    %       99.1        94.3        96.7        98.8        100         100         100         100         100         100         100      100    99.2
Total fuel and/or electrical energy consumption of the system [Etot]
 kWh        138          61          34          16           2           2           2           2           2           2           2       2      10
Irradiation onto collector area [Esol]
 kWh 31517             2115        2192        2723        2745        2744        2548        2823        3056        3188        3073      2268   2044
Electrical energy consumption of pumps [Epar]
 kWh         24           2           2           2           2           2           2           2           2           2           2       2      2
Total energy consumption [Quse]
 kWh        4717        427         392         434         410         408         378         376         367         356         377      380    412
Heat loss to indoor room (including heat generator losses) [Qint]
 kWh        2864        233         213         245         227         238         216         252         266         262         267      232    213
Heat loss to surroundings (without collector losses) [Qext]
 kWh        244          17          17          22          22          22          20          22          23          22          23       18     17




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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.
Professional Report




Collector
Daily maximum temperature [ °C]




7   /   7                                         V6.1.6.18113 / 16.07.2013 / 17:08:40
Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.

				
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posted:9/12/2013
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