SOLARGE

WBG Nibelungen, Amalienstraße

Braunschweig, Germany

Multi-family house | 50 sqm installation

 

Data acquisition is still in process!

 


Project summary · Technical description · Financing · Development · Downloads

Project Summary

Description

In this particular case, the solar system is used for tap water and space heating. The system is an integrated solar-heating system, an industrially prefabricated construction unit with direct control for the complete heat production and distribution. The solar operating method is as follows: priority of solar and direct feeding-in to the consumption points, whereas storage is subordinate. An optimal heat management and controlling, as well as an online operating management is effected. Due to the cooling of the return flow, the efficiency of the solar system and the heat generation is increased. The hot tap water is generated via the hygienic direct flow, which leads to the prevention of legionella.

The object was awarded with the DGS certificate for large scale solar systems. There is a possibility to guarantee solar yields.




 


Building

Type of building

Multi-family house

Number of users / dwellings, floors

approx. 100 users
40 dwellings
4 floors

Year of construction

1952

Total effective area (heated)

1,943 m2

Hot tap water consumption (measured/estimated)

660 m3/a (measured)

Whole energy consumption for heating purpose after CSTS implementation

204,200 kWh/a


System engineering

Year of construction of CSTS

2003

Type of collectors

Flat plate collectors

Thermal power

32.5 kWtherm.

Aperture area of collectors*)

46.5 m2

Buffer storage

1.3 m3

Hot tap water storage

0.4 m3

Total capacity of boilers with energy source

160 kW, district heating

Type of hot tap water heating

Centralised

Type of heating system

Centralised


Costs

Total cost solar system

47,582 Euro

Cost of the CSTS / gross area of collectors

944 Euro/m2

Subsidies

0 %


Output

Output of solar heat**)

22,000 kWh/a

Reduction of final energy***)

37,000 kWh/a

CO2-emissions avoided

38 CO2/a

Solar performance guarantee

No

*) Aperture area = light transmitting area of the front glass
**) measured, between storage and piping to taps (solar system output)
***) related to the measured output mentioned before

 


 


Owner and operator

Nibelungen Wohnbau GmbH
Mr. Schlüter
Freyastr. 10
D-38106 Braunschweig
Phone: +49 (0)531 30003-338
Fax: +49 (0)531 30003-350
r.schlueter(at)nibelungen-
wohnbau.de

www.nibelungen-wohnbau.de

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Technical description

 


Description of the CSTS

Year of construction of CSTS

2003

Thermal power

32.5 kWtherm.

Gross area of collectors

50.4 m2

Aperture area of collectors

46.44 m2 

Type of collectors

Flat plate collectors

Type of assembly

Roof-integration

Orientation of collectors

South (0°)

Inclination angle to horizon

35 °

Freezing protection

Glycol

Overheating protection

Expansion vessel

Operation mode

Variable

Use of CSTS for

Hot tap water heating, space heating

Buffer storage

1.3 m3: 2 × 650 l
(Solvis stratified storage)

Hot tap water storage

0.4 m3: 2 × 200 l (standard storage system)

Control of backup-system / CSTS

Shared control: Standardised Solvis Zentro system, which completely controls the heating and the solar system. The integrated heating system also allows remote diagnostics.


Hot tap water system

Type of hot water heating

Centralised

Recirculation system

Yes

For decentralised systems:
The installation on the consumer site

./.

Size of storage for hot tap water

0.4 m3

Specification (if necessary)

./.


Space heating system

Type of heating system

Centralised

Number of boilers

1

Total capacity (power output) of boilers

160 kW

Capacity of each boiler (year of construction)

No. 1: 160 kW (n. a.)

Energy source

District heating

Type of boiler system

./.


Type of operation

Operator of the CSTS system

Self-operation

CSTS monitoring

Yes: output of solar heat, total water consumption, temperatures (solar, hot tap water, space heating, buffer and tap water storage, district heating)

Data accessible via internet

Yes

Scientific monitoring / follow up

Yes

Maintenance contract

Yes, once a year

Visualisation of the solar heat output

Yes: Monitoring via remote control of data of the heat meter of solar and district heating. Visualisation of the temperatures of the solar circuit, the heating circuit, the district heating, the buffer storage and the tap water storage. Visualisation of the status and the access to pumps and valves.
(operator, producer, inhouse technician)


Yield of CSTS plant

Output of solar heat

22,000 kWh/a

Origin of data

Measured

Measuring point

Between collector and storage

Reduction of final energy

37,000 kWh/a

Origin of data

Calculated

Solar performance guarantee

No


Heat consumption

Whole energy consumption for heating purposes after CSTS implementation

204,200 kWh/a

Origin of data

Measured

Energy used for

Hot tap water heating, space heating

Whole energy consumption for heating purposes before CSTS implementation

270,429

Total tap water consumption

not available

Hot tap water consumption

660 m3/a

Hot tap water temperature

50 °C

Cold water temperature

10 °C

 

 


Summary

 

The described object is an integrated solar-heating system with direct control for heat generation and distribution. High yields and small buffer storage volumes are possible, due to the principle "consumption over storage". This is also linked with the cooling of the return flow for the solar and the heat circuit. Hot tap water generation is carried out via a hygienic direct flow. Furthermore, there is an online operation management, a monitoring of the parameters, as well as remote control.

 

 


 


Planner, manufacturer and supplier

Solvis GmbH & Co. KG
Frank Schöler
Grotrian-Steinweg-Straße 12
38112 Braunschweig, Germany
Phone: +49 (0)531 28904-239
Fax: +49 (0)531 28904-149
f.schoeler(at)solvis-solar.de
www.solvis.de

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Financing and investment


 


Financing of the CSTS

Form of financing

Purchase

Distribution in percentage

0 %


Costs of solar materials

Total cost of solar system

47.582 Euro

Detailed costs for

Collectors

12.600 Euro

Elevation / mounting structure

1.672 Euro

Storage / heat exchanger

5.080 Euro

Backup heater

16.730 Euro

Control

11.500 Euro

Installation

included

Planning / Engineering

included

Others

included


Operation costs of heating system

Power cost for pumping

116 Euro/a

Maintenance cost

264 Euro/a

Monitoring cost

183 Euro/a

Other operation cost

./. Euro/a

Total operation cost

564 Euro/a

Or:
Increase of the operation cost after CSTS implementation

64 Euro/a

 


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Development & experiences

 

 


Experiences management

Experienced problems or failures?

Yes: overheating, pump failures, problems with control, faulty adjusting motors

Found solutions to these problems or failures?

Yes: exchange of components


Financial effects / project performance

Project economically efficient?

not available

Fiscal or other financial effects?

No

Effects on rental fees?

No


Experiences technical staff

Experienced problems or failures?

Yes

Found solutions to these problems or failures?

Yes

 


Top of page Project summary · Technical description · Financing · Development · Downloads

Downloads

SOLARGE_goodpractice_de_amalienstrasse.pdf

this datasheet in printable PDF-format

0.9 M

amalie_scheme.pdf

the hydraulic scheme

558 K