SOLARGE

Collegio Universitario "Renato Einaudi"

Torino (TO), Italy

University college | 110 sqm installation

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Project Summary

Description
This project is a follow up of ing. Serraino's diploma thesis, which was carried out under the supervision of ing. Degiorgis. 40 % of the investment costs were financed by the Region of Piemonte in the framework of a call for demo plants. Following factors lead to the final decision:

  • high thermal energy demand (185 students living in the college)

  • regional subsidies

  • technical university located very closed to the college

  • interest from both, the college management and the university

  • availability of feasibility studies, carried out in a diploma thesis

Guided tours to the plant will be organised for the college students.

 


Building

Type of building

University college

Number of users / dwellings, floors

185 users
180 rooms
7 floors

Year of construction

1961

Total effective area (heated)

5,858 m2

Hot tap water consumption (measured)

2,150 m3/a

Whole energy consumption for heating purpose after CSTS implementation

92,500 kWh/a


System engineering

Year of construction of CSTS

2007

Type of collectors

Flat plate collectors

Thermal power

71 kWtherm.

Aperture area of collectors*)

101 m2

Buffer storage

4 m3

Hot tap water storage

2 m3

Total capacity of boilers with energy source

1,096 kW
natural gas

Type of hot tap water heating

Centralised

Type of heating system

Centralised


Costs

Total cost solar system

89,793 Euro

Cost of the CSTS / gross area of collectors

818 Euro/m2

Subsidies

40 %


Output

Output of solar heat**)

50,000 kWh/a

Reduction of final energy***)

60,000 kWh/a

CO2-emissions avoided

13.8 CO2/a

Solar performance guarantee

Yes

*) 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

 

 


Donato Firrao, Collegio Einaudi President:

"We decided to buy this plant for economic as well as for didactic scopes. Based on the solar thermal plant, awareness raising towards environmental and sustainability topics among the college guests will be possible.Besides, a co-operation with the technical university will enable plant monitoring. We have also foreseen money to subsidy diploma thesis works focussed on the plant monitoring. This plant will therefore produce both, hot water and culture, which should definitely be the role of a college."

 

 


Owner

Collegio universitario di Torino "R. Einaudi"
Lino Vella
via Maria Vittoria 39
Torino (TO), Italy
Phone: +39 011 8126853
Fax: +39 011 8171008
vella(at)collegioeinaudi.it
www.collegioeinaudi.it


Operator

See owner

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Technical description

 


Description of the CSTS

Year of construction of CSTS

2007

Thermal power

71 kWtherm.

Gross area of collectors

109.8 m2

Aperture area of collectors

101.4 m2 

Type of collectors

Flat plate collectors

Type of assembly

Roof integration

Orientation of collectors

South-West (+34)

Inclination angle to horizon

27

Freezing protection

Glycol

Overheating protection

Expansion vessel

Operation mode

Low-flow / variable

Use of CSTS for

Hot tap water heating

Buffer storage

4 m3 (2 2,000 l)

Hot tap water storage

2 m3 (1 2,000 l)

Control of backup-system / CSTS

Separated control: the pump is activated by the control system, but a photovoltaik system provides part of the necessery energy.


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

2 m3

Specification (if necessary)

./.


Space heating system

Type of heating system

Centralised

Number of boilers

4

Total capacity (power output) of boilers

1,096 kW

Capacity of each boiler (year of construction)

all: 274 kW (2004)

Energy source

Natural gas

Type of boiler system

Condensing


Type of operation

Operator of the CSTS system

Self-operation

CSTS monitoring

Yes (solar radiation, output of solar heat, total water consumption, energy consumption for circulation system, storage temperatures, energy consumption for DHW). For each circuit (solar, boiler, cold water) temperatures and low rate are being monitored, in order to measure the instantaneous and yearly loads. Monitoring is possible thanks to co-operation between the investor, the plant maintenance and the technical university.

Data accessible via internet

Yes

Scientific monitoring / follow up

Yes

Maintenance contract

Yes: six times a year

Visualisation of the solar heat output

Yes: The display is installed in the building hall and shows a simplified plant scheme and the main operation data (solar radiation, collector power output, collector and storage temperature).


Yield of CSTS plant

Output of solar heat

50,000 kWh/a

Origin of data

Design (calculated)

Measuring point

Between collector and storage tanks

Reduction of final energy

60,000 kWh/a

Origin of data

./.

Solar performance guarantee

Yes


Heat consumption

Whole energy consumption for heating purposes after CSTS implementation

92,500 kWh/a

Origin of data

Calculated

Energy used for

Hot tap water heating

Whole energy consumption for heating purposes before CSTS implementation

92,500 kWh/a

Total tap water consumption

10,920 m3/a

Hot tap water consumption

2,150 m3/a

Hot tap water temperature

48 C

Cold water temperature

13 C

 

 


Summary

The solar thermal plant is responsible for pre-heating domestic hot water.

Large-scale modules (10 up to 14 m2 each) have been chosen for the collector field. The pump is run by PV modules. Two storage tanks (2,000 l each) stock the solar heat. Domestic hot water is prepared through heat exchangers directly immersed in the storages.


 


Planner

Degiorgis-Serraino
Luca Degiorgis, Matteo Serraino
via F. di Cambiano 18 bis
Moncalieri (TO), Italy
Phone: +39 3493566826
luca.degiorgis(at)gmail.com

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Financing and investment

Introduction
The specific cost per sqare metre of this plant is about 800 Euro, which means 500 Euro considering also the regional subsidies.
In order to obtain these subsidies, plants were expected to introduce technological innovation.


 


Financing of the CSTS

Form of financing

Purchase

Distribution in percentage

40 %
Subsidies from Region Piemonte call 2005 for demo plants


Costs of solar materials

Total cost of solar system

89,793 Euro

Detailed costs for

Collectors

21,220 Euro

Elevation / mounting structure

6,327 Euro

Storage / heat exchanger

4,813 Euro

Backup heater

./.

Control

7,745 Euro

Installation

37,279 Euro

Planning / Engineering

./.

Others

12,409 Euro


Operation costs of heating system

Increase of the operation cost after CSTS implementation

not available

 

 


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Development & experiences

Qualitative aspects of the CSTS
Engineering students living in the college may develop diploma thesis focussed on this plant, eventually benefiting of 1,500 Euro subsidies.
This plant represents a test plant to demonstrate the solar thermal technology and later extend this good practice to other similar buildings.


 


Experiences management

Experienced problems or failures?

not available

Found solutions to these problems or failures?

./.


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?

not available

Found solutions to these problems or failures?

./.

 

 


Summary of experiences / Notices to the project performance
This project is a follow up of ing. Serraino's diploma thesis, which was carried out under the supervision of ing. Degiorgis'. Technical and economic analysis had been implemented.
Once the diploma thesis has been finished, the design job was assigned to ing. Degiorgis and ing. Serraino. High importance was put on innovative and non conventional aspects (e. g. PV plant for pump operation). Based on the design figures, a call for the realisation of the system has been published.
The plant was installed recently and no operation data are available so far.
It is recommendable to choose, if possible, conventional and well experienced technological solutions.
The planners will be deeply involved in the monitoring of the system. Thanks to this positive experience they are planning other large scale solar thermal plants.

 


Planner

Degiorgis-Serraino
Luca Degiorgis, Matteo Serraino
via F. di Cambiano 18 bis
Moncalieri (TO), Italy
Phone: +39 3493566826
luca.degiorgis(at)gmail.com

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Downloads

SOLARGE_goodpractice_it_collegioeinaudi.pdf

this datasheet in printable PDF-format

0.9 M

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