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San Germano Chisone (TO), Italy
House for elderly | 70 sqm installation
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Description The plant of San Germano was installed on the roof of an elderly house hosting about 100 people. The collector area is 70 sqm of CPC collectors, providing hot tap water. Together with the solar plant, a new condensing boiler was installed.
The management of the building started the project due to an accompaignment program by the Province of Turin, which provided technical assistance by experts and economical subsidies.
Detailed information on the solar gain of the system is basically available on the internet, but so far a modem is required. The monthly solar gain is published on the web page of the Province. It is also possible to observe the solar performance on a monitor in the entrance of the building. |
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Building
| Type of building | House of elderly
| Number of users/floors | 98 users, 3 floors
| Year of construction | 1893
| Total effective area (heated) | 4,400 m2 | Hot tap water consumption (measured/estimated) | 4,500 m3/a (calculated) | Whole energy consumption for heating purpose after CSTS implementation | 870,000 kWh/a |
System engineering
| Year of construction of CSTS | 2004
| Type of collectors | Vacuum tube collectors
| Thermal power | 49 kWtherm. | Aperture area of collectors*) | 70 m2 | Buffer storage | 3 m3 | Hot tap water storage | 3 m3 | Total capacity of boilers with energy source | 545 kW, natural gas
| Type of hot tap water heating | Centralised
| Type of heating system | Centralised
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Costs
| Total cost solar system | 72,850 Euro | Cost of the CSTS/gross area of collectors | 934 Euro/m2 | Subsidies | 40 % |
Output
| Output of solar heat**) | 54,000 kWh/a | Reduction of final energy***) | 94,290 kWh/a | CO2-emissions avoided | 19.5 t CO2/a | Solar performance guarantee | No
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*) 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
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Dorino Piras, Councillor responsible for environment – Province of Turin
|  "Our local promotion programs for renewable energies base on a complete support to the investors. It is essential to create subsidy schemes and inform the involved actors about their existence. Furthermore, technicians must be trained and supported, especially during the design and the installation of plants. Finally, an adequate monitoring plan should check the operation of each system."
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Owner
| Asilo del Vecchi
Giorgio Baret
via Carlo Alberto Tron, 27
San Germano Chisone, Italy
Phone: +39 0121 58855
asilo.sangermano(at)tpellice.it
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Operator
| see Owner | |
Description of the CSTS
| Year of construction of CSTS | 2004
| Thermal power | 49 kWtherm. | Gross area of collectors | 78 m2 | Aperture area of collectors | 70 m2 | Type of collectors | Vacuum tube collectors
| Type of assembly | Roof top
| Orientation of collectors | South (0°) | Inclination angle to horizon | 45°
| Freezing protection | Control system (Sistema aqua)
| Overheating protection | Expansion vessel
| Operation mode | Low flow
| Use of CSTS for | Hot tap water heating, Space heating
| Buffer storage | 3 m3 | Hot tap water storage | 3 m3 | Control of backup-system/CSTS | Separated control
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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 | 3 m3 | Specification (if necessary) | Central
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Space heating system
| Type of heating system | Centralised
| Number of boilers | 3
| Total capacity (power output) of boilers | 545 kW | Capacity of each boiler (year of construction) | No.1: 220 kW (2000)
No.2: 200 kW (2004)
No.3: 125 kW (2000)
| Energy source | Natural gas | Type of boiler system | Standard, Condensing |
Type of operation
| Operator of the CSTS system | Self-operation
| CSTS monitoring | Yes
(Solar gain of the system & monitoring of the monthly collector circuit output)
| Data accessible via internet | Yes
| Scientific monitoring & follow up | No
| Maintenance contract | Yes
| Visualisation of the solar heat output | Yes
(PC-monitor showing the system performance installed in the entrance-hall)
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Yield of CSTS plant
| Output of solar heat | 54,000 kWh/a | Origin of data | Design (Calculated)
| Measuring point | Between collector and storage
(collector output)
| Reduction of final energy | 94,290 kWh/a | Origin of data | Design
| Solar performance guarantee | No |
Heat consumption
| Whole energy consumption for heating purposes after CSTS implementation | 870,000 kWh/a | Origin of data | Estimated (from standards)
| Energy used for | Hot tap water heating
| Whole energy consumption for heating purposes before CSTS implementation | 870,000 kWh/a | Total tap water consumption | 9,300 m3/a | Hot tap water consumption | 4,500 m3/a | Hot tap water temperature | 60 °C | Cold water temperature | 10/15 °C | |
Summary
| The centralised heating system provides heat for hot tap water and space heating.
Together with the solar plant, a new gas condensing boiler was installed. The existing boiler is used to cover the peak loads. |
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Planner
| Tecnoalpi 2000 di Giorgio Rostan
Giorgio Rostan
Borgata Marchisa, 8
San Germano Chisone, Italy
Phone: +39 0121 582053
Fax: +39 0121 581900
tecnoalpi(at)ecosistec.it
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Installer
| Technical Impianti
Geom. Alberto Calandretti
Castel del Bosco
10060 Roure (TO), Italy
Phone: +39 0121 842010
Fax: +39 0121 842003
tecnoalpi(at)ecosistec.it |
Producer
| Paradigma s.r.l.
Jürgen Korff
?, Italy
Phone: +39 0465 648701
info(at)paradigmaitalia.it
www.paradigmaitalia.it | |
Introduction The plant in San Germano is one of three plants financed by the Province of Turin in a demonstration program. The Province of Turin subsidised the plant by 40 %
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Financing of the CSTS
| Form of financing | Purchase, 60 % self financing
| Distribution in percentage | 40 % |
Costs of solar materials
| Total cost of solar system | 72,850 Euro |
Detailed costs for
| Collectors | 43,000 Euro | Elevation/mounting structure | 3,300 Euro | Storage, heat exchanger | 3,150 Euro | Back-up heater | ./. | Control | 2,900 Euro | Installation | 13,500 Euro | Planning/Engineering | 2,000 Euro | Others:
Expansion vessel and Piping insulation
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5,000 Euro
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Operation costs of heating system
| Power cost for pumping | not available
| Maintenance cost | not available | Monitoring cost | not available | Other operation cost | not available | Total operation cost | not available | or: Increase of the operation cost after CSTS implementation | not available | | Special note for subsidy systems in the partner country | The Province of Turin subsidised part of the total investment costs in a demonstration programme.
Publications on the Province’s web site and presentations on various newspapers, newsletters and exhibitions | |
Addresses
| Provincia di Torino
Silvio de Nigris
via Valleggio, 5
Torino, Italy
Phone: +39 011 8613883
Fax: +39 011 8613978
denigris(at)provincia.torino.it
www.provincia.torino.it/
ambiente/energia/ | |
Quantitative aspects of the CSTS
The CSTS in San Germano was installed on an elderly house and subsidised by the Province of Turin. The collector field is designed for hot water preparation but serves also the heating system because of the existing hydraulic scheme. The plant (70 sqm of evacuated tubes) is running properly and being monitored monthly.
The performance of the system is available on the internet, on the province’s web-site:
http://www.provincia.torino.it/ambiente/energia/progetti/san_germano | 
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Experiences management
| Experienced problems or failures? | No
| Found solutions to these problems or failures? | ./. |
Financial effects / project performance
| Project economically efficient? | Yes
| Fiscal or other financial effects? | No
| Effects on rental fees? | No
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Experiences technical staff
| Experienced problems or failures? | Yes
| Found solutions to these problems or failures? | Yes
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Scientific monitoring of the CSTS
| Ambiente Italia
Marco Calderoni
via Carlo Poerio, 39
Milano, Italy
Phone: +39 02 27744230
Fax: +39 02 27744222
marco.calderoni(at)ambienteitalia.it
www.ambienteitalia.it/solare.htm | |
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