SOLARGE

ASL Chivasso

Torino, Italy

Hospital | 68 sqm installation

 


Project summary · Technical description · Financing · Development · Downloads

Project Summary

Description

In Chivasso (TO), a solar combisystem plant was installed on the roof of a public hospital. The 60 m2 flat plate collectors cover over 15 % of the whole energy demand of the building, which houses also a nurse school.
The collector field is made of large scale modules, which are fixed on top of the flat roof with balance weights, avoiding the risk of damaging the water tightness of the building.
The heating network is based on fan coils, which are also responsible for cooling: in the summer the solar plant provides heat to the air treatment unit.
The plant has been accurately monitored in the framework of the Altener project "Solar Combisystems".




 


Building

Type of building

Hospital

Number of users / dwellings, floors

30 users
1 floor

Year of construction

2002

Total effective area (heated)

2,800 m2

Hot tap water consumption (measured/estimated)

730 m3/a

Whole energy consumption for heating purpose after CSTS implementation

180,000 kWh/a


System engineering

Year of construction of CSTS

2003

Type of collectors

Flat plate collectors

Thermal power

42.6 kWtherm.

Aperture area of collectors*)

60.8 m2

Buffer storage

3 m3

Hot tap water storage

1.5 m3

Total capacity of boilers with energy source

348 kW, natural gas

Type of hot tap water heating

Centralised

Type of heating system

Centralised


Costs

Total cost solar system

32,000 Euro

Cost of the CSTS / gross area of collectors

471 Euro/m2

Subsidies

22 %


Output

Output of solar heat**)

22,000 kWh/a

Reduction of final energy***)

33,000 kWh/a

CO2-emissions avoided

7.6 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

 

 


Andrea Mingione, technical responsible of ASL:

"Local authorities play a fundamental role in the promotion of environmental friendly energy technologies. ASL 7, Chivasso, shows to the citizens every day that solar thermal plants have reached maturity. Indeed, our system has reached good performances within the first three years and did not cause high maintenance efforts. Defects have been solved quickly and easily."

 

 


Owner

ASL 7
Ing. Mingione
via Po, 11
Chivasso (TO), Italy
Phone: +39 11 9176-354
Fax: +39 11 9176-500
tecnico(at)asl7.to.it

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Technical description

 


Description of the CSTS

Year of construction of CSTS

2003

Thermal power

42.6 kWtherm.

Gross area of collectors

68.0 m2

Aperture area of collectors

60.8 m2 

Type of collectors

Flat plate collectors

Type of assembly

On flat roof

Orientation of collectors

South-East (n. a. °)

Inclination angle to horizon

45°

Freezing protection

Glycol

Overheating protection

Expansion vessel

Operation mode

Low flow

Use of CSTS for

Hot tap water heating, space heating

Buffer storage

3.0 m3 (1 × 3.0 m3 )

Hot tap water storage

1.5 m3 (1 × 1.5 m3)

Control of backup-system / CSTS


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

1.5 m3

Specification (if necessary)

./.


Space heating system

Type of heating system

Centralised

Number of boilers

3

Total capacity (power output) of boilers

348 kW

Capacity of each boiler (year of construction)

all: 116 kW (2002)

Energy source

Natural gas

Type of boiler system

Condensing


Type of operation

Operator of the CSTS system

Self-operation

CSTS monitoring

Yes: output of solar heat, total water consumption

Data accessible via internet

not available

Scientific monitoring / follow up

No

Maintenance contract

Yes: every 6 months and whenever necessary

Visualisation of the solar heat output

not available


Yield of CSTS plant

Output of solar heat

22,000 kWh/a

Origin of data

Design (calculated)

Measuring point

Between storage and piping to taps

Reduction of final energy

33,000 kWh/a

Origin of data

Calculated

Solar performance guarantee

No


Heat consumption

Whole energy consumption for heating purposes after CSTS implementation

180,000 kWh/a

Origin of data

Estimated from bills

Energy used for

Hot tap water heating, space heating

Whole energy consumption for heating purposes before CSTS implementation

180,000 kWh/a

Total tap water consumption

not available

Hot tap water consumption

730 m3/a

Hot tap water temperature

45 °C

Cold water temperature

10 °C

 

 


Summary

 

The solar plant provides heat for the tap water heating and for the space heating of the building. During the summer solar heat is used also for the air treating unit of the cooling system. Solar heat is stored in a 3 m3 buffer storage, while the capacity of the hot tap water storage is 1.5 m3.

The plant cost amount to about 470 €/m2 and the solar fraction is 16 %.



 


Producer

Wagner & Co Solartechnik
Zimmermannstraße 12
35091 Cölbe, Germany
Phone: +49 (0)6421 8007-0
Fax: +49 (0)6421 8007-22
info(at)wagner-solar.com
www.wagner-solar.com

 

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Financing and investment

Introduction

The Italian Ministry of Environment implemented a subsidy program for solar thermal installations on public buildings. The program financed up to 30 % of the total investment cost. Since ASL is a public entity, the plant was subsidised (with 7,000 €).


 


Financing of the CSTS

Form of financing

Purchase

Distribution in percentage

22 %


Costs of solar materials

Total cost of solar system

32,000 Euro

Detailed costs for

Collectors

15,120 Euro

Elevation / mounting structure

4,080 Euro

Storage / heat exchanger

4,809 Euro

Backup heater

./. Euro

Control

572 Euro

Installation

2,330 Euro

Planning / Engineering

./. Euro

Others: piping

2,214 Euro


Operation costs of heating system

Increase of the operation cost after CSTS implementation

not available

 

 


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Development & experiences

 


Experiences management

Experienced problems or failures?

Yes: broken pump, low pressure in the solar circuit

Found solutions to these problems or failures?

Yes: low pressure was caused by leakage in the circuit


Financial effects / project performance

Project economically efficient?

Yes

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?

not available

 

 

 


Plumbing company

Schinetti s. r. l.
via Regaldi 14/B
Torino, Italy
Phone: +39 11 856481
Fax: +39 11 858076

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Downloads

SOLARGE_goodpractice_it_chivasso.pdf

this datasheet in printable PDF-format

0.9 M

chivasso_scheme.pdf

the hydraulic scheme

428 K