SOLARGE

Athena

Calimera (LE), Italy

Elderly house | 52 sqm installation

 

 


Project summary · Technical description · Financing · Development · Downloads

Project Summary

Description
The existing system was already preset for solar thermal integration. Besides, the constant thermal load of elderly houses fits very well to this technology. Finally, high subsidies by the Region of Puglia were available. The boundary conditions were obviously very suitable for the installation of a solar thermal plant: the system provides heat for domestic hot water preparation and has been realised with heat pipe vacuum tube collectors.

 


Building

Type of building

Elderly house

Number of users / dwellings, floors

53 + 25 users
28 rooms
3 floors

Year of construction

2006

Total effective area (heated)

700 m2

Hot tap water consumption (measured/estimated)

not available

Whole energy consumption for heating purpose after CSTS implementation

42,190 kWh/a


System engineering

Year of construction of CSTS

2007

Type of collectors

Vacuum tube collectors

Thermal power

24 kWtherm.

Aperture area of collectors*)

34 m2

Buffer storage

./. 

Hot tap water storage

2 m3

Total capacity of boilers with energy source

(25 + x) kW, natural gas + electricity (heat pump)

Type of hot tap water heating

Centralised

Type of heating system

Centralised


Costs

Total cost solar system

38,000 Euro

Cost of the CSTS / gross area of collectors

732 Euro/m2

Subsidies

40 %


Output

Output of solar heat**)

31,970 kWh/a

Reduction of final energy***)

31,970 kWh/a

CO2-emissions avoided

7.3 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

 

 


Geom. Francesco Corlianò, Amm. ATHENA s.r.l.:

"It is strongly necessary to implement projects for promoting solar thermal technology, which has enormous benefits.
Hopefully, incentive mechanisms will be simplified and accelerated.
It is crucial to train technicians, since a good plant design is the basis for energy and economic savings."

 

 


Owner

ATHENA s.r.l.
geom. Francesco Corlianò
Via Salvo d’Acquisto, 25
73021 Calimera (LE), Italy
Phone: +39 832 873505
Fax: +39 832 873505
f.corliano(at)athenaservizi.it
www.athenaservizi.it


Operator

See owner

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

Technical description

 


Description of the CSTS

Year of construction of CSTS

2007

Thermal power

24 kWtherm.

Gross area of collectors

52 m2

Aperture area of collectors

33.8 m2 

Type of collectors

Vacuum tube collectors

Type of assembly

On flat roof

Orientation of collectors

South (0°)

Inclination angle to horizon

45°

Freezing protection

Glycol

Overheating protection

Expansion vessel

Operation mode

High-flow

Use of CSTS for

Hot tap water heating

Buffer storage

./.

Hot tap water storage

2 m3 (2 × 1 m3)

Control of backup-system / CSTS

Shared control


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

not available

Total capacity (power output) of boilers

not available

Capacity of each boiler (year of construction)

not available

Energy source

Electricity (heat pump)

Type of boiler system

./.


Type of operation

Operator of the CSTS system

Self-operation

CSTS monitoring

No

Data accessible via internet

./.

Scientific monitoring / follow up

not available

Maintenance contract

No

Visualisation of the solar heat output

No


Yield of CSTS plant

Output of solar heat

31,970 kWh/a

Origin of data

Design (calculated)

Measuring point

Between storage and piping to taps

Reduction of final energy

31,970 kWh/a

Origin of data

Software simulation

Solar performance guarantee

No


Heat consumption

Whole energy consumption for heating purposes after CSTS implementation

42,190 kWh/a
(for DHW)

Origin of data

Design (calculated)

Energy used for

Hot tap water heating

Whole energy consumption for heating purposes before CSTS implementation

42,190 kWh/a

Total tap water consumption

not available

Hot tap water consumption

912 m3/a

Hot tap water temperature

50 °C

Cold water temperature

8–12 °C

 

 


Summary

The collector field of this pump driven system for DHW preparation is divided into two sub-fields, which are connected in series.
The control system operates both, the solar and the conventional plant.



Click image for larger view!

 


Planning/Engineering

Studio Tecnico PROGRES
Ing. Antonio De Giorgi
via Savoia, 23
Galatone (Le), Italy
Phone: +39 333 4430162
Fax: +39 833 865927
a_degiorgi(at)libero.it
www.studioprogres.it



Installer 

Ditta Giorgio Impianti
Giorgio Pispico
via Enrico Toti, 21
Matino (Le), Italy
Phone: +39 333 9464255
Fax: +39 833 503539
info(at)giorgioimpianti.it
www.giorgioimpianti.it



Producer of the CSTS

CMG Solari di Giannelli Mario
Giorgio Pispico
via Monte Rosa, 14
Melissano (Le), Italy
Phone: +39 833 581428
Fax: +39 833 581428
info(at)cmgsolari.it
www.cmgsolari.it

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

Financing and investment

Introduction
Despite low gas prices, yearly savings of about 2,000 Euro are expected. The simple pay back time is estimated to be about eleven years, but does not include increase of energy costs and the benefits concerning amortisation. The investor decided to purchase evacuated tube collectors, although this technology was not strictly necessary for this kind of application.

 


Financing of the CSTS

Form of financing

Purchase

Distribution in percentage

40 %


Costs of solar materials

Total cost of solar system

38,000 Euro

Detailed costs for

Collectors (incl. mounting structure)

20,000 Euro

Elevation / mounting structure

not available

Storage / heat exchanger

not available

Backup heater

not available

Control

not available

Installation

not available

Planning / Engineering

not available

Others

not available


Operation costs of heating system

Increase of the operation cost after CSTS implementation

not available

 




 


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

Development & experiences

Qualitative aspects of the CSTS

  •  The decision was based on the will to install modern plants. This was made easier by the availability of regional subsidies.

  • The management of the elderly house is satisfied with the solar system's performance.

  • It is recommendable to carefully evaluate the choice between flat plate and vacuum tube collectors, especially according to the local climate and the kind of energy load.


 


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


Experiences technical staff

Experienced problems or failures?

No

Found solutions to these problems or failures?

./.

 

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

Downloads

SOLARGE_goodpractice_it_athena.pdf

this datasheet in printable PDF-format

1.0 M

athena_scheme.pdf

the hydraulic scheme

487 K