SOLARGE

Dom Tisje

Šmartno pri Litiji, Slovenia

Pension house | 175 + 43 sqm installation

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Data acquisition is still in process!

 


Project summary · Technical description · Financing · Development · Downloads

Project Summary

Description

Two systems operate in Elderly home Tisje. The larger one with solar collector aperture area 160 m2 is used for preheating of tap water, the smaller one with solar collector aperture area 40 m2 for heating of water for washing and drying of linen. In both systems oil boilers are used for backup heating.
Thermal insulation of building varies regards to year of construction of the buildings. In the year 2005 they started with energy reconstruction. So far the oil boilers (2005, 500 kW and 300 kW) and tap water backup heating heat storages (2006) were replaced. In the following years the solar system will be renewed.




 


Building

Type of building

Pension house

Number of users / dwellings, floors

200 (+80) users
3 floors

Year of construction

1578, 1976, 1982

Total effective area (heated)

3,213 m2

Hot tap water consumption (measured/estimated)

5,400 m3/a

Whole energy consumption for heating purpose after CSTS implementation

not available


System engineering

Year of construction of CSTS

1992–94

Type of collectors

Flat plate collectors

Thermal power

140 kWtherm.

Aperture area of collectors*)

200 m2

Buffer storage

17 m3

Hot tap water storage

5 m3

Total capacity of boilers with energy source

800 kW, heating oil

Type of hot tap water heating

Centralised

Type of heating system

Centralised


Costs

Total cost solar system

not available

Cost of the CSTS / gross area of collectors

not available

Subsidies

0 %


Output

Output of solar heat**)

not available

Reduction of final energy***)

not available

CO2-emissions avoided

not available

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

 

 


Mrs. Vida Lukac, general manager of Elderly home Tisje:

"Since the last two years the price of heating oil has risen a lot. Therefore we decided to make a complete energy improvement of buildings and heating systems. This will include changing of old oil boilers, thermal insulation of buildings (the older one) and reconstruction of the solar systems."

 

 


Owner and operator

Eldery home Tisja
Mrs. Vida Lukac, general manager
Mr. Ciril Vozelj, energy manager
Crni potok 13
Šmartno pri Litiji, Slovenia
Phone: +386 1 890 01 00
Fax: +386 1 890 01 10
tisje(at)ssz-slo.si
www.dom-tisje.com

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

Technical description

 


Description of the CSTS

Year of construction of CSTS

1992–1994

Thermal power

112 + 28 = 140 kWtherm.

Gross area of collectors

175 + 43 = 218 m2

Aperture area of collectors

160 + 40 = 200 m2 

Type of collectors

Flat plate collectors

Type of assembly

On separate stand

Orientation of collectors

South (°)

Inclination angle to horizon

40 °

Freezing protection

Drain-down (during winter)

Overheating protection

Expansion vessel

Operation mode

High flow

Use of CSTS for

Hot tap water heating, linen washing and drying

Buffer storage

17 m3
(larger system, eight storage tanks)

Hot tap water storage

5 m3
(larger system, 2 × 2.5 m3)

Control of backup-system / CSTS

Separated 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

5 m3

Specification (if necessary)

./.


Space heating system

Type of heating system

Centralised

Number of boilers

2

Total capacity (power output) of boilers

800 kW

Capacity of each boiler (year of construction)

No. 1: 500 kW (2005)
No. 2: 300 kW (2005)

Energy source

Heating oil

Type of boiler system

Standard


Type of operation

Operator of the CSTS system

Self-operation

CSTS monitoring

No (the larger solar system has analogue heat flow meters, but nobody makes the readings)

Data accessible via internet

No

Scientific monitoring / follow up

No

Maintenance contract

No

Visualisation of the solar heat output

No


Yield of CSTS plant

Output of solar heat

not available

Origin of data

./.

Measuring point

./.

Reduction of final energy

not available

Origin of data

./.

Solar performance guarantee

No


Heat consumption

Whole energy consumption for heating purposes after CSTS implementation

not available

Origin of data

./.

Energy used for

not available

Whole energy consumption for heating purposes before CSTS implementation

not available

Total tap water consumption

12,960 m3/a

Hot tap water consumption

5,400 m3/a

Hot tap water temperature

55–60 °C

Cold water temperature

10–12 °C

 

 


Summary

The larger solar system with 160 m2 of solar collectors has a heat storage with a volume of 17 m3. This heat storage is used as buffer storage.

Tap water is heated in two heat storages with integrated tube heat exchangers by oil boilers. Buffer storage and two back-up storages are connected in succession.

The smaller solar system is used for heating of water for washing and linen drying. This solar system is connected parallel to the oil boiler and three heat storages (volume of 250 l each).

Both solar systems are filled with water and operate during summer period only. Both systems are installed on separate stands.

 

 



hydraulic scheme of 
the smaller system (40 m2)


hydraulic scheme of 
the larger system (160 m2)

 

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Financing and investment

 


Financing of the CSTS

Form of financing

not available

Distribution in percentage

0 %


Costs of solar materials

Total cost of solar system

not available

Detailed costs for

Collectors

not available

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

 

 

 

 

 

Solar systems were financed by the owner.

 

 



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

Development & experiences

Summary of experiences / Notices to the project performance

Two systems operate in Elderly home Tisje. The larger one with a solar collector aperture area of 160 m2 is used for preheating of tap water, the smaller one with a solar collector aperture area of 40 m2 for heating of water for washing and drying of linen. In both systems oil boilers are used for backup heating.
Thermal insulation of building varies due to the year of construction of the buildings. In the year 2005 an energy reconstruction was started. So far the oil boilers (2005: 500 kW and 300 kW) and tap water backup heating heat storages (2006) were replaced. In the following years the solar system will be renewed, but it is expected that national subsidy scheme for large solar systems will be established until then.

 


Experiences management

Experienced problems or failures?

Yes: there were problems with pipe leaking between solar collectors.

Found solutions to these problems or failures?

Yes, partly: in such extend that solar systems operate with water in summer time.


Financial effects / project performance

Project economically efficient?

not available

Fiscal or other financial effects?

./.

Effects on rental fees?

not available


Experiences technical staff

Experienced problems or failures?

not available

Found solutions to these problems or failures?

not available

 


 

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

Downloads

SOLARGE_goodpractice_si_tisje.pdf

this datasheet in printable PDF-format

0.9 M

tisje_scheme.pdf

the hydraulic scheme (small system)

491 K

tisje_scheme_160.pdf

the hydraulic scheme (large system)

488 K

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

Photo gallery










(1) Main entrance to elderly home Tisje
(2) Small collector field, from the East
(3) Small collector field, from the South
(4) Small collector field, from the South
(5) Large collector field, from the South-East
(6) Large collector field, from the North
(7) One of two hot tap water storages
(8) One of two back-up heaters
(9) Coil air–water heat exchanger with integrated fan