Building

Type of building

Hotel

Number of users / dwellings, floors

137 users
7 floors

Year of construction

2005

Total effective area (heated)

192 m²

Hot tap water consumption

3,395 m³/a (calculated)

Whole energy consumption for heating purpose after CSTS implementation

108,648 kWh/a

System engineering

Year of construction of CSTS

2006

Type of collectors

Flat plate collectors

Thermal power

90 kW_therm.

Aperture area of collectors^*)

130 m^₂

Buffer storage

12 m³

Hot tap water storage

./.

Total capacity of boilers with energy source

155 + x kW, natural gas

Type of hot tap water heating

Centralised

Type of heating system

Centralised

Costs

Total cost solar system

59,913 Euro

Cost of the CSTS / gross area of collectors

416 Euro/m²

Subsidies

30 %

Output

Output of solar heat^**)

79,158 kWh/a

Reduction of final energy^***)

113,083 kWh/a

CO_2-emissions avoided

26 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

Owner

INVERSORA DEL REINO DE VALENCIA

Operator (ESCo)

ELECNOR, S.A.
C/ Marqués de Mondéjar, 33
28028 Madrid, Spain
Phone: +34 91 417 99 00
elecnor(at)elecnor.es
www.elecnor.es

Description of the CSTS

Year of construction of CSTS

2006

Thermal power

90 kW_therm.

Gross area of collectors

144 m²

Aperture area of collectors

129.6 m² 

Type of collectors

Flat plate 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

Low flow

Use of CSTS for

Hot tap water heating

Buffer storage

12 m³ (3 × 4 m³)

Hot tap water storage

./. 

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

not available 

Specification (if necessary)

Separated back-up heater/boiler for hot water heating only: standard, natural gas, 2004, capacity not available

Space heating system

Type of heating system

Centralised

Number of boilers

1

Total capacity (power output) of boilers

155 kW

Capacity of each boiler (year of construction)

No. 1: 155 kW (2005)

Energy source

Natural gas

Type of boiler system

Standard

Type of operation

Operator of the CSTS system

ESCo

CSTS monitoring

Yes: The output of solar heat. The ESCO supervises the data.

Data accessible via internet

No

Scientific monitoring / follow up

No

Maintenance contract

Yes: one to three times a year

Visualisation of the solar heat output

Yes

Yield of CSTS plant

Output of solar heat

79,158 kWh/a

Origin of data

Design (calculated)

Measuring point

not available

Reduction of final energy

113,083 kWh/a

Origin of data

Designed data

Solar performance guarantee

Yes

Heat consumption

Whole energy consumption for heating purposes after CSTS implementation

108,648 kWh/a

Origin of data

not available

Energy used for

Hot tap water heating

Whole energy consumption for heating purposes before CSTS implementation

221,731 kWh/a

Total tap water consumption

not available

Hot tap water consumption

3,395 m³/a

Hot tap water temperature

45 °C

Cold water temperature

12.3 °C

Summary

The installation is formed by 72 SOLAHART collectors, mod. L, situated in a suitable area. The 72 collectors are divided into 12 batteries of 6 collectors. The system uses a variable temperature control system which operates the primary and secundary circuits.

The collector heat is transferred to the storage tank by an external heat exchanger. The variable temperature setting to start/stop the circulation pumps is 6 ºC.

System use: ACS with a solar fraction of 80%.

Installer

SACLIMA S.L.
Elena Salazar Mir
Pol. Ind. "Els Mollons
C/Torners, 21
46970 Alaquas (Valencia), Spain
Phone: +34 96 151 61 62
Fax: +34 96 151 22 88
info(at)saclima.com
www.saclima.es

Collectors' manufacturer

Solarhart industries
Rob meesters
Vlamoven weg 12
5708JV Helmond, Netherlands
Phone: +31 492579696
Fax: +31 492579694
r.meesters(at)solahart-europe.com
www.solahart.com

Financing of the CSTS

Form of financing

Purchase

Distribution in percentage

20 % loans
30 % subsidies (granted by the Valencia Energy Agency)

Costs of solar materials

Total cost of solar system

59,913 Euro

Detailed costs for

Collectors

34,710 Euro

Elevation / mounting structure

4,692 Euro

Storage / heat exchanger

16,890 Euro

Backup heater

./.

Control

888 Euro

Installation

./.

Planning / Engineering

./.

Others (system of pumping)

2,750 Euro

Operation costs of heating system

Increase of the operation cost after CSTS implementation

not available

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?

./.