SOLARGE

El Llimonet

Vilanova i la Geltrú, Catalonia, Spain

Multi family house | 138 sqm installation

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Project summary · Technical description · Financing · Development · Downloads

Project Summary

Description

The Vilanova El Llimonet solar thermal installation was one of the first residential buildings in which Qualitat installed a CSTS. It was not mandatory by law to install a solar thermal system. With this project, the project developer and the Engineering/Installer company (BCN Cambra Logica Projectes and BCN ECO-INSTAL) wanted to demonstrate the technical, economical and environmental feasibility of a residential building designed with a low energy concept including a solar thermal installation for hot tap water.
The hot tap water system is based on a semi de-centralised solar system with natural gas as auxiliary energy source.




 


Building

Type of building

Multi family house

Number of users / dwellings, floors

240 users
80 dwellings
5 floors

Year of construction

2000

Total effective area (heated)

not available 

Hot tap water consumption (measured/estimated)

not available

Whole energy consumption for heating purpose after CSTS implementation

48,587 kWh/a


System engineering

Year of construction of CSTS

2000

Type of collectors

Flat plate collectors

Thermal power

92 kWtherm.

Aperture area of collectors*)

132 m2

Buffer storage

8 m3

Hot tap water storage

./.

Total capacity of boilers with energy source

1,968 kW, natural gas

Type of hot tap water heating

Decentralised

Type of heating system

Decentralised


Costs

Total cost solar system

not available

Cost of the CSTS / gross area of collectors

not available 

Subsidies

40 %


Output

Output of solar heat**)

65,432kWh/a

Reduction of final energy***)

81,790 kWh/a

CO2-emissions avoided

19.3 CO2/a

Solar performance guarantee

*) 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

 

 


Rafel Florenciano, Qualitat Commercial Director:

"The Vilanova El Llimonet solar thermal installation was a success. Qualitat (the project developer) tried to introduce new eco-friendly technologies in their buildings. They wanted to differentiate from the rest of project developers by building energy efficient dwellings. Qualitat wanted to put the company a step further than their competitors. Thanks to the lack of problems during the installation and running of the CSTS, and the economical and environmental feasibility, Qualitat adapted the CSTS installations as a standard measure in all new building although it was not mandatory at the moment."

 

 


Owner

QUALITAT PROMOCIONS
Rafael Florenciano
Rambla Arnau de Vilanova, 2
Vilanova i la Geltrú, Catalonia, Spain
Phone: +34 93 8142960
Fax: +34 93 8141875
grupqualitat(at)grupqualitat.com
www.grupqualitat.com

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Technical description

 


Description of the CSTS

Year of construction of CSTS

2000

Thermal power

92.4 kWtherm.

Gross area of collectors

138 m2

Aperture area of collectors

132 m2 

Type of collectors

Flat plate collectors

Type of assembly

On flat roof

Orientation of collectors

South (0°)

Inclination angle to horizon

50°

Freezing protection

Glycol

Overheating protection

Expansion vessel

Operation mode

High flow

Use of CSTS for

Hot tap water heating

Buffer storage

8 m3: 80 × 100 l (each dwelling has a storage tank with a volume of 100 l)

Hot tap water storage

./.

Control of backup-system / CSTS

Separated control: general temperature differential control for solar system, individual control thermostat for each back-up heater (apartment). Back-up heater will only start if solar storage temperature is not sufficient.


Hot tap water system

Type of hot water heating

Decentralised

Recirculation system

No

For decentralised systems:
The installation on the consumer site

Individual buffer storage tanks

Size of storage for hot tap water

./.

Specification (if necessary)

./.


Space heating system

Type of heating system

Decentralised

Number of boilers

80

Total capacity (power output) of boilers

1,968 kW

Capacity of each boiler (year of construction)

all: 24.6 kW (2000)

Energy source

Natural gas

Type of boiler system

Standard


Type of operation

Operator of the CSTS system

Self-operation

CSTS monitoring

Yes: output of solar heat (ABB RV731-3 energy meter. The meter is placed in the collector circuit)

Data accessible via internet

No

Scientific monitoring / follow up

No

Maintenance contract

Yes: twice a year

Visualisation of the solar heat output

No


Yield of CSTS plant

Output of solar heat

65,432 kWh/a

Origin of data

Design (calculated)

Measuring point

not available

Reduction of final energy

81,790 kWh/a

Origin of data

Calculated (key numbers)

Solar performance guarantee

No


Heat consumption

Whole energy consumption for heating purposes after CSTS implementation

48,587 kWh/a

Origin of data

Estimated (from key numbers)

Energy used for

Hot tap water heating

Whole energy consumption for heating purposes before CSTS implementation

135,488 kWh/a

Total tap water consumption

2,880 m3/a

Hot tap water consumption

not available

Hot tap water temperature

45 °C

Cold water temperature

12 °C

 


 


Engineering, Installer

BCN CAMBRA LŇGICA - ECOINSTALL
Raul Robert
Sant Joan, 8
08629 Torrelles de Llobregat
Barcelona, Catalonia, Spain
Phone: +34 93 6890136
Fax: +34 93 6890545
ecoinstal@bcnprojectes.es
www.bcnprojectes.es

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Financing and investment

 


Financing of the CSTS

Form of financing

Purchase

Distribution in percentage

40 %


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

 




Introduction

The investment is profitable for the tenants, although it is not known in detail how this affects the energy costs for gas. The tenants didn‘t pay a higher price for the dwelling due to the implementation of the solar system. The additional costs were covered by the developer, so for them the investment was not profitable in a direct way.

 

The system was subsidised by direct subsidies form the national and regional government, in total 40 %.

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Development & experiences

Qualitative aspects of the CSTS

The need for innovation, energy savings and the respect for the environment oriented policy of the developer, initiated the installation of the first CSTS.
The planning and installing of the CSTS was integrated from the first moment of the design of the building. The engineering company presented the design to the municipality who accepted the initial project.

 


Experiences management

Experienced problems or failures?

Yes: There were some minor problems related to the maintenance of the system.

Found solutions to these problems or failures?

Yes


Financial effects / project performance

Project economically efficient?

Yes for tenants
No for investors

Fiscal or other financial effects?

No

Effects on rental fees?

not available


Experiences technical staff

Experienced problems or failures?

No

Found solutions to these problems or failures?

./.

 



Summary of experiences / Notices to the project performance

The installation was divided in several sub-systems due to the technical situation of the building. The project developer has the idea that if the system would be one total installation for the whole building it would be more optimal. In fact, all following buildings with solar thermal systems were installed in that way. The recommendation would be to install one large collective collector system with individual boilers for each dwelling. It should be also taken into account how the maintenance of the system will take place once the project developer delivers the dwellings to the tenants.

This building was one of the first installations of the project developer, and the good results obtained, helped the company on keep on installing solar thermal in their buildings although it was not mandatory at the moment. Although this first experience was quite good, the aim of doing things better, makes the technicians to improve the solar thermal installations. This first project was seen as an opportunity for the project developer to show the end user and the market, that it was possible to implement solar thermal without high additional costs. From this project onwards, all new buildings developed by Qualitat, a CSTS was integrated.

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Downloads

SOLARGE_goodpractice_es_elllimonet.pdf

this datasheet in printable PDF-format

0.9 M

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

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