Climaveneta units installed at the new Cajamar HQs in Almeria, Spain.
Cajamar Caja Rural is the first cooperative and rural bank in Spain with more than 1.3 million associates and more than 3.9 million customers. The banking house is now completing the transfer of its employees to the new headquarters in the Parque Científico-Tecnológico of Almeria, the Spanish province with the highest per capita income.
The new office building aims at unifying the activities of all the subsidiaries, while a floor will be rented to IBM, where a new datacenter will be installed.
With a total investment of about 17 million Euros, this 19,600 square meter architectural colossus is able to accommodate over 990 workers and aims at obtaining the LEED GOLD certification, in full compliance with the Cajamar environmental policy.
Alfonso Monje De Pro, belonging to Arapiles Arquitectos and based in Almería, who signed the architectural project, says: “This building can be summarized in three words: functionality, meaning flexibility in the use of interior space, innovation for the pioneering use of some materials, and above all sustainability for the choice of highly efficient M&E systems and the LEED GOLD certification it aims at obtaining. ”
Many architectural and plant engineering choices were carried out with this purpose starting from the building envelope that has been designed considering the orientation of the building and the possibility of making the maximum use out of the natural sunlight and the weather characteristics of the area.
The facade is composed of several kinds of high quality and high capacity ventilation cells used for the first time as outer cladding and thermal and acoustic insulation. The roof, a mixed system that combines porcelain and greenery, supported by the inner tube located under the raised floor, helps to reduce the “heat island” effect, bringing all the benefits of a real “cold coat”.
The photovoltaic system, with a potential energy of about 44,100 kWh per year, has been architecturally integrated on the roof of the building and covers most of the energy needs of the building.
Particular attention has also been paid to water consumption, with the creation of an artificial lake that can contain more than 30,000 liters of water and acts as a Smart Tank, collecting rainwater and condensation, to satisfy the needs of non-potable water as the irrigation of the green roofs and gardens.
Francisco Javier Magan, facility manager of the building, says: ” In designing the new building Cajamar not only focused on energy efficiency but also on internal comfort, providing the best working place for its employees”.
FOCUS ON AIR CONDITIONING
The HVAC is based on a 4-pipe air to water system, set with variable speed.
Climaveneta units satisfy air conditioning needs all year round utilising hot and cold water production.
Going into detail, they have installed one multi purpose i-FX-Q/SL-CA 0802 unit for the simultaneous production of heating and cooling with inverter driven compressors and two TECS2/SL-CA-E 0512 chillers with magnetic levitation compressors. The high efficiency units are able to work on the basis of the real loads, regulating the power and thus reducing the total energy consumption of the building.
In particular the i-FX-Q, INTEGRA unit for 4-pipe systems, is able to satisfy the demand for hot and cold water simultaneously through a system that does not require seasonal switching and is therefore a valid alternative to traditional plants with a chiller and boiler.
On the other hand the TECS2, here selected in super silent class A version, is a flexible and reliable unit that easily adapts to different thermal load conditions thanks to the precise thermoregulation together with the use of inverter technology.
Air is distributed in the offices through high head fan-coils, in a built-in version, a-LIFE2 HP to ensure perfect comfort all year round.
Aurelio Pérez Martín general manager of Savener Proyectos says: ” Designing technological equipment for modern and innovative buildings, carries different challenges and opportunities each time. The skill of the designer must be to learn about existing technologies and integrate them in a wise and far-sighted way, even anticipating the future needs of the building’s occupants.”
The whole HVAC system is managed by ClimaPRO, the new chiller plant control with active optimization.
The system sets the air conditioning and pump functioning, managing and optimizing thermal and cooling energy production. As a matter of fact at Cajamar, thanks to the 4-pipe system, ClimaPRO improves the building’s performance by redistributing energy loads between units. By exploiting an advanced heat recovery system it is possible to satisfy the different, even opposing, needs. ClimaPRO is thus able to outright react to comfort needs, that request hot and cold production in an independent and simultaneous way, eliminating the lead time of a traditional 2-pipe system.
The Climaveneta supply is completed by 4 close control units for the data center cooling: 4 i-ADU 50 dual fluid, inverter unit, air condensed with lower air intake. Close control units are connected to chillers for the
primary water circuit and to the primary remote condensers on the roof for the secondary direct expansion or backup
The ventilation is a mixture of natural and forced solutions, the latter obtained through the opening of the windows overlooking the internal patio. This solution allows for keeping low CO2 levels, while containing energy consumption.
The different architectural and engineering measures adopted at the new Cajamar headquarters in Almeria will enable energy savings equivalent to 21 tons of oil per year and avoid CO2 emissions of 101 tons per year.