Brazil.
The new Petros building, an extension of the Pituba complex (in Salvador), has a central atrium created in order to connect, through covered walkways integrated into the green area, all the other buildings of the Pituba complex.
It has windows with low heat emissivity, high shading factor and low reflectivity; rainwater harvesting for reuse; and the vacuum sewer system in the bathrooms, reducing water consumption.
The cooling system used was indirect expansion with production and distribution of cold water for air conditioning of comfort environments (administrative areas, meeting rooms, etc.) and technical environments (uninterrupted power supply room, substations, telematics, etc.) . It consists of five magnetic bearing chillers with a total power of 2,400 TR by condensation to water, three cooling towers and fifteen in-line pumps.
For reasons of energy efficiency, the production of cold water is carried out in three different temperature stages (± 13 ° C, 9 ° C and 4 ° C). Complementing the installation, a 24-hour condensation water cooling system, direct expansion systems with VRV, ventilation, extraction, ladder pressurization, smoke extraction and temperature control system and CO² control in the floors and garages. The total installed capacity is 4143 TR.
The control and management of the operation of the cold water pumping systems and condensation are achieved through the automation system, which consists of variable frequency units that assist the 15 electric pumps and the three cooling towers, looking for the best efficiency.
Cold water coil air conditioners have two-way flow-controlled valves. The air distribution control by Vavs is of the electronic type, with temperature sensor and proportional actuator, modulating the position of the damping flow controller from temperature and air velocity pressure signals through the box, networked with the automation system. The sensors are located in environments served by the boxes.
Source: Abrava.
