Product / system manufacture
Product / system supply
mac group / Max Fordham
TROX X-CUBE / X-AIRCONTROL modules / X-AIRCONTROL Zonemaster
Trox supplied a complete air conditioning solution for a prestigious redevelopment project of 53,000 sq ft of office space across 9 floors at 21 Dartmouth Street, London. This solution needed to combine optimum comfort conditions with outstanding environmental performance.
Components include precision engineered TROX X-CUBE air handling units (AHUs), X-AIRCONTROL modules, and the X-AIRCONTROL Zonemaster, with advanced zone control technology.
Two TROX X-CUBE air handling units link to damper actuators, pressure, temperature and humidity sensors, as well as heat recovery control and fan control strategy. Both units incorporate thermal wheels with pre-programmed strategies, selected to meet BVU efficiency in accordance of the ErP 2018 standard. The pre-set algorithms facilitate rapid reactions to changes in building load.
TROX’s X-AIRCONTROL is integrated with the X-CUBEs and with a TROX X-AIRCONTROL Zonemaster to address the needs of the different occupied spaces across the site. The building is divided into 20 X-AIRCONTROL zones, each of which has a TROX TZ-Silenzio supply controller and a TROX TA-Silenzio extract controller. The X-AIRCONTROL zone modules combine information from humidity, temperature and PIR sensors. The system recognises all digital sensors automatically and uses measured values to initiate control procedures.
The X-AIRCONTROL modules also collect information from air quality (VOC) sensors, which can be an invaluable tool in refurb projects, where large amounts of volatile organic compounds can remain present due to new furnishings/fittings and decorative work. This monitoring of VOC levels was vital to avoid poor ventilation and its negative impacts on productivity for building occupants.
The 20 zone modules are integrated with the TROX X-AIRCONTROL Zonemaster which provides a single point connection to the BMS for all of the zones via Modbus TCP or BACnet IP.
A fan optimisation strategy, controlling fan speeds based on damper blade position, enables energy consumption to be reduced significantly. Another advantage of the reduced system pressures/fan speeds is a reduction in noise, providing acoustic levels that are ideal for office applications.
To ensure that the building was ideal for IT-intensive office premises, TROX Silenzio air supply and extract units were selected for each zone. These units can obtain an accurate airflow measurement without the requirement for lengths of straight air duct in advance of each module. This reduces the space and ducting requirements, making it much easier to integrate the units in a congested ceiling space.
‘Increasingly, designers of HVAC systems for prestige commercial properties are exploiting the advanced control capabilities incorporated into the air handling equipment itself. This provides an extremely effective alternative to bespoke programming of the BMS, and delivers increased levels of zone-based control for occupants of the building. The 21 Dartmouth Street project is an excellent example of this approach, and we are proud to have played our part in the redevelopment of this prestigious site.’ Ian Thomas, Product Technical Manager – Air Products at TROX UK
Trox’s air conditioning system enables the building to achieve best-in-class energy efficiency and occupant comfort.