A new technology from Rickard measures air flow at the diffuser and helps to maintain air quality while minimising costs.
Fantech have been marketing and distributing the Rickard VAV diffuser range as an alternative to traditional systems since 2011. An innovative new technology now available is the Rickard air flow sensor which has been designed to work with its range of ceiling and linear slot electronic Variable Air Volume (VAV) diffusers. It accurately measures the pressure of air as it exits the diffuser and relays this to the Master Communications Unit (MCU) software to calculate the air flow (l/s) and total pressure (Pa). This can also be communicated to the BMS (BacNet, ms/ tp or LONworks) for ongoing monitoring. Fantech Product Manager – Intelligent Ventilation Systems Peter Henry said integrating the Rickard air flow sensors with the BMS had several advantages. “It simplifies commissioning and overall air balancing which can be done electronically,” he said. In static commissioning mode the user sets the pressure that will be maintained during system operation whereas the adaptive commissioning mode allows the user to set the diffuser to a minimum and maximum air flow value.
If pressures rise too high, the diffuser reduces the air flow to the designated maximum level, therefore reducing energy consumption and preventing over-cooling or heating. Peter said mechanical consultants are now specifying a minimum air requirement for particular rooms in hospitals, universities and office areas in commercial buildings. “The minimum position on the sensor ensures that sufficient air is always delivered to that space,” he said. “Rickard electronic VAV diffusers with integrated air flow sensors can provide precise volumes of air with less than 10% error. In applications where air flow requirements are less critical, sensors can be fitted to one diffuser in each zone. When used correctly, the BMS monitors air flow levels, so diagnostics easily identify problem areas.” Energy consumption can also be monitored and building airflow fine-tuned to optimise energy usage performance. Peter said this was particularly important in older buildings where some of the duct work may have moved or been damaged affecting the performance of the ventilation system.
“This is a great new product that will save building developers on several levels. To help introduce customers to the new technology the first time the contractor uses this product Fantech will be on hand to provide field training.” Contact your local Fantech office for further information on the Rickard air flow sensor or range of VAV diffusers. .