I NDUSTR I AL BU I LDI NG SOLUT ION
87
— HVAC Control
Controlling, monitoring, and recording functionalities are achieved using DDC controller & server software via either hardware interface to individual equipment using various sensors like temperature, pressure etc. and actuators like control valve, relays, damper actuator etc. or high-level interface to other systems using building automation protocols such as BACnet, Modbus, LON, KNX etc.
Car park ventilation system
Thermal comfort
Indoor air quality
Due to continuous vehicular movement inside closed car park, airborne contaminants such as co and no2 can accumulate and cause significant concerns to occupants. The co and no2 levels must be controlled or ventilated when concentrations approach unsafe levels. Carbon monoxide and nitrogen dioxide sensors are installed and connected to ddc controller to monitor the contaminant level. Based on the algorithm output written inside the ddc controller, output signal is generate to control supply air fan, exhaust air fan and jet fans to maintain required ventilation.
Thermal comfort is “that condition of mind that expresses satisfaction with the thermal environment and is assessed by subjective evaluation” thermal comfort can be impacted by temperature and humidity of surrounded environment. Thermal comfort applications ensure installation of necessary instrumentation system to monitor and control thermal comfort panel. In occupied space thermal comfort can be achieved using hvac equipment such as ahu, fcu, vav and chilled beam among others.
Indoor air quality (iaq) refers to the air quality within and around buildings and structures, especially as it relates to the health and comfort of building occupants. Considering human spent 70% of time indoors, it is vital parameters in overall health and wellness of occupant. Indoor air quality can be improved by 2 ways i.E. Replacing existing air with fresh air or removing pollutants, particulate matter or pathogen from existing air. In both cases, air pollutants or particulate matters needs to be measured. Device which is used to measure quality of air is referred as an indoor air quality (ioq) sensor and it measure concentration of air pollutants such as co, so2, nox, o3, thc and particulate matters such as pm25 and pm 10 continuously all year round. The measured data can be remotely monitored and exported in various formats. Robust monitoring helps to guard against extreme events by alerting people and initiate action. Indoor air quality sensors data can be monitored by integrating it with building management system via bacnet or modbus or directly via cloud if sensors are iot enabled.
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