Energy Efficient Controller For Improving Thermal Comfort Iaq And Energy Saving In Hvac System

摘要

In modern day office building, the term Heating, Ventilating and Air-Conditioning (HVAC) plays an inevitable role, facilitating a healthy and comfortable environment for the occupants. With growing emphasis on adaptive flexibility, the part played by controls has become a vital aspect in deciding the overall system performance. Until recent past, two-position and Proportional-Integral-Derivative (PID) controls served the purpose to a majority extent. But, greater innovations like Demand Control Ventilation (DCV) have thrown light on a better and more advanced control system based on Fuzzy logic. For a basic Constant Air Volume (CAV) system, when coupled with DCV, the precise ventilation load adjustments can only be achieved with a simple fuzzy based instrument, saving the more obvious cooling energy. In the present work, a systematic comparison of the three controllers namely two-position, PID and the concept under observation "fuzzy" is done with reference to the thermal comfort, Indoor air quality (IAQ) and energy savings up to 27.5% for a HVAC system. The ongoing study has lead to establishing the importance of fuzzy based controller and its significantly better thermal comfort and IAQ than other conventional controllers. Surely this work helps in strengthening the growing prominence of fuzzy controls in HVAC applications.