USING FUZZY LOGIC TO CONTROL A VAV AIR CONDITIONING SYSTEM IN COMBINATION WITH A GREEN WALL

In today's world, people spend an average of 80%-90% of their time indoors; therefore, health risks can be greater from polluted indoor air than from polluted outdoor air. In many cities around the world, the ventilation and air conditioning system has become an important tool for achieving comfort inside most buildings. Some studies have shown that common houseplants can provide prevention of rising levels of indoor air pollution and purification of air inside buildings through biofiltration and phytoremediation (release of oxygen through photosynthesis) and this provides a natural way to help combat Sick Building Syndrome. In addition, plant evapotranspiration can be used to cool the air and control humidity around the plant environment. The use of vegetation as a tool to improve the overall indoor environment is an area that needs more research to prove the real impact of different green systems in the indoor environment. Typically, office spaces are significantly affected by fluctuations in indoor and outdoor conditions on the microclimate of the air environment. The comfort conditions of the air environment, which are formed by the temperature and humidity conditions, are characterized by a dynamic change in the intake of harmful substances throughout the day. For energy-efficient provision of indoor microclimate parameters, it is necessary to supply the amount of outdoor air as needed at a given time, i.e., to use a variable-flow ventilation and air conditioning system. A control algorithm for the VAV ventilation and air conditioning system was developed, taking into account the dynamics of changes in pollution (CO2), temperature and humidity in the room and the integrated living wall (phyto-conditioning, biofiltration). To build the optimal system, a plant analysis was conducted to take into account certain requirements, such as lighting conditions, climatic conditions, and growing medium.