|Assessment on the impact of non-auto start air conditioning system
|Wang, Shengwei (BSE)
|Hong Kong Polytechnic University -- Dissertations
Air conditioning -- Control
Buildings -- Energy conservation
|Department of Building Services Engineering
|89 pages : color illustrations
|Nowadays, buildings consume a lot of energy every day especially in some developed cities such as Hong Kong. Compared with the newly constructed buildings, the energy waste in existing buildings is more serious. All-water air conditioning systems are quite commonly used in many commercial buildings. The cost of operating such HVAC systems remains very high. Thus, optimization strategies of those independent heating/cooling devices such as air conditioners and fan coil units need to be reconsidered for reducing energy wastage. This work proposes an occupancy-based control strategy for air conditioning systems which use fan coil units as cooling devices by the method of reprogram the digital controllers of FCUs to achieve the goal of changing users' operating patterns and saving energy in both demand side and supply side. This new strategy was tested on the 8/F of Block Z in the Hong Kong Polytechnic University from October 2018 to December 2018 and would be expanded to other floors in the future. In this study, we focus on assessing the impact on the energy consumption of implementing non-auto start air conditioning system. Based on analyzing experiment data and simulation results, several findings such as occupancy operating patterns, energy saving potential in different time periods are shown. Besides, we predicted that the non-auto start system could save about 6.98% of total electricity use in the whole building.
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