| Summary: | 碩士 === 國立臺北科技大學 === 冷凍與低溫科技研究所 === 91 === This study is based on BACnet communication protocol that was published by ASHRAE. The relationships between the DDC (Direct Digital Control) applications and network communication protocol are discussed. The backgrounds and frameworks of BACnet, including its protocol on “Objects, Properties, and Services” are described. Visual Basic programming was used to design a communication program to communicate with DDC that conforms to BACnet protocol. Database management programming was then used to collect data from DDC systems.
In addition, the integrated concept of BACnet is applied to the building energy monitoring. The energy consumption data were collected by digital power meters, and communicated via BACnet protocol so to integrate the building energy database. The building energy database includes the energy consumption of various equipments in the building, presented as Energy Use Intensity (EUI) and Demand Use Intensity (DUI). Analyzing monitoring data could help to understand the energy consumption trends, and in the analysis of energy saving potentials and control strategies for the building.
An example, energy monitoring system was used to acquire the energy consumption of various equipments of a supermarket, and presented as EUI and DUI. In this example was used gateway to translate and communicate two different protocols — BACnet and Modbus.
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