June 14, 2015
June 14, 2015
June 17, 2015
Energy Conversion and Conservation
26.520.1 - 26.520.17
Development of a Laboratory set-up interfacing Programmable Logic Controller (PLC), VariableFrequency Drive (VFD) and HVAC ApplicationsIn this day and age, technology is improving the system performance and saving energy. From being ableto use cellular phones as cameras, computers the sizes of notebooks, and vehicles that run on renewableenergy other than fossil fuels. Building automation is delegating the task of controlling the systems of abuilding such as lighting, electrical, HVAC, and mechanical systems of a building, to a computer. Whilethis control is an incredible feat of technology, its primary purpose is to conserve energy. Two of the mostpopular pieces of building automation equipment are Programming Logic Controllers (PLC) and VariableFrequency Drives (VFD).The Variable Frequency Drives (VFD) is a device used to save energy. Most commonly used in drivingmotors of pumps, fans, and HVAC systems of commercial and residential buildings. These devicesfunction by granting the user control of the output of a motor by regulating the frequency. ProgrammingLogic Controllers (PLC) are devices that can be used to control the automated processes in machines.The purpose of this paper is to demonstrate the design and implementation of an experiment, from basiccomponents, based on real powered electrical circuits that include a variable Frequency Drive (VFD) tocontrol the three phase variable speed motor of a fan integrated to a Programming Logic Controller(PLC). Our objective is to verify several alternatives of this technology to control the variable-frequencymotors on fans to manage the volume of air moved to match the demand of the system. Thus objectivesare: System integration of different electrical components to make a whole system composed of: PLC, VFD, three phase motor, motor starters, relays, contactors, transducers, weather station, and Ethernet communication system. Experimental investigation of several alternatives (a) the power factors, inductive reactance and resistance for the fan motor, as a function of the frequency, (b) the electrical power measured for different value of the frequency, Development of a better understanding as to how each of the above factors impact the energy consumption, Development of appropriate and novel methods to design and to analyze the control of ventilation system, Quantitative estimation of the energy saving potential in practical applicationsMost importantly, project methodology will be discussed. We discuss the capstone design program fromstudents’ point of view, and the experience earned in design, integration, and also in written and oralcommunication skills. Methodology used to evaluate the effectiveness of the capstone design program interm of learning outcomes is also described.
Megri, A. C. (2015, June), Development of a Laboratory Set-up Interfacing Programmable Logic Controller (PLC), Variable Frequency Drive (VFD) and HVAC Applications Paper presented at 2015 ASEE Annual Conference & Exposition, Seattle, Washington. 10.18260/p.23859
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