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A Voltage Flicker Suppression Device For Residential Air Conditioners And Heat Pumps, John Fox
A Voltage Flicker Suppression Device For Residential Air Conditioners And Heat Pumps, John Fox
All Theses
In some circumstances, voltage flicker due to the inrush current of residential heat pump can be a fairly visible to the residents as a slight flashing of the household's lights during the compressor starting event. The voltage flicker problem is caused by a variable contribution from sizable equivalent power system impedances and considerable inrush currents drawn by compressors. While this is not a new problem, and there are technologies on the market that attempt to alleviate the voltage flicker issue, no current solution attempts to correct for the problem at its root cause.
This thesis presents a device designed to …
Pump Sequencing Optimization, John S. Allan, Kyle J. Nekimken, Spencer B. Weills
Pump Sequencing Optimization, John S. Allan, Kyle J. Nekimken, Spencer B. Weills
Mechanical Engineering
The purpose of this document is to demonstrate the design, production, and testing of optimum pump sequencing logic for variable frequency drive (VFD) pumps in commercial heating ventilating and air conditioning (HVAC) systems. The product will be developed by Pump Efficiency Solutions (PES), which is a group of Cal Poly students working on their senior project. The product is being developed for Trane, an industry leader in large scale HVAC systems. MATLAB™, Microsoft Excel, Pump System Improvement Modeling Tool™ (PSIM), and fluid mechanics hand calculations were used during software development. Next, we converted the program into Trane’s graphical programming language …