Browsing by Author "King, Carey Wayne, 1974"
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Item An analysis for promoting residential-scale solar photovoltaic (PV) in Bangkok, Thailand(2015-12) Chaianong, Aksornchan; King, Carey Wayne, 1974; Beach, Fred C; Pharino, ChanathipSolar Photovoltaic (PV) has a significant potential for distributed energy in the urban environment of Bangkok, Thailand in order to decrease the country’s reliance on imported conventional energy and enhance the country’s energy security. This research analyzes the technical, economic and policy analysis of installing 3,000 MW (Thailand’s solar PV goal) of residential solar PV in Bangkok using System Advisor Model (SAM) and also compares each analysis to large-scale load (e.g. manufacturing). In technical analysis, the relationship of distributed solar energy and electric load from the grid is analyzed. While the residential load and peak solar irradiance are not correspondent for residential scale, generating electricity from 3,000 MW of solar PV can still decrease residential daily load consumption from the grid by 38 percent. On the other hand, the distributed of solar energy and large-scale load are well matched. As a result, the large-scale peak load can be reduced by 16.7 percent from 3,000 MW solar installation. Regarding to economic analysis, the levelized cost of energy of residential scale is higher than large scale. Without tariff, costs of solar electricity are higher than grid price. Therefore, it is necessary to introduce solar tariff to encourage people to install solar PV. Throughout solar project’s lifetime, with current Thailand’s solar incentives (Feed-in Tariff; FIT), solar project investments of both scales seem feasible from financial perspectives under Thai’s government cost assumptions. In addition, due to the increasing urbanization rate and typical land use of Bangkok, residential solar PV seems to be the better candidate. However, some technical and policy barriers remain, such as the lacks of skilled manpower, policy mix, and financing options as well as the inconsistence of governmental support. It is essential for Thai government to overcome these barriers in order to create sustainable growth of solar PV in the country.Item An analysis of the city of Austin pipe networks using network and information theory metrics(2016-05) Haegele, Tess Marian; King, Carey Wayne, 1974; Huber, Karen; Faust, KaseyAustin’s rapid population growth over the past few decades has given rise to the need for additional water infrastructure and supply. There are limited funds for investment in water infrastructure so it should be spent with the goal of optimizing system robustness. A robust system comes from a balance of efficiency and redundancy. There are two methods used in this analysis to establish baseline metrics. Information Theory and Network Theory are based on the connectivity of the system looking at efficiency and redundancy. These theories are used by first converting the water pipe networks into a graph of nodes and links, extracting a connectivity matrix, and converting the data to “igraph” format in the statistical computing software R for analysis. The Network Theory calculations are built in to the “igraph” package in R and the Information Theory calculations are based on the equations developed by Robert Ulanowicz. The starting point metrics of this study can be replicated for the main and wastewater systems and built upon considering operational and hydraulic characteristics unique to the system in future work, and eventually inform utility decisions.