Theses and Dissertations from UMD

Permanent URI for this communityhttp://hdl.handle.net/1903/2

New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a give thesis/dissertation in DRUM

More information is available at Theses and Dissertations at University of Maryland Libraries.

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    ENERGY ANALYSIS OF A METRO TRANSIT SYSTEM FOR SUSTAINABILITY AND EFFICIENCY IMPROVEMENT
    (2023) Higgins, Jordan Andrew; Ohadi, Michael; Mechanical Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    The industrial sector in the US accounted for 33% of the overall energy consumption and 23% of total GHG Emissions in 2022, necessitating the need for energy efficiency and decarbonization of this sector. This study identifies common opportunities and challenges while performing energy audits for the State of Maryland public transportation maintenance complex and proposes site-specific energy efficiency measures. Utilizing performance indices such as Energy Use Intensity (EUI) and load factor from end-use energy data, as well as walkthrough observations from energy audits, energy efficiency measures specific to each facility were formulated to augment the overall energy performance. Additionally, energy modeling helped pinpoint the additional scope of energy efficiency improvements that could have potential significant energy performance improvements and reduce on-site GHG emissions. Among the energy conservation measures considered, the re-sizing and decarbonization of HVAC equipment has the greatest contribution to energy and GHG savings, with a 100% decrease in natural gas, a 37% decrease in electricity use annually, and net decrease of 272 Mton CO2. This study aims to highlight the similarities and differences in existing transportation and maintenance facilities and the applicable technology(ies) that could streamline and serve as a guide for energy audits for transportation maintenance facilities by demonstrating the most common energy efficiency measures and subsequent achievable savings for these facilities.
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    Energy audit and modeling of two multi-purpose buildings on the College Park Campus of The University of Maryland
    (2020) Shrestha, Devashis Man; Ohadi, Michael; Singer, Farah; Mechanical Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    Gossett Football House and Biology-Psychology Building are two high-energy consuming, multi-purpose buildings in the University of Maryland, College Park, Campus. This thesis details the energy analysis and energy model development for these buildings to identify energy savings opportunities. The research was conducted in three phases per building: (I)-A comprehensive summary of relevant building information collected from the energy audit walkthroughs and study of building records, followed by building utility analysis and benchmarking. (II)- Energy model development to simulate building energy consumption which was calibrated according to ASHRAE-14 guidelines. (III)- Analysis and simulation of savings from energy conservation measures to increase energy efficiency and reduce the carbon footprint of the respective buildings. Combined savings of 3,876 MMBtu, 787,290-gal water, and $100,800 per annum along with 515 MT CO2eq emission reductions per annum were projected for the two buildings. These savings directly contribute to the campus sustainability goals and increase the energy efficiency of the campus buildings.