Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

Sorted by: relevance · author · university · dateNew search

You searched for +publisher:"Utah State University" +contributor:("Marv Halling"). Showing records 1 – 2 of 2 total matches.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


Utah State University

1. He, Yi. Cost-Effective Planning Strategies for Battery Electric Bus Systems.

Degree: PhD, Civil and Environmental Engineering, 2020, Utah State University

In recent years, actions have been taken by countries around the world to create a more sustainable energy future. Electrifying transit buses is considered as a promising option to reduce emissions and increase sustainability of the transportation sector. However, there are still several barriers to the adoption of electric buses (e-buses). The barriers include, but are not limited to, the range limitations of e-buses, high up-front costs of e-buses, large capital expenses for charging infrastructure, and a lack of understanding regarding e-bus operation and management. This dissertation aims to overcome these barriers through the development of cost-effective planning strategies from the strategic and operational perspectives. Fist, this dissertation investigates the strategic planning problem of battery electric bus (BEB) fast charging stations in a multimodal transportation network with the objective of minimizing the total e-bus system cost. Second, assuming the layout of the transit system and the deployment of charging infrastructure as given, this dissertation presents an optimization model to enhance the charging schedule of a fast charging BEB system. To consider the interaction between the system infrastructure design and the charging schedule of a BEB system, this study further develops two comprehensive planning strategies. Numerical analyses demonstrate that the proposed planning strategies can effectively reduce the cost of BEB implementation. Advisors/Committee Members: Ziqi Song, Patrick Singleton, Marv Halling, ;.

Subjects/Keywords: Strategic planning; operational planning; battery electric bus systems; demand charge; Civil and Environmental Engineering

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

He, Y. (2020). Cost-Effective Planning Strategies for Battery Electric Bus Systems. (Doctoral Dissertation). Utah State University. Retrieved from https://digitalcommons.usu.edu/etd/7924

Chicago Manual of Style (16th Edition):

He, Yi. “Cost-Effective Planning Strategies for Battery Electric Bus Systems.” 2020. Doctoral Dissertation, Utah State University. Accessed May 09, 2021. https://digitalcommons.usu.edu/etd/7924.

MLA Handbook (7th Edition):

He, Yi. “Cost-Effective Planning Strategies for Battery Electric Bus Systems.” 2020. Web. 09 May 2021.

Vancouver:

He Y. Cost-Effective Planning Strategies for Battery Electric Bus Systems. [Internet] [Doctoral dissertation]. Utah State University; 2020. [cited 2021 May 09]. Available from: https://digitalcommons.usu.edu/etd/7924.

Council of Science Editors:

He Y. Cost-Effective Planning Strategies for Battery Electric Bus Systems. [Doctoral Dissertation]. Utah State University; 2020. Available from: https://digitalcommons.usu.edu/etd/7924

2. Sorensen, Taylor J. Reducing Thermal Bridging and Understanding Second-Order Effects in Concrete Sandwich Wall Panels.

Degree: PhD, Civil and Environmental Engineering, 2019, Utah State University

Structural engineers have traditionally detailed structures with structural and fabrication efficiency in mind, but often based on a limited understanding of thermal efficiency. Some connection designs can create significant thermal bridging, leading to unnecessary heat transfer and even premature degradation through condensation. Thermal bridging occurs when heat transfer is given a path through a more conductive material like concrete or steel rather than insulation. Concrete sandwich wall panels (SWP) tend to be highly efficient at preventing heat transfer in the middle of panels, with greatest heat transfer occurring at connections. This project identified thermally efficient details for future SWP construction to reduce heat transfer, lessen environmental impact, and increase sustainability of SWP structures. It can be particularly difficult to avoid thermal bridging at corbel connections, so 12 corbel specimens were created and tested to provide alternative corbel design options for engineers. Nine details were successfully created and are presented. Corbel specimens were modeled using the Beam-Spring Method with good agreement. After validating the Beam-Spring Model, a parametric study investigated effectiveness of the PCI Second Order Analysis and the effect of length, panel stiffness, and wythe configuration on SWP behavior under axial and flexural loads. Advisors/Committee Members: Nick Roberts, Marv Halling, Andrew Sorensen, ;.

Subjects/Keywords: sandwich wall panel; thermal bridging; heat loss; beam spring model; axial loads; second order effects; thermal detailing; corbels; Civil and Environmental Engineering

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Sorensen, T. J. (2019). Reducing Thermal Bridging and Understanding Second-Order Effects in Concrete Sandwich Wall Panels. (Doctoral Dissertation). Utah State University. Retrieved from https://digitalcommons.usu.edu/etd/7642

Chicago Manual of Style (16th Edition):

Sorensen, Taylor J. “Reducing Thermal Bridging and Understanding Second-Order Effects in Concrete Sandwich Wall Panels.” 2019. Doctoral Dissertation, Utah State University. Accessed May 09, 2021. https://digitalcommons.usu.edu/etd/7642.

MLA Handbook (7th Edition):

Sorensen, Taylor J. “Reducing Thermal Bridging and Understanding Second-Order Effects in Concrete Sandwich Wall Panels.” 2019. Web. 09 May 2021.

Vancouver:

Sorensen TJ. Reducing Thermal Bridging and Understanding Second-Order Effects in Concrete Sandwich Wall Panels. [Internet] [Doctoral dissertation]. Utah State University; 2019. [cited 2021 May 09]. Available from: https://digitalcommons.usu.edu/etd/7642.

Council of Science Editors:

Sorensen TJ. Reducing Thermal Bridging and Understanding Second-Order Effects in Concrete Sandwich Wall Panels. [Doctoral Dissertation]. Utah State University; 2019. Available from: https://digitalcommons.usu.edu/etd/7642

.