Phil Mackey

Electrical/Lighting
Holy Cross Hospital - North Addition
Silver Spring, MD

This is a student-generated Capstone Project e-Portfolio (CPEP) produced in conjunction with the AE Senior Thesis e-Studio.

Welcome to Phil Mackey's AE Senior Thesis e-Portfolio

Final Report

The Final Report focuses on an in-depth analysis of 2 lighting spaces and the normal and emergency electrical distribution system as well as two breadth analyses.  The lighting design focuses on two spaces: the out-patient registration area and the main lobby.  The electrical depth portion of the report investigates an alternative distribution of the normal branch transformers and the isolation of the North Addition's emergency power system. The breadth topics will investigate the impact the transformer redistribution has upon the construction and mechanical disciplines.

Compiled Final Report (17.4 MB)

Project Summary and Background (1.10 MB)

Lighting Introduction (140 KB)
          The lighting redesign for the Holy Cross Hospital - North Addition focuses on 2 spaces: the out-patient registration area and the main lobby. As with any lighting design, each space should be aesthetically pleasing as well as function properly according to the space's intent. In doing so, one must design a lighting system that compliments the architecture of the space while efficiently and effectively delivering ample light levels to the task plane. Lastly, this proposed system must be desirable from a sustainability point of view by being easy to maintain and keep operational.
     - Registration Space (2.06 MB)
     - Lobby Space (2.43 MB) 

Electrical Introduction (219 KB)
          The electrical redesign for the Holy Cross Hospital - North Addition focuses on 2 separate alternatives and the effectiveness of their implementation in comparison to the existing electrical system. The first alternative will consider the cost impact of replacing six existing 480Y/277V to 208Y/277V step-down transformers located throughout the addition with a single 480Y/277V to 208Y/277V step-down transformer and all electrical system issues associated with that change. The second alternative will entail a much more in-depth look at the hospital's electrical system and emergency back-up. I will investigate the feasibility of provide an emergency back-up generator for the entire North Addition portion of the hospital (both emergency and normal branches) and will investigate the financial implications this change will have on the project.
     - Alternate 1 (599 KB)
     - Alternate 2 (835 KB) 

Construction Management Breadth (229 KB)
          With such a significant change to the electrical distribution system concerning Alternate 2, I wanted to further investigate the impact these changes would have on the construction end of the project. In doing so, I will address several different areas that might be affected by such a change to the overall system.

Mechanical Breadth (249 KB)
          Due to the addition and deletion of several transformers in each electrical room, I will be resizing the required cfm and all associated ductwork and VAV boxes. Although not detailed here, this should save the hospital money by decreasing the duct sizes and VAV boxes in most cases.

References (166 KB)
Acknowledgements (141 KB)

Appendix (6.79 MB)

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