107 Campus Master Plan Update 107 C/ APPENDIX The new building loads are estimated based on the gross square footage of the proposed new buildings and the proposed use of the building. The proposed use is compared with historical data for similar buildings use in a similar climate. This is especially helpful in determining the transformer sizes for the new buildings. Most electrical transformers are loaded to about 50% of the transformer size. A conservative estimation of not more than 70% loading was used for the new building transformers to account for future load additions. Phase 1 - Near Term New buildings in this phase include approximately 150,000 square feet of health professional education and an addition to the business building. This represents approximately 1,150kVA of additional load to the campus. During this phase additional loads can be served from the existing campus switchgear; however, as new loads are being added to the east side of campus a new east feeder loop should be added to power these buildings. This east feeder loop will be connected to new switchgear in the future phase. Phase 2 - Mid Term New buildings in this phase include approximately 330,000 square feet of student housing and academic buildings plus a 1000ton chiller addition in the plant. This represents approximately 1,800kVA of additional load to the campus. During this phase new building loads continue to be added to the east feeder loop. Phase 3 - Long Term New buildings in this phase include approximately 750,000 square feet of academic buildings, student housing, administration, and an addition to the fine arts building, as well as an arena and ball fields. 2,000tons of cooling will be added to the plant in this phase. These loads represent approximately 5,000kVA of additional load to the campus. During this phase a new service to the campus will be required in the plant expansion. A new medium voltage switchgear will be added to serve additional plant loads as well as refeeding the east feeder loop added in phase 2 from this new switchgear to balance load on the campus switchgear. The new buildings and building expansions result in a new campus load of approximately 10,940kVA of new load. The existing peak building load from the AEP Texas meter is 4,337kVA placing the total new and existing loads of the campus at 15,277kVA. The total electrical capacity of the existing overhead utility line is approximately 10,000kVA, which means that the total load cannot be served by the single overhead line presently serving campus. A new overhead line, preferably served by a new electrical substation or substation transformer, is recommended to serve the campus central plant at some point during the long-term expansion of the campus. Site plans showing the existing overhead utility lines along with all the building loads can be found in attachments MEP-6 (Phase 1), MEP-7 (Phase 2), and MEP-7 (Phase 3). This distribution recommendation assumes that the present, non-redundant incoming service is acceptable to the campus. If a redundant service to the campus is desired, then further analysis and distribution equipment is required. Attachment A02, New Building Load
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