1 / 24

4-Year Private Liberal Arts College: Founded 1857 1,455 Undergraduate Students 13,000 acre Domain atop the Cumberlan

4-Year Private Liberal Arts College: Founded 1857 1,455 Undergraduate Students 13,000 acre Domain atop the Cumberland Plateau in southern middle Tennessee. About 100 Buildings totaling 1,300,000 square feet

huyen
Download Presentation

4-Year Private Liberal Arts College: Founded 1857 1,455 Undergraduate Students 13,000 acre Domain atop the Cumberlan

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 4-Year Private Liberal Arts College: Founded 1857 1,455 Undergraduate Students 13,000 acre Domain atop the Cumberland Plateau in southern middle Tennessee

  2. About 100 Buildings totaling 1,300,000 square feet Cool Fact: we have more plant species on the Domain than there are in Great Britain

  3. “Sewanee – The University of the South (TN) takes top honors as the most beautiful campus” August 2, 2010

  4. How can a small, liberal arts college, lacking engineering students, accomplish the twin goals of achieving energy conservation and student learning?

  5. Can we team bright students with an experienced EC engineer, start with a period of intense technical learning, and end up doing energy audits and saving energy? How far and deep can we get?

  6. Categories of Energy Conservation Measures Simple: low-cost/operational Behavioral Complex/capital-requiring (esp. HVAC)

  7. The good news is that the Jessie Ball duPont Foundation has funded for us five student summer EC interns each year for three years? The bad news is that only one of the first group of interns had ever even taken a physics class!

  8. What we have done previously Building Automation System (BAS) Limits space temperatures to specific range during occupancy Sets back and shuts down systems during unoccupied periods Controls ventilation using CO2sensors Uses outside air temperature deadbands to keep systems off seasonally Resets hot water supply temperature with outside air temperature Variable Air Volume systems Super low-flow lab fume hoods in our new science buildings (one LEED Silver and one LEED Gold) Heat wheel for lab exhaust/make-up air systems in the Spencer Hall science building

  9. Very high efficiency chilled water plant which serves central campus air conditioning featuring very low (0.54)kw/ton centrifugal chillers; variable secondary chilled water flow; and most-open-valve control of chilled water flow to air handling units. Very high efficiency condensing hot water boilers and domestic water heaters in many locations Lighting retrofits for virtually all fixtures on campus: T12 to T8 fluorescents; electronic ballasts; compact fluorescents; LED exit lights; high-pressure sodium outdoor lights; some LED pilot installations. Motion sensors and photocells used extensively to control lighting Low-flow shower heads throughout all residence halls Low-flow toilets in most buildings Front-loading clothes washers in all residence halls

  10. Quick study of: Utility bills --- consumption and demand Basics of energy, power, work Electric circuits Combustion Lighting basics Heat transfer HVAC: peak loads, weather and part loads, psychrometrics, comfort, refrigeration systems, air and water distribution, control methods Energy Conservation Measures (ECMs)

  11. Some Key Findings Building temperatures are too cold in summer and warm in winter due to lack of a campus policy for occupied and unoccupied periods. Occupied periods are too long due to: Accommodation of “stragglers” and their rare complaints Avoidance of call-backs on the argument that the cost of a few call-backs due to aggressive scheduling negates any energy savings Solutions: Institute a campus building energy-use policy that establishes occupancy periods and occupied and unoccupied temperatures the buildings will maintain Add override controls in the building to allow stragglers to get short-term HVAC

  12. Some Observations Eight weeks is borderline for completing both training AND individual energy audits. Next time should: Reduce time spent on tasks not directly related to energy auditing Lengthen period of internship Consider at least one intern returning for a second summer in a leadership role Interns need more technical knowledge as a prerequisite: Select interns with prior education or experience Offer physics class on energy conservation fundamentals (being developed and will be offered in the spring) This was a valuable learning experience for the interns even though actionable energy audits were not finally completed.

  13. Formula for Energy Conservation at a Small College Leader with comprehensive EC expertise Policies that establish comfort expectations for occupied and unoccupied states Students who have completed: A. Class on energy conservation fundamentals (usually Physics Dept.) B. Summer energy audit training Establish academic-term student interns (teamed with facilities HVAC experts and building managers) --- one intern per building to: Recommission building operations to satisfy comfort policies and schedules (with facility HVAC expert) Establish energy savings operational strategies and behaviors (with building managers) Identify retrofit ECMs requiring capital and pursue approvals Monitor utility usage for the building (either from utility bills, or even better, from building real-time meters)

More Related