1. © Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. HP BLDG. 6A Server Lab Energy Efficiency Measures August 16, 2012 Prepared By: Ken Cooper, P.E.

2. © Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. Hewlett Packard Global Real Estate Project Manager: Dave Arnold Sustaining Engineer: John Vogler Sustaining Engineer: Bob Weber, P.E. Enterprise Servers, Storage & Networking (ESSN) Lab Infrastructure Transformation (LIT) Sandy Correa PROJECT TEAM 2 Gensler Architect Palo Alto Utilities Key Account Rep: Bruce Lesch DPR Construction General Contractor Cooper Preuit Engineers Mechanical Engineer: Ken Cooper, P.E Enovity, Inc. Energy Efficiency Program Consultant Engineer: Tim Huang, P.E

3. © Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. Project Description  37,000 square foot Server Lab  Server Load: 150 Watts/SF expandable to 200 W/SF  Lab located in existing 48 year old, 48,000 SF single story building with only one exterior wall. Remaining three walls are shared walls with other buildings or below grade.  Entire building roof required replacement due to excessive leaks. Existing center high bay area in the center of the building was to remain.  Server lab was located on a 30” raised floor with under-floor cool air supply  Server racks vary in size (some new racks and some existing racks relocated from other HP sites)  A new chiller plant building, located near Building 6A, was added to serve the new lab.

4. © Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. Energy Efficiency Measures  EEM 1 - Hot aisle containment with Non-ducted air side economizer with barometric relief : Clear vinyl curtains were hung from the ceiling to contain the heat exiting from the server racks. Cool outside air is supplied to the lab without the use of any additional fans. By over sizing the air intakes and relief louvers we were able to introduce outside air without using supplemental fans.  EEM2 - Maximize chiller efficiency: By using chillers with variable speed drives, raising the chilled water supply temperature to 55 o F, and lowering the condenser water temperature the chiller efficiencies are as low as 0.35 kw/ton average.

5. © Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. EEM 1 – Hot Aisle Containment w/Outside Air Economizer

6. © Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. EEM 1 – Building Section at CRAH Units

7. © Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. EEM 1 - Liebert CRAH unit with Economizer Dampers

8. © Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. EEM 1 – Liebert CRAH unit with Economizer

9. © Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. EEM 1 - Aisle Containment Curtains

10. © Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. On top of HP 6A roof prior to construction The high bay “pop-up” is in the foreground.

11. © Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. On top of HP 6A roof after construction High bay ”pop-up” in-filled with relief louvers and two large “saw-tooths” outside intakes added on the roof

12. © Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. EEM 1 – Cooling Savings w/Outside Air Economizer

13. © Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. EEM 1 – Economizer Energy Savings

14. © Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. EEM 2 – Maximize Chiller Efficiency Variable Speed Drive 55 o F CHW Supply Condenser Water Reset to 60 o F

15. © Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. EEM 2 - Condenser Water Temperature Reset Chart

16. © Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. EEM 2 – Tested Chiller Efficiency Chart

17. © Copyright 2012 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. EEM 2 - Chiller Energy Savings