NAVFAC Capital Improvements GOV Energy Baseline and Offerors Model Performance Rating Assumptions.pdf

P-997 SOF NSWTG-2 Combat Service Support Facility JEB Little Creek–Fort Story, Virginia Beach, 1626397

REFERENCES

NAVFAC CAPITAL IMPROVEMENTS

GOV ENERGY BASELINE

& OFFERORS MODEL

PERFORMANCE RATING ASSUMPTIONS

(PRA)

The GOV Energy Baseline and Offerors Model Performance Rating Assumptions shall be utilized for technical evaluation factor six (6), Energy & Sustainable Design. This summary shall serve no other purpose. The assumptions listed here shall not be considered as RFP requirements.

BASELINE BUILDING PERFORMANCE RATING ASSUMPTIONS

The GOV Energy Baseline Report provides a rough order of measure estimate of the “Baseline”

(Code Minimum) energy consumption for this project, based on ASHRAE Std 90.1‐2013

Appendix G. The proposer is advised that the goal for this project is to reduce estimated annual energy consumption by 30% less than ASHRAE 90.1‐2013 as calculated in accordance with US

Code of Regulations 10 CFR 433, 434, 435 dated Dec. 4, 2006.

The Gov Baseline building for this model has been simplified for evaluation purposes. The

Baseline building is assumed to be a typical facility of the type indicated, of the same size and in the same ASHARE Climate Zone as the project location. The Gov Baseline is a parametric model based on these simplified parameters. The Gov baseline does not reflect all of the specific requirements of the RFP.

OFFERORS PERFORMANCE RATING ASSUMPTIONS

The following assumptions and clarifications should be considered before proceeding with a

Proposed Building simulation:

The offerors Proposed Building energy model shall reflect the offerors proposed building, meeting or exceeding all requirements of the RFP. The model shall use the modeling rules of ASHRAE

90.1‐2013 Appendix G. The model shall use the following assumptions within the model as appropriate:

Weather Data:

• Weather location shall be based on TMY Weather Data for Norfolk, VA.

Space Occupancy:

• Refer to the Building Requirements and Room Requirements Sheets in Part 3 and the drawings in Part 6 to determine the number of occupants on a space‐by‐space basis. Model occupancy based on the actual planned use of the spaces as indicated by furniture layouts on the drawings rather than code maximums.

Space Schedules:

• Lighting Schedule: ASHRAE 90.1‐2013, Space Usage Classification: Office Occupancy Table

G‐G (ASHRAE 90.1‐2013 User Guide)

• Thermostat Schedule: ASHRAE 90.1‐2013, Space Usage Classification: Office Occupancy

Table G‐G (ASHRAE 90.1‐2007 User Guide)

• People Occupancy Schedule: ASHRAE 90.1‐2013 Space Usage Classification: Office

Occupancy Table G‐G (ASHRAE 90.1‐2013 User Guide)

Design Temperatures:

• Occupied temperature setpoints shall be in accordance with RFP Part 3 D30.

Unoccupied space temperature setpoints shall be modeled as follows:

o All occupied spaces unless otherwise noted: 81 deg F cooling, 64 deg F heating, o Laboratory spaces, Telecom rooms, server rooms: no setbacks o Spaces that are heated and ventilated only: no setbacks

Infiltration Assumptions:

o Infiltration shall be included on perimeter zones only. If the offeror proposes to use air barriers with testing to 0.25 cfm/ft2 (envelope) at 0.3" WG, he may simulate tight building construction. If the offeror proposes to use air barriers with testing to 0.15 (or lower) cfm/ft2 (envelope) at 0.3" WG, he may simulate zero building infiltration. Note that while these credits may be taken to demonstrate EPAct compliance, there is no standardized methodology to take credit for reductions of infiltration in LEED. Do not take credit for reductions in infiltration when assessing LEED EAc1 point feasibility unless the methodology has been vetted by approved by the Guiding Principles third party reviewer.

Additional Space Loads:

• Model all office and classroom spaces with 1.5 W/sf miscellaneous plug loads unless otherwise noted in the RFP. Model all applied instruction spaces with 5 W/sf miscellaneous plug loads unless otherwise noted in the RFP. Model the Telecom rooms with 300 W miscellaneous plug loads.

Domestic Water Heating:

• Service Hot Water ASHRAE 90.1‐2013 Space Usage Classification: Office Occupancy Table

G‐G (ASHRAE 90.1‐2013 User Guide)

• Domestic Water peak hourly demand in gallons per minute: Use the latest version of

International Plumbing Code (IPC) water supply fixture units Table E103.3 Approach.

• Domestic Water daily demand based on gallons per minute: Peak hourly demand divided by a factor of 3 for the Daily Demand.

Miscellaneous:

• Exterior Lighting shall be modeled per ASHRAE 90.1‐2013 Table 9.4.3B.

Utility Rates:

• The electric utility rate (burdened) for the project is $0.10/kWh. No demand charges shall be considered.

• Purchased steam not available.

• The natural gas rate (burdened) for the project is $0.49/therm.

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