Attachment 05 - Energy Efficiency Design Standards.pdf

MICHAEL E. DeBAKEY VAMC

HOUSTON, TX

Energy Efficiency Design Standards

Designs shall incorporate premium efficiency solutions to all issues related to water and energy.

Lighting:

Use of T-8 F28 or F25 lamps with Premium energy savings ballasts.

LED Exit signs (Replace all non-LED in project area with

LED)

Use of T-5 lighting (where applicable) Use of day lighting Use of light sensors etc to harvest natural day light Use dual technology occupancy sensors No incandescent lighting All pilot/indicator lights to be LED Use occupancy sensors in all appropriate locations (equipment/storage rooms, mechanical/electrical rooms with keyed-switch override, restrooms and locker rooms, offices, conference rooms, lounges/staff areas, all hallways in non-patient areas

Motors:

Premium efficiency motors with VFD drives.

HVAC:

Maximize recirculation air to the extent permissible per ASHRAE Std 62.1 procedures subject to VA HVAC Design Manual minimum OA requirements Air handlers with full economy cycles (where applicable) Air Handlers with thermal recovery systems (where applicable) VFD drives on all fan motors.

Night set back reducing air flow and allowing temperatures to swing through a larger range Use of VAV system where possible Allow a maximum of thermostats for individual control of temps in rooms (limit allowable temp range through programming) Enthalpy controls (where applicable) Full DDC control

No single pass cooling with domestic water. Single pass with chilled water ok if it is returned through the chilled water return system.

Controls:

DDC controls with night set back.

Full commissioning of controls for any new equipment put on the system Consider use of CO2 sensors for control of air flow in common rooms, waiting rooms, conference rooms etc (VAV systems only) Allow a maximum of thermostats for individual control of temps in rooms (limit allowable temp range through programming) Put lighting on DDC controlled contactors to shut lights off during non-operational hours (where conditions allow)

Chillers Use centrifugal chillers with VFD drives on all systems 500 ton and larger Use micro centrifugal chillers for all chillers 30 – 200 ton All new chillers to be tied directly into building management systems for monitoring and control.

Boiler Plants Boilers shall have stack economizers.

Boilers shall have automatic blow down.

New Boilers shall have combustion air fans on VFD drive.

Only the highest efficiency boilers should be considered for new plants.

Boilers shall have automated oxygen trim controls

Medical Equipment:

Highest energy eff equip avail (when a choice is available) Select non-conditioned space for location of condensers when separate system cooling is required. (Place condensers in interstitial space, roof space, out doors etc) Increase exhaust air for rooms with large pieces of medical equipment to exhaust excess heat. (minimize return air for these rooms) When using a line UPS/Line conditioner, make sure unit draws power from the line side of the rectifier. (non-energy issue, but a good practice)

Washrooms/Bathrooms Urinals shall be waterless Toilets shall be low flow and/or dual flush Sinks shall be laminar flow

Sinks shall use incorporate sensors for automatic tempered water flow for hand washing Use hot water recirculation where possible

Windows/Glass Use of insulated glass (where conditions allow) Use of Low-E glass

Irrigation Include grey water systems for irrigation system (i.e., roof drains, etc.). Minimize the use of potable water.

Design shall comply with the following:

Energy Policy Act of 2005 (EPACT 2005) Energy Independence and security Act of 2007 (EISA 2007) Be designed to exceed the current ASHRAE 90-1 standards for energy by at least 30% if life cycle cost effective.

VA HVAC Design Manual, March 2011 Current VA Sustainable Design Standards