Download Energy - draft report

Energy
Goals
1. Maximize use of daylight to reduce energy consumption
2. Optimize the building envelope to reduce energy consumption of heating, cooling and
mechanical ventilation.
3. Use energy metering to minimize unintended energy use for lighting and temperature control
4. incorporate energy efficient electrical and mechanical systems to reduce energy use
1. Lighting & Daylighting
Daylighting
Will the building be located and oriented to maximize opportunities
for daylighting?
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Will the window sizing and placement optimize energy-savings and
maximize daylighting?
Are design strategies being implemented to maximize daylight for
upper floors?
N/A
Are design strategies being implemented to bring light deeper into
occupied spaces and provide uniform lighting?
Will window glazing be selected to optimize energy-savings and
daylighting (i.e. high visible transmittance (VT))?
Are shading devices being integrated to minimize overheating and
glare?
No controls
Daylighting (continuous dimming)
Daylighting (multiple step dimming)
Daylighting (on/off)
Are lighting controls being integrated?
Occupancy sensor
Occupancy and daylighting (continuous dimming)
Occupancy and daylighting (multiple step dimming)
Occupancy and daylighting (on/off)
Maximize daylighting by special configuration:
New GSB buildings are oriented in the way that the larger façade area faces South. Daylighting
opportunities are maximized on a daily basis. About 45% of the façade area will be windows,
and portion of it will be glazed glass walls. Internal light shelves will passively aid the
penetration of daylight deeper into the occupied spaces.
Glazing
The window glazing will be high performance thermally broken double pane insulated units that
are spectrally selective and contain a low-emissivity layer. Areas of glazing will have an
integrated photovoltaic frit glass. Total glazing will be optimized to assure the best ratio of light
transmission to heat transmission. 45% of the exterior vertical cladding of the building will be
glazed with this material.
Lighting Control
further reduce lighting load through the use of a “continuous/off” dimming system.The building
installed energy density in Watts/sq. ft. due to lighting will be reduced through optimized installed
power density and foot candle requirements. Daylight dimming systems will further reduce
lighting load through the use of a “continuous/off” dimming system.
2. Building Envelope
Optimization of building envelope
Will building form and thermal massing be used to minimize heat loss
through the building envelope?
Yes
No
In cold climates, will glazing with a low U-factor be used?
Yes
No
Yes
No
penetrating into the building?
Yes
No
Will there be a continuous air barrier?
Yes
No
Will materials be used to meet or exceed the ASHRAE 90.1-2004 or State
Energy Building Codes standards with respect to thermal resistance and
maintaining interior comfort?
Are measures being considered to prevent groundwater or driven rain from
Thermal Mass
Thermal mass comes from the concrete materials used for walls, ceilings and floor slabs.
Being exposed in vertical and horizontal configurations, they are used as a passive cooling
device to allow radiant cooling. The building will be night flushed using cool night air to
pre-cool the thermal mass; during the day, the thermal mass effectively absorbs heat to relieve
load on the building’s cooling mechanical systems.
Water-proofing & Air Barriers
The new GSB building is engineered to be sealed from moisture intrusion. The stone masonry
walls will incorporate a cavity between the stone veneer and the metal stud and sheathing
assembly substrate to weep from the wall any moisture that penetrates the outer masonry
wythe. Concealed masonry flashings will be flexible metal flashing in combination with a
self-adhering membrane. Vertical waterproofing will be provided at basement foundation walls.
Water proofing to the Faculty Office Building quadrangle over garage will be modified bitumen
asphaltic membrane.
Wall insulation will be accomplished using a continuous layer of rigid foam board – extruded
polystyrene (XPS) insulation applied to the exterior sheathing. The insulation will be designed
to provide twice code baseline performance.
Roof insulation shall utilize continuous board insulation (Polyisocyanurate material), twice
code minimum. Clay tile roofing will be applied to fire retardant plywood substrate. A roof
membrane will be provided.
Complete envelope air infiltration sealing will be required including certified blower door test.
Materials for Interior Comfort / Exceeding Code Standards
Roof and wall systems will transmit 50% less heat than in a code compliant building via a
doubling of the code required insulating capacity.
The roof membrane will be a light colored (light grey or white) to achieve high albedo (0.3
reflectance) and be highly reflective. Thermoplastic polyolefin sealants will be selected on the
basis of performance, substrate material, and economy, and are expected to include both silicon
and urethane based materials.
The external building shades will passively control solar insolation falling on the building facades.
Metering
Energy metering
Will there be interval metering or sub-metering of major energy
uses?
Yes
No
N/A
Additional sub-metering will be provided for lighting, receptacle power and mechanical
equipment power loads so that the owner can monitor the energy use of the building for ongoing
information and optimization and per LEEDTM recommendation.
Energy Efficient Systems
Energy-efficient systems
Will the following lighting features be integrated?
high efficiency lamps
Yes
No
luminaires with electronic ballasts
Yes
No
task lighting where suitable
Yes
No
appropriate personal lighting controls
Yes
No
N/A
Select one
Standard gas
boilers
Will high efficiency (modulating or condensing) boilers be integrated
Modulating boilers
into the building?
Condensing boilers
N/A
Will high efficiency chillers be integrated into the building?
Yes
No
N/A
Will co-generation be integrated at the district or the building scale?
Yes
No
N/A
Will heat pumps be integrated?
Yes
No
N/A
variable speed drives on variable air volume distribution systems
Yes
No
energy-efficient motors on fans/pumps
Yes
No
Yes
No
Will the following energy-efficient systems be integrated?
Will building automation systems be integrated?
Fossil
What type of fuel will be used to heat the service water?
Electric
Will hot water saving devices be integrated?
Yes
No
Are strategies being developed to integrate high efficiency elevators
in the building and/or to minimize the need for overall elevator
Yes
No
N/A
usage?
Are other energy-saving systems or measures (e.g. displacement ventilation,
heat recovery systems or desiccant humidification) being considered?
Description:
Yes
No
- Where possible, cost effective, and safe, air system
- Where ventilation requirements are low, re-use of c
- Spaces within the interior/core zones are mechanica
Efficient Lumination
The New GSB buildings use highly energy efficient lamps such as LED. Light fixtures in offices
will be fluorescent type with linear T8 or T5 lamps and electronic ballasts. Dimming
ballasts will be used in all areas receiving enough natural daylight to meet the work plane
lighting levels (below) without supplemental artificial lighting. Light fixtures in offices,
corridors and public toilets will be controlled by occupancy sensing devices, which
indirectly achieves task-lighting and personal lighting control standards imposed by Green
Globes.
Power Generation and Consumption system
No boiler is used because the main heating source will be provided by 125 psi campus steam
interconnection. No chillers are needed because cooling will be provided by interconnection to the
existing campus chilled water loop. A constant temperature variable flow secondary circuit will
distribute heating water to the AHU coils via 100% redundant VFD driven pumps.
Heat pump (what’s “integrating heat pumps”?)
Assume variable speed drives on variable air volume distribution systems and energy-efficient
motors on fans/pumps both used
Assume building automation system integrated
Assume fossil fuel
Other Energy Saving Measures
Where possible, cost effective, and safe, air systems incorporate heat recovery via heat pipes.
Where ventilation requirements are low, re-use of conditioned building return air through air
handling unit mixing will be employed.
Spaces within the interior/core zones are mechanically ventilated using in-wall displacement
ventilation at approximately 0.4cfm/sf