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September 23, 2013
North Middlesex Regional High School
Ashby, Pepperell, Townsend
Schematic Design Meeting 4
BUILDING COMMITTEE MISSION STATEMENT
We will proactively work with the OPM, design
team and the community, to develop a solution
that addresses our high school infrastructure
needs, meets the requirements of our student
body, enhances the district’s educational
environment for the future and will be supported
by our three member towns.
Plumbing Systems
Electrical
– Technology
– Security
Mechanical
Agenda
Plumbing and Fire
Protection
Plumbing Systems
Student & Staff Fixtures
Water Closets – Vitreous China with Battery Operated
Sensor Flush Valve, wall hung (1.28 GPF or better)
Urinal – Vitreous China Low Flow
(1 pint/flush) Battery Operated Sensor Flush Valve
Lavatories – Multi-station Terreon with Battery Operated
Sensor Faucet (0.17 gal/cycle*) * 10 sec run time
Showers – 1.8 gpm flow rate
All batteries, 10 yr life – recharged via solar/turbine
Plumbing Systems
Gas Fired Water Heating (95+% efficient heaters - gas)
Chemically Injected Active Acid Waste Neutralization
System, pre-packaged.
Storm, Sanitary and Vent Systems - Cast Iron
Domestic/Protected Cold, Hot and Hot Water Return –
Copper
Tempered Water System – Copper
Thermostatic Mixing Valves for Hot Water Temperature
Control
Circulation Pumps for Hot Water Return (VFD type)
Domestic water booster system (if required) with VFD drives
Fire Protection Systems
Wet Pipe Fire Sprinkler System
Standpipes at Stairwells with FDVs
Dry pipe Fire Sprinkler System for Loading dock
Fire Pump (if required)
Electrical Technology and Security
Electrical Distribution System
Underground Utility Service
Pad-Mounted Transformer
Feeders and Branch Circuits - Copper
Surge Suppression
Emergency Generator
Energy Efficient Lighting
LED Exterior Site lighting
High efficiency fluorescent and LED interior
lighting.
Daylight Harvesting
Programmable lighting control system
Fire Alarm System
Addressable Type
LED Site Lighting
Classroom direct/indirect lighting w/daylight harvesting
Electrical Systems
Electrical Systems
Classroom Lighting Package
Cost Per Classroom:
Pendant - $3,790
Recessed - $3,544
Installation Cost:
Pendant - 2 fixtures to feed
Recessed - 9 fixtures to feed
Pendant
Recessed
Emergency generator set
Loads
– Safety indoor lighting
– Exterior lighting at egress doors
– Boilers and circulating pumps
– Kitchen refrigeration equipment
– Data and communication systems
– Security system (access control
cameras)
– Elevator (optional)
Fuel Type
– Diesel; 200Kw outdoor unit $125k
– Natural Gas; 200Kw outdoor unit
$118k (requires AHJ approval)
Integrated Electronic Security System Access control System
CCTV system/video integration
Intrusion detection system
Technology Infrastructure Fiber optic 10gig backbone
1gig to the desktop CAT6
Integrated Classroom
Infrastructure for 100% wireless high density
condition
Intrusion System
CCTV System
System Integration
Access Control System
Integrated Classroom
Components Instructor’s Laptop
Interactive Projection System
Wireless Access Point
Wired Network
Clock and Paging System
IP Telephone Handset
Other Systems
Video Distribution System
Audio Visual Systems
– Spaces requiring projection and audio systems
– Spaces requiring audio systems
Optional Systems to consider:
– Media Server
– Data Acquisition System
Technology
Assumptions Spaces requiring projection and audio systems:
– Auditorium
– Dining Commons
– Library/ Media Center
– LGI and STEM Lab Spaces
Spaces requiring audio systems: – Gymnasium
– PE Alternative - Multi-Purpose Room
– Band
– Chorus
Technology – Audio/Visual Systems
Media Server
Provides video on-demand to
classrooms over the IP
network
Allows program storage for
future retrieval and display
Data Acquisition System
Educational tool for building
systems monitoring
Technology – Optional Systems
Three Primary Systems Access Control: Card access and remote door control
Intrusion Detection: Door position switches and motion detection
Closed Circuit Television (CCTV): Interior, exterior and video storage
Other Security Systems After-Hours Access/Lockdown- Security Grilles
Air Lock Vestibule
Site designs for physical security
Electronic Security Systems
Security Access Control
Security Access Control
Site - Electronic Security Systems
GARCIA • GALUSKA • DESOUSA Consulting Engineers Inc.
HVAC Systems Overview
GARCIA • GALUSKA • DESOUSA Consulting Engineers Inc. HVAC System Options being Studied
Baseline – ASHRAE Standard 90.1-2007 Packaged VAV System
HW coil Heat/DX Cool RTU’s, VAV Boxes with HW reheat coils for all conditioned areas
HW Heat and Ventilating Units for Storage areas and Kitchen Make-Up Air
Standard-efficiency Gas-fired Boiler Plant
Option 1 – Packaged RTU Displacement Ventilation
Gas-fired Heat/DX Cool VAV RTU’s with ERV Cooling and Displacement, VAV’s
with DCV for Administration areas, Classrooms, and Media Center
Gas-fired Heat/DX Cool RTU’s with ERV and DCV Cooling and Displacement for
Cafeteria and Gym
Gas-fired Heat and Ventilating Units for Storage areas and Kitchen Make-Up Air
High-efficiency Gas-fired Boiler Plant
Option 2 – Packaged RTU Displacement Ventilation System and Four-Pipe Induction Unit
Gas-fired Heat/DX Cool VAV RTU’s with ERV Cooling and Displacement, VAV’s with DCV for
Classrooms
Gas-fired Heat/DX Cool RTU’s with ERV and DCV Cooling and Displacement for Cafeteria and Gym
100% O.A. Gas-fired Heat/DX Cool RTU’s with ERV, 4-pipe Induction Units for Administration Areas
and Media Center
Gas-fired Heat and Ventilating Units for Storage areas and Kitchen Make-Up Air
High-efficiency Gas-fired Boiler Plant
High-efficiency Air-cooled Chiller Plant
GARCIA • GALUSKA • DESOUSA Consulting Engineers Inc. HVAC System Options being Studied
Option 3 – CH/HHW Coil RTU Displacement Ventilation System and Four-
Pipe Induction Unit
HW Heat/CHW Cool VAV RTU’s with ERV Cooling and Displacement. VAV’s with
DCV for Classrooms
HW Heat/CHW Cool VAV RTU’s with ERV Cooling and Displacement for Cafeteria
and Gym
100% O.A. HW Heat/CHW Coo RTU’s with ERV, 4-pipe Induction Units for
Administration Areas and Media Center
HW Heat and Ventilating Units for Storage areas and Kitchen Make-Up Air
High-efficiency Gas-fired Boiler Plant
High-efficiency Turbo-Cor Air-cooled Chiller Plant
Option 4 – CH/HHW Coil RTU Ventilation Units serving Four-Pipe Induction Unit
100% O.A. HW Heat/CHW Coo RTU’s with ERV, 4-pipe Induction Units for Administration areas,
Cafeteria, Classrooms, and Media Center
HW Heat/CHW Cool VAV RTU’s with ERV Cooling and Displacement for Cafeteria and Gym
HW Heat and Ventilating Units for Storage areas and Kitchen Make-Up Air
High-efficiency Gas-fired Boiler Plant
High-efficiency Turbo-Cor Air-cooled Chiller Plant
GARCIA • GALUSKA • DESOUSA Consulting Engineers Inc. Example Life Cycle Cost Analysis Summary
GARCIA • GALUSKA • DESOUSA Consulting Engineers Inc. Example Life Cycle Cost Analysis Summary
GARCIA • GALUSKA • DESOUSA Consulting Engineers Inc.
High Efficiency Heating Hot Water and
Chilled Water Plant
Boiler Plant
High efficiency (90%+) gas-fired
condensing boilers
Boiler temperature reset controls
Variable speed pumps with VFD’s
Serves building heating equipment (fin-
tube radiation, convectors, unit heaters)
Chiller Plant
High efficiency air-cooled chiller
Low Turndown; multiple compressors
Chilled water temperature reset controls
Variable speed pumps with VFD’s
Serves building induction units and
select air handling units
GARCIA • GALUSKA • DESOUSA Consulting Engineers Inc.
Central Plant - Hot Water Heating and
Chilled Water Cooling System
GARCIA • GALUSKA • DESOUSA Consulting Engineers Inc.
Packaged DX Cooling/Gas-Fired Heating
Dedicated Outside Air Handling System (DOAS)
High efficiency variable scroll
compressors
Modulating gas-fired furnace w/ hot gas
reheat
High efficiency energy recovery wheel
w/ variable frequency drive (VFD’s)
High efficiency fans w/ variable
frequency drives (VFD’s)
GARCIA • GALUSKA • DESOUSA Consulting Engineers Inc.
Displacement System
Mixed Systems DV Systems
Ec= 0.8 Ec=1.2 - 1.4
Ventilation air is delivered at low
velocity and at low levels within the
space; the system uses naturally
occurring buoyant forces within the
space to create a vertical rise of the
air throughout the space.
2-4˚ F differential supply air to space
Supply air rises when heat source is
contacted
Displaces room air upward
Air rises with pollutants to ceiling
Air returns at ceiling back to air
handling unit
70-75°F
80°F +
65-68°F
GARCIA • GALUSKA • DESOUSA Consulting Engineers Inc. Displacement System
Pros:
Excellent pollution removal
Very low noise levels
Very low air velocity
Low moisture levels
Reduced cooling loads
Reduced initial cost
Variable volume reheat is not
required
High ventilation effectiveness
Cons:
Requires perimeter radiation
heating or radiant heating
panels
Displacement Diffuser Options
GARCIA • GALUSKA • DESOUSA Consulting Engineers Inc. Displacement System – Energy Conservation
Load Calculation Reductions
Conventional System: All heat generated
in room is included in air flow calculation
since all airflow is mixed.
Displacement System: Only loads which
occur in the Occupied Zone are factored
Results in: Smaller equipment & systems
and lower installed and operating costs
for Displacement Systems
Additional Energy Efficiency Measures
Energy Recovery: Transfers energy from the
return air stream to the supply air stream to
pre-heat or pre-cool the outside air.
VAV Boxes with Demand Control Ventilation:
Modulates the airflow to each classroom in
accordance to space mounted thermostat
and CO2 sensors reducing energy
consumption due to reduced air changes.
Requires additional first cost and
maintenance costs.
Occupied Zone
Unoccupied Zone
GARCIA • GALUSKA • DESOUSA Consulting Engineers Inc.
Induction Units
Primary (Ventilation) Air is
supplied to plenum and
discharges through nozzles
Room air is induced through the
heating/cooling coils
Mixture of Primary and Room air
is delivered to room through
diffuser slots.
Condensate drain pans and
piping system for condensate
removal
GARCIA • GALUSKA • DESOUSA Consulting Engineers Inc.
Induction Units
Pros:
Energy efficient
Low Noise Levels
Flexibility of Installation
Moderate first cost
Simplified Controls (No Fans)
Lower Maintenance (No
Terminal Filters)
Cons:
Requires increased
coordination with “ceiling”
system. (e.g. flex duct isn’t an
option and condensate piping)
GARCIA • GALUSKA • DESOUSA Consulting Engineers Inc.
Building Automation and
Energy Management System
System (Zone) Scheduling
Occupied-Unoccupied Control
Night Setback Operation
Lighting Control System Integration
Increased Energy Savings
Integrate with Preventative Maintenance
Scheduling
BASE AC Diagram
Alternate AC Diagram
Order of Magnitude Cost Increase
$150K to 200K
or
Add DX Coil to Gym Unit
$50K to 75K
BASE AC Diagram
Thank You Questions and Discussions