High Performing Buildings - Winter 2013 - (Page 62)

Standard 90.1-2004. While the envelope saves energy by reducing mechanical loads, energy efficiency is further enhanced by an airhandling unit (AHU) with an energy recovery unit (ERU) that is modeled to save more than 300,000 Btu/h at design conditions, a condensing unit, a high efficiency boiler serving One of two classrooms. Occupancy sensors turn systems off when the rooms are vacant, and CO2 sensors control ventilation rates based on occupancy. a heating coil in the AHU, hydronic baseboard heat, and reheat coils on the VAV boxes. Perimeter baseboard radiation provides consistent and uniform perimeter heating, providing greater occupant comfort. The AHU consists of a minimum outside air damper, an economizer hot water preheat coil and a June 2011–June 2012 GaS uSe 1.6 1.4 1.2 1.0 .8 .6 .4 .2 0 Jun therms in thousands energy use intensity of 41.8 kBtu/ft2 and an ENERGY STAR rating of 99. The energy model indicated that the building would perform 35% better than the baseline code (ASHRAE/ IESNA Standard 90.1-2004) and after two years of operation, the actual performance is 41% better. The most important elements that contribute to the building’s energy efficiency are: • A high performance building envelope; • Properly sized mechanical systems with heat recovery; • Efficient lighting design including daylighting; and • An integrated, open control system to control HVAC, lighting, metering, access, video surveillance and life safety. The control system keeps the building working efficiently and alerts the occupants of problems right away so they can be corrected. Operational analytics identify additional energy saving opportunities. The building envelope includes continuous R-19 insulation on the exterior walls, R-30 insulation on the roof and high performance glazing that contribute to an envelope that is 20% better than ASHRAE/IESNA 62 Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun electricity uSe 16 kWh in thousands 15 14 13 12 Jun June 2011–June 2012 Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Submetered electricity uSe 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Jun June 2011–June 2012 kWh in thousands Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Exterior Lighting Plug Load Interior Lighting HVAC Total Electricity Use HigH Performing Buildings Winter 2013

Table of Contents for the Digital Edition of High Performing Buildings - Winter 2013

High Performing Buildings - Winter 2013
Commentary
Contents
Kensington High School for the Creative and Performing Arts
Mercy Corps World Headquarters
Hood River Middle School Music and Science Building
UC Davis Health and Wellness Center
Gateway West Sustainable I
Technologies on Display
Advertisers Index

High Performing Buildings - Winter 2013