High Performing Buildings - Summer 2012 - (Page 32)

© Nic Lehoux for the Miller Hull Partnership buildings as well as the traditional waterfront buildings. The Resource Building promotes the rich maritime heritage of the community with a chandlery (retail space), small vessel rental and storage, exhibits and information gallery, community meeting rooms, and office spaces for maritime partner organizations. The warm yellow color of the building pays homage to the color of the traditional maritime buildings of this area. The buildings surround a paved public plaza, which links the NWMC Education Pier, an adjacent public jetty and boardwalk and the buildings. The plaza also houses major community events and ensures public shoreline access in kEy sustainablE fEaturEs HVAC Water source heat pumps use the near constant ocean water temperatures as a heat source or sink; Heat recovery ventilator provides tempered ventilation air to retail space Daylighting Clerestories run the length of the buildings, daylight sensors Individual controls: Separate thermostatic controls in private of ces Materials Forest Stewardship Councilcerti ed glu-lam framing, dimensional lumber, plywood products, tongue and groove decking, and nish wall paneling, trim and cabinetry perpetuity. A second-level balcony rings the plaza and connects the two buildings while providing views of Port Townsend Bay and the Cascade and Olympic mountain ranges. The Northwest Maritime Center’s on-thewater programs include team-building long boat crews, sailing lessons, Sea Scouts, youth and adult sailboat racing and the opportunity to take the helm of a historic schooner. Climate Port Townsend sits on the protected waters of the Puget Sound and has a very mild climate tempered yearround by the proximity of the sea. The peak summer design temperature is only 81°F, and the peak winter design temperature is 22°F. Cooling is rarely ever needed if operable windows are provided for natural cooling. Energy Efficiency Measures Energy efficiency measures include natural ventilation during most of the year and, when natural ventilation isn’t possible, heat recovery and demand control ventilation systems. However, the most significant source of the project’s energy savings derives from the sea, which serves as a source of thermal energy. Early in the design process, the project team recognized the energy savings potential of the site’s most obvious resource: the temperate waters of the Puget Sound. Given the project’s other strong connections to the sea, it was natural to Summer 2012 embrace this opportunity by harnessing the near constant water temperature (~50°F) as an efficient heat source/sink for the high efficiency water source heat pumps located in each building. The heat pumps are connected in a closed loop to titanium heat exchangers located in the deep waters below a new pier. The oceansource geothermal system supplies all of the buildings’ HVAC and domestic hot water heating needs at efficiencies more than 300% better than a similarly sized gas-fired or electric resistance system. Each building is provided with space conditioning through a combination of ducted air systems, radiators, fan coils and radiant floor delivery systems. Pumping energy between the buildings’ central closed water loop and the ocean heat exchanger is reduced through the use of variable speed pumps. The circulation pumps are set up to maintain a constant differential loop pressure, varying the pump speed up and down to maintain occupant comfort. 32 HIGH PERFORMING BUILDINGS

Table of Contents for the Digital Edition of High Performing Buildings - Summer 2012

High Performing Buildings - Summer 2012
Commentary
Contents
High Tech High Chula Vista
Kiowa County Schools
Northwest Maritime Center
La Reunion’s ENERPOS
Wilfred Uytengsu Sr. Center
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High Performing Buildings - Summer 2012