Joe Shiau, P.E., C.E.M.,
Sr. Market Advisor, Engineer I
Southern California Gas Company
Southern California Gas Company (SoCalGas), Brookfield Residential Properties, and the Los Angeles Department of Water and Power (LADWP) partnered to demonstrate a commercial near-Zero Net Energy (near-ZNE) project in Playa Vista, California. “The Resort” is a 25,000 square-foot residents’ club with fitness rooms, demonstration kitchen, classrooms, event rooms, and outdoor swimming pools and spas. It is LEED for New Construction 2009 Platinum® certified and features passive ventilation, green roofs, variable refrigerant heat pumps, natural gas-fired water heaters, space and pool heaters, and an energy dashboard. Onsite generation is led by a 62.5 kW solar photovoltaic (PV) and supplemented by a 75 kW combined heat and power (CHP) system. The main building was modeled for 2010 California code compliance, with Design Time Dependent Valuation (TDV) approximately 12% below the code standard, equivalent to 6.6% if actual process loads as observed are added to an adjusted baseline. On that adjusted baseline, onsite generation decreased the total project TDV by approximately 14.6%, with PV and CHP contributing in a 2:3 ratio. PV and CHP together decreased carbon emissions by approximately 116,000 pounds CO2e, credited one-half to PV and one-half to CHP. This paper provides the results of the first year of monitoring and demonstrates the roles natural gas can play in ZNE initiatives.
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