Page 60 - Zero Net Energy Case Study Buildings-Volume 2

CASE STUDY NO. 8
IBEW-NECA JATC TRAINING FACILITY
Cumulative Net Energy Performance July 2014 - June 2015
Net Energy Production
Net Positive
Net Zero
The chart above showing Cumulative Energy Balance over the course of the year also illustrates the net positive energy performance. Since the chart begins in July 2014, the curve goes up at first since the net production is positive in the summer months. The curve then turns and goes down through the winter months as the solar energy production is poor, turning up again as the sunny spring season in this location begins in late February.
Post Occupancy: Observations and Conclusions
The renovated building is performing at ZNE or better at the conclusion of a design process that incorporated practical cost criteria with innovative design strategies. The project illustrates that even when cost considerations and practical constraints common to standard renovation proj- ects direct design decisions, there remain effective design strategies that can be used to achieve a ZNE performance.
Post Occupancy: Controls and Monitoring
Engaging a master system integrator during design and continuing through the early operation of the facility has proven to have enormous benefit for the owner of this building. The sequence of operations as defined is part of the building’s routine function, system monitoring is carried out without difficulty and recording of measured performance data has been correct and readily accessible. This type of seamless operation is a measure of the success of all ZNE buildings and this one in particular.
Post Occupancy: HVAC and Commissioning
Natural ventilation and HVAC system operation have largely conformed to the design intent. Adjustments were made after occupancy on the operation of both HVAC and lighting for rooms that transition from unoccupied to occupied use. It was found that improved operation resulted by setting the classroom spaces to manual-on control rather than occupancy-sensed auto-off
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Zero Net Energy Case Study Buildings: Volume 2