Providence Cardiovascular Lab Setback Analysis

Analysis: Energy model and Energy Trust of Oregon (ETO) Technical Analysis Report. Analysis for occupancy-based airflow setback in five cardiovascular laboratories served by a recirculating VAV air handler with hydronic reheat.

• OpenStudio / EnergyPlus model of the cardiovascular laboratory suite and air handling system, including economizer, preheat, humidification, dehumidification, and VAV reheat controls

• Determination of minimum unoccupied air change rates from room air change certification to maintain ASHRAE 170 positive pressure relationships

• Development of occupancy schedules based on lab procedure windows, with setback during nights, weekends, and holidays

• Evaluation of first cost and simple payback for:

• Implement occupancy-scheduled VAV minimum airflow setback, reducing supply air from 15-23 ACH occupied to 6-10 ACH unoccupied