Brown Laboratory Energy Conservation Measures

The scope of work consisted of the renovation of approximately 33,000-square-feet of an existing facility to incorporate five energy conservation measures (ECMs) in tandem with contractor implementation and University review of ECM feasibility. The work related primarily to the HVAC and control systems with some electrical requirements. The five ECMs in the project scope included the following:

1. Developed an HVAC control strategy to modulate air handling unit fan speed based on feedback from the terminal VAV boxes. Sequences of operation were modified to implement this control strategy. The control sequences were also designed to maintain minimum pressure differential (0.6” wc) required by Phoenix air control valves through integration with the Building Automation System (BAS). Modifications and analysis were reviewed by University personnel to be implemented by University maintenance personnel and hired contractors.
2. Developed control sequences to reduce static pressure setpoints for laboratory building main exhaust fans (total of three fans) in the Brown Lab North wing. Setpoints were audited to determine optimal static pressure values for three exhaust fans. Design modifications were then made to convert existing constant volume exhaust systems into a variable airflow volume system. All modifications to the exhaust fans, electrical systems, and building controls were documented to be implemented by University maintenance personnel and hired contractors.
3. Designed all modifications needed to convert the operation of air handling unit AHU-5 from two-speed airflow control to full-range variable airflow. Documentation and audit of existing HVAC systems included physical modifications to the air handling unit, supporting electrical systems, and BAS controls.
4. Developed a control strategy to convert all constant volume laboratory exhaust and supply in the North Wing of Brown Laboratory into variable airflow volume.
5. Performed all calculations and analysis necessary to determine the correct airflow and space pressurization for each space in both wings of Brown Laboratory.