Optimum Energy is a member of the U.S. Green Building Council and specialists in data-driven HVAC energy optimization for campuses and extensive facilities. A pilot project was undertaken at the headquarters of one of Optimum Energy's Fortune 100 clients. The purpose was to test the impact of the award-winning Belimo Energy Valve on long-term sustainability by combatting HVAC system problems associated with low Delta-T.
Pressure independent control valves (PIV) stabilize variable flow hydronic systems for a lifetime of efficiency and worry-free dynamic balancing. PIVs directly control the water flow required by the coil or a branch and are not affected by pressure fluctuations in the system. The valves are selected based on the flow requirements of the coil or branch, and no Cv calculations are needed. By precisely controlling the flow, the pressure independent valves eliminate the need for balancing valves, thus reducing installation costs. The most significant benefit comes in energy savings by eliminating overflow through the coil or branch. Overflow wastes pumping energy and is the leading cause of low Delta T syndrome in chilled water systems. With Belimo's pressure independent valves, every system performs to its full potential – saving time, money, and other precious resources.
ASHRAE’s newly renovated global headquarters in Peachtree Corners, Ga., will showcase the latest HVAC equipment and technology offered by Belimo. The building includes design and renovation updates to achieve a net-zero energy-efficient workplace environment.
Motorized valves control and adjust water flow in a hydronic heating and cooling system. The flow through pressure dependent valves varies as the pressure (∆P) across the valve orifice changes. Typical pressure dependent valves include globe valves, zone valves, characterized control valves, standard ball valves, and butterfly valves. When pressure varies in a system, the flow will have an identical response. As the pressure drop decreases across a pressure dependent control valve, flow decreases, starving the coil or branch. When pressure drop increases across a pressure dependent control valve, flow increases, flooding the coil or branch. Overflowing the coil usually causes what we call low Delta T syndrome. This syndrome typically increases the energy consumption of chilled water pumps, decreases system overall operating efficiency, undermines occupant comfort, and increases overall operation cost.
For nearly four decades, the Dunn Building in Berkeley County, West Virginia, operated as a woolen sock mill. Since then, it has been used for various purposes, including a shopping center and technical college. Today, it serves as administrative offices for Berkeley County.
Belimo’s ZoneTight zone valve is designed for maximum efficiency in tight spaces and sets performance standards for pressure dependent and pressure independent zoning applications. The QCV and PIQCV provide 95% less power consumption than conventional zone valves. The zone valve series easily connects to the actuator allowing operators and technicians to install valves quickly without tools, helping to reduce labor costs.
Western University in London, Ontario, is widely regarded as one of Canada's premier collegiate institutions with an on-campus population to approximately 40,000 students, faculty, and staff. The main campus comprises 481 hectares [1189 acres] of Gothic-style buildings and a mix of state-of-the-art, LEED-certified structures. With overall utility costs averaging CAD 20 million, Western's facilities team devotes considerable time and resources to improve energy efficiency and sustainability.