Tags: Belimo News
Tags: Belimo News
Those seeking comfort will find it at Assisi Heights in Rochester, Minnesota. For many years, that wasn’t the case. The Sisters of St. Francis of Rochester and others who lived, worked, and taught at the historical convent, did so without air conditioning and a very outdated steam heating system. Many of the pneumatic actuators throughout the steam system were in disrepair.
Tags: Featured Case Studies
Indoor air quality (IAQ) and its effect on occupant well-being and comfort are essential. Many issues such as sick building syndrome, indoor air quality thermal comfort, visual comfort, and acoustic comfort are a part of the indoor environment. Good indoor air quality requires attention to the building's HVAC system, measure and monitoring, healthy indoor air, air filtration, and pollutant source management. Some good practices in these areas have also been highlighted.
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.
Airside Economizing is a great way to reduce operating costs; it also provides the correct ratio of outside air and return air to deliver the proper indoor air quality (IAQ) to meet the codes and provide occupant comfort. Many commercial building owners are paying too much for utility bills and are looking at ways to cut costs. HVAC economizer can make a difference in energy costs.
On average, we spend approximately 90% of our lives indoors and take about 20,000 breaths a day. We assume the air is "clean" in the buildings and will not affect our health. It is surprising how little we know about the importance of indoor air quality.
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.