The Importance of Measuring Air Pressure in Commercial Buildings

    Posted on Tue,Mar 26, 2019 @ 12:29 PM
    This article explains why and how to measure air pressure in commercial buildings ensuring occupant comfort and building efficiency. Topics covered include:
    • Air pressure and how it affects commercial buildings
    • Effects of not managing building air pressure correctly
    • How to control the air pressure
    • Measuring pressure
    • Calibration
    • Installation advice and setpoints

    Air pressure is the weight of air molecules pressing down onto the earth and objects. (refer to Figure 1). For instance, cool air molecules are heavier and denser causing the force applied to a structure to be greater while warm air molecules are lighter and have lesser force on the building. There are other complicating factors such as wind, weather and seasonal changes, which will also produce variations in pressure.

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    Tags: Sensors

    Exploring the Internet of Things

    Posted on Mon,Mar 11, 2019 @ 03:00 PM

    One of the most prominent buzz terms in the HVAC market is the Internet of Things referred to as IoT. IoT is a digital network of physical devices, vehicles, buildings and many other items. These connected smart devices use electronics, software, and network connectivity to collect and exchange data. In simple terms, the Internet of Things are products or devices that talk to each other.

    If you have a smartphone that communicates with a thermostat, able to checked on a buildings system operation parameters remotely, or used the location services function on your smartphone, you have used IoT. These applications are just a small sampling of IoT and the value that it brings to people’s lives.

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    Tags: Actuators

    The University of Quebec Decreased Energy Consumption by a Third

    Posted on Tue,Jan 29, 2019 @ 11:16 AM

    The Université du Québec à Montréal (UQAM) is a dynamic, open, creative university recognized for the originality and quality of its programs, cutting-edge research, grounded social concerns, and its innovation in the arts. This City campus is bustling with students all year round, who wish to study in a comfortable and inspiring environment. If that comfort is disrupted, their ability to learn decreases.

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    Tags: Green Building Technology, Featured Case Studies

    Belimo Highlights at AHR Expo

    Posted on Mon,Jan 21, 2019 @ 04:59 PM

    AHR Expo in Atlanta was a huge success. It attracted the most significant amount of industry professionals from around the globe. The show provided a unique forum for manufacturers of all sizes to share ideas and to display the future HVACR technology solutions. Belimo’s booth this year illustrated how our small products (actuators, valves, sensors) make a big impact on water and air applications.

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    Tags: Belimo News

    Sensors are the Foundation for Occupant Comfort

    Posted on Tue,Nov 27, 2018 @ 04:35 PM

    In HVAC systems, sensors measure controlled variables of temperature, humidity, pressure, and air quality.  Sensor inputs connect to the Direct Digital Control (DDC) system and network to the Building Automation System (BAS).  High quality sensors are the foundation for ensuring occupant health and comfort and are essential for energy efficiency within buildings.  

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    Tags: Belimo News, Sensors

    Ease of Installation and Fast Commissioning

    Posted on Tue,Nov 20, 2018 @ 11:16 AM

    The Belimo Assistant App offers operation transparency when used in connection with Belimo VAV, damper and valve actuators that have integrated Near Field Communication. With a smartphone, the Belimo Assistant App provides fast and easy programming, commissioning and troubleshooting even without power. The App also allows you to document and send your settings and operating data via email.

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    Tags: Online Learning Resources & Tools, Belimo News

    Pressure Sensors Optimize Building Performance

    Posted on Mon,Nov 05, 2018 @ 12:44 PM

    HVAC system performance and comfort rely on accurate measurement and control of differential pressure.  Effective air distribution is achieved by closely monitoring and controlling air pressure.  By monitoring the airflow pressure across dampers, filters, fans, and between rooms, the HVAC system can efficiently and economically optimize building performance and reduce energy consumption.

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    Tags: Belimo News, Technical Tips, Sensors

    Pressure Independent Valves a Good Solution for Water Source Heat Pump Application

    Posted on Thu,Oct 18, 2018 @ 09:00 AM

    In a water source heat pump (WSHP) application, a variable or constant speed pump accomplishes water distribution. The primary function of valves in a WSHP application is to allow a predetermined volume of water to enter each unit through either a water-to-refrigerant coil, water-to-air coil, or a water-to-water coil. The valves used are typically on/off control for full design flow when the WSHP starts. In most applications they are not required to control the amount of flow as in a traditional HVAC hydronic system.

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    Tags: Pressure Independent Valves, Belimo News, Technical Tips

    Critical Zone Reset Logic Increases Pumping Efficiency

    Posted on Thu,Oct 04, 2018 @ 08:47 AM

    Hydronic variable flow systems may reset supply water temperature, pump static pressure, or a combination of both to reduce plant energy consumption and to comply with building codes and standards. The information below illustrates how valve position feedback to the Building Automation System (BAS) is used to reset the pump pressure setpoint in accordance with ASHRAE 90.1 and California Title 24.

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    Tags: Pressure Independent Valves, Technical Tips

    District Cooling and the Effects of Low Delta T

    Posted on Mon,Mar 05, 2018 @ 09:36 AM

    District cooling is the centralized production and distribution of cooling energy. Chilled water is delivered from a centralized energy plant through an underground pipeline to commercial, industrial, and residential buildings to air-condition using chilled water.  Excess heat is extracted from the building by the air conditioning systems’ heat exchangers. The water is then returned to the central energy plant.

    District cooling plants operate to meet the cooling energy demand of their customers, which could be dozens of buildings in a college campus or municipality. District cooling systems offer lower up-front construction costs and eliminate the need for chiller plant maintenance at the building level.

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    Tags: Online Learning Resources & Tools, Pressure Independent Valves, Technical Tips