The Energy Cost Index (ECI) is the measurement of cost per square foot per year of conditioned space in a facility ($/ft²/year). The average ECI of electricity for an office building in the U.S. is about $1.73/ft²/yr according to the U.S. Energy Information Administration. What are you doing to reduce your ECI?Continue reading 5 Energy Conservation Measures with Quick Returns
This October, Computrols will begin broadcasting its very own podcast covering technology we find in today’s “smart buildings.” The conversations will expand far beyond just building automation as we aim to keep our listeners informed on all things digital in facilities management. The episodes will last approximately 30 minutes and will primarily be hosted by Scott Holstein, Compturols’ Marketing Manager. We’ll invite third-party and in-house subject matter experts to share their expertise and bring a new perspectives. If you have topic suggestions or would like to be featured on our podcast, please email us at firstname.lastname@example.org.
On March 21, 2018, Computrols Director of Research and Development, Mike Donlon, presented on the topic of “Optimal Virtual Metering In Building Automation” at the Globalcon Conference in Boston, MA. The below information is a transcribed excerpt from his session.
In one of our recent articles, we discussed static pressure control and variable air volume (VAV) systems. We mentioned that by modulating the leaving air temp from an air handling unit (AHU) we can promote energy efficiency while also having an effect on static pressure. This time, we’ll look into how AHU supply temp sets the stage for efficient VAV operations.
Typically, VAVs are equipped with a means of reheating the supply air provided by the corresponding AHU. Continue reading AHU Supply Temp Sets the Stage
Static pressure is a key ingredient in a successful Variable Air Volume (VAV) system. It ensures that air flow will be available to enable the VAVs in a system to achieve their designed Cubic Feet per Minute (CFM) at maximum demand. Simply put, the push of the air must be greater than the resistance to the flow or no air will circulate through the ducts. Typically the setpoint for static pressure is determined through the course of the testing, adjusting, and balancing (TAB) at the end of a job. Continue reading Static Pressure Control and VAV Operation
Energy and water conservation deliver a wide range of advantages, including cost-related benefits, ancillary savings, infrastructure improvements, reduced pollutant emissions, improved energy security, and, in some cases, increased productivity. Continue reading Energy Efficiency Measures for Winter
Buildings rarely perform as initially intended, resulting in energy use that is higher than anticipated. To resolve this inherent problem, retro-commissioning, performance contracting, and facility IoT analytics have all emerged to capture market share. In practice, energy efficiency in buildings is achieved through the balanced combination of design concepts, applied technologies, and operational strategies. These work together to reduce the consumption of energy. Continue reading Energy Analysis Solutions
Director of Research and Development, Computrols
The most common Cooling Tower Control System uses a fixed temperature setting for the condenser water supplied back to the chillers. For convenience, let’s label this temperature:
To control this value, most controls technicians would program a control loop (PID or similar) to vary the overall Cooling Tower Fan usage in order to maintain this temperature. In most large buildings, multiple Cooling Tower Fans are available for this purpose. Continue reading Cooling Tower Control Based on “Approach”