Industry News




 

06/19/2013

Smart Sensor Options for HVAC

 
Fine-tuning your building automation system can help an oversized HVAC setup run more efficiently.

Roughly one-third of all commercial HVAC units are too big for the spaces they serve, says Jeff Riordan, director of business development for Irisys, a developer of thermal imaging and people-counting technology. This often results in excessive energy costs that seriously impact a building’s bottom line financial performance.

Higher-than-needed energy expenditures may be passed along as inflated tenant fees or increased costs for products and services, which make businesses less competitive – particularly when those dollars could be invested in research, development, new staff or revenue-growing initiatives.

Strategic energy optimization methods, however, can transition an oversized HVAC system into a more “right-sized” system that adjusts to dynamic occupancy levels that fluctuate during the day or week, Riordan says. These methods help lower operational costs which can be reallocated to other areas.

While building automation solutions already exist, the addition of a smart sensor can be a key component in making some of these solutions even smarter, Riordan says. Increasingly popular HVAC optimization strategies include:

Building Automation Systems
A building automation system (BAS) not only puts the building operator in greater control of the facility’s temperature and comfort, but also allows the operator to track inefficient energy expenditures. 

Not just limited to monitoring and adjusting temperatures, a BAS also measures ambient light, occupancy levels, indoor air quality and humidity to fine-tune its program and control lighting circuits, comfort setpoints, fresh air and energy usage more effectively. 

For example, if the BAS detects no one is occupying a certain zone, it may adjust accordingly, even if the standard program dictates otherwise. A BAS used throughout a particular building, over time, may actually learn occupant habits. It will then create a program to meet energy needs in the most efficient way possible.

Variable Speed Motors
A single-speed fan motor runs at one level: its highest.  More than 95 percent of all HVAC systems in the United States use single-speed fan motors.  Variable speed motors, however, give more flexibility in heating and cooling because, as the name implies, they run fans at varying speeds – not just the maximum speed. 

Modest changes in airflow result in significant energy savings, according to the fan affinity law from physics. For example, when the speed of a fan motor is decreased 20 percent, the air flow also decreases 20 percent, but actual energy usage drops 50 percent. The resulting energy consumption is lower – as are the building’s energy expenditures.

Adding variable frequency drive units to existing single speed blower fans – and adjusting the speed of fans based on levels of occupancy – may make it possible to generate even better energy savings.

Demand Controlled Ventilation
Not all areas of a building are created equally. Some parts may flurry with activity at one time of the day and be virtually unoccupied during others – meaning money is being wasted when an HVAC uniformly heats or cools a building that doesn’t have uniform occupancy and usage.

That’s where demand controlled ventilation systems step in.  Demand controlled ventilation (DCV) is a ventilation system feature that automatically drops outdoor air intake below the building’s original design rates, so energy usage decreases when space occupancy levels drop below design-based occupancy.

Traditionally, measuring space carbon dioxide has been the most common method of determining occupancy.  Unfortunately, the delay in getting accurate counts when using carbon dioxide sensors may cause the control system to react too slowly to match true occupancy level needs.  The preferred method of managing DCV is to use people counters that more accurately determine occupancy levels.

 

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Rent or buy spot coolers from full-service locations nationwide. On call “24/7”. Primary, supplemental or emergency cooling. Atlas Sales & Rentals, Inc., or call (800) 972-6600.

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Visit our website today to learn about the design flexibility of a Morton building and the endless possibilities of partnering with our designBUILD team.


Wood construction is both cost and energy efficient. Check out Morton Buildings and our designBUILD team online today to discover all the benefits of post-frame construction.


When choosing a metal-clad building for your next construction project, consider Morton Buildings, Inc., and their designBUILD team, we’ll make your dream a reality.

Bluebeam® Revu® simplifies digital facilities document management from design review to leveraging as-builts, maintenance manuals and O&Ms submittals.

Yaskawa drives offer quality performance for air handlers and cooling towers on the roof to secondary chilled water pumps in the basement

We Can Help You Reduce Energy by 30%

Our mission is to help our customers manage their buildings' energy costs, improve reliability, and enhance performance while having a positive impact on the environment.
CLICK HERE to find out how.

Need portable cooling?

Rent or buy spot coolers from full-service locations nationwide. On call “24/7”. Primary, supplemental or emergency cooling. Atlas Sales & Rentals, Inc., or call (800) 972-6600.

Click here for more info


Visit our website today to learn about the design flexibility of a Morton building and the endless possibilities of partnering with our designBUILD team.


Wood construction is both cost and energy efficient. Check out Morton Buildings and our designBUILD team online today to discover all the benefits of post-frame construction.


When choosing a metal-clad building for your next construction project, consider Morton Buildings, Inc., and their designBUILD team, we’ll make your dream a reality.

Bluebeam® Revu® simplifies digital facilities document management from design review to leveraging as-builts, maintenance manuals and O&Ms submittals.

Yaskawa drives offer quality performance for air handlers and cooling towers on the roof to secondary chilled water pumps in the basement

We Can Help You Reduce Energy by 30%

Our mission is to help our customers manage their buildings' energy costs, improve reliability, and enhance performance while having a positive impact on the environment.
CLICK HERE to find out how.


 
08/21/2014

The Department of Energy has released two reports which indicate wind turbine installations and efficiency is growing while prices drop. 

08/20/2014

The NHL has partnered with the NRDC to release their first sustainability report. 

08/19/2014

A new battery has been developed that is free of toxic materials and longer lasting than its more expensive competitors.

08/14/2014

A new study shows that emergency communications that don't specify the threat could be doing more harm than good.

08/13/2014

Natural light's benefits to workers extend far beyond the workday.

08/12/2014

Will a "Little Box" change the future of electricity?

08/07/2014

Could your building withstand an F3 tornado repeatedly?

08/06/2014

Make sure your conference room is properly outfitted with a projection system that meets your occupants' needs.

08/04/2014

The update to the Building Energy Quotient program includes more building types and a new methodology to measure "In Operation" buildings.

07/31/2014

Improper lockdown security may leave your building and occupants vulnerable

07/29/2014

Is the American energy policy lagging behind the rest of the world?

07/22/2014

How to keep building occupants safe during the hot season.

07/21/2014

Spaces grow denser as the industry emerges from a slump.

07/18/2014

Study ranks states on fuel and consumption.

07/16/2014

Enhance cleaning practices at your educational facilities.

07/11/2014

Tenants have low tolerance for even one pest sighting, a new survey reveals.

07/10/2014

Battery installations will fuel federal research.

07/03/2014

An ongoing pilot program targets carbon neutrality.

06/27/2014

Potential substitute chemicals boast a low global warming potential.

06/26/2014

Tap into the DOE’s new data stream for renewable energy.

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