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Offering HVAC Sealant vs. Replacement Helps Recession-Squeezed Customers
While many contractors are still hesitant to try refrigerant sealants, Brothers Air, Heat & Plumbing trained its service techs not only in proper application, but also how to market sealants to customers with leaking equipment. When the recession hit hard, Brothers policy of using sealants positioned them to not only retain customers, but add to profitability.
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Combined Heat and Power Helps Frito-Lay Facility Get Off the Grid
The Frito-Lay plant in Killingly, Conn., has installed a combined heat and power (CHP) system designed to help remove it from the Northeast power grid. Located in a region with severe electrical transmission constraints, Frito-Lay saw CHP as a potential opportunity for achieving near-term energy efficiency improvements and reducing emissions.
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Save Energy Now With Intelligent Industrial Buildings
The U.S. Department of Energy (DOE) notes that industrial buildings employ energy-intensive systems to heat, ventilate, air condition, light, and otherwise support processes and personnel. These industrial facilities present a unique opportunity to save energy by recovering energy and/or water from industrial processes.
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Acoustical Considerations for Large Rooftop Units
The convenience of rooftop packaged units has driven a demand for increasingly larger units. With these larger units, many factors need to be considered in the design of the building, such as increased structural support. Unfortunately, the increased sound levels produced by these units are sometimes overlooked.
by Dave Guckelberger and Jeanne Harshaw
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Remote Monitoring Solution Aids Isolated Alaskan School District
Barix AG, a supplier of IP-based control and
monitoring solutions, is providing Lake and Peninsula School District in
southwest Alaska with its Barix Barionet IP control and automation devices to
remotely monitor the HVAC, electrical, and other critical building systems at
14 schools across a remote, 400-square-mile section of the state.
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Consultant Says Europeans Lead in Green Building Practices
Where should you look for the best examples of large-scale, energy-efficient green building today? Not the United States. Instead the greenest new buildings on the planet are located in Europe. “The Europeans are now the leaders,” stated American green building consultant Jerry Yudelson.
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Insulation Provides Same Capabilities With Five Times Less Material
Imagine a lightweight, flexible material that effectively insulates pipes in steam distribution systems. You don’t have to imagine anymore. With DOE assistance, Aspen Aerogels developed insulation that provides the same insulating capabilities as conventional products, but with up to five times less material.
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An Energy Modeling Analysis of Warehouse Heating Systems
Space heating and lighting consume most of the energy in non-refrigerated warehouses. Installing more efficient lighting to save energy has been well documented by computer modeling. But what about space heating? This article summarizes an energy modeling analysis showing energy performance for six types of gas-fired heating systems commonly used in warehouses.
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Eliminate Voltage Unbalance
Voltage unbalance degrades performance and shortens the life of a three-phase motor. It causes phase current unbalance far out of proportion to the voltage unbalance. Unbalanced currents lead to torque pulsations, increased vibrations and mechanical stresses, increased losses, and motor overheating, which results in a shorter winding insulation life.
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Is Solar Growing? Survey Respondents Say Yes
To find out readers’ opinions about where solar products stand in today’s market, a brief, informal online survey was conducted on The NEWS Website. Survey respondents in this case do feel solar is taking hold in the residential sector.
by Greg Mazurkiewicz
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Investigating Residential Humidity Complaints
Scenario: Single stage residential
cooling equipment. Homeowner complains that humidity is too high at their
desired thermostat setting. Actions: You think this is too easy. Probably a system-related
problem (dirty filter, low charge, dirty condenser; the usual stuff). But you
also realize that it’s been a little cooler than most summers.
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Optimizing Dedicated Outdoor Air Systems
Outdoor air brought into a building can be expensive to temper and, if not properly conditioned, can cause humidity problems for the building. Designers are increasingly finding that using dedicated outdoor air systems (DOAS) allows them to comply with ASHRAE 62.1 with an energy efficient and easily verifiable design.
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Combined Heat and Power: A Clean, Local Energy Solution
The U.S. Department of Energy’s (DOE’s) Industrial Technologies Program (ITP) has identified combined heat and power (CHP) as one of the most important opportunities available today for increasing energy efficiency and reducing emissions. This article explains CHP technology uses and benefits.
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Focused Cooling Using Cold Aisle Containment
As heat densities and cooling costs rise, data center professionals are looking for more efficient cooling solutions. A cold aisle containment retrofit can be implemented easily and quickly, carries a payback time from weeks to a few months, and can reduce cooling related energy costs by as much as 30 percent.
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Optimizing Fleet Maintenance With Wireless Vehicle Management
Unfortunately, many fleets simply take a reactive approach to vehicle maintenance. In a widely distributed fleet, that could mean costly repairs, not to mention vehicle downtime. Fleet managers need to be able to monitor and collect data on the “health” of their vehicles to fix problems early and reduce costs.
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Study Highlights U.S.-Ready European Green Building Technologies
The
Mechanical Contractors Education and Research Foundation recently released a
new study that describes green building technologies being
implemented in Europe that could be used in the United States, especially
chilled beams and active or dynamic façades.
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Geothermal System Cuts Gas, Electric Usage for Athletic Center
The St.
Cloud (Minn.) Municipal Athletic Center (MAC) found a way to go green and save
taxpayer dollars in the process. With the installation of a new GeoExchange
system, the MAC is using the earth to maintain the arena ice and heat the
facility, saving electricity and gas as well as reducing greenhouse gas
emissions.
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The Perfect Technology Storm
The previously distinct systems within buildings are converging on standard platforms, applications, and infrastructures. And the synergy created by that convergence is translating into lower construction costs along with increased efficiencies in operations and energy usage.
by James F. Dagley
Terry W. Hoffmann
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Combined Heat and Power Basics
Combined heat and power (CHP), also
known as cogeneration, is the simultaneous production of electricity and heat
from a single fuel source.
CHP is not a single technology, but an
integrated energy system that can be modified depending upon the needs of the
energy end user.
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How to Avoid IT Equipment Overheating — in Winter
Many businesses face a new challenge that may take them by surprise: Keeping the heat-sensitive IT equipment in their server or telecom closet cool during cold-weather months, when the building is heated. The equipment is susceptible to malfunctioning or damage due to overheating, so keeping it cool is essential.
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How a DDC System Operates
Every manufacturer of an HVAC digital control system uses the DDC to perform pretty much the same functions. The catch is that each DDC system has different ways of letting you use these functions. If you are used to operating computers, you have the basic knowledge required.
by Leo A. Meyer
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The Benefits of Clean Air
Exposure to fine particles impairs breathing and increases the risk of serious illness. So, what is the best way for a person to reduce their exposure to fine particles of outdoor origin? The answer is to lower the concentrations of these fine particles that seep from the outside into the indoor air of their home.
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Replace V-Belts With Cogged or Synchronous Belt Drives
About one-third of the electric motors in the industrial and commercial sectors use belt drives. Belt drives provide flexibility in the positioning of the motor relative to the load. However, certain types of belts are more efficient than others, offering potential energy cost savings.
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The Importance of Benchmarking
Whenever the seasons change and your work changes from cooling to heating or vice versa, take a minute to review which of your measurement practices result in the greatest payback. On the technical side, surely one of the very best practices is benchmarking.
by Bill Dove, CM
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