Technical

Improving Supermarket Operations Through Desiccant Dehumidification

December 20, 2010
Desiccant dehumidification is a cost-effective and energy efficient option to reduce a supermarkets’ moisture load to lower energy costs, ensure food safety and customer comfort, and provide the proper amount of fresh outdoor air at the precise temperature and humidity necessary for the space.
Read More

Basic Thermodynamics for Refrigeration and Air Conditioning - Part 2

December 6, 2010
A basic HVAC system shows the application of the Second Law of Thermodynamics. The compressor adds energy to the refrigerant, and it becomes hot, just the way a hand operated tire pump does. Since the compressed refrigerant is hotter than the air blowing across the condenser, the heat will flow to the cooler air. This is a transfer of heat energy out of the refrigerant.
Read More

Basic Thermodynamics for Refrigeration and Air Conditioning - Part 1

November 22, 2010
Thermodynamics, as with most concepts in science and physics, is most accurately described using mathematical equations. However, simple explanations, although not perfectly accurate, are sufficient to convey the information needed to understand everyday experiences. This article is an attempt to simplify these concepts.
Read More

Passive Solar Technology Provides Free Pre-Heated Ventilation Air

November 8, 2010
Transpired solar air collector technology, developed at the U.S. Department of Energy’s (DOE’s) National Renewable Energy Laboratory (NREL) back in the 1990s, recently found its way back home and is now an integral part of the comfort heating system of the new Research Support Facility (RSF).
Read More

Do Notched V-Belts Wear Sheaves Faster Than Wrapped Belts?

October 18, 2010
People sometimes ask if there are wear differences due to the raw edge design of the notched V-belt vs. the fabric all over design of the classical wrapped V-belt. The fact is many factors can contribute to sheave wear. However, notched V-belts and wrapped V-belts have virtually identical sheave wear characteristics.
Read More

Achieving Safer, High-Quality Brazing

October 4, 2010
It is possible to ensure high-quality brazing connections in a safe and environmentally friendly way? Yes it is, with mixed oxyhydrogen gas generators. This technology works only with water and electricity. Gas is generated through a particular electrolytic cell, able to get H2-O2 from the water.
Read More

Emerging Technology: Liquid Desiccant Air Conditioners

September 20, 2010
Ongoing economic and indoor environmental concerns require HVAC innovation. New liquid desiccant air conditioning systems offer substantial energy savings and greatly improved humidity control in applications where latent loads (moisture) are very high relative to sensible loads.
Read More

Moisture in Building Envelopes

September 6, 2010
Moisture in building envelopes can have serious consequences. For example, moisture in insulation reduces its insulating capability, causing heating and/or cooling losses and wasting energy. Moisture can also cause structural deterioration and foster mold growth. Thermal imaging is well suited to identifying wet spots.
Read More

Emerging Technology: Automated Fault Detection and Diagnostics for Rooftop Units

August 23, 2010
Smart HVAC equipment that recognizes when it is failing or has failed, or when conditions have drifted outside its optimum range, could save substantial amounts of energy if the equipment sent useful information to the building owner or contractor. This is referred to as automated fault detection and diagnostics (FDD).
Read More

Explaining Synchronous Drives: Are They Intended for HVAC Applications?

August 9, 2010
While synchronous drives do have many industrial applications, they are generally not accepted as the best option for HVAC equipment. Virtually no OEM uses or recommends synchronous drives due to cost, noise and vibration, structural design concerns, and reliable availability of replacement components.
Read More

Multimedia

Videos

Image Galleries

2014 MCAA Annual Convention

Scenes from the 2014 MCAA Annual Convention in Scottsdale, Ariz.

Podcasts

Kyle Gargaro, editor-in-chief of The NEWS, hosted the 2014 ACCA CEO Forum. At the event, six well-known, highly respected company executives, Gary Michel, Ingersoll Rand/Trane; Chris Nelson, Carrier Corp.; Chris Peel, Rheem Mfg. Co.; Rod Rushing, Johnson Controls; Brent Schroeder, Emerson Climate Technologies; and Doug Young, Lennox; provided individual industry outlooks and fielded questions directly from attending contractors. Listen to the entire event on the NEWSMakers podcast. Posted on April 14.

More Podcasts

THE MAGAZINE

ACHRNEWS

NEWS 04-14-14 cover

2014 April 14

Check out the weekly edition of The NEWS today!

Table Of Contents Subscribe

SERVICE CALLS POLL

Which statement on service calls best applies to your business?
View Results Poll Archive

HVACR INDUSTRY STORE

plumbing-hvac.gif
2014 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

More Products

Clear Seas Research

 

Clear Seas ResearchWith access to over one million professionals and more than 60 industry-specific publications, Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.

DON'T MISS A THING

Magazine image
 
Register today for complete access to ACHRNews.com. Get full access to the latest features, Extra Edition, and more.

STAY CONNECTED

facebook icontwitter iconyoutube iconLinkedIn i con