A recent study by Ceres — “Practicing Risk-Aware Electricity Regulation: What Every State Regulator Needs to Know” — concluded that the least cost and least risk for future energy resources is energy efficiency. Indeed, the lowest cost unit of energy is one that is not used.
All major manufacturers of three-phase ac induction motors offer “inverter-duty” or “inverter-ready” models, but while these motors have inverter-rated insulation to protect the windings, the bearings — their most vulnerable parts — are too often ignored.
Leading green building and sustainability consultant Jerry Yudelson has released his annual list of “Top 10 Megatrends” for the green building industry. Yudelson said, “It looks like a good year ahead for the green building industry.”
Heat is both a byproduct and one of the greatest enemies of electrical and electronic components. If not dissipated, this heat has the potential to cause early failures and malfunctions.
Hank’s Plumbing of Calgary, Alberta, Canada, replaced paper forms with mobile software from Flowfinity Wireless Inc., Vancouver, British Columbia, on its field technicians’ smartphones to gain significantly improved management of time and materials.
The problem of dirt collecting around ceiling diffusers has been a concern in the air distribution industry for a long time. Some people have asked about this dirt and the impact on indoor air quality (IAQ).
The desiccant-enhanced evaporative (DEVAP) air conditioner — developed by the National Renewable Energy Laboratory (NREL), AIL Research, and Synapse Product Development LLC — combines desiccant-based dehumidification with indirect evaporative cooling to reduce cooling energy use by as much as 81 percent.
The first two parts of this series dealt with the use of cast iron components in refrigeration equipment. This last part will focus on the construction of such components.
In the first part of this three-part series, we talked about the effect cold shortness has on the use of cast iron in refrigeration equipment. Now we will look at porosity and abrasion resistance.
Reducing refrigerant in direct expansion (DX) HVAC system designs is a trend both contractors and consulting engineers are using to distance themselves from the competition. While refrigerant reduction has been fairly common in conventional air conditioning, it’s only now emerging in the category of indoor pool (natatorium) dehumidification.