The Gas Technology Institute (GTI) has announced the opening of its Combined Heat and Power (CHP) & Renewable Energy Laboratory to provide greater capabilities for developing a wide variety of highly efficient renewable energy technologies such as solar thermal products.
Chilled beam systems provide savings by replacing fan energy with pump energy. They use pumped chilled water instead of blowing cold air. Water has much higher heat capacity, both by mass and volume. In typical pump and fan arrangements, this has been shown to translate into a reduction in fan energy by a factor of seven.
Bob and Btu Buddy get together for breakfast to discuss their last service call, which concerned a compressor that had liquid refrigerant flooding back to it. Bob had asked a couple of questions while they were leaving the job. Btu Buddy then proceeds to answer Bob’s questions.
When President Obama signed the Health Care and Education Reconciliation Act of 2010 into law, it brought months of bitter debate to an end. Regardless of how employers may feel about the two pieces of legislation that make up health care reform, most have been left to wonder: What exactly do we do now?
This time around our problem centers on a split-system air conditioner. The condensing unit is 240-volt, single-phase, and the indoor air handler (which our customer is able to tell us is “blowing warm air”) consists of a standard gas furnace and an A-coil housed above the furnace plenum.
How do I get my employees motivated? How do I get the phones to ring more? How do I keep busy all year long and avoid the slow seasons? How do I make more profitable sales? Just about every service contractor complains about one or more of these issues, but they all can be eliminated with very little effort.
Now that the nation is finally showing signs of emerging from the worst recession since the 1930s, the latest long-range seasonal forecast from the National Weather Service indicates HVAC contractors may get some relief from the cold, hard times of the last couple of years with a hotter than normal summer in much of the country.
This article, reprinted from an EXHAUSTO white paper, discusses the benefits of demand-controlled ventilation (DCV) systems in multi-story, multi-residential buildings, which include improving building energy efficiency, enhancing comfort and other key performance factors. It reviews the application of DCV in new, retrofit and renovated building projects.
This job is a three-story office building with an air handler on each floor with a refrigerant coil in each air handler. A 75-ton condensing unit serves the three 25-ton air coils. This is an old system that has still been doing a good job. The complaint is that the second floor unit is not holding the conditions that the thermostat is set for.
New York state homeowners now have an added incentive to install micro-combined heat and power (micro-CHP) systems. The New York State Public Service Commission approved tariff filings that pave the way for homeowners who install the systems to receive credit for excess electricity they generate and sell back to their utilities.
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