Filters
Topic: Cooling 
(remove) Content type: Analysis (remove) Service line: Energy Market Advisory (remove) Results
NEW!
Refrigerant Oil Additives, Revisited
June 6, 2013
New information on refrigerant oil additives for air-conditioning and refrigeration systems show some ability to improve one component of a system’s efficiency. We are still not persuaded that they provide a cost-effective solution, although continuing research may change our minds.
Content type: Focus Report | Document ID: TAS-F-6 | Author: Jay Stein, Peter Criscione
NEW!
If the Fan Belt Breaks on the Rooftop, Does Anybody Hear It?
May 22, 2013
A number of new technologies offer the potential to gain greater efficiencies from existing rooftop air-conditioning units. These technologies—which include such functionality as fault detection, diagnostics, and demand-controlled ventilation—are proving promising in early trials.
Content type: Tech Brief | Document ID: TAS-TB-5 | Author: Peter Criscione
Top 20 Technologies and Trends of 2012
December 26, 2012
It’s been a remarkable year for efficiency technologies. The E Source Tech Team takes a look back at what we consider the biggest game-changers of 2012.
Content type: Focus Report | Document ID: TAS-F-4 | Author: Bryan Jungers, Ira Krepchin, Peter Criscione, Mary Horsey, Lee Hamilton, Essie Snell, Jay Stein, Spencer Sator
Results for RTU Retrofit Technologies Continue to Be Positive
December 20, 2012
The latest body of research supports previous indications that devices that convert constant-speed rooftop units (RTUs) to variable-speed operation and enable a mix of energy-saving control strategies can provide energy savings of as much as 50 percent for single-zone RTUs.
Content type: Research Brief | Document ID: TAS-RB-60 | Author: Peter Criscione
Summer Energy-Saving Tips for Residential Customers
July 30, 2012
Do you have a list of energy-saving tips for the summer that we can share with our residential customers?
Content type: Ask E Source | Document ID: TAS-AskES-60 | Author: Lee Hamilton, Spencer Sator
Saving Energy with Shade Trees
July 26, 2012
What's the energy impact of planting shade trees around homes?
Content type: Ask E Source | Document ID: TAS-AskES-59 | Author: Essie Snell
Waste Not, Pay Not: Energy Recovery Ventilation
March 21, 2012
Proper ventilation is essential for maintaining good indoor air quality, yet it places an additional burden on heating and cooling equipment, which must condition air that will soon be exhausted from the building. Fortunately, energy recovery ventilation systems can help ameliorate this problem.
Content type: Research Brief | Document ID: TAS-RB-41 | Author: Essie Snell
Hybrid Ground-Source Heat Pumps
March 20, 2012
Ground-source heat pumps are often prohibitively expensive because they're sized to meet the peak heating or cooling loads for commercial buildings. This video Tech Brief explains how hybrid models downsize the ground heat exchanger and use small supplemental cooling towers or boilers to meet peak load. ...
Content type: Tech Brief | Document ID: EMN-TB-1 | Author: Mary Horsey
Heat Pump Water Heaters: They’re Baaack!
January 26, 2012
Residential heat pump water heaters are in the midst of a significant resurgence and have the potential to save consumers substantial amounts of energy if they are installed and used correctly.
Content type: Research Brief | Document ID: TAS-RB-53 | Author: Essie Snell
A Dramatic Boost for Existing RTUs
September 23, 2011
Several new retrofit devices are available for single-zone rooftop-unit air conditioners, with at least one device demonstrating demand savings of 41 percent and annual energy savings of 52 percent. These devices can also monitor unit performance, enabling additional savings.
Content type: Research Brief | Document ID: TAS-RB-47 | Author: Peter Criscione
Finding Chiller Ratings
April 13, 2011
How can I get certified performance data for a specific chiller?
Content type: Ask E Source | Document ID: TAS-AskES-41 | Author: Peter Criscione
New Doors Are Opening for Widespread Economizer Cooling in Data Centers
January 19, 2011
A recent analysis of data center operation by a leading engineer is challenging the widely accepted belief that data centers need tight temperature and humidity control. The study concludes that loosening these controls could translate into as much as a 63 percent savings in cooling energy.
Content type: Research Brief | Document ID: TAS-RB-27 | Author: Peter Criscione
Finding the Efficiency of Old Air-Conditioning Equipment
January 14, 2011
How can I determine the efficiency of old air-conditioning equipment?
Content type: Ask E Source | Document ID: TAS-AskES-36 | Author: Peter Criscione
Get the Duct Out of the Attic!
January 12, 2011
A recent analysis indicates that in cooling-dominated climates, relocating ducts to conditioned spaces can be one of the most effective efficiency measures for residential new construction, whether you’re focused on economics or the overall level of energy savings.
Content type: Research Brief | Document ID: TAS-RB-26 | Author: Essie Snell
Beware Dubious Savings Claims for Desiccant Dehumidification Panels
January 12, 2011
Do desiccant dehumidification filters really cut air-conditioning and refrigeration costs? Are the savings claims valid for “drop-in” media that are not continuously regenerated?
Content type: Ask E Source | Document ID: TAS-AskES-27 | Author: Leland Keller
A Short History of Air-Conditioner and Heat Pump Standards
November 30, 2010
How have the minimum efficiency requirements for air-cooled packaged air conditioners and heat pumps changed over time?
Content type: Ask E Source | Document ID: TAS-AskES-34 | Author: Peter Criscione
To Save or Not to Save: The Air-Conditioner Maintenance Debate Continues
October 5, 2010
Several new research efforts into the efficacy of air-conditioner maintenance programs are underway in response to the concerns of California utilities and regulators that these programs aren’t delivering expected savings.
Content type: Research Brief | Document ID: TAS-RB-20 | Author: Peter Criscione
Study Finally Evaluates an Evaporative Precooler Retrofit, with Mixed Results
August 2, 2010
Results are in from the first field testing of retrofits of evaporative precoolers and they are mixed but promising!
Content type: Research Brief | Document ID: TAS-RB-15 | Author: Mary Horsey
Do Ground Source Heat Pumps Cause Your Lights to Flicker?
June 2, 2010
Sometimes the lights flicker when a ground source heat pump starts up. What causes this, and what can be done about it?
Content type: Ask E Source | Document ID: CEMC-AskES-1 | Author: Micah Allen
Chilled-Beam Cooling Offers HVAC Savings
June 26, 2009
How does chilled-beam cooling technology work, and what are its benefits?
Content type: Ask E Source | Document ID: TAS-TN-7-09d | Author: Mary Horsey
PTAC Efficiency Specifications
March 1, 2009
What are the latest U.S. Department of Energy standards for packaged terminal air conditioners and heat pumps (PTACs and PTHPs), and are there any efficiency recommendations that go above the standards?
Content type: Ask E Source | Document ID: TAS-TN-3-09c | Author: Peter Criscione
Savings from Ductless Split Systems
November 1, 2007
What potential for savings do ductless split systems offer compared to unitary air conditioners?
Content type: Ask E Source | Document ID: TAS-TN-11-07c | Author: Peter Criscione
