Efficiency Takes Off High efficiency and low noise were two of the primary drivers for successful Dorchester Hotel and Hilton Hotel chiller replacement projects. An estimated 30% energy cost savings are being realized by the use of GeoClima "Turbomisers" at these sites in the UK. Click here to read this case study. (PDF 530 KB) Note: This case study was developed by Service Engineer Magazine and is used with permission.

University Mechanical Contractors, Inc. Solves Major Problem for Seattle-Based Hi-Tech Company Facility management group Grubb & Ellis enlisted UMC's assistance in a retrofit project involving a 260 ton roof-top screw chiller for their high-profile client. Several operating concerns initiated the need for a replacement/upgrade, including inefficient energy use, vibration and noise issues, and high maintenance costs. UMC's custom-engineered retrofit solution with three 80 ton Turbocor compressors provided improvements in operation efficiencies that resulted in dramatic savings in utility and maintenance costs. Click here to read this case study. (PDF 508 KB)

Flagler College Uses Two Chillers For Superior Performance A young college in an old town chose Danfoss Turbocor technology to help solve energy, humidity, and noise problems during recent building renovations. Flagler College in St. Augustine, Florida combined a chiller from McQuay International (a large Danfoss Turbocor customer) with mechanical services by a W. W. Gay Mechanical Contractors (a Danfoss Turbocor network contractor, Jacksonville, Florida) to provide cooling at a primary classroom building. This first chiller so impressed the owner that they opted to buy a second one for an art building renovation. Click here to read this case study. (PDF 409 KB) Note: This case study was developed by Engineered Systems Magazine and is used with permission.

New Compressor Technology Retrofit for Operating Engineers Trust Fund Building The Operating Engineers Pension Trust, Local 12 out of Pasadena, CA, was looking for efficiency improvements for their HVAC system. They became particularly interested in refrigeration compressor improvements and installed two new low-friction, oil-free refrigeration compressors developed by Danfoss Turbocor. The newly installed Turbocor compressors have opened the door to additional cooling savings, predicted to be as high as 50 to 70 percent vs. their older compressors. Click here to read this case study. (PDF 192 KB)

San Diego County Facility Chooses Danfoss Turbocor Oil-Free Compressor Technology San Diego County’s Juvenile Hall, a complex of three buildings totaling approximately 250,000 square feet, was having real problems with their chillers, both from the standpoint of efficiency and staying on the line. As a result of a recent facility upgrade, the existing chiller compressors were replaced with Danfoss Turbocor oil-free centrifugal units, dramatically improving operating efficiency. Click here to read this case study. (PDF 184 KB)

Retrofitting a Water-Cooled Chiller with Turbocor’s Newest Oil-Less Compressor The County of San Diego is always looking for ways to reduce electrical usage and demand, and was interested in retrofitting the HVAC system of its Juvenile Hall Complex. Noticing the inefficient operation of the two old chillers and documenting the various operating problems, the San Diego Regional Energy Office convinced the county to retrofit both machines with oil-less centrifugal compressors from Danfoss Turbocor. Click here to read this case study. (PDF 262 KB)

Retrofit of an Air-Cooled Chiller with an Oil-Less Centrifugal Compressor The County of San Diego's East County Family Resource Center is a 22,000 sq ft office facility served by one 88-ton York air-cooled chiller (230 Volt, R-22) with two reciprocating compressors. The chiller had been riddled with problems since installation: compressor failures, excessive noise, and significant oil in the refrigerant. In April 2005, one of the reciprocating compressors failed again; the replacement cost was estimated to be $12,800. Rather than replace the compressor like for like, the chiller was retrofitted with one R-134a 80-ton oil-less centrifugal Turbocor compressor, a transformer to step the voltage from 230V to 480V, an electronic expansion valve (EXV), and a variable frequency drive to control the two condenser fans. Click here to read this case study. (PDF 1 MB)

Ultra-Efficient HVAC Design and Control The County of San Diego Crime Laboratory is a 102,000 sq ft facility that provides assistance to the criminal justice system by analyzing and evaluating physical evidence in criminal investigations and prosecutions. Needing additional lab space, but faced with an antiquated HVAC system and escalating energy costs, the County of San Diego Sheriff’s Department began searching for ways to reduce electrical usage and demand, and at the same time increase the quantity, quality and reliability of their labs. A HVAC system featuring oil-less chillers and environmentally friendly R-134a was designed to meet their needs. Click here to read this case study. (PDF 462 KB)

U.S. Navy Studies Oil-Free Compressor Technology The U.S. Navy evaluates the performance of the Danfoss Turbocor Oil-Free compressor technology in head-to-head comparison in a San Diego U.S. Navy Facility. The evaluation is part of the Navy’s Techval (Technology Validation) Program, which was created by the Navy to assess the effectiveness and viability of technologies that have potential to reduce energy consumption, pursuant to the goals set forth in Energy Policy Act 2005 (EPACT05). Click here to read this case study. (PDF 170 KB)

New Chiller Technology Solves Problem for Plastics Firm UPM Inc., a California plastics manufacturing firm, had a problem. If their chillers went down, their whole plant went down. And they didn't trust their chillers. A solution involving two chillers with Turbocor compressors was developed and implemented. UPM now benefits from the energy savings, lower maintenance, no compressor oil, and only one moving part in their new oil-free compressors. Click here to read this case study. (PDF 88 KB)

TURBOFIT Another Danfoss Turbocor retrofit solution completed at Del Mar Gateway Building in San Diego, California The Del Mar Gateway building in San Diego is an eight-story 172,500 square foot office facility that has been identified as one of the most sought-after office locations in the area. An upgrade of their existing centrifugal chillers to use new Turbocor oil-less VFD compressors has improved reliability, efficiency, and acoustics, making the facility mechanically more attractive. Click here to read this case study. (PDF 143 KB)

Advanced Compressor Technology Solves Retrofit Problem Keith Sinclair had a problem. He owned an attractive and ideally located office building in South Pasadena, in Los Angeles County. The five-story building at 1499 Huntington Drive had 28,000 square feet of rentable office space, and Sinclair’s goal was to keep it rented. But in recent years, a failing comfort system was causing occasional building cooling failures, and the rising costs of system maintenance were cutting into the profitability of the building. He needed a change. The solution he selected is one from which others in the same situation can learn and profit. Click here to read this case study. (PDF 83 KB)

Technology Brief...The Danfoss Turbocor Compressor The California State Railroad Museum, located in Old Sacramento, is a complex of historic buildings and unique attractions for visitors of all ages. The museum features lavishly restored trains, engaging exhibits, and special events throughout the year. In order to preserve precious artifacts, museums are often required to provide climate-controlled space 24 hours per day, 365 days per year in their exhibit halls. Unfortunately, this requirement often translates to high energy and maintenance costs. Faced with skyrocketing maintenance costs and budget shortfalls, the museum decided to replace its existing 360-ton, centrifugal chiller with two, 160-ton, McQuay chillers equipped with Turbocor centrifugal compressors. The new chillers were installed in the summer of 2004 and are expected to save the museum over $25,000 in annual energy costs alone. The site will also serve as a demonstration site for this new technology. Click here to read this technology brief. (PDF 357 KB) Note: This technology brief was developed by SMUD (Sacramento Municipal Utility District) and is used with permission.