Ochsner Medical Center
Transcription
Ochsner Medical Center
Ochsner Medical Center Ochsner Medical Center gains control, reduces energy consumption with Siemens Demand Flow® Solution. www.usa.siemens.com/demandflow “ I know that it takes less energy, but mostly, the redesigned system is a lot easier for me to control. Before, I had to look at four systems for my one chilled water plant. But now I can see everything, for every building, in one place.” Terry Dillenkoffer Manager & Chief Engineer Facilities Management Ochsner Medical Center Ochsner Medical Center is located just outside New Orleans on Jefferson Highway and is part of Louisiana’s largest non-profit academic healthcare system: Ochsner Health System. Since opening in 1942, Ochsner Health System has since grown to eight hospitals and 38 health centers, employing more than 12,000 people and 750 physicians. automate the plant and reduce total plan energy consumption. Ochsner Health System identified several key goals when it engaged Siemens: Over the decades, Ochsner Medical Center added several buildings to its campus. As the medical center expanded, so did its central plant. During the expansion, many manual processes of plant operation remained in place while some system components were added, such as pumps, which were not necessary for optimal system function and energy efficiency. Some of the additional pumps actually created problems with the system’s ability to cool effectively and efficiently. – Improve efficiency by eliminating unnecessary system components Client Objectives Ochsner Health System turned to Siemens to reduce operating costs for Ochsner Medical Center central plant. Siemens was contracted to simplify the system’s design, – Gain control over central chilled water plant with a single chilled water automation system – Optimize plant performance by automating and reengineering manual processes – Decrease costs by reducing the total chilled water plant energy consumption Siemens Solutions Siemens implemented its Demand Flow solution, a turnkey solution that optimized the chilled water system, in approximately eight months. It optimized pumping and chiller production to exactly meet the demand of the facility. The solution enabled the removal of unnecessary pumps, thereby reducing energy consumption required to operate the pumps, and was able to maintain optimum system pressure and temperature. Answers for infrastructure. Demand Flow is a patent-pending, proven control strategy for chiller plant optimization that reduces a central plant’s total energy consumption by 20-50%. It offers a holistic approach for the entire chilled water system, including potential airside savings. This optimization increases the deliverable tonnage and simplifies plant operations and controls, without sacrificing occupant comfort. Demand Flow’s specialized algorithms can deliver chilled water system efficiencies to any existing building automation system. As part of the project, Siemens installed 70 Variable Frequency Drives (VFDs) on the pumping systems, installed new high-accuracy temperature sensors and flow meters and reprogrammed the sequence of operations for the chiller plant. VFDs on the chiller compressor motors were not required as part of the Demand Flow solution; however, the optimization of the pumping systems enables the reduction of chiller compressor energy. The increased plant efficiency also leads to increased system deliverable tonnage and reduced plant runtime. Client Results Prior to Siemens implementation of the Demand Flow solution, there were four building automation systems serving various parts of the facilities. All four needed to be monitored to operate the campus’ one chilled water system. Today, the Demand Flow solution has provided the facility engineers with a single system where Siemens Industry, Inc. Infrastructure & Cities Sector Building Technologies Division 1000 Deerfield Parkway Buffalo Grove, IL 60089 Tel: (847) 215-1000 Fax: (847) 215-1093 they can view, track, trend, and manage all of the chilled water system’s critical data from a single head end. Highlights ■■ nnual energy savings A of $1,033,000 ■■ Monthly savings of $86,000 guaranteed by Siemens ■■ Reduction of 19,656,000 pounds of CO2 per year – Reduction of 19,656,000 pounds of CO2/yr ■■ – Chiller ton-hours reduction of an average of 1.1 million per month, or 26.6% Chiller ton-hours reduced by 26.6% ■■ Annual electricity usage reduced by 36.3% In the first year following implementation, the project achieved: – Annual savings of $1,033,000/yr or 15,590,763 kWh/yr – Electric kWh reduction of an average of 1.3 million per month, or 36.3% – Efficiency kW/ton improvement of 16.2% Siemens guaranteed an average $86,000 in monthly savings generated by Demand Flow and completed the project on schedule. It did not need to provide temporary cooling, which helped reduce the overall costs of the project. Most importantly, patient care was not adversely affected by the implementation of Demand Flow. The information in this document contains general descriptions of technical options available, which do not always have to be present in individual cases. The required features should therefore be specified in each individual case at the time of closing the contract. 03/12 | Printed in USA | 153-SBT-411 © 2012 Siemens Industry, Inc.