Presentation Transcript

1. Advancing Flow Measurement Technology Improves Energy Monitoring

   Darren Bevill, CEM, CFM Campus Energy Manager Vanderbilt University Jerry Gallo National Sales Manager Veris Inc. Niwot, CO 11/09/11 Invensys proprietary & confidential
2. Veris Inc. Niwot, CO USAEngineered Flow Measurement Solutions Veris Inc. flow meters provide superior accuracy over the broadest application range. Designed for use in gases, liquids and steam, our Accelabar(0.5% of reading accuracy, typical turndown in flow 20:1) product line has been thoroughly tested at independent, NIST traceable flow laboratories. From campus and central energy management applications (steam, water, natural gas, compressed air) to GHG monitoring (CO2, fuel gases, landfill gas, etc.) Veris products are field-proven in thousands of installations worldwide. Veris Inc. founded in 1987 has been a leader in DP flow technology for over 20 years.
3. Vanderbilt University Founded in 1873. Current enrollment approximately 13,000 Internationally recognized research university Campus includes 238 buildings spread over 330 acres Total of 18 million square feet – University: 6 million square feet, Medical:910 million square feet, Real Estate: 2 million square feet.
4. Vanderbilt Campus Energy Vanderbilt consumed over 385,000 mega-watt hours of electricity in 2010 20% of electricity generated at the on campus co-generation facility that burns coal and natural gas to produce electricity, steam and chilled water that is used in campus buildings. Remaining 80% of electricity consumed by Vanderbilt is purchased from the Tennessee Valley Authority (TVA). 100% of steam generated on campus for distribution to individual buildings (including residential halls, research facilities and hospitals).
5. Vanderbilt Receives 2011 Energy Management Achievement Award Recognized by Middle Tennessee Chapter of the Association of Energy Engineers and the Center for Energy. Award recognized recent energy efficiency improvements to Rand Hall. Plant operations improved the heating and cooling system and upgraded the building automation control system.
6. Common Goals/ Considerations Monitor steam flow to individual buildings and total flow from central power house to determine a Benchmark (Baseline) as well as an energy balance. Once a baseline usage is determined, cost savings goals i.e. each dept. tasked to reduce steam consumption by “X” % can be monitored on a real time basis. Ability to install meters to replace existing non working meters and new meters with a minimum of piping modifications. Install meters with low cost of ownership. (no moving parts, or calibration required. Ability to bill departments for low demand periods where previous meters were unable to read low enough.
7. Problems with Installation in Existing Piping Most piping systems were not designed with flow measurement in mind. Most energy management projects were enacted well after building and piping construction. It is difficult to find an optimum location for flow meters. Straight-run is at a minimum.
8. Problems with Installation in Existing Piping Straight-Run Requirements Flow meter manufacturers publish straight-run requirements to assure that their meter will meet its accuracy specification. Elbows, valves, tees and other obstructions cause flow profile distortions and swirl that can affect the meter’s accuracy. The next slide is a typical chart showing obstructions and the related straight-run required (in pipe diameters) up and downstream of the meter. Compact Package All transmitted signals, D/P, PRESSURE, TEMPERATURE contained in the meter body. No additional hardware or piping modifications required. IMV30 outputs 4 – 20 madc / HART signal proportional to corrected flow.
9. Vanderbilt University Solution Veris Accelabar combined flow meter technology with RTD. RTD is outputted separately to monitor temperature of steam to insure remote locations of the campus are receiving quality steam. Foxboro IMV 30 Multivariable transmitter capable of saturated steam compensation with 4-20mA output of compensated flow.
10. Accelabar® Design The INLET is a patented torroidal radius that accelerates and conditions the flow to produce a linear velocity profile. The STRAIGHTENING & SETTLING ZONE stabilizes & linearizes the velocity profile. The DIFFUSER is a gradual increase in the diameter to reduce the permanent pressure loss.
11. Combined Technology Meter Eliminates Straight-run Requirements No straight pipe is required up-stream of the meter, regardless of piping configuration The straight run is integral to the meter. The stabilization and linearization of the velocity profile within the throat of the nozzle eliminates the need for any upstream straight run. Orifice plates, Turbine Meters, Thermal Mass, Averaging Pitots, etc. require 10 to 30 pipe diameters of straight run.
12. Foxboro IMV30 Multivariable Transmitter The Model IMV30 adds comprehensive density and flow rate calculations, making it an out-standing mass flowmeter when used with any variety of differential pressure-producing primary flow devices. Utilizes digital communications to transmit their multiple measurements and provide a 4 to 20 mA analog output signal assignable to any measurement or calculated value. A PC-based configuration software package, Model PCMV allows selection of Accelabar type meter, flow and density equations, pipe and element size and material, fluid properties, and flow rate type (mass, standard volume, or actual volume).
13. University Steam Installations with HighTurndown and Limited Straight-run Saturated steam to campus buildings and dorms Monitoring steam usage during peak and low demands Stacked IMV30 transmitters to cover wide range of flows. Replaced flow meters requiring heavy maintenance and line outages.
14. Combined DP Technology Meter for Campus Chilled Water ApplicationsIDP10T’s One10” meter required per chiller. Minimum straight-run available. Some installations are in vertical pipe runs. Monitoring from 20 GPM to 600 GPM (30-1 turndown) chilled water to four buildings with seasonal demands. Meter supplied with integral reducers 12” Body to 10” Pipe.
15. Natural Gas to Boiler Requiring Large Turndown 3” Meter Shown (one of eight) Measuring natural gas to boilers Measurement used for energy accounting – peak and low demand. Limitations of old meter left low demand gas usage unaccounted for.
16. Simple Solutions for Complex Flow Measurement Applications Limited straight run applications. Low velocity flow rates in gas, liquid, and steam. High Accuracy over extended turndowns. Extended rangeability for accurate energy accounting Integral RTD Minimal Face to Face requirements. MV transmitter with the ability to correctly calculate compensated flow based on Accelabar technology.