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At the end of this message is the part load performance of steam turbine chillers. As you can see from the response from Rob Firnstein of York, energy software developers can incorporate this data into their programs.
Steam turbine chillers have recently been specified for buildings in NYC. ConEd has low summer rates for steam. Cities like Boston, Minneapolis and Philadelphia also provide district steam. Since district steam is waste energy from a power plant perhaps there should be LEED credits for using this waste energy although the ECB method might show higher costs over electric centrifugal.
Varkie Thomas
-----Original Message----- From: Robert Firnstein [mailto:robert.firnstein@xxxxxxxx] Sent: Thursday, November 11, 2004 3:20 PM To: Varkie Thomas Subject: RE: Steam Turbine YK rating
Varkie,
Feel free to forward on the information. Recently, York re-designed the software for selecting our steam turbine chillers so that we now have greater capability to pair compressors and steam turbines for optimum performance. If you are interested in seeing any generic selections for additional chillers please let me know.
Regards,
Rob Firnstein Sales Engineer York International - Chicago PH:(847)493-6124 FX:(847)759-0676
Part Load Performance at Condenser Water Temperatures (CWT) Constant Speed Operation at 4500 RPM, 125 PSIG D&S Steam Supply, Producing 41oF Chilled Water RCLWT = Refrigerant Condenser Leaving Water Temperature CWT % Load 100% 90% 80% 70% 60% 50% 40% 30% 20% 15% Tons 1800 1620 1440 1260 1080 900 720 540 360 270 85oF BHP 1,378.0 1,210.6 1,058.2 923.6 802.4 690.4 583.9 - - - - - - - - - Lbs/Hr 17,873 15,919 13,884 12,210 10,744 9,383 8,029 - - - - - - - - - Lbs/TR-Hr 9.93 9.83 9.64 9.69 9.95 10.43 11.15 - - - - - - - - - RCLWT oF 94.33 93.38 92.43 91.50 90.57 89.67 88.76 - - - - - - - - - 75oF BHP 1,182.8 1,043.2 918.6 808.1 706.6 611.3 519.1 427.5 335.3 307.1 Lbs/Hr 15,069 13,395 11,832 10,497 9,264 8,106 6,982 5,912 4,781 4,453 Lbs/TR-Hr 8.37 8.27 8.22 8.33 8.58 9.01 9.70 10.95 13.28 16.49 RCLWT oF 84.14 83.20 82.28 81.37 80.47 79.58 78.69 77.80 76.92 76.34 65oF BHP 1,035.7 921.1 817.9 723.4 634.6 550.3 467.6 384.3 299.7 264.8 Lbs/Hr 13,008 11,633 10,412 9,332 8,180 7,215 6,256 5,292 4,307 3,901 Lbs/TR-Hr 7.23 7.18 7.23 7.41 7.57 8.02 8.69 9.80 11.96 14.45 RCLWT oF 73.99 73.08 72.18 71.28 70.40 69.52 68.64 67.76 66.88 66.42 55oF BHP 926.6 828.4 738.3 654.3 574.3 496.1 418.8 339.9 259.5 220.2 Lbs/Hr 11,527 10,405 9,369 8,408 7,485 6,588 5,691 4,776 3,834 3,365 Lbs/TR-Hr 6.40 6.42 6.51 6.67 6.93 7.32 7.90 8.84 10.65 12.46 RCLWT oF 63.87 62.98 62.09 61.21 60.34 59.46 58.59 57.72 56.84 56.43
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