[BLDG-SIM] Steam-Turbine Drive Centrigugal LiquidChillers - UPDATE

[Varkie Thomas]

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 at york.com] 

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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