AHRI 550 590 I-P-2011 Performance Rating of Water-Chilling and Heat Pump Water-Heating Packages Using the Vapor Compression Cycle (Incorporated Addendum 1 September 2012 Addendum 2.pdf
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1、 2011 Standard for Performance Rating Of Water-Chilling and Heat Pump Water-Heating Packages Using the Vapor Compression Cycle Approved by ANSI on June 18, 2012 ANSI/AHRI Standard 550/590 (I-P) with Addendum 3 i AHRI STANDARD 550/590 (I-P)-2011 WITH ADDENDUM 3 Performance Rating of Water-Chilling an
2、d Heat Pump Water-Heating Packages Using the Vapor Compression Cycle September 2013 Addendum 3 (dated September 2013) of AHRI Standard 550/590 (I-P)-2011, “Changes to AHRI Standard 550/590 (I-P)-2011” is provided as follows. The following changes have been incorporated (deletions are shown by shadin
3、g in red, additions are shown by shading in gray) into the already published 2011 version of AHRI Standard 550/590 (I-P) to avoid confusion: Note: This addendum is not ANSI approved and is currently going through the process to do so. The changes include: 1. Revision to Table 10. To comply with this
4、 standard, published or reported values shall be in accordance with Table 10. Table 10. Definition of Tolerances Limits Related Tolerance Equations2,3,4CapacityCooling or Heating Capacity for units with continuous unloading1Full Load minimum: 100%- Tol1Full Load maximum: 102% 100%+ Tol1Part Load tes
5、t capacity shall be within 2% of the target part-load capacity5Tol1= 0.105 (0.07 %Load) + 0.15TFL %Load 18 TFL= Difference between entering and leaving chilled water temperature at full-load, F See Figure 3 for graphical representation of the Tol1tolerance. Cooling or Heating Capacity for units with
6、 discrete capacity steps Full Load minimum: 100% - Tol1 Full load maximum: no limit (Full Load shall be at the maximum stage of capacity) Part Load test points shall be taken as close as practical to the specified part-load rating points as stated in Table 3 Water cooled heat balance (HB) - Tol1 HB
7、+Tol1EfficiencyEER Minimum of: (100%- Tol1)(rated EER) (rated EER) / (100%+ Tol1) kW/tonRMaximum of: (100%+ Tol1)(rated kW/tonR) COP Minimum of: (100%- Tol1)(rated COP) (rated COP) / (100%+ Tol1) IPLV/NPLV (EER) Minimum of: (100%- Tol2)(rated EER) (rated EER) / (100%+ Tol2) Tol2= 0.065 + 0.35TFL 19
8、See Figure 4 for graphical representation of the Tol2tolerance. IPLV/NPLV (kW/tonR) Maximum of: (100%+ Tol2)(rated kW/tonR) IPLV/NPLV (COPR) Minimum of: (100%- Tol2)(rated COPR) (rated COPR) / (100%+ Tol2) Water Pressure Drop Maximum of: (1.15)(rated pressure drop at rated flow rate) or rated pressu
9、re drop plus 2 feet of H2O, whichever is greater Notes: 1. The target set point condenser entering temperatures (Figure 1) for continuous unloading units will be determined at the target part load test point. 2. For air-cooled units, all tolerances are computed for values after the barometric adjust
10、ment is taken into account. 3. %Load and Tol1are in decimal form. 4. Tol2is in decimal form. 5. The 2.0% tolerance shall be calculated as 2.0% of the full load rated capacity (tonsR). For example, a nominal 50.0% part load point shall be tested between 48.0% and 52.0% of the full load capacity. 2. T
11、he Full-Load Tolerance examples were revised in Section 5.6.2. 5.6.2 Full-Load Tolerance Examples. Full-Load Tolerance Examples. Full-Load Example in EER Rated Full-Load Performance: Rated Capacity = 100 tonRRated Power = 111 kW Cooling TFL= 10F EER =100 tonR 12,000BtuhtonR111 kW 1,000 W kW= 10.811
12、BtuW hAllowable Test Tolerance = Tol1= 0.105 (0.07 1.00) + 0.1510 1.00 = 0.05 = 5.00% Min. Allowable Tolerance = 100% Tol1= 100% 5% = 95% Min. Allowable Capacity(tonR) = 95% (100% 5%) 100 tonR= 95 tonRMin. Allowable EERBtuW h = 95% 10.81 = 10.27 =10.811100% + 5%= 10.296 BtuW h Full-Load Example in k
13、W/tonRRated Full-Load Performance: Rated Capacity = 100 tonRRated Power = 70 kW Cooling TFL= 10F kW tonR = 70 kW100 tonR= 0.700 kWtonRAllowable Test Tolerance = Tol1= 0.105 (0.07 1.00) + 0.1510 1.00 = 0.05 = 5.00% Min. Allowable Tolerance = 100% Tol1= 100% 5% = 95% Min. Allowable Capacity = 95% (100
14、% 5%) 100 tonR= 95.00 tonRMax. Allowable Tolerance = 100% + Tol1= 100% + 5% = 105% Max. Allowable kW tonR = 105% (100% + 5%) 0.700 kW/tonR= 0.735 kW/tonRFull-Load Example in COP (Heat Pump) Rated Full-Load Performance: Rated Heating Capacity = 1,500,000 Btu/h Rated Power = 70 kW Condenser TFL= 10F H
15、eating COPH=1,500,000Btuh70 kW 3,412.14 Btu h kW= 6.28 WWAllowable Test Tolerance = Tol1= 0.105 (0.07 1. ) + 0.1510 1.00 = 0.05 = 5.0% Min. Allowable Tolerance = 100% Tol1= 100% 5% = 95% Min. Allowable Capacity = 95%(100% 5%) 1,500,000 Btu h= 1,425,000 Btu/h Min. Allowable COPH= 95% 6.28 WW100% + 5%
16、= 5.97 5.981 WW3. The Part-Load Tolerance examples were revised in Section 5.6.3 5.6.3 Part-Load. The tolerance on part-load EER shall be the tolerance as determined from 5.6.1. Part-Load Example in EER Rated Part-Load Performance: Power at 69.5% Rated Capacity = 59.6 kW 69.5% Rated Capacity = 69.5
17、tonsRCooling TFL= 10F EER = 69.5 tonR 12,000BtuhtonR59.6 kW 1,000 W/kW= 14.0 13.993 BtuW hAllowable Test Tolerance = Tol1= 0.105 (0.07 0.695) + 0.1510 0.695 = 0.078 = 7.8% Allowable Test Tolerance = Tol1= 0.105 (0.07 0.695) + 0.1510 0.695 = 8.00% Minimum Allowable Tolerance = 100% Tol1= 100% 7.8% =
18、92.2% Minimum Allowable EER = 92.2% 14.0 13.993100% + 7.8%BtuW h= 12.91 12.982 BtuW hPart-Load Example in kW/tonRRated Part-Load Performance: Power at 50% Rated Capacity = 35 kW 50% Rated Capacity = 50 tonsRCooling TFL= 10 F kW/tontonR= 35 kW 50 tonsR= 0.700 kW/tonRAllowable Test Tolerance = Tol1= 0
19、.105 (0.07 0.50) + 0.1510 0.50 = 0.10 = 10% Allowable Test Tolerance = Tol1= 0.105 (0.07 0.50) + 0.1510 0.50 = 10.00% Maximum Allowable Tolerance = 100% + Tol1= 100% + 10% = 110% Maximum AllowablekWtonRkW/tonR= 110%(100% + 10%) 0.700 = 0.770 kW/tonR4. Revision to Section C4.3 To determine the range
20、over which the calibration achieves the required accuracy, a linear regression analysis is performed on the calibration data. The data is plotted to show the residual errors versus the calibration reference standard. tThe standard error of estimate shall be calculated for the measurement system indi
21、cated values (post calibration) versus the calibration reference standard, then using equation C1 plot a 95% prediction interval (=5%) on both sides of the calibration data points curve fit. The point(s) at which the prediction interval curve exceeds the required accuracy shall be the limit(s) of th
22、e range. Table C2 and the equations that follow explain the method of calculating the prediction interval. See example using sample data in Figures C1 and C2, in which the specified accuracy is 1% of reading, and the useable range is from 100 to 22.5 13.4, or Turn Down Ratio of 4.4:1 7.5:1. 5. Remov
23、e Table C2, Figures C1 and C2 and replace with revised Table C2, Figures C1 and C2. Table C2. Prediction Interval to Determine Range of Acceptable Accuracy Reference Standard Value 1xjyjj=1 to n Corrected (As Left) Indicated Value 2yjxjj=1 to n Absolute Prediction Interval of Indicated Value Relativ
24、e Prediction Interval of Indicated Value %RDG %FS CalibrationDatax1y1y1x1x1- y PI(x1) 111 ()x y PI xx11()PI xx 1()PI xFS x2y2y2x2x2- y PI(x2) 122 ()x y PI xx22()PI xx 2()PI xFS x3y3y3x3x3- y PI(x3) 133 ()x y PI xx33()PI xx 3()PI xFS xnynynxnxn- y PI(xn) 1 ()nnx y PI xx ()nnPI xx ()nPI xFS Regression
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