Laboratory Evaluation of the OASys Indirect/Direct Evaporative

More documents

Recommendations

Info

491-06.12.doc A-8 Table 6: OASys Test Data (Continued) Test Summary Information Sensitivity to External Resistance Voltage Sensitivity - Damper Closed, Intake at 91°Fdb / 69°Fwb General High Fan Speed Medium Fan Speed Date (2006) 27-Sep 27-Sep 27-Sep 27-Sep 27-Sep 27-Sep 21-Sep 21-Sep 21-Sep 21-Sep 21-Sep 21-Sep 21-Sep Start Time 2:39p 2:54p 3:09p 3:24p 3:40p 3:47p 3:10p 2:50p 4:45p 3:34p 4:00p 4:22p 4:33p Duration (minutes) 10 10 10 10 5 5 10 15 10 10 10 10 10 Barometric Pressure (in. of Hg) Inlet Air Properties 29.56 29.56 29.56 29.56 29.55 29.55 29.33 29.33 29.25 29.32 29.31 29.29 29.26 Dry Bulb Temperature (°F) 91.0 91.0 91.0 91.0 90.9 91.0 90.9 91.0 91.1 91.0 91.0 91.0 91.0 Dew Point Temperature (°F) 57.9 57.9 58.0 57.6 57.6 57.7 56.7 57.9 57.7 58.0 58.3 58.0 57.3 Wet Bulb Temperature (°F) 69.1 69.1 69.1 68.9 68.9 69.0 68.4 69.0 68.9 69.0 69.2 69.0 68.7 Wet Bulb Depression (°F) 22.0 22.0 21.9 22.1 22.1 22.1 22.6 22.0 22.2 22.0 21.8 22.0 22.3 Relative Humidity (%) Interstage Air Properties 33.0 32.9 33.1 32.6 32.6 32.7 31.6 33.0 32.6 33.0 33.4 33.0 32.3 Measured Dry Bulb Temperature (°F) 72.7 73.7 72.8 73.6 73.7 74.2 71.8 73.8 70.8 75.3 72.9 74.1 73.5 Calculated Dry Bulb Temperature (°F) 1 Supply Air Properties 86.1 85.5 85.2 84.6 84.2 84.1 84.3 84.0 84.0 83.8 83.8 83.4 83.1 Dry Bulb Temperature (°F) 69.4 69.1 68.9 68.4 68.1 68.1 67.3 67.8 67.6 67.7 67.8 67.6 67.1 Dew Point Temperature (°F) 66.1 66.0 66.0 65.7 65.6 65.7 65.3 65.9 65.8 65.9 66.0 65.7 65.3 Wet Bulb Temperature (°F) 67.6 67.4 67.3 66.9 66.8 66.9 66.3 66.9 66.7 66.8 67.0 66.7 66.3 Relative Humidity (%) 91.2 91.7 92.3 92.9 93.4 94.0 95.2 95.4 95.7 95.7 95.8 95.6 96.0 External Resistance (IW) Exhaust Air Properties 0.00 0.10 0.20 0.30 0.40 0.50 0.30 0.30 0.30 0.30 0.30 0.30 0.30 Dry Bulb Temperature (°F) 84.6 83.4 82.4 81.5 80.8 80.1 80.2 80.5 80.1 80.5 80.3 80.0 79.7 Dew Point Temperature (°F) 77.8 77.4 76.8 76.1 75.5 75.0 74.6 75.2 75.0 75.2 75.2 75.1 74.8 Wet Bulb Temperature (°F) 79.5 78.9 78.2 77.5 76.9 76.3 76.1 76.6 76.3 76.6 76.5 76.4 76.0 Relative Humidity (%) Water Properties 80.3 82.0 83.2 83.8 83.9 84.4 83.3 83.8 84.3 83.8 84.5 85.2 85.0 Basin Temperature (°F) 72.1 71.6 71.7 70.7 70.1 69.7 70.1 70.2 69.5 70.4 70.0 69.8 69.5 Makeup Water Flow (gph) - measured 3.4 3.8 3.1 3.9 2.9 2.6 3.3 2.7 3.7 3.1 2.9 2.7 2.6 Total Evaporation Rate (gph) - calculated 3.9 3.8 3.6 3.6 3.4 3.3 3.2 3.0 3.0 2.9 2.7 2.6 2.5 Fraction to Supply Air (%) Power Consumption 73% 68% 64% 61% 57% 53% 61% 59% 60% 58% 57% 55% 54% Voltage (V) 115 115 115 115 115 115 121 115 116 111 104 101 95 Current (A) 6.4 6.4 6.4 6.4 6.4 6.4 4.4 4.3 4.3 4.3 4.3 4.3 4.3 Power (W) 586 587 586 586 587 584 456 436 436 419 396 381 359 Power Factor 0.80 0.80 0.80 0.80 0.80 0.80 0.87 0.87 0.87 0.88 0.88 0.88 0.88 Fan Speed (RPM) Performance 1,121 1,121 1,121 1,121 1,121 1,122 1,023 1,001 1,000 977 938 910 864 Dry Bulb Temperature Drop (°F) 21.6 21.9 22.1 22.6 22.8 23.0 23.6 23.2 23.5 23.3 23.2 23.4 23.9 Dew Point Temperature Rise (°F) 8.2 8.1 8.0 8.1 8.0 8.0 8.6 8.0 8.1 7.9 7.7 7.8 8.0 Wet-Bulb Effectiveness (%) 98.4 99.8 100.9 102.2 103.3 104.1 104.7 105.4 105.9 106.0 106.2 106.5 107.2 Supply Airflow Rate (CFM) 1,451 1,338 1,238 1,141 1,039 934 981 944 954 909 848 801 726 Exhaust Airflow Rate (CFM) 194 232 263 293 324 352 283 285 275 277 271 269 265 Intake Airflow Rate (CFM) 1,637 1,562 1,494 1,427 1,357 1,279 1,257 1,223 1,223 1,180 1,114 1,065 986 Fan Intake CFM / W 2.79 2.66 2.55 2.44 2.31 2.19 2.76 2.80 2.81 2.82 2.82 2.80 2.75 Room Capacity (tons; 80°F reference) 1.32 1.26 1.18 1.14 1.06 0.96 1.06 0.98 1.01 0.95 0.88 0.85 0.80 Room EER (Btu/Wh, 80°F reference) 27.1 25.7 24.2 23.3 21.7 19.7 28.0 27.0 27.8 27.3 26.7 26.7 26.7 CA T-20 ECER (Btu/Wh) 2 - - - - - - - - - - - - - Sensible Cooling of Outside Air (tons) 2.70 2.52 2.35 2.22 2.04 1.84 1.98 1.87 1.91 1.81 1.68 1.60 1.48 Outside Air EER (Btu/Wh) 55.2 51.6 48.2 45.4 41.7 37.9 52.1 51.4 52.6 51.7 50.8 50.5 49.5 1 Calculated interstage temperature is the intersection of the intake dew point and the supply wet bulb. 2 ECER can only be derived when the supply resistance is 0.3" and the wet-bulb depression is >=25°F Appendix – Test Data
491-06.12.doc A-9 Table 6: OASys Test Data (Continued) Test Summary Information Sensitivity to External Resistance - Exhaust Damper Open, Intake at 91°Fdb / 69°Fwb General Low Fan Speed Medium Fan Speed High Fan Speed Date (2006) 16-Oct 16-Oct 16-Oct 16-Oct 16-Oct 13-Oct 13-Oct 13-Oct 13-Oct 13-Oct 13-Oct 13-Oct 13-Oct 13-Oct 13-Oct 13-Oct 13-Oct Start Time 1:48p 2:40p 2:57p 3:15p 3:48p 4:19p 3:53p 3:31p 3:12p 2:53p 10:21a 11:00a 11:44a 12:46p 1:24p 1:48p 2:23p Duration (minutes) 15 10 10 10 15 10 10 10 10 15 30 30 15 30 15 15 15 Barometric Pressure (in. of Hg) Inlet Air Properties 29.33 29.32 29.31 29.31 29.31 29.29 29.29 29.29 29.29 29.29 29.34 29.32 29.30 29.28 29.29 29.30 29.29 Dry Bulb Temperature (°F) 91.0 91.0 90.9 90.9 91.0 90.9 91.0 91.0 91.0 91.0 91.0 91.0 91.0 91.0 91.0 91.0 91.0 Dew Point Temperature (°F) 56.4 57.7 57.8 58.4 57.8 58.0 58.1 57.8 57.0 57.4 57.7 58.1 58.0 57.8 57.7 57.9 58.7 Wet Bulb Temperature (°F) 68.3 68.9 68.9 69.2 69.0 69.0 69.1 69.0 68.6 68.7 68.9 69.1 69.0 68.9 68.9 69.0 69.4 Wet Bulb Depression (°F) 22.7 22.1 22.0 21.7 22.1 21.9 21.9 22.1 22.4 22.2 22.1 21.9 21.9 22.1 22.1 22.0 21.6 Relative Humidity (%) Interstage Air Properties 31.3 32.7 33.0 33.6 32.8 33.2 33.2 32.9 32.0 32.4 32.7 33.2 33.1 32.8 32.7 32.9 34.0 Measured Dry Bulb Temperature (°F) 73.6 73.3 70.1 69.3 68.9 72.2 69.7 69.4 68.2 68.4 73.3 72.1 69.6 68.3 68.6 67.6 67.7 Calculated Dry Bulb Temperature (°F) 1 Supply Air Properties 82.9 83.6 82.0 81.1 80.2 83.2 82.0 80.9 80.1 79.9 83.1 82.3 81.8 80.9 80.5 80.4 80.3 Dry Bulb Temperature (°F) 67.3 68.1 67.4 67.2 66.6 68.1 67.5 66.9 66.2 66.4 68.1 67.8 67.4 67.0 66.7 66.8 67.2 Dew Point Temperature (°F) 64.5 65.4 65.1 65.2 64.6 65.4 65.2 64.8 64.1 64.3 65.2 65.3 65.1 64.8 64.6 64.7 65.1 Wet Bulb Temperature (°F) 65.8 66.6 66.2 66.2 65.6 66.7 66.3 65.8 65.2 65.3 66.5 66.4 66.2 65.8 65.7 65.7 66.2 Relative Humidity (%) 92.6 93.1 94.0 95.1 94.9 92.9 94.0 94.7 95.0 94.8 92.0 93.3 94.0 94.4 94.6 94.8 94.8 External Resistance (IW) Exhaust Air Properties 0.00 0.00 0.10 0.20 0.30 0.00 0.10 0.20 0.30 0.38 0.00 0.10 0.20 0.30 0.37 0.40 0.48 Dry Bulb Temperature (°F) 80.6 80.9 78.5 76.4 73.9 81.0 78.6 76.3 74.0 73.1 80.8 79.1 77.3 75.0 74.1 73.9 73.3 Dew Point Temperature (°F) 75.0 75.5 73.6 71.9 70.4 76.2 74.0 72.5 71.0 70.3 75.4 74.3 73.3 72.1 71.4 71.2 70.8 Wet Bulb Temperature (°F) 76.5 76.9 74.9 73.2 71.4 77.4 75.2 73.5 71.8 71.1 76.8 75.6 74.4 72.9 72.2 72.0 71.5 Relative Humidity (%) Water Properties 83.1 83.5 84.9 86.1 88.6 85.5 86.0 87.8 90.1 90.9 83.6 85.5 87.5 90.9 91.2 91.4 92.1 Basin Temperature (°F) 70.1 70.8 69.3 68.4 66.8 70.3 68.9 67.7 66.6 66.3 71.2 70.2 69.4 68.0 67.3 67.1 67.1 Makeup Water Flow (gph) - measured 3.7 3.2 3.6 3.9 3.3 3.8 3.6 3.6 3.8 2.8 3.9 3.9 4.2 4.1 4.1 4.1 4.1 Total Evaporation Rate (gph) - calculated 3.1 3.1 2.9 2.7 2.6 3.5 3.4 3.3 3.2 3.0 3.8 3.8 3.8 3.7 3.6 3.5 3.3 Fraction to Supply Air (%) Power Consumption 59% 60% 47% 35% 24% 59% 48% 38% 30% 23% 61% 52% 44% 35% 31% 29% 22% Voltage (V) 115 115 115 115 116 115 115 115 115 115 114 114 114 114 115 115 115 Current (A) 4.0 4.0 4.0 4.0 4.0 4.4 4.4 4.4 4.4 4.3 6.4 6.4 6.4 6.4 6.4 6.4 6.4 Power (W) 387 388 389 390 388 439 438 438 437 436 582 579 580 582 586 585 584 Power Factor 0.85 0.85 0.85 0.85 0.85 0.87 0.87 0.87 0.87 0.87 0.80 0.80 0.80 0.80 0.80 0.80 0.80 Fan Speed (RPM) Performance 873 875 875 877 880 999 998 997 996 998 1,122 1,121 1,121 1,122 1,122 1,122 1,122 Dry Bulb Temperature Drop (°F) 23.7 23.0 23.5 23.7 24.4 22.8 23.5 24.1 24.8 24.6 22.9 23.2 23.5 24.1 24.3 24.2 23.8 Dew Point Temperature Rise (°F) 8.1 7.7 7.3 6.8 6.8 7.4 7.1 7.0 7.1 6.8 7.5 7.2 7.1 7.0 6.9 6.8 6.4 Wet-Bulb Effectiveness (%) 104.4 103.9 106.9 109.3 110.5 104.2 107.0 109.4 110.7 110.8 103.6 105.9 107.3 108.9 109.7 110.0 110.2 Supply Airflow Rate (CFM) 1,018 1,018 812 595 388 1,180 968 771 584 438 1,340 1,164 996 807 689 638 492 Exhaust Airflow Rate (CFM) 278 276 394 538 670 298 435 563 686 776 333 447 561 689 763 792 890 Intake Airflow Rate (CFM) 1,290 1,288 1,200 1,128 1,053 1,471 1,396 1,328 1,264 1,208 1,665 1,603 1,549 1,488 1,446 1,423 1,376 Fan Intake CFM / W 3.33 3.31 3.08 2.89 2.71 3.35 3.19 3.03 2.89 2.77 2.86 2.77 2.67 2.55 2.47 2.43 2.36 Room Capacity (tons; 80°F reference) 1.11 1.04 0.87 0.65 0.44 1.20 1.03 0.86 0.69 0.51 1.36 1.21 1.07 0.90 0.78 0.72 0.54 Room EER (Btu/Wh, 80°F reference) 34.3 32.0 26.9 20.0 13.7 32.7 28.2 23.6 19.0 14.0 28.1 25.1 22.1 18.5 16.0 14.8 11.0 CA T-20 ECER (Btu/Wh) 2 - - - - - - - - - - - - - - - - - Sensible Cooling of Outside Air (tons) 2.06 2.00 1.63 1.21 0.81 2.29 1.94 1.59 1.24 0.92 2.62 2.30 2.00 1.65 1.43 1.32 1.00 Outside Air EER (Btu/Wh) 63.8 61.6 50.2 37.1 25.0 62.8 53.0 43.5 34.0 25.3 54.1 47.7 41.3 34.0 29.2 27.0 20.5 1 Calculated interstage temperature is the intersection of the intake dew point and the supply wet bulb. 2 ECER can only be derived when the supply resistance is 0.3" and the wet-bulb depression is >=25°F Appendix – Test Data
Page 1 and 2: Pacific Gas and Electric Company PY
Page 3 and 4: CONTENTS EXECUTIVE SUMMARY ........
Page 5 and 6: EXECUTIVE SUMMARY Testing was condu
Page 7 and 8: INTRODUCTION Background The increas
Page 9 and 10: humidity), and reach what is called
Page 11 and 12: evaporative cooler and heat exchang
Page 13 and 14: An alternative measure of capacity
Page 15 and 16: 13. Make-up water flow rate, using
Page 17 and 18: Table 3: Test Point Matrix (Highlig
Page 19 and 20: °F 120 110 100 90 80 70 60 50 40 D
Page 21 and 22: combines the effects of airflow, ef
Page 23 and 24: 60 Figure 11: Performance at All Va
Page 25 and 26: Figure 22 and Figure 23 are plots o
Page 27 and 28: high speed. Increasing the outlet r
Page 29 and 30: 491-06.12.doc APPENDIX
Page 31 and 32: Appendix - Figures Intake Airflow (
Page 33 and 34: Appendix - Figures Power (W) Wet-Bu
Page 35 and 36: Appendix - Figures Water Consumptio
Page 37: 491-06.12.doc A-7 Table 6: OASys T
Page 41 and 42: 491-06.12.doc A-11 Table 6: OASys T
Page 43: 491-06.12.doc A-13 Table 6: OASys T

Laboratory Evaluation of the OASys Indirect/Direct Evaporative

Create successful ePaper yourself

Delete template?

Save as template?