Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB(13) station Perth 45 years (1967-2011)| | BoM 9021 (WMO 94610) -31.93° latitude 115.98° longitude 20.0 m alt| | | |It is now 04-Jul-2013 00:00:11 -> computational time was 7 minutes| | OUTPUTS | | INPUTS => NEW33/13/PE_13_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/13/PE_13_DB.txt (Dry Design Day)| | B: CZ0505_NatHERS_1967-2011_w.txt => NEW33/13/PE_13_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/13/PE_13_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 38.2 °C Design DB = mean of 10th highest 3PM each year + (std dev * 1.36) => this Design DB was exceeded 10.2 days/year (incl std dev 3.4 days/year). 38.5 ° alternative Design DB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design DB was exceeded 9.6 days/year (incl std dev 3.3 days/year). Design drybulb changes 2.6 °C per century (linear regression R² 0.29) ~> 40.1 °C mid century. 21.5 ° Design WB = mean of 10th highest 3PM each year + (std dev * 1.89) => this Design WB was exceeded 10.1 days/year (incl std dev 3.9 days/year). 21.7 ° alternative Design WB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design WB was exceeded 8.6 days/year (incl std dev 3.5 days/year). Design wetbulb changes -0.3 °C per century (linear regression R²=-0.07) ~> 21.5 °C mid century. 4.4 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 0.89) => this Heating DB was insufficient 9.9 days/year (incl std dev 4.5 days/year). 3.3 ° alternative Heating Design = mean of 10th lowest daily minimum each year - (1 std dev) => alternative Heating Design was insufficient 10.3 days/year (incl std dev 4.6 days/year). Design heating changes -2.4 °C per century (linear regression R²=-0.32) ~> 1.9 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 04:28 followed by maximum temperature at 15:21. Nighttime cooling rate 0.466 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 03:03 ~ Max at 15:36 Nighttime cooling rate 0.606 °/hr from 19:53 to 07:29 (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at 00:18 ~ Max at 15:48 Nighttime cooling rate 0.574 °/hr from 19:59 to 07:8 (evenings following 3PM design conditions). ___________________________________________________________________________ ___________________________________________________________________________ |Option 1 Dry summer | Option 2 Wet summer |Winter(8AM)| Daily | Yearly | |design DB / coinc WB | coinc DB / design WB | heating | Range | Range | | 38.2 DDB / 19.0 CWB | 29.3 CDB / 21.5 DWB | 4.4 DB |14.1 DB| 33.8 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.25 % | 3.86 % | 5.84 % | 0.37 % | 0.49 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 3.97 % | 6.01 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.61 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=203) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 7875| 38.7| 21.5| 17.2| 15:36| 03:03| |+/- 1066|+/- 0.9|+/- 2.6|+/- 2.6|+/-01:12|+/-05:56| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=356) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 6802| 21.7| 16.4| 5.3| 15:48| 00:18| |+/- 1747|+/- 0.7|+/- 2.0|+/- 1.8|+/-03:30|+/-08:22| +/- standard deviation |________|________|_______|_________|________|________| AIRAH critical design excludes 0.25 % extremes (24 hours and 8AM-6PM) _________________________________________________ _________________________ | Critical Cooling || Critical Heating | | 24 hour | 8AM-6PM || 24 hour | 8AM-6PM | | DB / WB | DB / WB || DB | DB | | 38.3 / 21.9 | 39.8 / 22.3 || 3.5 | 6.9 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 37.4 DDB / 18.8 CWB | 29.3 CDB / 21.5 DWB | 4.1 DB | 0.4 % | 35.3 DDB / 18.4 CWB | 28.6 CDB / 20.6 DWB | 5.4 DB | 1.0 % | 33.4 DDB / 18.0 CWB | 28.0 CDB / 19.9 DWB | 6.6 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 420 | 881 | 282 | 139 | mean annual degrees days |+/- 56 |+/- 84 |+/- 50 |+/- 29 | +/- standard deviation |____________|____________|____________|____________| Cooling degree hour base temps 21 °C, 24 °C & 27 °C. _____________________________________________________ | Cooling | Cooling | Non-Evaporative Cooling | |DegHr base24|DegHr base27|WB DH base21|WB DH base24| | 6767 | 3325 | 48 | 1 | mean annual degrees hours |+/- 1194 |+/- 706 |+/- 51 |+/- 2 | +/- standard deviation |____________|____________|____________|____________| Average cooling and heating degree hours (D-Hr) tabulated by month _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 24.1| 24.5| 22.4| 18.9| 15.7| 13.5| 12.6| 12.9| 14.2| 16.4| 19.3| 22.0| Average Temperature (DB) | 1.2| 1.4| 1.2| 1.2| 1.0| 0.9| 0.7| 0.8| 0.6| 1.1| 1.3| 1.3| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 43| 33| 103| 386| 993| 1625| 2082| 1985| 1434| 920| 346| 123| HD-Hr base 15 °C | 37| 34| 81| 205| 352| 444| 438| 400| 254| 270| 162| 76| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 220| 164| 387| 1037| 2204| 3206| 3875| 3708| 2878| 2023| 988| 465| HD-Hr base 18 °C | 112| 102| 201| 370| 500| 546| 501| 498| 345| 442| 322| 195| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 1775| 1713| 1168| 326| 47| 1| 0| 1| 18| 149| 490| 1079| CD-Hr base 24 °C | 494| 553| 369| 181| 48| 3| 1| 3| 23| 92| 251| 404| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 961| 917| 546| 106| 7| 0| 0| 0| 2| 46| 210| 530| CD-Hr base 27 °C | 328| 372| 227| 85| 12| 0| 0| 0| 4| 37| 135| 246| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 13| 26| 7| 0| 0| 0| 0| 0| 0| 0| 0| 2| NECD-Hr base 21 °C | 25| 34| 12| 1| 0| 0| 0| 0| 0| 0| 0| 3| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| NECD-Hr base 24 °C | 1| 2| 0| 0| 0| 0| 0| 0| 0| 0| 0| 0| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 15.9| 16.2| 15.1| 13.6| 11.7| 10.5| 9.8| 9.8| 10.6| 11.6| 13.3| 14.8| Average Wet Bulb Temp (WB) | 0.6| 0.9| 0.9| 0.8| 1.0| 1.0| 0.7| 0.8| 0.7| 0.7| 0.7| 0.8| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 5.73% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 40.3| 39.7| 37.8| 32.6| 28.0| 23.1| 21.9| 23.1| 26.4| 31.6| 35.8| 38.5| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 38.3| 38.1| 36.0| 31.0| 26.5| 22.0| 21.0| 21.8| 24.8| 28.9| 33.1| 36.3| Design maximum DB | 24.2| 25.0| 23.2| 20.3| 17.3| 15.6| 14.5| 14.6| 15.0| 17.0| 19.5| 22.4| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 11.2| 11.9| 9.4| 7.0| 5.3| 3.6| 2.7| 2.8| 4.0| 4.8| 7.4| 9.4| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 5.27% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 22.3| 22.7| 21.7| 20.2| 18.7| 16.8| 16.1| 15.9| 16.7| 18.0| 19.6| 21.1| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 21.2| 21.6| 20.6| 19.0| 17.2| 15.8| 14.7| 14.7| 15.4| 17.1| 18.4| 20.0| Design maximum WB | 18.4| 19.5| 18.2| 17.0| 15.1| 13.7| 12.8| 12.8| 13.0| 14.3| 15.8| 17.3| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 8.5| 8.7| 7.6| 6.0| 4.6| 2.9| 2.1| 2.4| 3.5| 4.1| 6.1| 7.5| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|