Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB(48) station Dubbo 45 years (1967-2011)| | BoM 65070 (WMO 95719) -32.22° latitude 148.57° longitude 285.0 m alt| | | |It is now 04-Jul-2013 03:46:12 -> computational time was 7 minutes| | OUTPUTS | | INPUTS => NEW33/48/DU_48_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/48/DU_48_DB.txt (Dry Design Day)| | B: CZ0411_NatHERS_1967-2011_w.txt => NEW33/48/DU_48_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/48/DU_48_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 37.9 °C Design DB = mean of 10th highest 3PM each year + (std dev * 1.37) => this Design DB was exceeded 10.1 days/year (incl std dev 4.9 days/year). 37.9 ° alternative Design DB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design DB was exceeded 10.1 days/year (incl std dev 4.9 days/year). Design drybulb changes 3.7 °C per century (linear regression R² 0.30) ~> 40.1 °C mid century. 22.3 ° Design WB = mean of 10th highest 3PM each year + (std dev * 1.60) => this Design WB was exceeded 9.8 days/year (incl std dev 5.1 days/year). 22.4 ° alternative Design WB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design WB was exceeded 9.1 days/year (incl std dev 4.8 days/year). Design wetbulb changes 0.6 °C per century (linear regression R²=0.08) ~> 22.8 °C mid century. -0.7 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 1.10) => this Heating DB was insufficient 9.7 days/year (incl std dev 5.2 days/year). -1.3 ° alternative Heating Design = mean of 10th lowest daily minimum each year - (1 std dev) => alternative Heating Design was insufficient 9.6 days/year (incl std dev 3.7 days/year). Design heating changes -2.5 °C per century (linear regression R²=-0.40) ~> -2.8 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 04:52 followed by maximum temperature at 15:33. Nighttime cooling rate 0.627 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 04:45 ~ Max at 16:06 Nighttime cooling rate 0.900 °/hr from 19:55 to 06:46 (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at 01:15 ~ Max at 15:30 Nighttime cooling rate 0.662 °/hr from 19:43 to 06:52 (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 | | 37.9 DDB / 19.0 CWB | 28.8 CDB / 22.3 DWB | -0.7 DB |13.7 DB| 38.6 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.22 % | 4.81 % | 7.56 % | 0.31 % | 0.34 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 4.92 % | 7.69 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.52 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=185) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 8069| 38.2| 21.9| 16.4| 16:06| 04:45| |+/- 812|+/- 0.7|+/- 2.9|+/- 2.8|+/-00:54|+/-03:57| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=222) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 6477| 22.4| 17.1| 5.3| 15:30| 01:15| |+/- 1564|+/- 0.8|+/- 2.7|+/- 2.7|+/-02:54|+/-07:01| +/- 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 | | 37.7 / 22.6 | 39.0 / 23.1 || -1.1 | 1.5 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 36.9 DDB / 18.8 CWB | 28.6 CDB / 22.1 DWB | -0.5 DB | 0.4 % | 35.0 DDB / 18.4 CWB | 28.1 CDB / 21.1 DWB | 0.8 DB | 1.0 % | 33.2 DDB / 18.1 CWB | 27.7 CDB / 20.3 DWB | 2.0 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 874 | 1401 | 311 | 148 | mean annual degrees days |+/- 84 |+/- 108 |+/- 78 |+/- 51 | +/- 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| | 7462 | 3549 | 101 | 7 | mean annual degrees hours |+/- 1863 |+/- 1228 |+/- 121 |+/- 21 | +/- 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 | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 24.8| 24.1| 21.1| 16.9| 12.5| 9.5| 8.4| 9.7| 12.7| 16.7| 20.3| 23.1| Average Temperature (DB) | 1.7| 1.5| 1.3| 1.2| 1.1| 1.0| 0.8| 1.2| 1.4| 1.5| 2.0| 1.5| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 75| 62| 257| 911| 2463| 3948| 4729| 4110| 2559| 1247| 461| 146| HD-Hr base 15 °C | 91| 81| 153| 388| 602| 603| 547| 617| 594| 396| 272| 97| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 242| 215| 710| 1902| 4077| 5861| 6767| 5996| 4050| 2304| 1053| 449| HD-Hr base 18 °C | 193| 176| 291| 535| 692| 670| 582| 729| 731| 567| 453| 194| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 2132| 1580| 853| 168| 4| 0| 0| 3| 49| 289| 839| 1545| CD-Hr base 24 °C | 680| 567| 359| 129| 7| 1| 0| 11| 52| 201| 540| 565| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 1153| 787| 327| 28| 0| 0| 0| 0| 8| 94| 381| 770| CD-Hr base 27 °C | 488| 404| 222| 36| 0| 0| 0| 0| 13| 94| 344| 382| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 35| 42| 12| 0| 0| 0| 0| 0| 0| 0| 1| 9| NECD-Hr base 21 °C | 72| 67| 27| 1| 0| 0| 0| 0| 0| 3| 2| 19| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 4| 1| 1| 0| 0| 0| 0| 0| 0| 0| 0| 0| NECD-Hr base 24 °C | 18| 4| 3| 0| 0| 0| 0| 0| 0| 0| 0| 1| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 16.5| 16.7| 14.5| 11.6| 9.2| 7.0| 5.9| 6.4| 8.5| 11.0| 13.1| 14.8| Average Wet Bulb Temp (WB) | 1.1| 1.2| 1.3| 1.4| 1.3| 1.0| 1.1| 1.1| 1.2| 1.1| 1.1| 1.1| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 5.88% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 38.9| 37.3| 34.0| 29.5| 24.6| 20.6| 19.8| 22.6| 27.6| 31.9| 35.5| 37.2| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 38.0| 37.0| 33.5| 29.0| 24.0| 19.6| 18.8| 22.0| 26.5| 30.7| 34.9| 36.6| Design maximum DB | 24.3| 23.8| 21.0| 16.7| 13.8| 10.9| 9.7| 10.5| 14.0| 17.4| 21.0| 23.2| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 10.3| 10.8| 7.1| 4.1| 0.6| -1.2| -2.0| -2.0| -0.5| 1.9| 5.5| 8.1| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 4.09% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 22.8| 22.8| 21.3| 18.4| 16.5| 14.7| 13.6| 14.3| 16.5| 18.6| 20.1| 21.6| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 21.9| 22.4| 21.0| 18.2| 16.4| 14.2| 13.3| 13.9| 16.1| 18.0| 19.5| 20.7| Design maximum WB | 19.6| 20.0| 17.9| 15.2| 13.0| 10.5| 9.3| 9.3| 12.1| 14.4| 16.8| 18.6| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 7.5| 8.5| 5.4| 2.6| 0.1| -1.7| -2.4| -2.4| -1.1| 1.0| 3.8| 5.9| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|