Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB( 6) station Alice Springs 45 years (1967-2011)| | BoM 15590 (WMO 94326) -23.80° latitude 133.89° longitude 547.0 m alt| | | |It is now 03-Jul-2013 23:13:14 -> computational time was 7 minutes| | OUTPUTS | | INPUTS => NEW33/6/AL_6_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/6/AL_6_DB.txt (Dry Design Day)| | B: CZ0306_NatHERS_1967-2011_w.txt => NEW33/6/AL_6_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/6/AL_6_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 41.0 °C Design DB = mean of 10th highest 3PM each year + (std dev * 1.48) => this Design DB was exceeded 10.3 days/year (incl std dev 4.8 days/year). 41.0 ° alternative Design DB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design DB was exceeded 10.3 days/year (incl std dev 4.8 days/year). Design drybulb changes 0.3 °C per century (linear regression R² 0.04) ~> 41.1 °C mid century. 23.2 ° Design WB = mean of 10th highest 3PM each year + (std dev * 2.07) => this Design WB was exceeded 10.3 days/year (incl std dev 4.8 days/year). 23.3 ° 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 4.2 days/year). Design wetbulb changes 3.2 °C per century (linear regression R²=0.37) ~> 25.2 °C mid century. -0.4 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 1.05) => this Heating DB was insufficient 10.1 days/year (incl std dev 5.7 days/year). -1.3 ° alternative Heating Design = mean of 10th lowest daily minimum each year - (1 std dev) => alternative Heating Design was insufficient 11.0 days/year (incl std dev 6.7 days/year). Design heating changes -0.9 °C per century (linear regression R²=-0.07) ~> -1.8 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 06:01 followed by maximum temperature at 16:15. Nighttime cooling rate 0.895 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 06:06 ~ Max at 15:48 Nighttime cooling rate 1.093 °/hr from 19:56 to 07:32 (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at -4:33 ~ Max at 16:54 Nighttime cooling rate 0.432 °/hr from 19:43 to 07:9 (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 | | 41.0 DDB / 18.2 CWB | 27.1 CDB / 23.2 DWB | -0.4 DB |12.2 DB| 41.4 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.15 % | 9.95 % | 27.22 % | 0.26 % | 0.30 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 10.00 % | 27.35 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.41 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=277) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 8229| 41.1| 23.9| 17.2| 15:48| 06:06| |+/- 756|+/- 0.6|+/- 3.8|+/- 3.7|+/-01:06|+/-02:15| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=196) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 5221| 23.5| 19.9| 3.7| 16:54| -4:33| |+/- 1818|+/- 0.7|+/- 2.0|+/- 2.0|+/-04:30|+/-08:09| +/- 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 | | 40.6 / 23.3 | 41.4 / 23.4 || -0.6 | 2.9 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 40.0 DDB / 18.1 CWB | 27.1 CDB / 22.9 DWB | 0.0 DB | 0.4 % | 39.0 DDB / 18.0 CWB | 27.2 CDB / 22.2 DWB | 1.5 DB | 1.0 % | 37.8 DDB / 17.6 CWB | 27.6 CDB / 21.4 DWB | 3.0 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 491 | 815 | 857 | 499 | mean annual degrees days |+/- 107 |+/- 137 |+/- 144 |+/- 101 | +/- 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| | 20563 | 11982 | 247 | 5 | mean annual degrees hours |+/- 3465 |+/- 2414 |+/- 209 |+/- 9 | +/- 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 | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 29.4| 28.1| 25.2| 20.5| 15.5| 12.0| 11.8| 14.7| 19.4| 23.3| 26.0| 28.1| Average Temperature (DB) | 1.8| 1.6| 1.9| 1.7| 1.6| 1.8| 1.5| 1.5| 1.9| 1.9| 1.6| 1.2| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 5| 2| 68| 487| 1624| 2917| 3235| 2180| 900| 287| 68| 12| HD-Hr base 15 °C | 16| 5| 81| 302| 585| 877| 724| 594| 360| 196| 74| 17| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 34| 32| 249| 1079| 2803| 4454| 4823| 3433| 1647| 690| 235| 75| HD-Hr base 18 °C | 62| 36| 193| 463| 733| 1024| 844| 728| 535| 350| 162| 59| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 4360| 3254| 2369| 945| 199| 42| 49| 227| 874| 1867| 2715| 3663| CD-Hr base 24 °C | 1013| 834| 838| 448| 155| 54| 51| 169| 405| 632| 712| 639| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 2830| 1990| 1314| 406| 49| 6| 6| 65| 400| 1019| 1614| 2282| CD-Hr base 27 °C | 801| 642| 599| 273| 60| 13| 10| 79| 232| 419| 540| 501| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 78| 102| 35| 2| 0| 0| 0| 0| 0| 2| 3| 25| NECD-Hr base 21 °C | 114| 139| 58| 8| 0| 0| 0| 0| 1| 12| 7| 35| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 2| 1| 0| 0| 0| 0| 0| 0| 0| 1| 0| 0| NECD-Hr base 24 °C | 4| 3| 3| 1| 0| 0| 0| 0| 1| 7| 0| 1| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 16.6| 16.7| 14.5| 11.5| 9.0| 6.8| 6.0| 7.1| 9.6| 12.0| 14.1| 15.5| Average Wet Bulb Temp (WB) | 1.6| 2.0| 1.7| 1.5| 1.5| 1.6| 1.6| 1.3| 1.1| 1.2| 1.2| 1.2| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 4.80% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 41.4| 40.0| 37.6| 34.2| 30.0| 27.0| 27.3| 30.9| 34.8| 38.1| 40.0| 41.1| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 41.1| 40.0| 37.9| 34.4| 30.0| 26.4| 27.0| 30.1| 34.4| 37.7| 39.7| 40.4| Design maximum DB | 28.9| 27.7| 25.1| 21.0| 17.5| 14.9| 14.4| 17.2| 21.8| 25.0| 26.9| 28.0| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 15.5| 15.3| 11.2| 6.6| 2.2| -0.8| -1.5| -0.2| 3.2| 7.3| 10.7| 13.0| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 2.28% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 23.5| 22.9| 21.8| 18.9| 16.6| 14.7| 14.2| 15.4| 17.9| 19.5| 21.1| 22.4| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 23.0| 23.3| 22.3| 19.4| 17.2| 15.3| 14.6| 15.2| 17.5| 19.1| 20.4| 22.0| Design maximum WB | 22.2| 22.5| 21.5| 18.0| 15.3| 12.8| 11.8| 12.5| 15.2| 17.2| 19.2| 21.2| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 8.1| 8.5| 6.0| 2.8| 0.2| -2.3| -2.9| -2.4| 0.1| 2.4| 5.3| 7.1| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|