Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB(39) station Mt Isa 45 years (1967-2011)| | BoM 29127 (WMO 94332) -20.68° latitude 139.49° longitude 340.9 m alt| | | |It is now 04-Jul-2013 02:51:56 -> computational time was 7 minutes| | OUTPUTS | | INPUTS => NEW33/39/IS_39_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/39/IS_39_DB.txt (Dry Design Day)| | B: CZ0303_NatHERS_1967-2011_w.txt => NEW33/39/IS_39_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/39/IS_39_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 40.6 °C Design DB = mean of 10th highest 3PM each year + (std dev * 1.26) => this Design DB was exceeded 9.8 days/year (incl std dev 4.4 days/year). 40.7 ° alternative Design DB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design DB was exceeded 8.9 days/year (incl std dev 4.1 days/year). Design drybulb changes -0.5 °C per century (linear regression R² -0.07) ~> 40.4 °C mid century. 24.8 ° Design WB = mean of 10th highest 3PM each year + (std dev * 2.29) => this Design WB was exceeded 10.7 days/year (incl std dev 4.9 days/year). 24.9 ° alternative Design WB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design WB was exceeded 7.8 days/year (incl std dev 4.0 days/year). Design wetbulb changes 3.2 °C per century (linear regression R²=0.59) ~> 26.9 °C mid century. 4.9 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 1.02) => this Heating DB was insufficient 9.8 days/year (incl std dev 5.5 days/year). 3.8 ° alternative Heating Design = mean of 10th lowest daily minimum each year - (1 std dev) => alternative Heating Design was insufficient 9.8 days/year (incl std dev 4.2 days/year). Design heating changes -4.5 °C per century (linear regression R²=-0.42) ~> 1.1 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 05:45 followed by maximum temperature at 16:08. Nighttime cooling rate 0.714 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 06:23 ~ Max at 15:48 Nighttime cooling rate 1.067 °/hr from 19:49 to 07:13 (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at -1:25 ~ Max at 17:06 Nighttime cooling rate 0.279 °/hr from 19:42 to 07:12 (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 | | 40.6 DDB / 19.0 CWB | 28.0 CDB / 24.8 DWB | 4.9 DB |12.2 DB| 35.7 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.17 % | 23.02 % | 32.33 % | 0.15 % | 0.33 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 23.09 % | 32.40 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.32 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=343) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 8036| 40.6| 23.7| 16.9| 15:48| 06:23| |+/- 542|+/- 0.6|+/- 3.6|+/- 3.6|+/-01:06|+/-01:12| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=220) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 5324| 24.8| 21.5| 3.4| 17:06| -1:25| |+/- 1593|+/- 0.6|+/- 1.9|+/- 1.9|+/-04:18|+/-07:23| +/- 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 | | 40.3 / 24.6 | 41.0 / 24.6 || 4.4 | 8.9 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 39.9 DDB / 18.9 CWB | 27.8 CDB / 24.4 DWB | 5.2 DB | 0.4 % | 38.8 DDB / 18.8 CWB | 27.8 CDB / 23.9 DWB | 7.0 DB | 1.0 % | 37.7 DDB / 18.8 CWB | 27.8 CDB / 23.5 DWB | 8.7 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 149 | 314 | 1129 | 639 | mean annual degrees days |+/- 42 |+/- 64 |+/- 168 |+/- 124 | +/- 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| | 27105 | 15333 | 1556 | 35 | mean annual degrees hours |+/- 4023 |+/- 2982 |+/- 746 |+/- 37 | +/- 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 | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 29.6| 28.9| 27.7| 25.1| 20.6| 17.2| 16.6| 18.9| 22.9| 26.7| 28.8| 29.9| Average Temperature (DB) | 2.0| 1.7| 1.3| 1.3| 1.4| 1.4| 1.1| 1.1| 1.4| 1.3| 1.2| 1.3| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 1| 0| 3| 23| 316| 930| 1251| 795| 227| 33| 2| 0| HD-Hr base 15 °C | 8| 1| 14| 31| 234| 394| 395| 304| 139| 39| 4| 2| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 4| 4| 18| 111| 822| 1882| 2322| 1596| 608| 134| 21| 7| HD-Hr base 18 °C | 16| 10| 41| 97| 409| 576| 514| 429| 259| 99| 23| 11| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 4210| 3376| 3090| 1889| 701| 234| 229| 608| 1569| 2971| 3771| 4457| CD-Hr base 24 °C | 1269| 1013| 762| 517| 286| 158| 124| 225| 451| 615| 700| 824| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 2578| 1946| 1694| 899| 216| 48| 46| 209| 795| 1751| 2334| 2818| CD-Hr base 27 °C | 981| 805| 549| 342| 144| 53| 46| 134| 301| 457| 545| 667| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 496| 530| 219| 23| 0| 0| 0| 0| 0| 6| 56| 225| NECD-Hr base 21 °C | 352| 333| 201| 48| 0| 0| 0| 0| 1| 11| 72| 171| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 13| 16| 3| 0| 0| 0| 0| 0| 0| 0| 0| 3| NECD-Hr base 24 °C | 21| 23| 5| 2| 0| 0| 0| 0| 0| 0| 1| 7| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 20.1| 20.5| 18.2| 14.8| 12.1| 9.6| 8.7| 9.5| 11.7| 14.3| 16.5| 18.5| Average Wet Bulb Temp (WB) | 1.5| 1.4| 1.5| 1.4| 1.4| 1.0| 1.2| 1.1| 1.3| 1.0| 1.3| 1.2| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 5.38% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 40.2| 38.7| 37.2| 35.1| 32.1| 29.8| 30.2| 33.1| 36.4| 38.9| 40.5| 41.2| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 40.0| 39.5| 37.2| 35.0| 31.8| 29.3| 29.3| 32.3| 36.0| 38.4| 40.0| 40.7| Design maximum DB | 28.7| 28.0| 27.0| 24.6| 21.3| 17.6| 16.7| 19.0| 22.7| 25.5| 27.5| 28.5| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 19.0| 19.1| 16.8| 12.4| 7.4| 3.7| 2.6| 3.7| 7.4| 11.6| 15.2| 16.9| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 1.97% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 25.1| 24.9| 24.3| 21.6| 19.2| 17.3| 16.7| 17.4| 19.0| 21.5| 23.0| 24.3| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 24.8| 24.9| 24.1| 22.3| 19.6| 17.4| 17.4| 17.5| 19.3| 20.8| 22.9| 23.8| Design maximum WB | 24.0| 24.1| 23.2| 20.9| 17.4| 14.2| 13.9| 14.1| 17.6| 19.9| 22.1| 23.2| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 11.8| 13.1| 10.0| 7.0| 3.7| 0.9| -0.3| 0.0| 2.4| 5.0| 7.5| 9.7| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|