Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB(70) station Toowoomba 45 years (1967-2011)| | BoM 41529 (WMO 95551) -27.54° latitude 151.91° longitude 641.5 m alt| | | |It is now 04-Jul-2013 06:00:11 -> computational time was 7 minutes| | OUTPUTS | | INPUTS => NEW33/70/TW_70_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/70/TW_70_DB.txt (Dry Design Day)| | B: CZ0502_NatHERS_1967-2011_w.txt => NEW33/70/TW_70_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/70/TW_70_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 32.9 °C Design DB = mean of 10th highest 3PM each year + (std dev * 1.44) => this Design DB was exceeded 10.2 days/year (incl std dev 4.5 days/year). 32.9 ° 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 4.3 days/year). Design drybulb changes 2.2 °C per century (linear regression R² 0.24) ~> 34.2 °C mid century. 24.0 ° Design WB = mean of 10th highest 3PM each year + (std dev * 2.73) => this Design WB was exceeded 9.8 days/year (incl std dev 7.6 days/year). 22.8 ° alternative Design WB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design WB was exceeded 17.9 days/year (incl std dev 12.2 days/year). Design wetbulb changes -1.7 °C per century (linear regression R²=-0.23) ~> 21.8 °C mid century. 3.6 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 0.91) => this Heating DB was insufficient 10.4 days/year (incl std dev 4.3 days/year). 2.6 ° alternative Heating Design = mean of 10th lowest daily minimum each year - (1 std dev) => alternative Heating Design was insufficient 9.4 days/year (incl std dev 3.7 days/year). Design heating changes -0.6 °C per century (linear regression R²=-0.09) ~> 2.2 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 05:18 followed by maximum temperature at 15:05. Nighttime cooling rate 0.444 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 04:30 ~ Max at 15:48 Nighttime cooling rate 0.624 °/hr from 19:46 to 06:44 (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at 03:33 ~ Max at 15:06 Nighttime cooling rate 0.453 °/hr from 19:45 to 06:40 (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 | | 32.9 DDB / 18.8 CWB | 26.9 CDB / 24.0 DWB | 3.6 DB |10.8 DB| 29.3 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.22 % | 9.42 % | 4.26 % | 0.17 % | 0.66 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 9.53 % | 4.33 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.38 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=191) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 7689| 33.2| 19.8| 13.4| 15:48| 04:30| |+/- 1003|+/- 0.8|+/- 2.8|+/- 2.7|+/-00:54|+/-04:33| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=119) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 6192| 24.2| 17.2| 7.0| 15:06| 03:33| |+/- 1395|+/- 0.7|+/- 3.0|+/- 3.0|+/-01:30|+/-05:23| +/- 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 | | 32.8 / 23.5 | 34.0 / 24.2 || 2.3 | 5.0 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 31.9 DDB / 18.8 CWB | 26.7 CDB / 22.8 DWB | 2.9 DB | 0.4 % | 30.1 DDB / 18.7 CWB | 25.9 CDB / 21.9 DWB | 4.3 DB | 1.0 % | 28.7 DDB / 18.7 CWB | 25.1 CDB / 21.2 DWB | 5.5 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 521 | 1021 | 113 | 33 | mean annual degrees days |+/- 82 |+/- 111 |+/- 33 |+/- 14 | +/- 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| | 2718 | 790 | 212 | 9 | mean annual degrees hours |+/- 794 |+/- 333 |+/- 414 |+/- 39 | +/- 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 | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 21.7| 21.2| 19.9| 17.5| 14.3| 11.5| 10.9| 12.2| 15.2| 17.5| 19.3| 21.1| Average Temperature (DB) | 1.2| 1.3| 0.9| 1.0| 0.9| 0.9| 0.8| 1.1| 1.3| 1.4| 1.4| 1.5| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 67| 54| 102| 365| 1327| 2606| 3108| 2493| 1297| 665| 311| 121| HD-Hr base 15 °C | 94| 73| 95| 192| 380| 520| 521| 551| 451| 319| 226| 139| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 313| 277| 541| 1222| 2826| 4441| 5047| 4250| 2555| 1624| 945| 473| HD-Hr base 18 °C | 248| 223| 235| 338| 497| 607| 579| 678| 620| 500| 378| 294| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 675| 434| 275| 63| 3| 0| 0| 6| 55| 193| 375| 639| CD-Hr base 24 °C | 328| 254| 187| 70| 10| 0| 0| 27| 66| 177| 267| 349| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 215| 114| 60| 8| 0| 0| 0| 1| 8| 51| 120| 214| CD-Hr base 27 °C | 164| 106| 74| 17| 1| 0| 0| 8| 14| 74| 130| 168| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 82| 74| 19| 0| 0| 0| 0| 0| 0| 1| 3| 32| NECD-Hr base 21 °C | 163| 185| 75| 0| 1| 0| 0| 0| 0| 5| 7| 60| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 3| 4| 0| 0| 0| 0| 0| 0| 0| 0| 0| 2| NECD-Hr base 24 °C | 16| 23| 1| 0| 0| 0| 0| 0| 0| 1| 0| 7| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 17.8| 17.8| 16.3| 13.7| 10.9| 8.5| 7.3| 8.0| 10.4| 12.7| 14.7| 16.8| Average Wet Bulb Temp (WB) | 1.2| 1.2| 0.9| 0.9| 1.1| 0.9| 1.2| 1.2| 1.1| 0.9| 1.4| 1.3| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 4.73% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 33.4| 32.1| 30.8| 27.5| 23.7| 20.6| 20.8| 23.3| 27.5| 30.3| 32.1| 33.4| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 32.6| 31.4| 30.0| 27.1| 22.8| 19.9| 19.8| 22.6| 27.0| 29.8| 31.7| 33.0| Design maximum DB | 22.4| 21.8| 20.3| 18.0| 15.2| 12.9| 11.9| 12.9| 15.9| 18.4| 21.0| 22.2| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 12.2| 12.4| 10.7| 8.1| 4.8| 1.7| 1.4| 1.9| 3.7| 5.9| 8.2| 10.6| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 2.68% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 23.1| 22.6| 21.4| 19.0| 16.7| 14.8| 13.8| 14.6| 16.7| 19.0| 20.7| 22.4| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 23.9| 24.1| 22.3| 19.1| 17.0| 14.9| 14.5| 14.8| 16.3| 18.9| 20.9| 22.6| Design maximum WB | 20.8| 20.8| 19.0| 16.9| 14.7| 12.6| 11.7| 11.8| 13.9| 16.1| 18.8| 20.4| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 10.6| 10.7| 8.5| 6.4| 3.3| 0.5| 0.3| 0.3| 2.0| 3.7| 6.3| 8.5| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|