Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB(71) station Atherton 45 years (1967-2011)| | BoM 31210 (WMO 94288) -17.07° latitude 145.43° longitude 473.1 m alt| | | |It is now 04-Jul-2013 06:06:51 -> computational time was 7 minutes| | OUTPUTS | | INPUTS => NEW33/71/AT_71_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/71/AT_71_DB.txt (Dry Design Day)| | B: CZ0107_NatHERS_1967-2011_w.txt => NEW33/71/AT_71_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/71/AT_71_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 34.5 °C Design DB = mean of 10th highest 3PM each year + (std dev * 1.38) => this Design DB was exceeded 10.0 days/year (incl std dev 4.5 days/year). 34.7 ° alternative Design DB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design DB was exceeded 9.5 days/year (incl std dev 4.3 days/year). Design drybulb changes 2.2 °C per century (linear regression R² 0.29) ~> 36.0 °C mid century. 24.4 ° Design WB = mean of 10th highest 3PM each year + (std dev * 1.53) => this Design WB was exceeded 9.4 days/year (incl std dev 5.6 days/year). 24.2 ° alternative Design WB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design WB was exceeded 17.5 days/year (incl std dev 10.5 days/year). Design wetbulb changes 11.2 °C per century (linear regression R²=0.88) ~> 31.0 °C mid century. 11.6 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 0.94) => this Heating DB was insufficient 10.1 days/year (incl std dev 5.7 days/year). 10.0 ° alternative Heating Design = mean of 10th lowest daily minimum each year - (1 std dev) => alternative Heating Design was insufficient 8.3 days/year (incl std dev 4.4 days/year). Design heating changes -7.2 °C per century (linear regression R²=-0.53) ~> 5.7 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 05:08 followed by maximum temperature at 14:43. Nighttime cooling rate 0.303 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 05:13 ~ Max at 15:06 Nighttime cooling rate 0.423 °/hr from 19:51 to 06:56 (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at 01:32 ~ Max at 15:36 Nighttime cooling rate 0.191 °/hr from 19:59 to 07:11 (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 | | 34.5 DDB / 19.9 CWB | 27.5 CDB / 24.4 DWB | 11.6 DB |10.1 DB| 22.9 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.17 % | 18.71 % | 14.07 % | 0.11 % | 0.67 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 18.79 % | 14.11 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.29 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=283) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 7159| 34.7| 21.7| 13.0| 15:06| 05:13| |+/- 1098|+/- 0.8|+/- 3.1|+/- 3.3|+/-00:48|+/-03:33| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=334) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 5648| 24.3| 21.5| 2.9| 15:36| 01:32| |+/- 1355|+/- 0.5|+/- 1.0|+/- 1.0|+/-02:54|+/-06:50| +/- 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 | | 34.1 / 24.1 | 35.1 / 24.4 || 10.2 | 13.9 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 33.4 DDB / 19.9 CWB | 26.9 CDB / 23.9 DWB | 10.9 DB | 0.4 % | 32.3 DDB / 19.8 CWB | 26.5 CDB / 23.4 DWB | 12.3 DB | 1.0 % | 31.4 DDB / 19.8 CWB | 26.1 CDB / 23.0 DWB | 13.3 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 29 | 139 | 417 | 138 | mean annual degrees days |+/- 18 |+/- 49 |+/- 88 |+/- 42 | +/- 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| | 9999 | 3317 | 1052 | 11 | mean annual degrees hours |+/- 2116 |+/- 1004 |+/- 1240 |+/- 18 | +/- 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 | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 25.2| 25.1| 24.2| 22.9| 21.0| 19.3| 18.3| 19.1| 21.0| 23.1| 24.4| 25.3| Average Temperature (DB) | 1.1| 0.9| 0.7| 0.9| 0.9| 1.0| 1.2| 1.0| 1.0| 1.0| 0.9| 0.9| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 0| 0| 0| 2| 26| 123| 286| 180| 71| 9| 6| 1| HD-Hr base 15 °C | 1| 0| 2| 8| 49| 130| 237| 135| 74| 13| 28| 3| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 11| 3| 13| 40| 218| 580| 1027| 815| 440| 128| 38| 14| HD-Hr base 18 °C | 33| 6| 24| 57| 188| 323| 479| 320| 243| 105| 80| 32| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 1519| 1233| 1097| 620| 311| 124| 95| 201| 587| 1119| 1417| 1675| CD-Hr base 24 °C | 479| 429| 306| 228| 161| 90| 88| 130| 205| 325| 335| 426| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 558| 394| 321| 112| 31| 7| 6| 22| 150| 424| 590| 702| CD-Hr base 27 °C | 264| 215| 159| 88| 36| 12| 13| 26| 99| 203| 215| 256| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 266| 327| 158| 46| 4| 1| 0| 0| 2| 12| 51| 187| NECD-Hr base 21 °C | 351| 384| 215| 103| 11| 3| 1| 1| 8| 41| 99| 253| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 3| 4| 3| 0| 0| 0| 0| 0| 0| 0| 0| 1| NECD-Hr base 24 °C | 5| 7| 9| 0| 0| 0| 0| 0| 0| 0| 2| 3| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 20.3| 20.8| 19.5| 17.9| 15.9| 14.4| 12.9| 13.2| 14.4| 16.6| 18.0| 19.7| Average Wet Bulb Temp (WB) | 1.1| 1.0| 1.1| 1.3| 1.3| 1.2| 1.6| 1.5| 1.6| 1.3| 1.4| 1.2| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 5.23% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 33.8| 32.7| 32.1| 30.2| 29.0| 27.8| 27.5| 28.9| 31.9| 33.8| 34.9| 34.7| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 33.2| 32.3| 31.6| 29.9| 28.6| 27.4| 27.0| 28.4| 31.2| 33.2| 33.9| 34.6| Design maximum DB | 24.5| 24.9| 23.7| 22.4| 20.6| 19.4| 18.4| 18.6| 19.8| 21.7| 22.8| 24.5| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 18.1| 18.8| 17.3| 16.4| 13.7| 11.4| 10.4| 10.6| 12.1| 14.4| 16.0| 17.6| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 2.12% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 22.5| 23.0| 22.2| 20.5| 18.9| 18.0| 16.7| 17.0| 18.3| 19.6| 21.0| 22.0| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 24.2| 24.5| 24.0| 23.0| 21.2| 20.0| 19.0| 19.4| 20.8| 21.7| 23.0| 23.7| Design maximum WB | 22.8| 23.1| 22.2| 21.4| 19.5| 18.0| 17.5| 17.3| 18.8| 20.1| 21.5| 22.6| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 16.4| 17.8| 16.1| 14.8| 11.9| 9.6| 8.1| 8.2| 10.1| 12.4| 14.0| 15.8| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|