Eric Laurentius Peterson, copyright 2013, by author- e.peterson@uq.edu.au) ___________________________________________________________________________ | Analysis of Australian Climate Data Bank (ACDB) version from NIWA 2013 | | ACDB(32) station Cairns 45 years (1967-2011)| | BoM 31011 (WMO 94287) -16.87° latitude 145.75° longitude 8.3 m alt| | | |It is now 04-Jul-2013 02:06:28 -> computational time was 7 minutes| | OUTPUTS | | INPUTS => NEW33/32/CN_32_Table.txt (this print out)| | A: ACDB_in/NatH_CZ.csv => NEW33/32/CN_32_DB.txt (Dry Design Day)| | B: CZ0106_NatHERS_1967-2011_w.txt => NEW33/32/CN_32_WB.txt (Wet Design Day)| | C: ACDB33.m => NEW33/32/CN_32_CR.txt (Critical D Day)| | => NEW33/ACDB_Table1.txt (compare others)| |_________________________________________________________________________| ANALYSIS SUMMARY ___________________________________________________________________________ 33.3 °C Design DB = mean of 10th highest 3PM each year + (std dev * 1.44) => this Design DB was exceeded 10.0 days/year (incl std dev 4.1 days/year). 33.5 ° alternative Design DB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design DB was exceeded 9.3 days/year (incl std dev 3.9 days/year). Design drybulb changes 0.1 °C per century (linear regression R² 0.01) ~> 33.5 °C mid century. 26.8 ° Design WB = mean of 10th highest 3PM each year + (std dev * 2.09) => this Design WB was exceeded 10.1 days/year (incl std dev 4.4 days/year). 26.8 ° alternative Design WB = mean of 10th highest daily maximum each year + (1 std dev) => alternative Design WB was exceeded 10.1 days/year (incl std dev 4.4 days/year). Design wetbulb changes 1.5 °C per century (linear regression R²=0.44) ~> 27.7 °C mid century. 13.9 ° Heating DB = mean of 10th lowest 8AM each year - (std dev * 0.94) => this Heating DB was insufficient 9.6 days/year (incl std dev 4.7 days/year). 12.8 ° alternative Heating Design = mean of 10th lowest daily minimum each year - (1 std dev) => alternative Heating Design was insufficient 9.9 days/year (incl std dev 4.7 days/year). Design heating changes -1.8 °C per century (linear regression R²=-0.17) ~> 11.8 °C mid century. __________________________________________________________________________ Diurnal patterns generally and coincident with design temperatures General average diurnal minimum temperature at 05:11 followed by maximum temperature at 14:34. Nighttime cooling rate 0.267 °/hr (average of all data). Diurnal pattern of days with 3PM DB ~ Design DB ~ Min at 05:39 ~ Max at 14:24 Nighttime cooling rate 0.366 °/hr from 19:46 to 07:14 (evenings following 3PM design conditions). Diurnal pattern of days with 3PM WB ~ Design WB ~ Min at 01:38 ~ Max at 15:36 Nighttime cooling rate 0.253 °/hr from 19:45 to 07:18 (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 | | 33.3 DDB / 24.3 CWB | 29.9 CDB / 26.8 DWB | 13.9 DB | 7.1 DB| 19.4 DB| |_____________________|______________________|___________|_______|________| |percentage of hourly data exceeding levels |hours below| |design DB | coinc WB | coinc DB | design WB | design DB | | 0.21 % | 9.15 % | 6.10 % | 0.15 % | 0.49 % | |__________|__________|__________|___________|___________| |design DB & coinc WB | coinc DB % design WB | | 9.26 % | 6.15 % | |_____________________|______________________| | design DB concurrent with design WB | | 0.36 % | |____________________________________________| Coincident from 3PM DB within degree of DDB (n=424) _______________________________________________________ | dGHI | DBmax | DBmin | DBrng | HmaxDB | HminDB | | 7311| 33.3| 24.3| 8.9| 14:24| 05:39| |+/- 684|+/- 0.7|+/- 1.6|+/- 1.5|+/-01:00|+/-02:27| +/- standard deviation |________|________|________|________|________|________| Coincident from 3PM WB within degree of DWB (n=541) _______________________________________________________ | dGHI | WBmax | WBmin | WBrng | HmaxWB | HminWB | | 6474| 26.6| 23.4| 3.2| 15:36| 01:38| |+/- 1227|+/- 0.5|+/- 1.2|+/- 1.3|+/-02:30|+/-07:44| +/- 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 | | 33.2 / 26.6 | 34.2 / 26.8 || 12.9 | 16.4 | |________________________________________________||_______________________| ASHRAE design temperatures exclude 0.4% 1% and 2% of hours. ___________________________________________________________ | design DB / coinc WB | coinc DB / design WB | heating | | 32.7 DDB / 24.2 CWB | 29.6 CDB / 26.4 DWB | 13.5 DB | 0.4 % | 31.9 DDB / 24.1 CWB | 29.2 CDB / 26.0 DWB | 15.0 DB | 1.0 % | 31.2 DDB / 23.9 CWB | 28.8 CDB / 25.6 DWB | 16.3 DB | 2.0 % |_________________________________________________________| Degree day base temps 15 °C, 18 °C, 24 °C, and 27 °C. ____________________________________________________ |Heating DD15|Heating DD18|Cooling DD24|Cooling DD27| | 5 | 30 | 588 | 173 | mean annual degrees days |+/- 4 |+/- 16 |+/- 67 |+/- 31 | +/- 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| | 14109 | 4161 | 8653 | 933 | mean annual degrees hours |+/- 1605 |+/- 749 |+/- 1760 |+/- 405 | +/- 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 | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 27.1| 26.9| 26.2| 24.8| 23.2| 21.4| 20.8| 21.5| 23.0| 24.7| 26.1| 27.0| Average Temperature (DB) | 0.6| 0.7| 0.4| 0.7| 0.7| 0.9| 0.8| 0.8| 0.8| 0.7| 0.6| 0.7| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 0| 0| 0| 0| 4| 35| 58| 25| 4| 0| 0| 0| HD-Hr base 15 °C | 0| 0| 0| 1| 11| 51| 63| 32| 7| 0| 0| 0| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 0| 0| 0| 2| 34| 168| 273| 173| 55| 6| 0| 0| HD-Hr base 18 °C | 0| 0| 0| 8| 58| 160| 183| 131| 60| 13| 0| 0| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 2341| 1947| 1736| 1038| 544| 230| 165| 296| 624| 1174| 1725| 2291| CD-Hr base 24 °C | 407| 420| 273| 312| 149| 107| 85| 128| 197| 276| 297| 463| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 872| 661| 535| 242| 62| 10| 4| 17| 92| 285| 539| 841| CD-Hr base 27 °C | 261| 254| 148| 124| 37| 13| 7| 20| 64| 124| 155| 279| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 1797| 1786| 1419| 662| 213| 39| 13| 21| 71| 324| 816| 1492| NECD-Hr base 21 °C | 441| 324| 350| 414| 215| 52| 25| 38| 132| 284| 438| 537| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 252| 254| 129| 34| 2| 0| 0| 0| 1| 8| 62| 190| NECD-Hr base 24 °C | 156| 137| 88| 66| 6| 1| 0| 0| 2| 19| 90| 153| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 23.5| 23.7| 22.9| 21.5| 19.7| 17.7| 16.9| 17.4| 18.5| 20.2| 21.8| 23.0| Average Wet Bulb Temp (WB) | 0.7| 0.5| 0.6| 0.9| 1.0| 1.0| 1.1| 0.9| 1.0| 1.0| 0.9| 0.9| +/- standard deviation |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Dry Design Day => 5.38% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 34.2| 33.5| 32.7| 31.1| 29.4| 28.1| 27.5| 28.4| 30.2| 31.3| 32.8| 34.0| Maximum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 33.4| 32.9| 32.0| 30.8| 29.0| 27.8| 27.3| 28.1| 29.7| 30.9| 31.9| 33.0| Design maximum DB | 26.3| 26.4| 25.7| 24.9| 23.4| 22.1| 21.5| 21.5| 22.7| 24.3| 25.5| 26.5| Design minimum DB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 21.7| 22.1| 20.8| 19.0| 16.2| 13.2| 12.0| 12.8| 15.0| 17.6| 19.9| 21.2| Minimum Temperature (DB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| Wet Design Day => 1.97% from hour/month bins _________________________________________________________________________ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 27.0| 26.9| 26.5| 25.1| 23.6| 22.6| 21.5| 21.8| 22.7| 24.2| 25.7| 26.6| Maximum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 26.8| 26.9| 26.4| 25.6| 24.1| 22.9| 21.9| 22.3| 23.4| 24.6| 26.1| 26.7| Design maximum WB | 25.0| 25.1| 24.5| 24.0| 22.6| 21.0| 20.6| 20.5| 21.6| 23.1| 24.3| 24.9| Design minimum WB |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____| | 19.2| 20.0| 18.7| 17.0| 13.5| 10.9| 9.8| 10.5| 12.6| 14.5| 17.0| 18.5| Minimum Temperature (WB) |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|